ASME Y14.43-2011 Dimensioning and Tolerancing Principles for Gages and Fixtures原版完整文件

ASMEY14.43-2011[RevisionofASMEY14.43-2003(R2008)]andASMEY14.43-2011[RevisionofASMEY14.43-2003(R2008)]EngineeringDrawingandRelatedDocumentationPracticesANAMERICANNATIONALSTANDARDASMEY14.43ADOPTIONNOTICEASMEY14.43,DimensioningandTolerancingPrinciplesforGagesandFixtures,wasadoptedon28JanuaryforusebytheDepartmentofDefense(DoD).ProposedchangesbyDoDactivitiesmustbesubmittedtotheDoDAdoptingActivity:Commander,U.S.ArmyResearch,DevelopmentandEngineeringCenter(ARDEC),RDAR-QES-E,PicatinnyArsenal,NJ07806-5000.CopiesofthisdocumentbepurchasedfromTheAmericanSocietyofMechanicalEngineers(ASME),22LawDrive,Box2900,Fairfield,NJ07007-2900,.Custodians: AdoptingActivity:Army—AR Army—ARNavy—SAAirForce—16 (ProjectDRPR-2010-001)DLA—DHReviewerActivities:Army—CR,MI,PT,TMNavy—AS,CG,CH,EC,MC,NP,TDAirForce—13,99DLA—ISOther—MP,NSNOTE:Theactivitieslistedabovewereinterestedinthisdocumentasofthedateofthisdocument.Sinceorganizationsandresponsibilitiescanchange,youverifythecurrencyoftheinformationaboveusingtheASSISTOnlinedatabaseat.AMSCFSCDRPRDISTRIBUTIONSTATEMENTA.Approvedforpublicrelease,distributionisunlimited.ASMEASMEY14.43-2011[RevisionofASMEY14.43-2003(R2008)]DimensioningandTolerancingPrinciplesforGagesandFixturesEngineeringDrawingandRelatedDocumentationPracticesANAMERICANNATIONALSTANDARDThreeParkAvenue•NewYork,NY•10016USAThreeParkAvenue•NewYork,NY•10016USADateofIssuance:August22,2011ThisStandardwillberevisedwhentheSocietyapprovestheissuanceofanewedition.ASMEissueswrittenrepliestoinquiriesconcerninginterpretationsoftechnicalaspectsofthisStandard.Periodically,certainactionsoftheASMEY14CommitteemaybepublishedasCodeCases.CasesandinterpretationsarepublishedontheASMEWebsiteundertheCommitteePagesatastheyareissued.ASMEistheregisteredtrademarkofTheAmericanSocietyofMechanicalEngineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunitytoparticipate.Theproposedcodeorstandardwasmadeavailableforpublicreviewandcommentthatprovidesanopportunityforadditionalpublicinputfromindustry,academia,regulatoryagencies,andthepublic-at-large.ASMEdoesnot“approve,”“rate,”or“endorse”anyitem,construction,proprietarydevice,oractivity.ASMEdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithanyitemsmentionedinthisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumesanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,isentirelytheirownresponsibility.Participationbyfederalagencyrepresentative(s)orperson(s)affiliatedwithindustryisnottobeinterpretedasgovernmentorindustryendorsementofthiscodeorstandard.ASMEacceptsresponsibilityforonlythoseinterpretationsofthisdocumentissuedinaccordancewiththeestablishedASMEproceduresandpolicies,whichprecludestheissuanceofinterpretationsbyindividuals.Nopartofthisdocumentmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.TheAmericanSocietyofMechanicalEngineersThreeParkAvenue,NewYork,NY10016-5990Copyright©2011byTHEAMERICANSOCIETYOFMECHANICALENGINEERSAllrightsreservedPrintedinU.S.A.CONTENTSForeword ivCommitteeRoster viCorrespondencetheY14Committee viiGeneral 1References 1Definitions 1Principles 4GageDesign 10DimensioningandTolerancing 18Usage 30Fixtures 33FiguresFixedPinConstruction 14PushPinConstruction—1 15PushPinConstruction—2 16DatumSymbol 20AbsoluteTolerancingMethod 21Gagemakers’ToleranceClasses 22Gagemakers’ToleranceChart 22TablesPlugGageLimitDimensions—ClassesZM,YM,andXM 