<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:afb10891-c002-4b21-9f61-fd75a4edef1f,g:a327542c-076b-4200-a713-cd504d78844e-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.nninc.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeLoss" xlink:type="simple" xlink:href="nnbr-20251231.xsd#ConsolidatedStatementsofOperationsandComprehensiveIncomeLoss"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeLoss" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019cb4e0-d232-7fca-b5ff-f3284620563e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019cb4e0-d232-753e-ae50-7ae070fd46df" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019cb4e0-d232-7fca-b5ff-f3284620563e" xlink:to="loc_us-gaap_OperatingIncomeLoss_019cb4e0-d232-753e-ae50-7ae070fd46df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_019cb4e0-d232-7129-87c7-43a743990eed" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019cb4e0-d232-7fca-b5ff-f3284620563e" xlink:to="loc_us-gaap_InterestExpense_019cb4e0-d232-7129-87c7-43a743990eed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019cb4e0-d232-7aaa-8ac6-6645957b300e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019cb4e0-d232-7fca-b5ff-f3284620563e" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019cb4e0-d232-7aaa-8ac6-6645957b300e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019cb527-fc4a-78ef-8a15-abc79c0bc1ed" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019cb4e0-d232-7fca-b5ff-f3284620563e" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019cb527-fc4a-78ef-8a15-abc79c0bc1ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_c122af1f-d045-4cbe-b3b8-df19840f0f96" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_90b50cbf-b403-4ab2-94ac-3628a6611be7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_c122af1f-d045-4cbe-b3b8-df19840f0f96" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_90b50cbf-b403-4ab2-94ac-3628a6611be7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_4750f607-f524-441a-92a2-bf91a44bc447" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_c122af1f-d045-4cbe-b3b8-df19840f0f96" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_4750f607-f524-441a-92a2-bf91a44bc447" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseNet_785c9525-5f95-4e32-a81b-7d3dbc0cf1a8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherOperatingIncomeExpenseNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_c122af1f-d045-4cbe-b3b8-df19840f0f96" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseNet_785c9525-5f95-4e32-a81b-7d3dbc0cf1a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_ea06a799-07b0-48b6-894f-5b89cf7ceb44" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_c122af1f-d045-4cbe-b3b8-df19840f0f96" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_ea06a799-07b0-48b6-894f-5b89cf7ceb44" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_7e5d10c0-832e-4f68-a7c2-67a5652b185b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_c122af1f-d045-4cbe-b3b8-df19840f0f96" xlink:to="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_7e5d10c0-832e-4f68-a7c2-67a5652b185b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cb048-ca6c-7361-a29c-1636b48dc8e7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019cb048-ca6c-7ce5-9673-4dfc0dc25e71" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019cb048-ca6c-7361-a29c-1636b48dc8e7" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019cb048-ca6c-7ce5-9673-4dfc0dc25e71" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019cb048-ca6c-72e4-adf8-d28bb9f58f60" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019cb048-ca6c-7361-a29c-1636b48dc8e7" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019cb048-ca6c-72e4-adf8-d28bb9f58f60" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019cb048-ca6c-78d0-b87c-0c5328baa310" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019cb048-ca6c-7361-a29c-1636b48dc8e7" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019cb048-ca6c-78d0-b87c-0c5328baa310" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019cb04a-9026-79ef-9c2a-7559e3c3403d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_019cb04a-9026-7fc4-af15-f3bf660f7487" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019cb04a-9026-79ef-9c2a-7559e3c3403d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_019cb04a-9026-7fc4-af15-f3bf660f7487" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_019cb04a-9026-7e3e-982d-513fcbd07403" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019cb04a-9026-79ef-9c2a-7559e3c3403d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_019cb04a-9026-7e3e-982d-513fcbd07403" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_019cb04a-9026-742d-b379-6d0475ae1713" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019cb04a-9026-79ef-9c2a-7559e3c3403d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_019cb04a-9026-742d-b379-6d0475ae1713" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_019cb04a-d3a8-7272-8602-f3b26189ff95" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019cb529-b44e-7d29-a933-81d90cdc815e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019cb04a-d3a8-7272-8602-f3b26189ff95" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019cb529-b44e-7d29-a933-81d90cdc815e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cb04a-d3a8-7542-91f7-b0de0ca76905" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019cb04a-d3a8-7272-8602-f3b26189ff95" xlink:to="loc_us-gaap_NetIncomeLoss_019cb04a-d3a8-7542-91f7-b0de0ca76905" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="nnbr-20251231.xsd#ConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e3f6dceb-e931-4d8c-b6b6-101565f46d8f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_e88bb499-744d-422d-ae33-d7c37c288b38" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e3f6dceb-e931-4d8c-b6b6-101565f46d8f" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_e88bb499-744d-422d-ae33-d7c37c288b38" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_3ca27460-3004-4394-a258-f1e477b54f26" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e3f6dceb-e931-4d8c-b6b6-101565f46d8f" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_3ca27460-3004-4394-a258-f1e477b54f26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_d37f5fd4-5ae8-4b03-8aa6-0bf204959f01" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e3f6dceb-e931-4d8c-b6b6-101565f46d8f" xlink:to="loc_us-gaap_CommonStockValue_d37f5fd4-5ae8-4b03-8aa6-0bf204959f01" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_39cc0fc1-1bb9-41e6-b778-07a372f46795" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_e3f6dceb-e931-4d8c-b6b6-101565f46d8f" xlink:to="loc_us-gaap_AdditionalPaidInCapital_39cc0fc1-1bb9-41e6-b778-07a372f46795" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_e8dc2f2e-fb11-40df-9c3d-58b7570f0742" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_effe338c-bb34-4d35-8895-25661d3b811b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e8dc2f2e-fb11-40df-9c3d-58b7570f0742" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_effe338c-bb34-4d35-8895-25661d3b811b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_15cabf26-98b7-426f-9a17-d5a28f03dc11" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e8dc2f2e-fb11-40df-9c3d-58b7570f0742" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_15cabf26-98b7-426f-9a17-d5a28f03dc11" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_345bdb62-6200-4c60-84ff-2c51fbeaf29c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e8dc2f2e-fb11-40df-9c3d-58b7570f0742" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_345bdb62-6200-4c60-84ff-2c51fbeaf29c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_b875852a-e504-45d7-ae75-b7a18c5c2a34" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e8dc2f2e-fb11-40df-9c3d-58b7570f0742" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_b875852a-e504-45d7-ae75-b7a18c5c2a34" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_1b274770-9d13-4e