Dimensioning and Tolerancing Engineering Product ...

1 Dimensioning and TolerancingEngineering Product Definition and Related Documentation PracticesAN INTERNATIONAL STANDARDASME (Revision of ASME ) ASME ADOPTION NOTICE ASME , Dimensioning and Tolerancing , was adopted on 9 February 2009 for use by the Department of Defense (DoD). Proposed changes by DoD activities must be submitted to the DoD Adopting Activity: Commander, Army Research, Development and Engineering Center (ARDEC), ATTN: AMSRD-AAR-QES-E, Picatinny Arsenal, NJ 07806-5000. Copies of this document may be purchased from The American Society of Mechanical Engineers (ASME), 150 Clove Road, 6th Floor, Little Falls, NJ 07424-2139; Custodians: Army AR Navy SA Air Force 16 Adopting Activity: Army AR (Project DRPR-2009-003) Review Activities: Army CR, MI, PT, TM Navy AS, CG, CH, EC, MC, NP, TD Air Force 13, 99 DLA DH OSD SE NSA NS Other CM, MP, DC2 NOTE: The activities listed above were interested in this document as of the date of this document.

2 Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at ASMC N\A AREA DRPR DISTRIBUTION STATEMENT A. Approved for public release, distribution is unlimited. (Revisionof )DimensioningandTolerancingEngineeringPr oductDefinitionandRelatedDocumentationPr acticesANINTERNATIONALSTANDARDxDateof Issuance:February11, 2019 This Standardwill be revisedwhenthe Societyapprovesthe issuanceof a the ASMEY14 Committee may be publishedas publishedon the ASME websiteunderthe Y14 Committee Pageat as theyare codesand standardsmaybe posted on the ASME websiteunderthe Committee Pagesto providecorrectionstoincorrectlypublished items, or to correcttypographicalor grammaticalerrors in codesand be usedon the Y14 Committee Pagecan be foundat Thereis an optionavailableto automaticallyreceivean e-mailnotificationwhenerrataare posted to a particularcodeor optioncan be foundon theappropriateCommittee Pageafter selecting Errata in the PublicationInformation the registeredtrademarkof The AmericanSocietyof codeor standardwas developedunderproceduresaccreditedas meetingthe criteriafor StandardsCommittee that approvedthe codeor standardwas balancedto assurethat individualsfrom competentand concernedinterestshavehad anopportunityto proposedcodeor standardwas madeavailablefor publicreviewand commentthat providesan opportunityfor additionalpublicinputfrom industry, academia,regulatoryagencies,and the approve, rate, or endorse any item, construction,proprietarydevice.

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4 XivCommitteeRoster..xvCorrespondenceWith the Y14 Committee..xviSection1 Scope.. This Standard.. SeriesConventions.. a Standard.. Gaging..3 Section2 References.. Standards.. (Not Cited)..4 Section3 Definitions..5 Section4 FundamentalRules,TolerancingDefaults,and DimensioningPractices.. of Measure.. Dimensioning .. Dimensions.. Features..18 Section5 Tolerancing ,Interpretationof Limits,Limitsof Size, and .. Limits.. TolerancedDimensions.. an Origin.. Size.. Modifierson GeometricToleranceValuesand .. Splines.. Tapers..39 Section6 Symbology.. of Notesto SupplementSymbols.. Shape..58 Section7 DatumReferenceFrames.. Freedom.. FreedomConstrainedby PrimaryDatumFeaturesRMB.. Freedomof a Part.. GeometricCounterpart.. GeometricCounterpartsand PhysicalDatumFeatureSimulators.. an Orderof Precedence.. DatumAxis or Point.. MMB,LMB, and RMB to IrregularFeaturesof Size.. a CustomizedDatumReferenceFrame..83 Section8 Tolerancesof Form..150 Section9 Tolerancesof Orientation.

5 164 Section10 Tolerancesof Position.. I.. II.. SymmetricalRelationships..188 Section11 Tolerancesof Profile.. Boundaries.. BoundaryConditionModifiersas Relatedto ProfileControls.. a Line as a Refinement..244 Section12 Tolerancesof Runout.. RunoutTolerances.. Size..289 MandatoryAppendixIAlternatePractices..30 6 NonmandatoryAppendicesAPrincipalChangesa nd Improvements..310 BFormulasfor PositionalTolerancing..315 CForm,Proportion,and Comparisonof Symbols..318 DFormerPractices..326 Figures3-1 Relatedand UnrelatedAME..103-2 Relatedand UnrelatedActualMinimumMaterialEnvelopeFr omFigure3-1..114-1 AngularUnits..19v4-2 MillimeterDimensions..194-3 DecimalInch Dimensions..194-4 Applicationof Dimensions..194-5 Groupingof Dimensions..194-6 Spacingof DimensionLines..204-7 StaggeredDimensions..204-8 ObliqueExtensionLines..204-9 Breaksin ExtensionLines..204-10 Point Locations..204-11 LimitedLengthor Area Indication..214-12 Leaders..214-13 Leader-DirectedDimensions.

6 214-14 MinimizingLeaders..224-15 LeaderDirections..224-16 ReadingDirections..224-17 IntermediateReferenceDimension..224-18 OverallReferenceDimension..224-19 Diameters..234-20 Radii..234-21 RadiusWith LocatedCenter..234-22 Radii With UnlocatedCenters..234-23 ForeshortenedRadii..244-24 True Radius..244-25 SphericalRadius..244-26 DimensioningArcs and Chords..244-27 SlottedHoles..254-28 PartiallyRoundedEnds..254-29 RoundedCorners..254-30 CircularArc Outline..254-31 Coordinateor OffsetOutline..254-32 TabulatedOutline..254-33 SymmetricalOutline..264-34 RoundHoles..264-35 CounterboredHoles..264-36 HolesWith MultipleCounterbores..274-37 Countersunkand CounterdrilledHoles..274-38 Countersinkon a CurvedSurface..284-39 SpotfacedHoles..284-40 Chamfers..284-4145 Chamfer..284-42 InternalChamfers..294-43 ChamfersBetweenSurfacesat OtherThan 90 ..294-44 Keyseats..294-45 Knurls..294-46 Knurlsfor PressFits..29vi4-47 RectangularCoordinateDimensioning..304-4 8 RectangularCoordinateDimensioningWithout DimensionLines.

