What are Material Conditions MMC LMC | DCS GD&T

LMC Least Material Condition is defined as the condition in which there is the least amount of material, the largest hole or smallest pin, within the stated ... Solutions DimensionalManagement ToleranceAnalysis WhatisToleranceAnalysis? 1Dvs2Dvs3DToleranceStacks UnderstandingWorstCase UnderstandingGD&T WhatisGD&T? ValueofGD&T? MaterialModifiersandConditions CommonGD&TSymbols StatisticalProcessControlSPC WhatisSPC? SPCforAutomotiveOEMs SPCforAutomotiveSuppliers SPCforMachineShops SupplierQualityAssuranceSQA ClosedLoopQualityIntelligence ArticlesandWhitepapers Videos Understanding3DCS-VideoSeries 3DCSFeatures-Videos QDMSPCVideos DCSWebinars WebinarSeries2019and2020 UpcomingWebinars WebinarRecordingsOn-Demand Industries Automotive DaimlerMercedesBenz Hella JaguarLandRover Mahindra Valeo Aerospace AIRBUS BOMBARDIER EMBRAER MedicalDevice PhilipsMedical High-TechElectronics Energy ITERFusionReactor Software What'sNewinLatestVersion-QDM&3DCS 3DCSToleranceAnalysisSoftware 3DCSScalableSolution 3DCSViewer-View3DCSModels 3DCSDVMDesignVariationModeler-Easy3DStackTool 3DCSMVMMechanicalVariationModeler-Kinematic3DStackTool 3DCSVAVariationAnalyst-AdvancedToolset 3DCSVAVariationAnalyst-CompleteToolset 3DCSVA-CATIAV5Integrated 3DCSVA-CATIAV63DEXPERIENCEIntegrated 3DCSVA-NXIntegrated 3DCSVA-SOLIDWORKSIntegrated 3DCSVA-CREOIntegrated 3DCSVAMulti-CAD-StandaloneToleranceStacks 3DCSVAforAutodeskINVENTOR 3DCSAdd-onModules FEACompliantModeler-FiniteElementAnalysis MechanicalModeler-JointsandConstraints AAO-AdvancedAnalyzerandOptimizer VisualizationExport-PerceivedQuality QDMSPCQualitySystems Overview QDMAnalystReportMaker QDMWEB(SiteorCloud) SystemDeployments InspectionLab(BASIC) PlantLevel(SINGLEPLANT) EnterpriseLevel(MULTIPLEPLANTS) QDMModules QDMAnalyst-TemplateMaker QDMPDA-AdvAnalysis QDMGateway-FoundationDatabase QDMDataEntryPortal-ManualInputs QDMSatelliteStation-Real-TimeMonitors QDMDatagrabber-AutomateCollection QDMSQA-SupplierQuality DownloadDCSSoftware Support SupportRequest DimensionalAnalysis&ModelingServices 3DCS&QDMTraining GD&TTrainingandConsulting QualityManagementConsulting TrainingLabSupplementalLearning DCSCommunity-FAQandForums Careers FindTalentforYourCompany SearchJobOpenings CareerswithDCS EngineeringStaffing Company AboutDCS IndustryPartners Events SocialMedia Contact ContactDCSHQ(USA) GlobalDistributors APACPartners-Asia|Pacific EMEAPartners-Europe|MiddleEast SouthAmericaPartners JoinDCSNewsletter Solutions DimensionalManagement ToleranceAnalysis WhatisToleranceAnalysis? 1Dvs2Dvs3DToleranceStacks UnderstandingWorstCase UnderstandingGD&T WhatisGD&T? ValueofGD&T? MaterialModifiersandConditions CommonGD&TSymbols StatisticalProcessControlSPC WhatisSPC? SPCforAutomotiveOEMs SPCforAutomotiveSuppliers SPCforMachineShops SupplierQualityAssuranceSQA ClosedLoopQualityIntelligence ArticlesandWhitepapers Videos Understanding3DCS-VideoSeries 3DCSFeatures-Videos QDMSPCVideos DCSWebinars WebinarSeries2019and2020 UpcomingWebinars WebinarRecordingsOn-Demand Industries Automotive DaimlerMercedesBenz Hella JaguarLandRover Mahindra Valeo Aerospace AIRBUS BOMBARDIER EMBRAER MedicalDevice PhilipsMedical High-TechElectronics Energy ITERFusionReactor Software What'sNewinLatestVersion-QDM&3DCS 3DCSToleranceAnalysisSoftware 3DCSScalableSolution 