23PlugGageLimitDimensions—ClassXXM 25RingandSnapGageLimitDimensions—ClassesZM,YM,andXXM 27RingandSnapGageLimitDimensions—ClassXXXM 29MandatoryAppendicesIllustrationsofGagingPolicy 35MaterialConditionExplanation 41NonmandatoryAppendicesExamplesofGageCharacteristics 47GagingExamplesandIllustrations 61RegardlessofFeatureSize(RFS)andRegardlessofMaterialBoundary(RMB) 129iiiFOREWORDThisStandardcontainsinformationshowingmethodsforcreatinggagesandfixturesforfeaturesthatuseprinciplesfoundinASMEY14.5,DimensioningandTolerancing.ItaddressesGOformeasuringmaximummaterialcondition(MMC)andNOGOgagesformeasuringleastmaterialcondition(LMC).ThismaterialwasdevelopedfromANSIB4.4-1981,Inspectionofworkpieces,whichhassincebeenretired.ThisStandardaddressesfunctionalgagesusedforthemeasurementofgeometrictolerances,specificallyfortheverificationofvirtualconditionboundaries[MMCandmaximummaterialboundary(MMB)concepts].Italsoshowsexamplesoffunctionalandfixturesusedforthemeasurementofworkpiecegeometrictolerancesreferencedatoffeaturesize(RFS)andregardlessofmaterialboundary(RMB).GO,NOGO,andfunctionalgagesareprimarilyusedforthecollectionofattributedata.Fixturesareusedtoproperlysimulatedatumfeatureswhileanendproductisbeingmeasuredforvariabledatacollectionandincertainstagesofmanufacturing.ThisStandardshowstheprinciplesandchoicesavailabletodesign,dimension,andtolerancegagesandfixturesincompliancewiththeprinciplesinASMEY14.5-2009andpreviouseditions.ThegagesandfixturesdisplayedinthisStandardrepresentthephysicalembodimentofthetheoryshowninASMEY14.5forthesimulationofvirtualcondition(MMCconcept)boundariesandproperdatumfeaturesimulation.GagesdiscussedinthisStandarddealwiththecollectionofattributedataonly(goodversusbadinformation),whilefixturesaretobeusedinconjunctionwithvariabledatacollectiondevices.AsillustratedinthisStandard,fixturesdifferfromgagesinthatgagesrepresentreferencedfeaturesandcontrolledfeatures,whilefixturesrepresentonlythereferenceddatumfeatures.TherulesandprinciplesinthisStandardareconsistentwiththoseinANSIB4.4andASMEY14.5.MoreinformationandexamplesofgagesandfixturesarepresentedinthisStandard.Theunderstandingofgagesandfixturesisthekeytounderstandingdimensioningandtoleranc-ingofproductsinaccordancewithASMEY14.5.ThisStandardisintendedtoservetheneedsofthoseprofessionalswhoaredesigninggagesandfixturesforworkpiecesdimensionedandtolerancedperASMEY14.5.FollowingaretherevisionstothiseditionofASMEY14.43:havebeenaddedtoshowdefinitions,sizes,tolerances,tolerancedistribution,roughnessaveragesforvariousgagetypesandclassesoffit(ZM,YM,XM,XXM,andXXXM).Thedatumfeaturetranslationsymbolisusedanditsmeaningsimulatedingages.Moveabledatumtargetsimulatorsareshownforthemovabledatumtargetsymbol.Oddlyconfigureddatumfeaturesaresimulatedingageswithmoreinformationonelementsizes.Moreexamplesofpushpingagesareshown.Threadedholesareshowngagedinimproveddetail.Completelydisassemblablegagesareshowningreaterandimproveddetail.Curvedsurfacesasdatumfeaturesaresimulatedingages.Releasingandinvokingspatialdegreesoffreedomfordatumfeaturesisdemonstratedgaged.Radiireferencedasdatumfeaturesaresimulatedingages.Offsetslotteddatumfeaturesaregaged.Thenewsymbolforunequalorunilateralprofiletolerancesisshownongages.Planargagingelementsreferencedatbasiclocationsareshown.MoreexamplesofRFSandRMBdatumfeaturesimulatorsareillustrated.PlanardatumfeaturesaresimulatedatRMBandMMB.DatumfeaturepatternsaresimulatedatRMBwithexpandinggagepins.Moreexamplesofprofileofasurfaceusedonoddlyconfiguredholesareshowngaged.Conicaldatumfeaturesareshownfixturedinordertogageradialholes.ComplexdatumpatternsreferencedatRMBandMMBwereadded.ivTheserevisionsareintendedtoprovidetheuserwithmoredetailedinformationandain-depthunderstandingofthedesign,dimensioning,andtolerancingofgagesandfixturespreviouslypresented.SuggestionsforimprovementofthisStandardarewelcome.TheyshouldbesenttoTheAmericanSocietyofMechanicalEngineers;Attn:Y14Committee;ThreeParkNY10016.ThisStandardwasapprovedbyANSIasanAmericanNationalStandardonJanuary28,2011.vASMEY14COMMITTEEEngineeringDrawingandRelatedDocumentationPractices(ThefollowingistherosteroftheCommitteeatthetimeofapprovalofthisStandard.)STANDARDSCOMMITTEEOFFICERSF.Bakos,Jr.,ChairA.Kaba,ViceChairC.J.Gomez,SecretarySTANDARDSCOMMITTEEPERSONNELA.R.Anderson,DimensionalControlSystems,Inc.F.Bakos,Jr.,ConsultantJ.Burleigh,ConsultantD.E.Day,TEC-EASE,Inc.K.Dobert,UGSPLMSolutionsC.J.Gomez,TheAmericanSocietyofMechanicalEngineersB.A.Harding,PurdueUniversityD.H.Honsinger,ConsultantW.A.Kaba,SpiritAeroSystems,Inc.K.S.King,BAESystems

A.Krulikowski,EffectiveTraining,Inc.E.F.McCarthy,RaytheonMissileSystemsP.J.McCuistion,OhioUniversityJ.D.Meadows,JamesD.Meadows&Associates,Inc.M.E.Meloro,NorthropGrummanCorp.H.W.Oakes,U.S.AirForceN.H.Smith,SpiritAeroSystems,Inc.M.J.Stahl,Caterpillar,Inc.N.Stern,UnitedStatesArmyR.G.Wilhelm,UniversityofNorthCarolinaB.A.Wilson,TheBoeingCo.SUBCOMMITTEE43—DIMENSIONINGANDTOLERANCINGPRINCIPLESFORGAGESANDFIXTURESJ.D.Meadows,Chair,JamesD.Meadows&Associates,Inc.J.D.Keith,ViceChair,SpiritAeroSystems,Inc.P.J.McCuistion,Secretary,OhioUniversityR.G.Campbell,HarperCollegeB.R.Fischer,AdvancedDimensionalManagement,LLCP.Hastie,Consultant

M.E.Hoganson,VisteonCorp.R.Hughes,ElCaminoCollegeP.Mares,TheBoeingCo.E.F.McCarthy,RaytheonMissileSystemsJ.I.Miles,Sr.,LockheedMartinAeronauticsR.A.Wheeler,GoodrichAerostructuresviviCORRESPONDENCEWITHTHEY14COMMITTEEGeneral.ASMEStandardsaredevelopedandmaintainedwiththeintenttorepresenttheconsensusofconcernedinterests.Assuch,usersofthisStandardinteractwiththeCommitteebyrequestinginterpretations,proposingrevisions,andattendingCommitteemeetings.Corre-spondenceshouldbeaddressedto:Secretary,Y14StandardsCommitteeTheAmericanSocietyofMechanicalEngineersThreeParkAvenueNewYork,NY10016-5990/InquiryProposingRevisions.RevisionsaremadeperiodicallytotheStandardtoincorporatechangesthatappearnecessaryordesirable,asdemonstratedbytheexperiencegainedfromtheapplicationoftheStandard.Approvedrevisionswillbepublishedperiodically.TheCommitteewelcomesproposalsforrevisionstothisStandard.Suchproposalsshouldbeasspecificaspossible,citingtheparagraphnumber(s),theproposedwording,andadetaileddescriptionofthereasonsfortheproposal,includinganypertinentdocumentation.ProposingaCase.Casesmaybeissuedforthepurposeofprovidingalternativeruleswhenjustified,topermitearlyimplementationofanapprovedrevisionwhentheneedisurgent,ortoproviderulesnotcoveredbyexistingprovisions.CasesareeffectiveimmediatelyuponASMEapprovalandshallbepostedontheASMECommitteeWebpage.RequestsforCasesshallprovideaStatementofNeedandBackgroundInformation.TherequestshouldidentifytheStandard,theparagraph,figureortablenumber(s),andbewrittenasaQuestionandReplyinthesameformatasexistingCases.RequestsforCasesshouldalsoindicatetheapplicableedition(s)oftheStandardtowhichtheproposedCaseapplies.Interpretations.Uponrequest,theY14Committeewillrenderaninterpretationofanyrequire-mentoftheStandard.InterpretationscanonlyberenderedinresponsetoawrittenrequestsenttotheSecretaryoftheY14StandardsCommittee.Therequestforinterpretationshouldbeclearandunambiguous.Itisfurtherrecommendedthattheinquirersubmithis/herrequestinthefollowingformat:Subject: