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  <xsd:element id="ait_InventoryAcquired" name="InventoryAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ait_InventoryPercentFromOneThousandNineHundredAndSeventysLifoLayers" name="InventoryPercentFromOneThousandNineHundredAndSeventysLifoLayers" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ait_KerpMember" name="KerpMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_KnoxAcquisitionMember" name="KnoxAcquisitionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_LeasesTextualsAbstract" name="LeasesTextualsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_NetAssetsAcquired" name="NetAssetsAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_NetIncomeImpactMember" name="NetIncomeImpactMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_NetSalesImpactMemberMember" name="NetSalesImpactMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_NumberOfLifoPoolsMaintained" name="NumberOfLifoPoolsMaintained" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_OperatingIncomeImpactMember" name="OperatingIncomeImpactMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_OtherAssetMember" name="OtherAssetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_OtherComprehensiveIncomeLossAbstract" name="OtherComprehensiveIncomeLossAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_OtherComprehensiveIncomeLossPostemploymentBenefitsNetofTaxBeforeReclassificationAdjustments" name="OtherComprehensiveIncomeLossPostemploymentBenefitsNetofTaxBeforeReclassificationAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ait_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainsLossesAndPriorServiceCostNetOfTax" name="OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainsLossesAndPriorServiceCostNetOfTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ait_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainsLossesAndPriorServiceCostTax" name="OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainsLossesAndPriorServiceCostTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_OtherCountriesDomain" name="OtherCountriesDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_OtherCurrentAssetsAcquired" name="OtherCurrentAssetsAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_OtherIncomeExpenseNetAbstract" name="OtherIncomeExpenseNetAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_OtherLiabilitiesAcquired" name="OtherLiabilitiesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ait_OtherNet" name="OtherNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ait_OtherShareBasedCompensation" name="OtherShareBasedCompensation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ait_Othercomprehensiveincomereclassificationofdefinedbenefitplansnetgainslossesandpriorservicecostbeforetax" name="Othercomprehensiveincomereclassificationofdefinedbenefitplansnetgainslossesandpriorservicecostbeforetax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_OthersecuritiesMember" name="OthersecuritiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_PercentageOfDefinedContributionPlanByPlanParticipants" name="PercentageOfDefinedContributionPlanByPlanParticipants" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_PlanCurtailmentAxis" name="PlanCurtailmentAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_PlanCurtailmentDomain" name="PlanCurtailmentDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_ProFormaOperatingIncome" name="ProFormaOperatingIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ait_PropertyAcquired" name="PropertyAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_PropertyandEquipmentMaximumUsefulLifeMemberMember" name="PropertyandEquipmentMaximumUsefulLifeMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_PropertyandEquipmentMinimumUsefulLifeMemberMember" name="PropertyandEquipmentMinimumUsefulLifeMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_PrudentialFacilityMember" name="PrudentialFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_PrudentialFacilitySeriesCMember" name="PrudentialFacilitySeriesCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_PrudentialFacilitySeriesDMember" name="PrudentialFacilitySeriesDMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_RelianceAcquisitionMember" name="RelianceAcquisitionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_ReportingUnitAxis" name="ReportingUnitAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_ReportingUnitDomain" name="ReportingUnitDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_RestrictedStockAndRestrictedStockUnitsMember" name="RestrictedStockAndRestrictedStockUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_RodensaGSBIraAcquisitionMemberMember" name="RodensaGSBIraAcquisitionMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_SERPCurtailmentMember" name="SERPCurtailmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesAbstract" name="ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_ScheduleOfPurchasePriceAllocationAndAssociatedWeightedAverageLifeTableTextBlock" name="ScheduleOfPurchasePriceAllocationAndAssociatedWeightedAverageLifeTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_ScheduleOfSegmentReportingInformationBySegmentAbstract" name="ScheduleOfSegmentReportingInformationBySegmentAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_ScheduleOfShareBasedCompensationOtherThanStockOptionsActivityTableTextBlock" name="ScheduleOfShareBasedCompensationOtherThanStockOptionsActivityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_ScheduleOfUnrecognizedCompensationCostNonvestedAwardsTableTextBlockLineItems" name="ScheduleOfUnrecognizedCompensationCostNonvestedAwardsTableTextBlockLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_ScheduleOfUnrecognizedCompensationCostNonvestedAwardsTableTextBlockTable" name="ScheduleOfUnrecognizedCompensationCostNonvestedAwardsTableTextBlockTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_SegmentAndGeographicInformationTextualsAbstract" name="SegmentAndGeographicInformationTextualsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedAbstract" name="SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_SelfInsuranceLiabilitiesPolicyTextBlock" name="SelfInsuranceLiabilitiesPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_ServiceCenterBasedDistributionSegmentMember" name="ServiceCenterBasedDistributionSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumberOfSharesRollForward" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumberOfSharesRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndStockAppreciationRightsVestedAndExpectedToVestExercisableAverageContractualTerm" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndStockAppreciationRightsVestedAndExpectedToVestExercisableAverageContractualTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceSharesExercisesInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceSharesExercisesInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_ShareholdersEquityDetailsAbstract" name="ShareholdersEquityDetailsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_ShareholdersEquityTextualsAbstract" name="ShareholdersEquityTextualsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_StatementsOfComprehensiveIncomeAbstract" name="StatementsOfComprehensiveIncomeAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_StateofOhioAssumedDebtMember" name="StateofOhioAssumedDebtMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_StockIssuedDuringPeriodPerformanceShares" name="StockIssuedDuringPeriodPerformanceShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_StockOptionsAndStockAppreciationRightsMember" name="StockOptionsAndStockAppreciationRightsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_TermLoanMember" name="TermLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_TotalAssetsAcquired" name="TotalAssetsAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ait_TotalPurchasePrice" name="TotalPurchasePrice" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ait_TreasurySharesIssuedForAbstract" name="TreasurySharesIssuedForAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_TreasurySharesRestrictedAsCollateralUnderEscrow" name="TreasurySharesRestrictedAsCollateralUnderEscrow" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="ait_UndistributedEarningsOfForeignSubsidiariesOnWhichNoProvisionHasBeenMadeForIncomeTaxes" name="UndistributedEarningsOfForeignSubsidiariesOnWhichNoProvisionHasBeenMadeForIncomeTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ait_UnrealizedGainLossesOnAssetsHeldUnderTrustForNonqualifiedDeferredCompensationPlan" name="UnrealizedGainLossesOnAssetsHeldUnderTrustForNonqualifiedDeferredCompensationPlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ait_UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions" name="UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ait_VendorRelationshipsMember" name="VendorRelationshipsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ait_WorkingCapitalAdjustments" name="WorkingCapitalAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
</xsd:schema>
