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        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element id="twin_AmortizationOfIntangibleAssetsAndInterestExpenseOfLongTermDebtTotal" name="AmortizationOfIntangibleAssetsAndInterestExpenseOfLongTermDebtTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_AmortizationOfInventoryFairValueStepUp" name="AmortizationOfInventoryFairValueStepUp" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_AnnuityContractsMember" name="AnnuityContractsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_BMOMember" name="BMOMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_BankOfMontrealMember" name="BankOfMontrealMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_BusinessAcquisitionProFormaGrossProfit" name="BusinessAcquisitionProFormaGrossProfit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="twin_BusinessAcquisitionProFormaInformationActualTableTextBlock" name="BusinessAcquisitionProFormaInformationActualTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingBasic" name="BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingBasic" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingDiluted" name="BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingDiluted" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_BusinessCombinationProFormaInformationGrossProfitOfAcquireeSinceAcquisitionDateActual" name="BusinessCombinationProFormaInformationGrossProfitOfAcquireeSinceAcquisitionDateActual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="twin_BusinessCombinationProFormaInformationOperatingIncomeLossOfAcquireeSinceAcquisitionDateActual" name="BusinessCombinationProFormaInformationOperatingIncomeLossOfAcquireeSinceAcquisitionDateActual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_CommonStockHeldByUsPensionPlansMember" name="CommonStockHeldByUsPensionPlansMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_CompanyCommonStockMember" name="CompanyCommonStockMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_CompensationExpenseAndWindfallTaxBenefits" name="CompensationExpenseAndWindfallTaxBenefits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_Customer1Member" name="Customer1Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_DebtAgreementMaximumBorrowingCapacity" name="DebtAgreementMaximumBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DebtInstrumentCollateralPercentOfLetterOfCreditObligationUponOccurrenceOfAnEventDefault" name="DebtInstrumentCollateralPercentOfLetterOfCreditObligationUponOccurrenceOfAnEventDefault" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_DebtInstrumentCovenantFundedDebtToEBITDARatio" name="DebtInstrumentCovenantFundedDebtToEBITDARatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_DebtInstrumentCovenantMinimumTangibleNetWorthPlusHalfOfNetIncome" name="DebtInstrumentCovenantMinimumTangibleNetWorthPlusHalfOfNetIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DebtInstrumentPercentageOfEquityInterestInCertainDomesticSubsidiaries" name="DebtInstrumentPercentageOfEquityInterestInCertainDomesticSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_DebtInstrumentPercentageOfEquityInterestInCertainForeignSubsidiaries" name="DebtInstrumentPercentageOfEquityInterestInCertainForeignSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_DeferredTaxAssetsLeasesRightofuseAssets" name="DeferredTaxAssetsLeasesRightofuseAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DeferredTaxAssetsTaxCreditCarryforwardsFederal" name="DeferredTaxAssetsTaxCreditCarryforwardsFederal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanAmortizationOfTransitionAssetAndPriorServiceBenefit" name="DefinedBenefitPlanAmortizationOfTransitionAssetAndPriorServiceBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationExpectedReturnPlanAssets" name="DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationExpectedReturnPlanAssets" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanCostOfPremiumForHealthCoveragePlanPercentage" name="DefinedBenefitPlanCostOfPremiumForHealthCoveragePlanPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsFiveFiscalYearsThereafter" name="DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsFiveFiscalYearsThereafter" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsNextTwelveMonths" name="DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsNextTwelveMonths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsYearFive" name="DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsYearFive" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsYearFour" name="DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsYearFour" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsYearThree" name="DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsYearThree" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsYearTwo" name="DefinedBenefitPlanExpectedFutureGrossBenefitPaymentsYearTwo" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanExpectedLongtermReturnOnPlanAssets" name="DefinedBenefitPlanExpectedLongtermReturnOnPlanAssets" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanInterestCostEndOfPeriodFxRate" name="DefinedBenefitPlanInterestCostEndOfPeriodFxRate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_DefinedBenefitPlanPercentageOfDecreaseInAssumedHealthcareCostTrendRate" name="DefinedBenefitPlanPercentageOfDecreaseInAssumedHealthcareCostTrendRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanPercentageOfIncreaseInAssumedHealthcareCostTrendRate" name="DefinedBenefitPlanPercentageOfIncreaseInAssumedHealthcareCostTrendRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanProjectedAndAccumulatedBenefitObligation" name="DefinedBenefitPlanProjectedAndAccumulatedBenefitObligation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="twin_DefinedBenefitPlanServiceCostEndOfPeriodFxRate" name="DefinedBenefitPlanServiceCostEndOfPeriodFxRate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_DefinedBenefitPlanWeightedAverageHealthcareCostTrendRate" name="DefinedBenefitPlanWeightedAverageHealthcareCostTrendRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_DisposalGroupIncludingDiscontinuedOperationConsiderationReceivable" name="DisposalGroupIncludingDiscontinuedOperationConsiderationReceivable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="twin_DistributionSegmentMember" name="DistributionSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_EffectiveIncomeTaxRateReconciliationDeductionExecutiveCompensationAmount" name="EffectiveIncomeTaxRateReconciliationDeductionExecutiveCompensationAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_EffectiveIncomeTaxRateReconciliationDeductionFdiiAmount" name="EffectiveIncomeTaxRateReconciliationDeductionFdiiAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="twin_EffectiveIncomeTaxRateReconciliationDeferredTaxBasisAdjustmentAmount" name="EffectiveIncomeTaxRateReconciliationDeferredTaxBasisAdjustmentAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_EffectiveIncomeTaxRateReconciliationGiltiAmount" name="EffectiveIncomeTaxRateReconciliationGiltiAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_EffectiveIncomeTaxRateReconciliationSharebasedCompensationAmount" name="EffectiveIncomeTaxRateReconciliationSharebasedCompensationAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_EngineeringAndDevelopmentCosts" name="EngineeringAndDevelopmentCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_EuropeanIndustrialMember" name="EuropeanIndustrialMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_EuropeanPropulsionMember" name="EuropeanPropulsionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_FiniteLivedIntangibleAssetsAcquiredGross" name="FiniteLivedIntangibleAssetsAcquiredGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLossAccumulatedAmortization" name="FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLossAccumulatedAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLossGross" name="FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLossGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="twin_FinitelivedIntangibleAssetsAcquiredOther" name="FinitelivedIntangibleAssetsAcquiredOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_FinitelivedIntangibleAssetsOtherAdditionsGross" name="FinitelivedIntangibleAssetsOtherAdditionsGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_GoodwillMeasurementInput" name="GoodwillMeasurementInput" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="twin_IncentiveStockOptionsMember" name="IncentiveStockOptionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_IndustrialMember" name="IndustrialMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_InterSegmentSalesRevenueNet" name="InterSegmentSalesRevenueNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="twin_IntraSegmentSalesRevenueNet" name="IntraSegmentSalesRevenueNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_InvestmentsMeasuredAtNetAssetValueEquitySecuritiesMember" name="InvestmentsMeasuredAtNetAssetValueEquitySecuritiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_InvestmentsMeasuredAtNetAssetValueFixedIncomeFundsMember" name="InvestmentsMeasuredAtNetAssetValueFixedIncomeFundsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_InvestmentsMeasuredAtNetAssetValueHedgeFundsMember" name="InvestmentsMeasuredAtNetAssetValueHedgeFundsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_InvestmentsMeasuredAtNetAssetValueRealEstateMember" name="InvestmentsMeasuredAtNetAssetValueRealEstateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_LandBasedTransmissionsMember" name="LandBasedTransmissionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_LeaseCostBeforeSubleaseIncome" name="LeaseCostBeforeSubleaseIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_LongtermIncentiveCompensationPlan2010Member" name="LongtermIncentiveCompensationPlan2010Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_ManufacturingSegmentMember" name="ManufacturingSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_MarineAndPropulsionSystemsMember" name="MarineAndPropulsionSystemsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_MillLogBusinessMember" name="MillLogBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_NonqualifiedStockOptionsMember" name="NonqualifiedStockOptionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_NumberOfCustomers" name="NumberOfCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_OperatingAndFinanceLeasesOtherDisclosuresTableTextBlock" name="OperatingAndFinanceLeasesOtherDisclosuresTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_OtherCountriesMember" name="OtherCountriesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_OtherLongtermDebtMember" name="OtherLongtermDebtMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_OtherMember" name="OtherMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_PaymentsOfStockOfferingExpenses" name="PaymentsOfStockOfferingExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="twin_PaymentsOfStockUnderwritingCosts" name="PaymentsOfStockUnderwritingCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="twin_PercentageOfCombinedVotingPowerOfStockOwnedByOptionee" name="PercentageOfCombinedVotingPowerOfStockOwnedByOptionee" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_PercentageOfGrantDateFairMarketValueSpecifiedAsPriceOfIncentiveStockOptionsBasedOnConditionMinimum" name="PercentageOfGrantDateFairMarketValueSpecifiedAsPriceOfIncentiveStockOptionsBasedOnConditionMinimum" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_PercentageOfOptionsVestedOnAdoptionOfStatement" name="PercentageOfOptionsVestedOnAdoptionOfStatement" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="twin_PerformanceStockAwardsMember" name="PerformanceStockAwardsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_PrincipalPaidOnSaleLeasebackLiabilities" name="PrincipalPaidOnSaleLeasebackLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_PriorParentOfVethPropulsionMember" name="PriorParentOfVethPropulsionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_ProceedsFromSaleLeasebackAgreement" name="ProceedsFromSaleLeasebackAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="twin_ReconciliationForTheChangesInAccumulatedOtherComprehensiveIncomeLossNetOfTaxByComponentTabletextblock" name="ReconciliationForTheChangesInAccumulatedOtherComprehensiveIncomeLossNetOfTaxByComponentTabletextblock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_ReconciliationOfRevenueAndOperatingProfitLossFromSegmentsToConsolidatedTableTextBlock" name="ReconciliationOfRevenueAndOperatingProfitLossFromSegmentsToConsolidatedTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_RevolvingLoanMember" name="RevolvingLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_SaleLeasebackTransactionsImpliedInterestRate" name="SaleLeasebackTransactionsImpliedInterestRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="twin_SaleLeasebackTransactionsTerm" name="SaleLeasebackTransactionsTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_ScheduleOfBusinessAcquisitionsByAcquisitionConsiderationTransferredTableTextBlock" name="ScheduleOfBusinessAcquisitionsByAcquisitionConsiderationTransferredTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesAndFinanceLeaseLiabilityMaturityTableTextBlock" name="ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesAndFinanceLeaseLiabilityMaturityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_ScheduleOfPlanWeightedAverageAssetsAllocationsTableTextBlock" name="ScheduleOfPlanWeightedAverageAssetsAllocationsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_ScheduleOfSharebasedCompensationSharesAvailableForFutureOptionsTableTextBlock" name="ScheduleOfSharebasedCompensationSharesAvailableForFutureOptionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_SharesAcquiredIssuedNet" name="SharesAcquiredIssuedNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="twin_ShippingAndHandlingFeesAndCostsPolicyTextBlock" name="ShippingAndHandlingFeesAndCostsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="twin_ShortTermLeaseCostReclassification" name="ShortTermLeaseCostReclassification" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_StockIncentivePlanForNonemployeeDirectors2004Member" name="StockIncentivePlanForNonemployeeDirectors2004Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_StockIncentivePlanForNonemployeeDirectors2010Member" name="StockIncentivePlanForNonemployeeDirectors2010Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_StockOptionsMember" name="StockOptionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
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  <xsd:element abstract="true" id="twin_statement-statement-note-m-stockbased-compensation-shares-available-for-future-options-details" name="statement-statement-note-m-stockbased-compensation-shares-available-for-future-options-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
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  <xsd:element abstract="true" id="twin_statement-statement-note-o-pension-and-other-postretirement-benefit-plans-amounts-in-accumulated-other-comprehensive-income-loss-to-be-recognized-over-next-fiscal-year-details" name="statement-statement-note-o-pension-and-other-postretirement-benefit-plans-amounts-in-accumulated-other-comprehensive-income-loss-to-be-recognized-over-next-fiscal-year-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
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  <xsd:element abstract="true" id="twin_statement-statement-note-r-restructuring-of-operations-and-other-operating-income-rollforward-of-restructuring-activity-details" name="statement-statement-note-r-restructuring-of-operations-and-other-operating-income-rollforward-of-restructuring-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_statement-statement-note-r-restructuring-of-operations-and-other-operating-income-tables" name="statement-statement-note-r-restructuring-of-operations-and-other-operating-income-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_statement-statement-note-s-earnings-per-share-components-of-basic-and-diluted-earnings-per-share-details" name="statement-statement-note-s-earnings-per-share-components-of-basic-and-diluted-earnings-per-share-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_statement-statement-note-s-earnings-per-share-tables" name="statement-statement-note-s-earnings-per-share-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_statement-statement-note-t-derivative-financial-instruments-fair-value-of-derivative-instruments-details" name="statement-statement-note-t-derivative-financial-instruments-fair-value-of-derivative-instruments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_statement-statement-note-t-derivative-financial-instruments-impact-of-the-companys-derivative-instruments-on-the-consolidated-statement-of-operations-and-comprehensive-income-details" name="statement-statement-note-t-derivative-financial-instruments-impact-of-the-companys-derivative-instruments-on-the-consolidated-statement-of-operations-and-comprehensive-income-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_statement-statement-note-t-derivative-financial-intruments-tables" name="statement-statement-note-t-derivative-financial-intruments-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_statement-statement-schedule-ii-valuation-and-qualifying-accounts-tables" name="statement-statement-schedule-ii-valuation-and-qualifying-accounts-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_statement-statement-schedule-ii-valuation-and-qualifying-accounts-valuation-and-qualifying-accounts-details" name="statement-statement-schedule-ii-valuation-and-qualifying-accounts-valuation-and-qualifying-accounts-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="twin_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