Citetheapplicableparagraphnumber(s)andthetopicoftheEdition: CitetheapplicableeditionoftheStandardforwhichtheinterpretationisbeingrequested.Question: Phrasethequestionasarequestforaninterpretationofaspecificrequirementsuitableforgeneralunderstandinganduse,notasarequestforanofaproprietarydesignorsituation.Theinquireralsoincludeanyordrawings,thatarenecessarytoexplainthequestion;theynotcontainproprietarynamesorinformation.RequeststhatarenotinthisformatberewrittenintheappropriateformatbytheCommitteepriortobeinganswered,whichinadvertentlychangetheintentoftheoriginalrequest.ASMEproceduresprovideforreconsiderationofanyinterpretationwhenorifadditionalinformationthatmightaffectaninterpretationisavailable.Further,personsaggrievedbyaninterpretationmayappealtothecognizantASMECommitteeorSubcommittee.ASMEdoesnot“approve,”“certify,”“rate,”or“endorse”anyitem,construction,proprietarydevice,oractivity.AttendingCommitteeMeetings.TheY14StandardsCommitteeregularlyholdsmeetingsthatareopentothepublic.PersonswishingtoattendanymeetingshouldcontacttheSecretaryoftheY14StandardsCommittee.

viiINTENTIONALLYLEFTBLANKviiiINTENTIONALLYLEFTBLANKviiiASMEY14.43-2011DIMENSIONINGANDTOLERANCINGPRINCIPLESFORGAGESANDFIXTURESGENERALScopeThisStandardpresentsthedesignpracticesfordimen-sioningandtolerancingofgagesandfixturesusedtheverificationofmaximummaterialcondition(MMC)sizeenvelopesandvirtualconditionboundariesgener-atedbygeometrictolerancescontrolledatMMC,datumfeaturescontrolledatmaximummaterialary(MMB).Someexamplesofgagesandfixturestoinspectworkpiecesusingregardlessoffeaturesize(RFS)andregardlessofmaterialboundary(RMB)areshowninNonmandatoryAppendixC.Mostofthesepracticesfocusonthedesignofreceiver-typegagesthatcollectattributedatawhenusedfortheverificationofworkpiecesdimensionedandtolerancedinaccordancewithASMEY14.5-2009.Someexamplesoffixturingworkpiecesforthecollectionofvariablesdataareshown.ThesepracticesrepresentexamplesofproductdefinitionsallowedbyASMEY14.5.SinceASMEY14.5isnotagagingstandard,ASMEY14.43showsthepracticalembodimentofthetheorydisplayedinASMEY14.5byillustratinghowtheworkpiecescanbefixturedandgagedfortoleranceverification.Forgagingandfixturingprinciplesandpractices,sections4through8andMandatoryAppendicesIandUnitsTheInternationalSystemofUnits(SI)isfeaturedinthisStandardasitcommonlysupersedesU.S.Customaryunitsspecifiedonengineeringdraw-ings.U.S.Customaryunitscouldequallywellhaveusedwithoutprejudicetotheprinciplesestablished.FiguresThefiguresinthisStandardareinaccordancewithASMEY14.5-2009.Thefiguresareintendedonlyasillus-trationstoaidtheuserinunderstandingtheprinciplesandmethodsofgagingandfixturingdescribedinthetext.Figuresshowaddeddetailforemphasisorbeincompletebyintent.Numericalval-uesofdimensionsandtolerancesareillustrativeReferencetoThisStandardWheredrawingsarebasedonthisStandard,itshallbenotedonthedrawingorinadocumentreferenced