3DCSViewer-View3DCSModels 3DCSDVMDesignVariationModeler-Easy3DStackTool 3DCSMVMMechanicalVariationModeler-Kinematic3DStackTool 3DCSVAVariationAnalyst-AdvancedToolset 3DCSVAVariationAnalyst-CompleteToolset 3DCSVA-CATIAV5Integrated 3DCSVA-CATIAV63DEXPERIENCEIntegrated 3DCSVA-NXIntegrated 3DCSVA-SOLIDWORKSIntegrated 3DCSVA-CREOIntegrated 3DCSVAMulti-CAD-StandaloneToleranceStacks 3DCSVAforAutodeskINVENTOR 3DCSAdd-onModules FEACompliantModeler-FiniteElementAnalysis MechanicalModeler-JointsandConstraints AAO-AdvancedAnalyzerandOptimizer VisualizationExport-PerceivedQuality QDMSPCQualitySystems Overview QDMAnalystReportMaker QDMWEB(SiteorCloud) SystemDeployments InspectionLab(BASIC) PlantLevel(SINGLEPLANT) EnterpriseLevel(MULTIPLEPLANTS) QDMModules QDMAnalyst-TemplateMaker QDMPDA-AdvAnalysis QDMGateway-FoundationDatabase QDMDataEntryPortal-ManualInputs QDMSatelliteStation-Real-TimeMonitors QDMDatagrabber-AutomateCollection QDMSQA-SupplierQuality DownloadDCSSoftware Support SupportRequest DimensionalAnalysis&ModelingServices 3DCS&QDMTraining GD&TTrainingandConsulting QualityManagementConsulting TrainingLabSupplementalLearning DCSCommunity-FAQandForums Careers FindTalentforYourCompany SearchJobOpenings CareerswithDCS EngineeringStaffing Company AboutDCS IndustryPartners Events SocialMedia Contact ContactDCSHQ(USA) GlobalDistributors APACPartners-Asia|Pacific EMEAPartners-Europe|MiddleEast SouthAmericaPartners JoinDCSNewsletter Search Menu Solutions DimensionalManagement ToleranceAnalysis WhatisToleranceAnalysis? 1Dvs2Dvs3DToleranceStacks UnderstandingWorstCase UnderstandingGD&T WhatisGD&T? ValueofGD&T? MaterialModifiersandConditions CommonGD&TSymbols StatisticalProcessControlSPC WhatisSPC? SPCforAutomotiveOEMs SPCforAutomotiveSuppliers SPCforMachineShops SupplierQualityAssuranceSQA ClosedLoopQualityIntelligence ArticlesandWhitepapers Videos Understanding3DCS-VideoSeries 3DCSFeatures-Videos QDMSPCVideos DCSWebinars WebinarSeries2019and2020 UpcomingWebinars WebinarRecordingsOn-Demand Industries Automotive DaimlerMercedesBenz Hella JaguarLandRover Mahindra Valeo Aerospace AIRBUS BOMBARDIER EMBRAER MedicalDevice PhilipsMedical High-TechElectronics Energy ITERFusionReactor Software What'sNewinLatestVersion-QDM&3DCS 3DCSToleranceAnalysisSoftware 3DCSScalableSolution 3DCSViewer-View3DCSModels 3DCSDVMDesignVariationModeler-Easy3DStackTool 3DCSMVMMechanicalVariationModeler-Kinematic3DStackTool 3DCSVAVariationAnalyst-AdvancedToolset 3DCSVAVariationAnalyst-CompleteToolset 3DCSVA-CATIAV5Integrated 3DCSVA-CATIAV63DEXPERIENCEIntegrated 3DCSVA-NXIntegrated 3DCSVA-SOLIDWORKSIntegrated 3DCSVA-CREOIntegrated 3DCSVAMulti-CAD-StandaloneToleranceStacks 3DCSVAforAutodeskINVENTOR 3DCSAdd-onModules FEACompliantModeler-FiniteElementAnalysis MechanicalModeler-JointsandConstraints AAO-AdvancedAnalyzerandOptimizer VisualizationExport-PerceivedQuality QDMSPCQualitySystems Overview QDMAnalystReportMaker QDMWEB(SiteorCloud) SystemDeployments InspectionLab(BASIC) PlantLevel(SINGLEPLANT) EnterpriseLevel(MULTIPLEPLANTS) QDMModules QDMAnalyst-TemplateMaker QDMPDA-AdvAnalysis QDMGateway-FoundationDatabase QDMDataEntryPortal-ManualInputs QDMSatelliteStation-Real-TimeMonitors QDMDatagrabber-AutomateCollection QDMSQA-SupplierQuality DownloadDCSSoftware Support SupportRequest DimensionalAnalysis&ModelingServices 