42-96d4-ccbe3a674339" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e8dc2f2e-fb11-40df-9c3d-58b7570f0742" xlink:to="loc_us-gaap_AssetsCurrent_1b274770-9d13-4e42-96d4-ccbe3a674339" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent_e620cc56-1fc4-4b03-ace1-8c598eda90ce" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e8dc2f2e-fb11-40df-9c3d-58b7570f0742" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent_e620cc56-1fc4-4b03-ace1-8c598eda90ce" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_b807eaf6-4e40-4092-814a-4ee5d742471a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityMethodInvestments"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e8dc2f2e-fb11-40df-9c3d-58b7570f0742" xlink:to="loc_us-gaap_EquityMethodInvestments_b807eaf6-4e40-4092-814a-4ee5d742471a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_c5476b6d-5daa-46d3-803a-b8b7ed77c2ff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e8dc2f2e-fb11-40df-9c3d-58b7570f0742" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_c5476b6d-5daa-46d3-803a-b8b7ed77c2ff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_a3a4c978-df58-4f73-8e7f-5de98d74f193" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_7c3ec446-352a-45f1-8986-e4fcd3096088" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_a3a4c978-df58-4f73-8e7f-5de98d74f193" xlink:to="loc_us-gaap_LiabilitiesCurrent_7c3ec446-352a-45f1-8986-e4fcd3096088" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_ac85a584-0a48-4bfc-aead-dae7eb74ed51" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_a3a4c978-df58-4f73-8e7f-5de98d74f193" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_ac85a584-0a48-4bfc-aead-dae7eb74ed51" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_7b48dc9d-49df-459a-92c2-cecdb760f004" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_a3a4c978-df58-4f73-8e7f-5de98d74f193" xlink:to="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_7b48dc9d-49df-459a-92c2-cecdb760f004" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesNoncurrent_3aab06a5-b0d7-4285-940f-94fb08f0e9c5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedIncomeTaxesNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_a3a4c978-df58-4f73-8e7f-5de98d74f193" xlink:to="loc_us-gaap_AccruedIncomeTaxesNoncurrent_3aab06a5-b0d7-4285-940f-94fb08f0e9c5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_f6ab1cdf-957f-4b70-86db-56aecfa21804" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_a3a4c978-df58-4f73-8e7f-5de98d74f193" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_f6ab1cdf-957f-4b70-86db-56aecfa21804" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_79f68a92-01b9-41d8-843e-a781e093b67d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_a3a4c978-df58-4f73-8e7f-5de98d74f193" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_79f68a92-01b9-41d8-843e-a781e093b67d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_27551112-9c11-455a-83ac-ea95e18bd908" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_a3a4c978-df58-4f73-8e7f-5de98d74f193" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_27551112-9c11-455a-83ac-ea95e18bd908" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_9eb344da-cc99-4942-949d-aa54a54742ce" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_185bf29e-f376-479d-a9f1-f3309677dc89" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_9eb344da-cc99-4942-949d-aa54a54742ce" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_185bf29e-f376-479d-a9f1-f3309677dc89" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_0ada6716-4250-4ec0-8d52-223085f01a93" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_9eb344da-cc99-4942-949d-aa54a54742ce" xlink:to="loc_us-gaap_CommitmentsAndContingencies_0ada6716-4250-4ec0-8d52-223085f01a93" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_acb519da-fbe0-49c2-976d-093ab333f941" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_9eb344da-cc99-4942-949d-aa54a54742ce" xlink:to="loc_us-gaap_Liabilities_acb519da-fbe0-49c2-976d-093ab333f941" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_651bd0c1-956c-45ee-9c8c-2fdd6a4b10ed" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_9eb344da-cc99-4942-949d-aa54a54742ce" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_651bd0c1-956c-45ee-9c8c-2fdd6a4b10ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_621131b6-3807-4d58-bdbb-31e585d821d3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_accced6c-0df7-45e8-91af-a58f44fa0e28" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedIncomeTaxesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_621131b6-3807-4d58-bdbb-31e585d821d3" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_accced6c-0df7-45e8-91af-a58f44fa0e28" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_460c9dff-c2ce-4f3c-ba0e-caf01216e76a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_621131b6-3807-4d58-bdbb-31e585d821d3" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_460c9dff-c2ce-4f3c-ba0e-caf01216e76a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_231c6235-735e-454d-8840-72864bd9b459" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_621131b6-3807-4d58-bdbb-31e585d821d3" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_231c6235-735e-454d-8840-72864bd9b459" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_ac9ef376-bac2-4532-8a58-f28b193085d7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_621131b6-3807-4d58-bdbb-31e585d821d3" xlink:to="loc_us-gaap_AccountsPayableCurrent_ac9ef376-bac2-4532-8a58-f28b193085d7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_be5d765b-9b7e-4b97-b067-fe5d0a4b7983" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_621131b6-3807-4d58-bdbb-31e585d821d3" xlink:to="loc_us-gaap_LongTermDebtCurrent_be5d765b-9b7e-4b97-b067-fe5d0a4b7983" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_fd52b279-5bf9-4976-a48a-b193a719c870" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_621131b6-3807-4d58-bdbb-31e585d821d3" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_fd52b279-5bf9-4976-a48a-b193a719c870" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_bfce47a9-3a3f-41fd-9e1d-f75104dece9a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ab144164-472a-4aed-b0f5-782a41794a72" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bfce47a9-3a3f-41fd-9e1d-f75104dece9a" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ab144164-472a-4aed-b0f5-782a41794a72" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_620fbdce-6fec-4dd5-96d7-c6097fb3ec0d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bfce47a9-3a3f-41fd-9e1d-f75104dece9a" xlink:to="loc_us-gaap_OtherAssetsCurrent_620fbdce-6fec-4dd5-96d7-c6097fb3ec0d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesReceivable_d467b4f4-0d31-4dbc-b533-12a495c0db3a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxesReceivable"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bfce47a9-3a3f-41fd-9e1d-f75104dece9a" xlink:to="loc_us-gaap_IncomeTaxesReceivable_d467b4f4-0d31-4dbc-b533-12a495c0db3a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_c8f562ce-675b-405c-a98a-f119e6f9e03b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bfce47a9-3a3f-41fd-9e1d-f75104dece9a" xlink:to="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_c8f562ce-675b-405c-a98a-f119e6f9e03b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_0390277a-7863-48b1-8793-215ac59d615d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bfce47a9-3a3f-41fd-9e1d-f75104dece9a" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_0390277a-7863-48b1-8793-215ac59d615d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_0e3c59bc-b97e-4113-9b63-660416ded118" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bfce47a9-3a3f-41fd-9e1d-f75104dece9a" xlink:to="loc_us-gaap_InventoryNet_0e3c59bc-b97e-4113-9b63-660416ded118" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssets_0d0ce7e5-1918-4914-b987-816249641d9b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PrepaidExpenseAndOtherAssets"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bfce47a9-3a3f-41fd-9e1d-f75104dece9a" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssets_0d0ce7e5-1918-4914-b987-816249641d9b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="nnbr-20251231.