onthedrawing.ReferencetothisStandardshallstate“PreparedinaccordancewithASMEY14.43-2011.”REFERENCESThefollowingrevisionsofAmericanNationalStandardsformapartofthisStandardtotheextentspecifiedherein.AmorerecentrevisionbeusedprovidedthereisnoconflictwiththetextofthisStandard.IntheeventofaconflictbetweenthetextofthisStandardandthereferencescitedherein,thetextofthisStandardshalltakeprecedence.ASMEB4.2,PreferredMetricLimitsandFitsASMEB46.1,SurfaceTexture(SurfaceRoughness,Waviness,andLay)ASMEB89.6.2,TemperatureandHumidityforDimensionalMeasurementASMEB89.7.2,DimensionalMeasurementPlanningASMEY14.36M-1996,SurfaceTextureSymbolsASMEY14.5-2009,DimensioningandTolerancingASMEY14.5M-1994,DimensioningandTolerancingASMEY14.5.1M-1994,MathematicalDefinitionofDimensioningandTolerancingPrinciplesPublisher:TheAmericanSocietyofMechanicalEngineers(ASME),ThreeParkAvenue,NewYork,NY10016-5990;ASMEOrderDepartment:22LawDrive,P.O.Box2900,Fairfield,NJ07007-2900()DEFINITIONSGeneralThefollowingtermsaredefinedastheiruseappliesinthisStandard.SometermsusedinthisStandardarerepeatedfromASMEY14.5-2009orASMEY14.5M-1994andareuniquetothoseissues.Inothercases,thearecommontoseveralversionsofASMEY14.5anddateisshown.GagingActualLocalSizeactuallocalsize:themeasuredvalueofanyindividualdistanceatanycrosssectionofafeatureofsize.1ASMEY14.43-2011ActualMatingEnvelopeActual Mating Envelope(ASMEY14.5-2009)actualmatingenvelope:anenvelopeoutsideofthemate-rial.Itisasimilarperfectfeature(s)counterpartofsmall-estsizethatcanbecontractedaboutanexternalfeature(s)orlargestsizethatcanbeexpandedwithinaninternalfeature(s)sothatitcoincideswiththesur-face(s)atthehighestpoints.typesofactualmatingenvelopes—unrelated(notconstrainedtodatums)andrelated(constrainedtodatums)—aredescribedrelatedactualmatingenvelope:asimilarperfectfeaturecounterpartexpandedwithinaninternalfeature(s)orcontractedaboutanexternalfeature(s)whilecon-strainedeitherinorientationorlocationorbothtotheapplicabledatum(s).unrelatedactualmatingenvelope:asimilarperfectfea-ture(s)counterpartexpandedwithinaninternalfea-ture(s)orcontractedaboutanexternalfeature(s),andnotconstrainedtoanydatum(s).Actual Mating Envelope(ASMEY14.5M-1994)actualmatingenvelope:anenvelopedefinedaccordingthetypeoffeature,asfollows:ForanExternalFeature:Asimilarperfectcounterpartofsmallestsizethatcanbecircumscribedaboutthefeaturesothatitjustcontactsthesurfacethehighestpoints,forexample,asmallestcylinderperfectformortwoparallelplanesofperfectformminimumseparationthatjustcontact(s)thehighestpointsofthesurface(s).Forfeaturescontrolledbyorien-tationorpositionaltolerances,theactualmatinglopeisorientedrelativetotheappropriatedatum(s),example,perpendiculartoaprimarydatumplane.ForanInternalFeature:Asimilarperfectcounterpartoflargestsizethatcanbeinscribedthefeaturesothatitjustcontactsthesurfaceathighestpoints,forexample,alargestcylinderofformortwoparallelplanesofperfectformatmaximumseparationthatjustcontact(s)thehighestpointsofsurface(s).Forfeaturescontrolledbyorientationortionaltolerances,theactualmatingenvelopeisrelativetotheappropriatedatum(s).AttributeGageattributegage:thefamilyofreceivergagesusedtoattributesdata,forexample,GOandfunctionalgages.AttributesDataattributesdata:informationobtainedfromaninspectionprocessthatindicatesonlywhetherapartisacceptableornotacceptable.Calibrationcalibration:theactofinspectingandsubsequentadjustingofagage,whereneeded,tomeetaspecificparameter.Certificationcertification:theactofdocumentingthatagagemeetsaspecificparameter.ComplexFeature(ASMEY14.5-2009)complexfeature:asinglesurfaceofcompoundcurvatureoracollectionofotherfeaturesthatconstrainsuptosixspatialdegreesoffreedom.DatumFeatureSimulatorNOTE:ASMEY14.5-2009definesadatumfeaturesimulatorashavingtwodefinitions:datumfeaturesimulator(theoretical)anddatumfeaturesimulator(physical).AlthoughinASMEY14.5-2009thedefaultmeaningofthetermistheoretical,inASMEY14.43thedefaultmeaningofthetermisphysical.Datum