3DCS&QDMTraining GD&TTrainingandConsulting QualityManagementConsulting TrainingLabSupplementalLearning DCSCommunity-FAQandForums Careers FindTalentforYourCompany SearchJobOpenings CareerswithDCS EngineeringStaffing Company AboutDCS IndustryPartners Events SocialMedia Contact ContactDCSHQ(USA) GlobalDistributors APACPartners-Asia|Pacific EMEAPartners-Europe|MiddleEast SouthAmericaPartners JoinDCSNewsletter UnderstandingMaterialConditions-MMC&LMC UnderstandingMaterialModifiers-Conditions [AllmaterialreferencedfromDCSGD&TTrainingManual] Materialmodifiershelpthedesignertobetterdescribewhatisdimensionallyacceptablebyprovidinginsightintoadditionaltolerancescausedbythepresenceorabsenceofmaterialonapartorfeature.  WhatareMaterialModifiers? BonusTolerance-AstheactualsizeofafeaturedepartsfromMMC,thedeparturevaluecanbeaddedtothegeometrictolerance Rule#1-PerfectformatMMC Rule#2-Unlessotherwisespecified,RFSappliestofeaturesofsize VirtualCondition-CollectiveeffectsofafeatureatMMCandtheappliedgeometricaltolerance–ExternalFeature-FeatureMMC+GeoTol–InternalFeature-FeatureMMC-GeoTol TIPStoRemember:  WhenRFSisappliedthegeometricaltoleranceisindependentofthefeaturesize WhenLMCorMMCareappliedthetotaltoleranceisDEPENDENTonthefeaturesize LMCisprimarilyusedwhenconcernedwithwallthickness WhatareMaterialModifiers? MaterialModifiers provideoneofthreecalloutsthatdescribewhetherafeaturecontainsthemaximumorminimumamountofmaterialwhenfabricated,thusaffectingtheoveralltoleranceofthefeature. MMC-MaximumMaterialCondition    LMC-LeastMaterialCondition   RFS-RegardlessofFeatureofSize Definitions:  MMC-MaximumMaterialCondition  MMCMaximumMaterialConditionisdefinedastheconditionofafeaturewhichcontainsthemaximumamountofmaterial,thatis,thesmallestholeorlargestpin,withinthestatedlimitsofsize.  --EffectofMMCMaximumMaterialCondition WhereageometrictoleranceisappliedonanMMCbasis,theallowedtoleranceisdependentontheactualmatingsizeoftheconsideredfeature.ThetoleranceislimitedtothespecifiedvalueifthefeatureisproducedatitsMMClimitofsize.WheretheactualmatingsizeofthefeaturehasdepartedfromMMC,anincreaseinthetoleranceisallowedequaltotheamountofsuchdeparture.ThetotalpermissiblevariationinthespecificgeometriccharacteristicismaximumwhenthefeatureisatLMC.Likewise,referencingadatumfeatureonanMMCbasismeansthedatumistheaxisorcenterplaneofthefeatureattheMMClimit.WheretheactualmatingsizeenvelopehasdepartedfromMMC,adeviationisallowedbetweenitsaxisorcenterplaneandtheaxisorcenterplaneofthedatum. --EffectofZeroToleranceatMMCMaximumMaterialCondition WhereatoleranceofpositionororientationisappliedonazerotoleranceatMMCbasis,thetoleranceistotallydependantontheactualmatingsizeoftheconsideredfeature.NotoleranceofpositionororientationisallowedifthefeatureisproducedatitsMMClimitofsize;andinthiscase,itmustbelocatedattruepositionorbeperfectinorientation,asapplicable.WheretheactualmatingsizeoftheconsideredfeaturehasdepartedfromMMC,atoleranceisallowedequaltotheamountofsuchdeparture.ThetotalpermissiblevariationinpositionororientationismaximumwhenitsfeatureisatLMC,unlessamaximumisspecified. LMC-LeastMaterialCondition  LMCLeastMaterialConditionisdefinedastheconditioninwhichthereistheleastamountofmaterial,thelargestholeorsmallestpin,withinthestatedlimitsofsize. --EffectofLMCLeastMaterialCondition