7 304-49 RectangularCoordinateDimensioningin TabularForm..314-50 Polar CoordinateDimensioning..314-51 RepetitiveFeatures..314-52 RepetitiveFeaturesand Dimensions..325-1 Limit Dimensioning ..405-2 Plus and MinusTolerancing..405-3 IndicatingSymbolsfor MetricLimitsand Fits..405-4 ToleranceAccumulation:One DatumReferenceFrame..415-5 ToleranceAccumulation:MultipleDatumRefer enceFrames..425-6 RelatingDimensionalLimitsto an Origin..425-7 ExtremeVariationsof FormAllowedby a Size Tolerance..435-8 ExtremeVariationsof FormAllowedby a GeometricTolerance PerfectFormat LMC..435-9 Size Meaning..445-10 Independencyand FlatnessApplication..445-11 ContinuousFeature,ExternalCylindrical..4 55-12 ContinuousFeature,InternalCylindrical..4 55-13 ContinuousFeature,ExternalWidth..465-14 Virtualand ResultantConditionBoundariesUsingthe MMC Concept InternalFeature..465-15 Virtualand ResultantConditionBoundariesUsingthe LMC Concept InternalFeature..475-16 Innerand OuterBoundariesUsingthe RFS Concept InternalFeature.

8 485-17 Virtualand ResultantConditionBoundariesUsingthe MMC Concept ResultantConditionBoundariesUsingthe LMC Concept ExternalFeature..505-19 Innerand OuterConditionBoundariesUsingthe RFS Concept ExternalFeature..515-20 Tolerancingan AngularSurfaceUsinga Combinationof Linearand AngularDimensions..515-21 SpecifyingTapers..525-22 Specifyinga Basic Taperand a Basic Diameter..525-23 Specifyinga Flat Taper..525-24 Specifyinga Radius..525-25 Specifyinga ControlledRadius..535-26 StatisticalTolerancing..535-27 StatisticalTolerancingWith ArithmeticLimits..535-28 StatisticalTolerancingWith GeometricControls..536-1 GeometricCharacteristicSymbols..596-2 DatumFeatureSymbol..596-3 DatumFeatureSymbolson a FeatureSurfaceand an ExtensionLine..596-4 Placementof DatumFeatureSymbolson Featuresof Size..606-5 Placementof DatumFeatureSymbolin ConjunctionWith a FeatureControlFrame..606-6 Two DatumFeaturesEstablishinga SingleDatumPlane..616-7 DatumTargetSymbolExamples..616-8 DatumTargetPoint.

9 616-9 DatumTargetLine..626-10 DatumTargetArea..626-11 Basic DimensionSymbolApplication..63vii6-12 ModifyingSymbols..636-13 IndicatingThat the SpecifiedToleranceIs a StatisticalGeometricTolerance..636-14 StatisticalToleranceSymbol..636-15 Between Symbol..636-16 Counterboreand SpotfaceSymbols..646-17 CountersinkSymbol..646-18 DepthSymbol..646-19 SquareSymbol..656-20 DimensionOriginSymbol..656-21 Applicationof All Over and All Around Symbols..656-22 FeatureControlFrameWith FreeState Symbol..656-23 Applicationof MovableDatumTarget Symbol..656-24 FeatureControlFrame..656-25 FeatureControlFrameIncorporatinga DatumFeatureReference..656-26 Orderof Precedenceof DatumFeatureReference..666-27 MultipleFeatureControlFrames..666-28 CombinedFeatureControlFrameand DatumFeatureSymbol..666-29 FeatureControlFrameWith a ProjectedToleranceZone Symbol..666-30 FeatureControlFramePlacement..676-31 TabulatedTolerances..697-1 DatumReferenceFrame..857-2 Sequenceof DatumFeaturesRelatesPart to DatumReferenceFrame.

10 867-3 ConstrainedDegreesof Freedomfor PrimaryDatumFeatures..877-4 Part WhereRotationalConstraintIs Important..887-5 Developmentof a DatumReferenceFramefor the Part in Figure7-4..897-6 Developmentof a DatumReferenceFrame..907-7 DatumPlaneEstablishment..927-8 Establishmentof Datumsfor PrimaryExternalCylindricalDatumFeatureRM B..927-9 Establishmentof Datumsfor PrimaryInternalCylindricalDatumFeatureRM B..937-10 Establishmentof Datumsfor PrimaryExternalDatumWidthFeatureRMB..947 -11 Establishmentof Datumsfor PrimaryInternalDatumWidthFeatureRMB..957 -12 Developmentof a DatumReferenceFrameWith TranslationModifier..967-13 InclinedDatumFeature..987-14 Part With CylindricalDatumFeature..997-15 MultipleDatumReferenceFramesand TheirInterrelationships..1007-16 Two CoaxialDatumFeatures,SingleDatumAxis..10 17-17 Two DatumFeaturesRMB, SingleDatumAxis..1027-18 Hole PatternIdentifiedas DatumFeature..1037-19 Effectof SecondaryDatumFeatureReferenceApplicable at RMB and MMB..1047-20 Effectof PrimaryDatumFeatureReferenceApplicableat RMB and MMB.