Feature Simulator (ASMEY14.5M-1994)datumfeaturesimulator:asurfaceofadequatelyform(suchasasurfaceplate,agagesurface,oradrel)contactingthedatumfeature(s)andusedtoestab-lishthesimulateddatum(s).NOTE:Simulateddatumfeaturesareusedasthepracticalembodimentofthedatumsduringmanufactureandinspection.DatumFeatureSimulator(Physical)(ASMEY14.5-2009)datumfeaturesimulator(physical):thephysicalboundaryusedtoestablishasimulateddatumfromaspecifieddatumfeature.NOTE:Forexample,gages,fixtureelements,ordigitaldata(suchasmachinetables,surfaceplates,amandrel,ormathematicalsimu-lation),althoughnottrueplanes,areofsufficientqualitythattheplanesderivedfromthemareusedtoestablishsimulateddatums.Physicaldatumfeaturesimulatorsareusedasthephysicalembodi-mentofthetheoreticaldatumfeaturesimulatorsduringmanufac-turingandinspection.FeatureofSize,Irregular(ASMEY14.5-2009)irregularfeatureofsize:thetwotypesofirregularofsizeareasfollows:adirectlytolerancedfeatureorcollectionoffea-turesthatcontainorbecontainedbyanactualmatingenvelopethatisasphere,cylinder,orpairofparallelplanesadirectlytolerancedfeatureorcollectionoffea-turesthatcontainorbecontainedbyanactualmatingenvelopeotherthanasphere,cylinder,orofparallelplanesFeatureofSize,Regular(ASMEY14.5-2009)regularfeatureofsize:onecylindricalorsphericalsurface,acircularelement,andasetoftwoopposedparallel2ASMEY14.43-2011elementsoropposedparallelsurfaces,eachofwhichisassociatedwithadirectlytoleranceddimension.FixedLimitGagefixedlimitgage:adeviceofdefinedgeometricformandsizeusedtoassesstheconformanceofafeature(s)ofaworkpiecetoadimensionalspecification.Alsoreferredtoasa“limitgage.”Fixturefixture:adeviceusedtoholdpartssecurelyinthepositioninatoolorgageduringmanufacturing,orinspection.FunctionalFixturefunctionalfixture:adevicehavingintegralgageelementsthatmakephysicalcontactwithpartdatumfeatures.Ittypicallyholdspartsastheywouldbeheldwhenassembled.Thefixtureanditsgageelementsrepresentsimulateddatumfeaturesfromthepartandareidenti-fiedondrawingsusingtechniquesfoundinASMEY14.5.FunctionalGagefunctionalgage:afixedlimitgageusedtoverifyconditionboundaries(MMCconcept)generatedbycollectiveeffectofthefeature’sMMCandtheapplicablegeometrictoleranceattheMMCsize.GageElementgageelement:aphysicalfeatureofthegageusedinverificationofworkpiececompliancetotheassociatedtolerancerequirement.Thesephysicalfeaturesdatumfeaturesimulators,virtualcondition,ormaterialboundaries.GOGageGOgage:afixedlimitgagethatchecksafeatureofsizeforacceptancewithinMMCperfectformboundary.Least Material Boundary (LMB)(ASMEY14.5-2009)leastmaterialboundary(LMB):thelimitdefinedbyatoler-anceorcombinationoftolerancesthatexistsonorthematerialofafeature(s).LeastMaterialCondition(LMC)leastmaterialcondition(LMC):theconditioninwhichafeatureofsizecontainstheleastamountofmaterialwithinthestatedlimitsofsize(e.g.,maximumholediameter,minimumshaftdiameter).MaximumMaterialBoundary(MMB)(ASMEY14.5-2009)maximummaterialboundary(MMB):thelimitdefinedbyatoleranceorcombinationoftolerancesthatexistsonoroutsidethematerialofafeature(s).NOTE:calculatetheappropriateMMBfordatumfeaturesim-ulation,seeASMEY14.5-2009,Fig.4-16andparas.4.11.5and4.11.6.