WhereapositionaltoleranceisappliedonanLMCbasis,theallowedtoleranceisdependentontheactualmatingsizeoftheconsideredfeature.ThetoleranceislimitedtothespecifiedvalueifthefeatureisproducedatitsLMClimitofsize.WheretheactualmatingsizeofthefeaturehasdepartedfromLMC,anincreaseinthetoleranceisallowedequaltotheamountofsuchdeparture.ThetotalpermissiblevariationinpositionismaximumwhenthefeatureisatMMC.Likewise,referencingadatumfeatureonanLMCbasismeansthedatumistheaxisorcenterplaneofthefeatureattheLMClimit.WheretheactualmatingsizeofthedatumfeaturehasdepartedfromLMC,adeviationisallowedbetweenitsaxisorcenterplaneandtheaxisorcenterplaneofthedatum. RFS-RegardlessofFeatureofSize(default) RFSRegardlessofFeatureSize isthedefaultconditionofallgeometrictolerancesbyrule#2ofGD&Tandrequiresnocallout. Regardlessoffeaturesize simplymeansthatwhateverGD&Tcalloutyoumake,iscontrolledindependentlyofthesizedimensionofthepart. --EffectofRFSRegardlessofFeatureofSize WhereageometrictoleranceisappliedonanRFSbasis,thespecifiedtoleranceisindependentoftheactualsizeoftheconsideredfeature.Thetoleranceislimitedtothespecifiedvalueregardlessoftheactualsizeofthefeature.Likewise,referencingadatumfeatureonanRFSbasismeansthatacenteringaboutitsaxisorcenterplaneisnecessary,regardlessoftheactualsizeofthefeature. WhyUseMaterialConditionsLikeMMC? MMCdefinestheworstcaseconditionofapartthatwillstillguarantee,becauseitisstillwithintheprescribedtolerances,theassemblybetweenpin(s)andhole(s).Whenaholeisatitssmallest(MMC)andapinisatitslargestcondition(alsoMMC),wecanbesurethatwewillstillbeabletoassemblethatpart.Thus,MMCiswidelyusedincaseswhereclearancefitsarecommon. Introduction-ApplicabilityofModifiers AllApplicableGeometricTolerances(Rule#2).RFSapplies,withrespecttotheindividualtolerance,datumreference,orboth,wherenomodifyingsymbolisspecified.MMCorLMCmustbespecifiedonthedrawingwhereitisrequired.   WhatisBonusTolerance? AsthesizeofthepindepartsfromMMCtowardLMC,abonustoleranceisaddedequaltotheamountofchange.BonustoleranceequalsthedifferencebetweentheactualfeaturesizeandtheMMCofthefeature.  BonusTolerance=MMC-LMC   The2RulesofMaterialConditions  Rule#1INDIVIDUALFEATURESOFSIZE Whereonlyatoleranceofsizeisspecified,thelimitsofsizeofanindividualfeatureprescribetheextenttowhichvariationsinitsgeometricform,aswellassize,areallowed. BoundaryofPerfectFormatMMC-ExternalFeatureofSize BoundaryofPerfectFormatMMC-InternalFeatureofSize Rule#2AllApplicableGeometricTolerances RFSapplies,withrespecttotheindividualtolerance,datumreference,orboth,wherenomodifyingsymbolisspecified.MMCorLMCmustbespecifiedonthedrawingwhereitisrequired. TolerancesofPosition-RFSisImplied      UnderstandingVirtualCondition VirtualConditionisdefinedastheboundarygeneratedbythecollectiveeffectsofthespecifiedMMClimitofsizeofafeatureandanyapplicablegeometrictolerance.Forexample,theMMCsizeofashaftplusitsaxialStraightnesstolerance,ortheMMCsizeofaholeminusitsPositiontolerance. ExternalFeatureExample-VirtualCondition InternalFeatureExample-VirtualCondition VirtualCondition-PossibleDeviation UsingGD&TGeometricDimensioningandTolerancing  GD&TisappliedusingsymbolsandDatums.Clickbelowtoseecommonsymbols,andtobetterunderstandDatumsandMaterialConditions CommonGD&TSymbols LearnAboutUsingCommonGD&TSymbols WhatisGD&T? LearnaboutGD&T ValueofGD&T LearnabouttheValueandROIofGD&T WhereDoYouStartwithGD&T? 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