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_d6fbb675-2060-4d07-ae37-2cf5b51384d4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_d6fbb675-2060-4d07-ae37-2cf5b51384d4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_ad90ba8e-72cb-48cf-b109-c9c35415e78d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_ad90ba8e-72cb-48cf-b109-c9c35415e78d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaidInKindInterest_37e40d43-0946-4f7b-8156-fe3931ab1201" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaidInKindInterest"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_PaidInKindInterest_37e40d43-0946-4f7b-8156-fe3931ab1201" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_6d77491c-b84b-4227-ba60-23bae36502ec" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_6d77491c-b84b-4227-ba60-23bae36502ec" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_456507b8-9bcd-4f6e-a83b-9afbbf7b973a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_456507b8-9bcd-4f6e-a83b-9afbbf7b973a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_3d2c5e6e-4c03-4be6-a067-2cf4288e7982" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_3d2c5e6e-4c03-4be6-a067-2cf4288e7982" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_e1488930-cffa-4db5-ab03-a76630a0bafc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_ProfitLoss_e1488930-cffa-4db5-ab03-a76630a0bafc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_fcff143c-0092-45dc-8cc3-aa7e868cff3d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_fcff143c-0092-45dc-8cc3-aa7e868cff3d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_c7e3e505-3869-4b6b-9694-234f9657ffcd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_c7e3e505-3869-4b6b-9694-234f9657ffcd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_3137ca42-2adf-4738-a715-ea01a8afa48e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_3137ca42-2adf-4738-a715-ea01a8afa48e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet_14248572-357b-4892-8dd3-915817277c52" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet_14248572-357b-4892-8dd3-915817277c52" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_2bc28104-c9ce-4fe1-b858-37c695991627" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_2bc28104-c9ce-4fe1-b858-37c695991627" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetImpairmentCharges_b830b11d-df86-40a3-b1a7-891aea6e6356" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssetImpairmentCharges"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_OtherAssetImpairmentCharges_b830b11d-df86-40a3-b1a7-891aea6e6356" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_6c273e64-3d2a-49c2-83aa-021e6798b003" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_6c273e64-3d2a-49c2-83aa-021e6798b003" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_61b14456-e7d3-418a-9cd1-965c98b8fce5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_61b14456-e7d3-418a-9cd1-965c98b8fce5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_236598ae-48db-4ceb-bf43-7961df8e21f6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_236598ae-48db-4ceb-bf43-7961df8e21f6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_0266d3d5-3c5d-447a-9bb6-d4448294f1a8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_ShareBasedCompensation_0266d3d5-3c5d-447a-9bb6-d4448294f1a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_1f9795e9-0084-4f24-b017-c89ffbe51a4a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:calculationArc order="18" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_0ea77fa1-3543-4799-919b-48e50ede9fe8" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_1f9795e9-0084-4f24-b017-c89ffbe51a4a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7541cdf7-5ce1-45a5-b04d-4e822d937367" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_34edb8f4-46f2-40cc-b4c7-17eca5512623" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7541cdf7-5ce1-45a5-b04d-4e822d937367" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_34edb8f4-46f2-40cc-b4c7-17eca5512623" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_5ff60238-7adf-4de9-a7fd-42e52b683063" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7541cdf7-5ce1-45a5-b04d-4e822d937367" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_5ff60238-7adf-4de9-a7fd-42e52b683063" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f2785bb4-9c7e-4ba9-9225-9e29fdd20a5a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7541cdf7-5ce1-45a5-b04d-4e822d937367" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f2785bb4-9c7e-4ba9-9225-9e29fdd20a5a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4538585e-0214-4458-94f4-71ed85599848" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7541cdf7-5ce1-45a5-b04d-4e822d937367" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4538585e-0214-4458-94f4-71ed85599848" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb4f5-743d-7bb0-b22e-2589014cb754" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt_019cb4f5-743d-761a-b843-62ca9844b0d7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromIssuanceOfSecuredDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb4f5-743d-7bb0-b22e-2589014cb754" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt_019cb4f5-743d-761a-b843-62ca9844b0d7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfSecuredDebt_019cb4f5-743d-7f6f-82fb-f382ef8c9c26" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RepaymentsOfSecuredDebt"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb4f5-743d-7bb0-b22e-2589014cb754" xlink:to="loc_us-gaap_RepaymentsOfSecuredDebt_019cb4f5-743d-7f6f-82fb-f382ef8c9c26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt_019cb4f5-743d-7b1e-a1f7-242e771e212c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb4f5-743d-7bb0-b22e-2589014cb754" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt_019cb4f5-743d-7b1e-a1f7-242e771e212c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfOtherLongTermDebt_019cb4f5-743d-7f2e-979d-738cda071bb9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RepaymentsOfOtherLongTermDebt"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb4f5-743d-7bb0-b22e-2589014cb754" xlink:to="loc_us-gaap_RepaymentsOfOtherLongTermDebt_019cb4f5-743d-7f2e-979d-738cda071bb9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_PaymentsofDebtIssuanceCostsandPrepaymentCosts_019cb4f5-743d-78a9-b867-a2a3ef8e9091" xlink:href="nnbr-20251231.xsd#nnbr_PaymentsofDebtIssuanceCostsandPrepaymentCosts"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb4f5-743d-7bb0-b22e-2589014cb754" xlink:to="loc_nnbr_PaymentsofDebtIssuanceCostsandPrepaymentCosts_019cb4f5-743d-78a9-b867-a2a3ef8e9091" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_ProceedsFromFailedSaleLeasebackOfEquipment_019cb4f5-743d-7630-ba81-e6d1e514b6d2" xlink:href="nnbr-20251231.xsd#nnbr_ProceedsFromFailedSaleLeasebackOfEquipment"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb4f5-743d-7bb0-b22e-2589014cb754" xlink:to="loc_nnbr_ProceedsFromFailedSaleLeasebackOfEquipment_019cb4f5-743d-7630-ba81-e6d1e514b6d2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_ProceedsFromFailedSaleLeasebackOfLandAndBuildings_019cb4f5-743d-750f-bc1d-2d485ae657ed" xlink:href="nnbr-20251231.xsd#nnbr_ProceedsFromFailedSaleLeasebackOfLandAndBuildings"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb4f5-743d-7bb0-b22e-2589014cb754" xlink:to="loc_nnbr_ProceedsFromFailedSaleLeasebackOfLandAndBuildings_019cb4f5-743d-750f-bc1d-2d485ae657ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_RepaymentsOfFinancingObligations_019cb4f5-743d-7454-be92-3b1071b6ce4e" xlink:href="nnbr-20251231.xsd#nnbr_RepaymentsOfFinancingObligations"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb4f5-743d-7bb0-b22e-2589014cb754" xlink:to="loc_nnbr_RepaymentsOfFinancingObligations_019cb4f5-743d-7454-be92-3b1071b6ce4e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_019cb4f5-743d-7862-9f48-375daa8b6397" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb4f5-743d-7bb0-b22e-2589014cb754" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_019cb4f5-743d-7862-9f48-375daa8b6397" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_263f6894-baf8-4694-84bd-c8f5b91d0c1f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForHedgeInvestingActivities_ccbba83f-9ee5-4a16-81b4-b85ed58bb20b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsForHedgeInvestingActivities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_263f6894-baf8-4694-84bd-c8f5b91d0c1f" xlink:to="loc_us-gaap_PaymentsForHedgeInvestingActivities_ccbba83f-9ee5-4a16-81b4-b85ed58bb20b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_1b44037c-df07-47b6-a172-20a8f2c871d7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_263f6894-baf8-4694-84bd-c8f5b91d0c1f" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_1b44037c-df07-47b6-a172-20a8f2c871d7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_7893ce68-c812-42e5-959f-bf46285e2f31" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_263f6894-baf8-4694-84bd-c8f5b91d0c1f" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_7893ce68-c812-42e5-959f-bf46285e2f31" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_81657217-3910-46e5-bf5f-80aafe322066" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_263f6894-baf8-4694-84bd-c8f5b91d0c1f" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_81657217-3910-46e5-bf5f-80aafe322066" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_b4fc7959-26af-4880-be8a-8037a708e518" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_263f6894-baf8-4694-84bd-c8f5b91d0c1f" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_b4fc7959-26af-4880-be8a-8037a708e518" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/InventoriesSummaryofInventoriesDetail" xlink:type="simple" xlink:href="nnbr-20251231.xsd#InventoriesSummaryofInventoriesDetail"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/InventoriesSummaryofInventoriesDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_eb522913-8c0b-40c2-a0a2-0d0d187a90c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_149d8245-de93-4263-bc36-c938908ef8c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryRawMaterialsNetOfReserves"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_eb522913-8c0b-40c2-a0a2-0d0d187a90c7" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_149d8245-de93-4263-bc36-c938908ef8c7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_03fd3497-6a06-4520-820d-1c73429dc5da" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryWorkInProcessNetOfReserves"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_eb522913-8c0b-40c2-a0a2-0d0d187a90c7" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_03fd3497-6a06-4520-820d-1c73429dc5da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_dc39d946-cf8b-4d3c-92a6-4fce4930247b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_eb522913-8c0b-40c2-a0a2-0d0d187a90c7" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_dc39d946-cf8b-4d3c-92a6-4fce4930247b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/PropertyPlantandEquipmentSummaryofPropertyPlantandEquipmentDetail" xlink:type="simple" xlink:href="nnbr-20251231.xsd#PropertyPlantandEquipmentSummaryofPropertyPlantandEquipmentDetail"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/PropertyPlantandEquipmentSummaryofPropertyPlantandEquipmentDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_744f187c-427d-4ff2-ad2a-984c9133e105" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_9e6a6eab-2831-4185-84a9-06e0de8355b9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_744f187c-427d-4ff2-ad2a-984c9133e105" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_9e6a6eab-2831-4185-84a9-06e0de8355b9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_63d8f96b-6e60-4977-9c32-2d217f4aaab7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_744f187c-427d-4ff2-ad2a-984c9133e105" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_63d8f96b-6e60-4977-9c32-2d217f4aaab7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/IntangibleAssetsNetSummaryofCarryingAmountofIntangibleAssetsbyMajorAssetClassDetail" xlink:type="simple" xlink:href="nnbr-20251231.xsd#IntangibleAssetsNetSummaryofCarryingAmountofIntangibleAssetsbyMajorAssetClassDetail"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/IntangibleAssetsNetSummaryofCarryingAmountofIntangibleAssetsbyMajorAssetClassDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_33c0d69d-2e18-45c1-a4d7-e4192fca1714" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_84b1a3ba-fe8e-4ee3-aa26-5b3d62884847" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_33c0d69d-2e18-45c1-a4d7-e4192fca1714" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_84b1a3ba-fe8e-4ee3-aa26-5b3d62884847" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_06ddb2fa-df3e-4baf-8551-c59f4963b8a6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_33c0d69d-2e18-45c1-a4d7-e4192fca1714" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_06ddb2fa-df3e-4baf-8551-c59f4963b8a6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/LeasesFinanceandOperatingLeaseCostDetails" xlink:type="simple" xlink:href="nnbr-20251231.xsd#LeasesFinanceandOperatingLeaseCostDetails"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/LeasesFinanceandOperatingLeaseCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_LeaseRightOfUseAsset_1b4eb367-9511-4279-a8ae-8338e2ceb4cf" xlink:href="nnbr-20251231.xsd#nnbr_LeaseRightOfUseAsset"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_7e701888-601d-4253-aa7f-d742804d8f1a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_nnbr_LeaseRightOfUseAsset_1b4eb367-9511-4279-a8ae-8338e2ceb4cf" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_7e701888-601d-4253-aa7f-d742804d8f1a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_47582d80-d073-4959-825e-57be5e537f23" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseRightOfUseAsset"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_nnbr_LeaseRightOfUseAsset_1b4eb367-9511-4279-a8ae-8338e2ceb4cf" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_47582d80-d073-4959-825e-57be5e537f23" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_4c6634e7-c484-4209-a6e4-31bc6225b3f7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_46a05d01-9210-4aff-9b2b-b1e377798d55" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseRightOfUseAssetAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_4c6634e7-c484-4209-a6e4-31bc6225b3f7" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_46a05d01-9210-4aff-9b2b-b1e377798d55" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseInterestExpense_1f8ee496-188d-4ae6-96e3-02e185c24b0a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseInterestExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_4c6634e7-c484-4209-a6e4-31bc6225b3f7" xlink:to="loc_us-gaap_FinanceLeaseInterestExpense_1f8ee496-188d-4ae6-96e3-02e185c24b0a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_b5368906-3e8b-4f8e-91b5-69efed9a3ff3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_4c6634e7-c484-4209-a6e4-31bc6225b3f7" xlink:to="loc_us-gaap_OperatingLeaseCost_b5368906-3e8b-4f8e-91b5-69efed9a3ff3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_eade2091-9636-490a-9d55-a8bef5383db1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShortTermLeaseCost"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_4c6634e7-c484-4209-a6e4-31bc6225b3f7" xlink:to="loc_us-gaap_ShortTermLeaseCost_eade2091-9636-490a-9d55-a8bef5383db1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_5bd8b266-c993-4c3a-8364-e9d4250d9099" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableLeaseCost"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_4c6634e7-c484-4209-a6e4-31bc6225b3f7" xlink:to="loc_us-gaap_VariableLeaseCost_5bd8b266-c993-4c3a-8364-e9d4250d9099" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubleaseIncome_6bd704a0-dcab-482e-9add-fce37c8ce644" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubleaseIncome"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_4c6634e7-c484-4209-a6e4-31bc6225b3f7" xlink:to="loc_us-gaap_SubleaseIncome_6bd704a0-dcab-482e-9add-fce37c8ce644" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_LeaseLiability_ddfd5860-7596-451a-9f90-d220fcb2ca1a" xlink:href="nnbr-20251231.xsd#nnbr_LeaseLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_94bf5460-b7c7-4811-ad4e-ee3b0e7ebfb6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_nnbr_LeaseLiability_ddfd5860-7596-451a-9f90-d220fcb2ca1a" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_94bf5460-b7c7-4811-ad4e-ee3b0e7ebfb6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_886ee409-8f0f-48f6-95b9-0d5f0a2f6db5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_nnbr_LeaseLiability_ddfd5860-7596-451a-9f90-d220fcb2ca1a" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_886ee409-8f0f-48f6-95b9-0d5f0a2f6db5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_14fd2ae5-72f4-4665-b59a-9aeb99cf6858" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_nnbr_LeaseLiability_ddfd5860-7596-451a-9f90-d220fcb2ca1a" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_14fd2ae5-72f4-4665-b59a-9aeb99cf6858" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_2ef688d0-b71a-4544-83c0-7d2c9b66f01a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_nnbr_LeaseLiability_ddfd5860-7596-451a-9f90-d220fcb2ca1a" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_2ef688d0-b71a-4544-83c0-7d2c9b66f01a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/LeasesFutureMinimumLeaseObligationsDetails" xlink:type="simple" xlink:href="nnbr-20251231.xsd#LeasesFutureMinimumLeaseObligationsDetails"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/LeasesFutureMinimumLeaseObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_e07bca27-8a28-4aed-ad9d-678fa43fb74d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_300f7db1-e1f1-4fc6-af3e-ae8dfa8ac152" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_e07bca27-8a28-4aed-ad9d-678fa43fb74d" xlink:to="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_300f7db1-e1f1-4fc6-af3e-ae8dfa8ac152" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_765af3e3-a3b6-443a-bd1d-d851607fb4fd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_e07bca27-8a28-4aed-ad9d-678fa43fb74d" xlink:to="loc_us-gaap_FinanceLeaseLiability_765af3e3-a3b6-443a-bd1d-d851607fb4fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2415ef7f-0d6d-439c-844d-e8bfc3b9066d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_b0bc0c74-b99c-4131-878e-51040ddfc3b5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2415ef7f-0d6d-439c-844d-e8bfc3b9066d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_b0bc0c74-b99c-4131-878e-51040ddfc3b5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_22324907-edc7-4246-822b-61499f678434" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2415ef7f-0d6d-439c-844d-e8bfc3b9066d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_22324907-edc7-4246-822b-61499f678434" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_31a135ef-c789-4e4b-a6cd-5e9cc14c7958" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2415ef7f-0d6d-439c-844d-e8bfc3b9066d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_31a135ef-c789-4e4b-a6cd-5e9cc14c7958" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_8b4fbf9b-0e84-4f5e-90ae-3fe5b7231a48" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2415ef7f-0d6d-439c-844d-e8bfc3b9066d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_8b4fbf9b-0e84-4f5e-90ae-3fe5b7231a48" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_3aef7ee2-48c7-4fd6-88b3-32b94e987c9b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2415ef7f-0d6d-439c-844d-e8bfc3b9066d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_3aef7ee2-48c7-4fd6-88b3-32b94e987c9b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_3fede1a7-d432-4182-8315-6b9406d15737" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2415ef7f-0d6d-439c-844d-e8bfc3b9066d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_3fede1a7-d432-4182-8315-6b9406d15737" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/LeasesFutureMinimumLeaseObligationsDetails_1" xlink:type="simple" xlink:href="nnbr-20251231.xsd#LeasesFutureMinimumLeaseObligationsDetails_1"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/LeasesFutureMinimumLeaseObligationsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_aeaa8c7a-6abd-4927-8a2b-6a2ae617ea3e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_e2119d6e-9770-45f6-ab7a-668da18cd064" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_aeaa8c7a-6abd-4927-8a2b-6a2ae617ea3e" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_e2119d6e-9770-45f6-ab7a-668da18cd064" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_4e55e69a-a7bc-4526-bada-a0b23e4e955c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_aeaa8c7a-6abd-4927-8a2b-6a2ae617ea3e" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_4e55e69a-a7bc-4526-bada-a0b23e4e955c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_dca0bfc1-4a2f-451e-b3b5-5abf0f54f545" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_aeaa8c7a-6abd-4927-8a2b-6a2ae617ea3e" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_dca0bfc1-4a2f-451e-b3b5-5abf0f54f545" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_12e7e238-f703-4d73-ad50-f171410b7adf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_aeaa8c7a-6abd-4927-8a2b-6a2ae617ea3e" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_12e7e238-f703-4d73-ad50-f171410b7adf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_9ac672c3-92dc-4387-97f6-57a917ffde02" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_aeaa8c7a-6abd-4927-8a2b-6a2ae617ea3e" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_9ac672c3-92dc-4387-97f6-57a917ffde02" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_f7a2a120-df48-4ba7-ac40-c03476dc10f8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_aeaa8c7a-6abd-4927-8a2b-6a2ae617ea3e" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_f7a2a120-df48-4ba7-ac40-c03476dc10f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_ae6459fa-30c1-4ed6-9013-c710e91e5802" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_5a5add1b-5d46-41d8-9689-792ebc343bbb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_ae6459fa-30c1-4ed6-9013-c710e91e5802" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_5a5add1b-5d46-41d8-9689-792ebc343bbb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_299bf6f5-b4eb-49ae-a1c3-14983eafd9f4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_ae6459fa-30c1-4ed6-9013-c710e91e5802" xlink:to="loc_us-gaap_OperatingLeaseLiability_299bf6f5-b4eb-49ae-a1c3-14983eafd9f4" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/IncomeTaxesIncomeTaxExpenseBenefitDetail" xlink:type="simple" xlink:href="nnbr-20251231.xsd#IncomeTaxesIncomeTaxExpenseBenefitDetail"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/IncomeTaxesIncomeTaxExpenseBenefitDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_85faeb20-e3de-4193-8bd1-e8423db41015" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_0b2a7778-292c-40a2-b1c9-adf672965eba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_85faeb20-e3de-4193-8bd1-e8423db41015" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_0b2a7778-292c-40a2-b1c9-adf672965eba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_cb322a2c-4820-4f7a-b87a-d5996f923cd6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_85faeb20-e3de-4193-8bd1-e8423db41015" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_cb322a2c-4820-4f7a-b87a-d5996f923cd6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