MaximumMaterialCondition(MMC)maximummaterialcondition(MMC):theconditioninwhichafeatureofsizecontainsthemaximumamountofmaterialwithinthestatedlimitsofsize(e.g.,mini-mumholediameter,maximumshaftdiameter).NOGOGageNOGOgage:afixedlimitgagethatchecksafeaturesizeforviolationoftheLMCactuallocalsize.Thisisalsoreferredtoasa“NOTGOgage.”RegardlessofFeatureSize(RFS)regardlessoffeaturesize(RFS):indicatesthatageometrictoleranceappliesatanyincrementofsizeoftheactualmatingenvelopeofthefeatureofsize.RegardlessofMaterialBoundary(RMB)(ASMEY14.5-2009)regardlessofmaterialboundary(RMB):indicatesthatdatumfeaturesimulatorprogressesfromMMBLMBuntilitmakesmaximumcontactwiththeextremi-tiesofafeature(s).ResultantConditionResultantCondition(ASMEY14.5-2009)resultantcondition:thesingleworst-caseboundarygener-atedbythecollectiveeffectsofafeatureofsize’sfiedMMCorLMC,thegeometrictoleranceformaterialcondition,thesizetolerance,andtheadditionalgeometrictolerancederivedfromthefeature’sfromitsspecifiedmaterialcondition.Resultant Condition (ASMEY14.5M-1994)resultantcondition:thevariableboundarygeneratedthecollectiveeffectsofasizefeature’sspecifiedorLMC,thegeometrictoleranceforthatmaterialtion,thesizetolerance,andtheadditionalgeometrictolerancederivedfromthefeature’sdeparturefromspecifiedmaterialcondition.SeparateGagingRequirementseparategagingrequirement:theconditioninwhichfea-turesorpatternsoffeaturesthatarelocatedfromacommondatumreferenceframedonotneedtobeinspectedtogether(thisdoesnotaffectthewithin-patternrequirement).Ifsimultaneousgagingisnotrequired,theabbreviation“SEPREQT”isplacedunderthefeaturecontrolframe.Seesimultaneousgagingrequirement.SimultaneousGagingRequirementsimultaneousgagingrequirement:theconditioninallofthefeaturesorpatternsoffeaturesthatarelocatedfromacommondatumreferenceframeareinspectedtogetherasasinglepatternrelativetothatcommon3ASMEY14.43-2011datumreferenceframe.Thelowersegmentofacompos-itefeaturecontrolframedoesnotsharetheunlessspecifiedbytheabbreviation“SIMVariablesDatavariablesdata:informationobtainedfromaninspectionprocessthatindicatesthelevelofacceptabilityofapartbyyieldingameasuredvalue.Therefore,thelevelofacceptabilityisrecordedasanumericalvalue.VirtualConditionvirtualcondition:aconstantboundarygeneratedbycollectiveeffectsofaconsideredfeatureofthespecifiedMMCorLMCandthegeometrictolerancethatmaterialcondition.VirtualCondition(MMCConcept)virtualcondition(MMCconcept):forallinternalofsizethisiscalculatedbysubtractingthegeometrictoleranceapplicableatMMCfromtheMMCsizeoffeature.Forallexternalfeaturesofsize,thisiscalculatedbyaddingthegeometrictoleranceapplicab