_DeferredFederalAndForeignIncomeTaxExpenseBenefitValuationAllowance_d0adb10e-9d7b-44ea-8e04-323ff6f36974" xlink:href="nnbr-20251231.xsd#nnbr_DeferredFederalAndForeignIncomeTaxExpenseBenefitValuationAllowance"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_85faeb20-e3de-4193-8bd1-e8423db41015" xlink:to="loc_nnbr_DeferredFederalAndForeignIncomeTaxExpenseBenefitValuationAllowance_d0adb10e-9d7b-44ea-8e04-323ff6f36974" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_da854f12-e781-43c5-a0e3-67b7b25a29ea" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_85faeb20-e3de-4193-8bd1-e8423db41015" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_da854f12-e781-43c5-a0e3-67b7b25a29ea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_93fad70e-6fbf-481a-add4-cb41b3577c02" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_414c79aa-86ff-499d-aacc-a605c91b486b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrentFederalTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_93fad70e-6fbf-481a-add4-cb41b3577c02" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_414c79aa-86ff-499d-aacc-a605c91b486b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_220f24d4-fc3f-4f38-a9c9-9c2252949a0a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_93fad70e-6fbf-481a-add4-cb41b3577c02" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_220f24d4-fc3f-4f38-a9c9-9c2252949a0a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_336cd01b-6d39-4066-890f-48af8b10c9a7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrentForeignTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_93fad70e-6fbf-481a-add4-cb41b3577c02" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_336cd01b-6d39-4066-890f-48af8b10c9a7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/IncomeTaxesReconciliationofIncomeTaxesBasedonUSFederalStatutoryRateDetail" xlink:type="simple" xlink:href="nnbr-20251231.xsd#IncomeTaxesReconciliationofIncomeTaxesBasedonUSFederalStatutoryRateDetail"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/IncomeTaxesReconciliationofIncomeTaxesBasedonUSFederalStatutoryRateDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings_ae282c73-cbd7-4b67-bfdc-cf3eef686f12" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings_ae282c73-cbd7-4b67-bfdc-cf3eef686f12" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_EffectiveIncomeTaxRateReconciliationWarrantRevaluationRate_99e7506a-54a6-4cfb-8de1-cfca75aa0e45" xlink:href="nnbr-20251231.xsd#nnbr_EffectiveIncomeTaxRateReconciliationWarrantRevaluationRate"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_nnbr_EffectiveIncomeTaxRateReconciliationWarrantRevaluationRate_99e7506a-54a6-4cfb-8de1-cfca75aa0e45" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_5dd8e740-a236-4347-8e10-1d5520702201" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_5dd8e740-a236-4347-8e10-1d5520702201" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_19c7bb6c-c008-4827-8676-b07908c2ec66" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_19c7bb6c-c008-4827-8676-b07908c2ec66" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_62dc2bd7-0b74-4932-a148-574adcccdfcf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_62dc2bd7-0b74-4932-a148-574adcccdfcf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_EffectiveIncomeTaxRateReconciliationIntercompanyLendingPercent_4e3438e8-8f79-4d0b-a223-2f6699abbdf9" xlink:href="nnbr-20251231.xsd#nnbr_EffectiveIncomeTaxRateReconciliationIntercompanyLendingPercent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_nnbr_EffectiveIncomeTaxRateReconciliationIntercompanyLendingPercent_4e3438e8-8f79-4d0b-a223-2f6699abbdf9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent_a3d0308b-4782-4ca2-aaa2-24979abaa7c8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent_a3d0308b-4782-4ca2-aaa2-24979abaa7c8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes_a6e43898-c619-47ef-b876-2ed49b7015be" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes_a6e43898-c619-47ef-b876-2ed49b7015be" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_fd8512dc-0851-40a1-877d-8c73a8500662" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_fd8512dc-0851-40a1-877d-8c73a8500662" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_599c3681-64aa-40f7-804e-684a4af7072f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_599c3681-64aa-40f7-804e-684a4af7072f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses_270fb6c3-9b55-42ea-818a-7d847216a8bc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses_270fb6c3-9b55-42ea-818a-7d847216a8bc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_c8e8b2a9-aab3-4f97-b73b-2714c480200e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_c8e8b2a9-aab3-4f97-b73b-2714c480200e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationDispositionOfBusiness_c2e90789-659a-4b8a-aa4b-3387fb27842d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationDispositionOfBusiness"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationDispositionOfBusiness_c2e90789-659a-4b8a-aa4b-3387fb27842d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_EffectiveIncomeTaxRateReconciliationReturntoProvision_3ee31340-ef85-4df2-980b-3b91971fdc52" xlink:href="nnbr-20251231.xsd#nnbr_EffectiveIncomeTaxRateReconciliationReturntoProvision"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_nnbr_EffectiveIncomeTaxRateReconciliationReturntoProvision_3ee31340-ef85-4df2-980b-3b91971fdc52" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_5dc5c6b2-5f19-4d67-8f61-f4d9f372031a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_5dc5c6b2-5f19-4d67-8f61-f4d9f372031a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_EffectiveIncomeTaxRateReconciliationDeferredTrueUpPercent_4097e85e-de80-4594-af9c-7bd96e4b03e0" xlink:href="nnbr-20251231.xsd#nnbr_EffectiveIncomeTaxRateReconciliationDeferredTrueUpPercent"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_nnbr_EffectiveIncomeTaxRateReconciliationDeferredTrueUpPercent_4097e85e-de80-4594-af9c-7bd96e4b03e0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_EffectiveIncomeTaxRateReconciliationInterestOnCARESActRefund_e6c42a46-0395-436b-8ba9-3b8593d5ff5c" xlink:href="nnbr-20251231.xsd#nnbr_EffectiveIncomeTaxRateReconciliationInterestOnCARESActRefund"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_c8bbcb6c-8b0d-429e-8402-66cc50a54d63" xlink:to="loc_nnbr_EffectiveIncomeTaxRateReconciliationInterestOnCARESActRefund_e6c42a46-0395-436b-8ba9-3b8593d5ff5c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_019ca2b2-c50e-7cff-9873-1bd8d546a699" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_019ca2b2-c50e-7cff-9873-1bd8d546a699" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_019ca2b2-c50e-72a5-8e8c-00d21f518381" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_019ca2b2-c50e-72a5-8e8c-00d21f518381" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_019ca2b2-c50e-7b27-8acc-85c98c06dfa5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_019ca2b2-c50e-7b27-8acc-85c98c06dfa5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019ca2b2-c50e-726c-a2de-802bf672df08" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019ca2b2-c50e-726c-a2de-802bf672df08" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_019ca2b2-c50e-73d7-bb08-48f582c6157a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_019ca2b2-c50e-73d7-bb08-48f582c6157a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiAmount_019ca2b2-c50e-7e7f-8286-351e135668c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationGiltiAmount"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiAmount_019ca2b2-c50e-7e7f-8286-351e135668c7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCredits_019ca2b2-c50e-712e-a49f-d69c6c083950" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationTaxCredits"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCredits_019ca2b2-c50e-712e-a49f-d69c6c083950" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_019ca2b2-c50e-7b3e-af28-4b6ac977ce5f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_019ca2b2-c50e-7b3e-af28-4b6ac977ce5f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_EffectiveIncomeTaxRateReconciliationWarrantRevaluationRate_019ca2b2-c50e-7076-ada1-15b78b543676" xlink:href="nnbr-20251231.xsd#nnbr_EffectiveIncomeTaxRateReconciliationWarrantRevaluationRate"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_nnbr_EffectiveIncomeTaxRateReconciliationWarrantRevaluationRate_019ca2b2-c50e-7076-ada1-15b78b543676" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_019ca2b2-c50e-78c4-8782-5051c0f6f121" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_019ca2b2-c50e-78c4-8782-5051c0f6f121" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherReconcilingItems_019ca2b2-c50e-7d2c-a49d-7365291a8b1f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationOtherReconcilingItems"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherReconcilingItems_019ca2b2-c50e-7d2c-a49d-7365291a8b1f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_019ca2b2-c50e-76ed-bcf5-8e5cab56d3c0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_019ca2b2-c50e-76ed-bcf5-8e5cab56d3c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_019ca2b2-c50e-72de-946e-2606289a66b7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ca2b2-c50e-7c00-97cc-ca9f6fb6fd1d" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_019ca2b2-c50e-72de-946e-2606289a66b7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/IncomeTaxesAdditionalInformationDetail" xlink:type="simple" xlink:href="nnbr-20251231.xsd#IncomeTaxesAdditionalInformationDetail"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/IncomeTaxesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_019ca2c3-ce00-7733-bb65-6a169aff8758" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019ca2c3-ce00-7b30-af93-c29c56a5b820" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxPaidFederalAfterRefundReceived"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_019ca2c3-ce00-7733-bb65-6a169aff8758" xlink:to="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019ca2c3-ce00-7b30-af93-c29c56a5b820" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019ca2c3-ce00-7b2b-86c6-f3cc181f9690" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_019ca2c3-ce00-7733-bb65-6a169aff8758" xlink:to="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019ca2c3-ce00-7b2b-86c6-f3cc181f9690" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_019ca2c3-ce00-7cd3-9cae-d181a46e9efb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxPaidForeignAfterRefundReceived"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_019ca2c3-ce00-7733-bb65-6a169aff8758" xlink:to="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_019ca2c3-ce00-7cd3-9cae-d181a46e9efb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/IncomeTaxesPrincipalComponentsofDeferredTaxAssetsandLiabilitiesDetail" xlink:type="simple" xlink:href="nnbr-20251231.xsd#IncomeTaxesPrincipalComponentsofDeferredTaxAssetsandLiabilitiesDetail"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/IncomeTaxesPrincipalComponentsofDeferredTaxAssetsandLiabilitiesDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_d874a87d-be8e-4841-ae09-54815a6743c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesDerivatives_4cad4658-0af9-4ede-a404-0ca258bded34" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilitiesDerivatives"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d874a87d-be8e-4841-ae09-54815a6743c7" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesDerivatives_4cad4658-0af9-4ede-a404-0ca258bded34" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_b9dd79c1-46c2-4d0e-8c82-686e4ffcf185" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilitiesOther"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d874a87d-be8e-4841-ae09-54815a6743c7" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_b9dd79c1-46c2-4d0e-8c82-686e4ffcf185" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_272348b2-234b-4920-8cf7-a34e864d084c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d874a87d-be8e-4841-ae09-54815a6743c7" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_272348b2-234b-4920-8cf7-a34e864d084c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_2eb045ab-00f1-4ef8-8159-300e9ebd6bcc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d874a87d-be8e-4841-ae09-54815a6743c7" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_2eb045ab-00f1-4ef8-8159-300e9ebd6bcc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_3058ee01-d941-40ea-b94b-bb72ad00b0ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilitiesLeasingArrangements"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d874a87d-be8e-4841-ae09-54815a6743c7" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_3058ee01-d941-40ea-b94b-bb72ad00b0ab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_6d4f3621-ab43-4921-8271-2dba6753a097" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d874a87d-be8e-4841-ae09-54815a6743c7" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_6d4f3621-ab43-4921-8271-2dba6753a097" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilities_48259f0e-f683-467f-bfe5-7c01eb6d2589" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_f136be75-b616-4688-886f-22c129a46c17" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_48259f0e-f683-467f-bfe5-7c01eb6d2589" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_f136be75-b616-4688-886f-22c129a46c17" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_42a67914-fef3-4ae0-b51e-dfa186c5334d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_48259f0e-f683-467f-bfe5-7c01eb6d2589" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_42a67914-fef3-4ae0-b51e-dfa186c5334d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets_7eb52d28-78fc-48bf-912d-4d077be44e5c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets_7eb52d28-78fc-48bf-912d-4d077be44e5c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOtherLossCarryforwards_cd30a57a-cafc-47db-a019-4ca2d16e0906" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsOtherLossCarryforwards"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsOtherLossCarryforwards_cd30a57a-cafc-47db-a019-4ca2d16e0906" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsInventory_7b6ad63e-4687-4234-b115-44bc7a008f30" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsInventory"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsInventory_7b6ad63e-4687-4234-b115-44bc7a008f30" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves_caed5711-550e-4e62-a0aa-d9ed4be0d04a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves_caed5711-550e-4e62-a0aa-d9ed4be0d04a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_DeferredTaxAssetOperatingLeaseRightOfUseAssets_f701d3be-94ca-4d5d-994a-0ec4d9acb814" xlink:href="nnbr-20251231.xsd#nnbr_DeferredTaxAssetOperatingLeaseRightOfUseAssets"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_nnbr_DeferredTaxAssetOperatingLeaseRightOfUseAssets_f701d3be-94ca-4d5d-994a-0ec4d9acb814" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_2e90d001-2691-4d75-a479-36e41dc02395" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwards"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_2e90d001-2691-4d75-a479-36e41dc02395" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_63be4ded-9545-4095-ade0-da1e2e93e526" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_63be4ded-9545-4095-ade0-da1e2e93e526" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_82aa52f0-ea4a-4f04-9990-29d15e226e20" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_82aa52f0-ea4a-4f04-9990-29d15e226e20" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions_9d93eabf-cf96-4514-b7bc-ba4f8589ae21" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions_9d93eabf-cf96-4514-b7bc-ba4f8589ae21" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsDerivativeInstruments_e959640a-eadc-49e2-8710-a229c9a8f36d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsDerivativeInstruments"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsDerivativeInstruments_e959640a-eadc-49e2-8710-a229c9a8f36d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_1b921017-138a-4282-b418-849c612e82dc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsOther"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_1b921017-138a-4282-b418-849c612e82dc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nnbr_DeferredTaxAssetInterestExpenseLimitation_f93ff9a6-f586-4987-866e-0a9a03d04341" xlink:href="nnbr-20251231.xsd#nnbr_DeferredTaxAssetInterestExpenseLimitation"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_nnbr_DeferredTaxAssetInterestExpenseLimitation_f93ff9a6-f586-4987-866e-0a9a03d04341" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment_3003ee35-cff5-47a3-bfc5-2ae150985622" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_63cd74ab-1c9d-4404-b82c-5ee8f15cdfe5" xlink:to="loc_us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment_3003ee35-cff5-47a3-bfc5-2ae150985622" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_268cf18e-e780-498b-a118-bdc808d770e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_851e8290-2cf5-4038-96ab-3ce6cd61fb4f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_268cf18e-e780-498b-a118-bdc808d770e3" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_851e8290-2cf5-4038-96ab-3ce6cd61fb4f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_8fac9234-1882-4ac6-8c64-d8da622a2796" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_268cf18e-e780-498b-a118-bdc808d770e3" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_8fac9234-1882-4ac6-8c64-d8da622a2796" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/EarningsPerShareDetails" xlink:type="simple" xlink:href="nnbr-20251231.xsd#EarningsPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/EarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cb166-e776-7d5f-bf70-a0574e3da538" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesIssuedBasic_019cb166-e777-7fcb-88ab-5b4aa105b78a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesIssuedBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cb166-e776-7d5f-bf70-a0574e3da538" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesIssuedBasic_019cb166-e777-7fcb-88ab-5b4aa105b78a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesRestrictedStock_019cb166-e777-7b3e-b8ef-81cd30070c3f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesRestrictedStock"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cb166-e776-7d5f-bf70-a0574e3da538" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesRestrictedStock_019cb166-e777-7b3e-b8ef-81cd30070c3f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesContingentlyIssuable_019cb166-e777-7ed1-89d7-6e51f2620529" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesContingentlyIssuable"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cb166-e776-7d5f-bf70-a0574e3da538" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesContingentlyIssuable_019cb166-e777-7ed1-89d7-6e51f2620529" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersBasic_019cb15e-1b4d-7bda-9aec-3eb0985c196c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cb15e-1b4d-7037-a460-e7d8dead6de2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersBasic_019cb15e-1b4d-7bda-9aec-3eb0985c196c" xlink:to="loc_us-gaap_NetIncomeLoss_019cb15e-1b4d-7037-a460-e7d8dead6de2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_019cb15e-1b4d-7903-9503-5daf14007748" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PreferredStockDividendsAndOtherAdjustments"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersBasic_019cb15e-1b4d-7bda-9aec-3eb0985c196c" xlink:to="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_019cb15e-1b4d-7903-9503-5daf14007748" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersDiluted_019cb15e-4e8d-72d1-ace0-7888ba13cb30" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersDiluted"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cb15e-4e8d-7ed7-8e8e-b54879d58b2d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersDiluted_019cb15e-4e8d-72d1-ace0-7888ba13cb30" xlink:to="loc_us-gaap_NetIncomeLoss_019cb15e-4e8d-7ed7-8e8e-b54879d58b2d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_019cb15e-4e8d-77e2-b5bb-e06f87dd6498" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PreferredStockDividendsAndOtherAdjustments"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersDiluted_019cb15e-4e8d-72d1-ace0-7888ba13cb30" xlink:to="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_019cb15e-4e8d-77e2-b5bb-e06f87dd6498" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cb166-cb0e-7649-9321-0621866817e5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesIssuedBasic_019cb166-cb0e-7eac-b0de-2dc7a473659b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesIssuedBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cb166-cb0e-7649-9321-0621866817e5" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesIssuedBasic_019cb166-cb0e-7eac-b0de-2dc7a473659b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesRestrictedStock_019cb166-cb0e-776f-8e68-dc9f27b2534b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesRestrictedStock"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cb166-cb0e-7649-9321-0621866817e5" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesRestrictedStock_019cb166-cb0e-776f-8e68-dc9f27b2534b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesContingentlyIssuable_019cb166-cb0e-7baa-9afa-0eaaf546ca86" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesContingentlyIssuable"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cb166-cb0e-7649-9321-0621866817e5" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesContingentlyIssuable_019cb166-cb0e-7baa-9afa-0eaaf546ca86" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nninc.com/role/AccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" xlink:href="nnbr-20251231.xsd#AccumulatedOtherComprehensiveIncomeDetails"/>
  <link:calculationLink xlink:role="http://www.nninc.com/role/AccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_fc6858be-92e4-4aa7-9e20-980bc8538da0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_0cfe2140-ef21-4de0-994f-4578d55d35cd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_fc6858be-92e4-4aa7-9e20-980bc8538da0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax_0cfe2140-ef21-4de0-994f-4578d55d35cd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_ac597582-b7fb-4c11-a13e-9df22636a659" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_fc6858be-92e4-4aa7-9e20-980bc8538da0" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_ac597582-b7fb-4c11-a13e-9df22636a659" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_ac75cec1-7b81-4779-a452-03a5d5748678" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_fc6858be-92e4-4aa7-9e20-980bc8538da0" xlink:to="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_ac75cec1-7b81-4779-a452-03a5d5748678" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_32c3a4aa-8ed2-4d5b-bbb2-536b0a953fff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_56f0b323-ac67-47d9-afc2-8ceddcfcf07a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_32c3a4aa-8ed2-4d5b-bbb2-536b0a953fff" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_56f0b323-ac67-47d9-afc2-8ceddcfcf07a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_eec7b1fb-b927-4d84-abaa-7252c14ea470" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_32c3a4aa-8ed2-4d5b-bbb2-536b0a953fff" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_eec7b1fb-b927-4d84-abaa-7252c14ea470" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax_248a34e5-ea0e-48f5-9cb8-f1b75e23b910" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_32c3a4aa-8ed2-4d5b-bbb2-536b0a953fff" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax_248a34e5-ea0e-48f5-9cb8-f1b75e23b910" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
