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.

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5 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.

6 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..164 Section10 Tolerancesof Position.. I.. II.. SymmetricalRelationships..188 Section11 Tolerancesof Profile.. Boundaries.. BoundaryConditionModifiersas Relatedto ProfileControls.

7 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.

8 204-8 ObliqueExtensionLines..204-9 Breaksin ExtensionLines..204-10 Point Locations..204-11 LimitedLengthor Area Indication..214-12 Leaders..214-13 Leader-DirectedDimensions..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.

9 254-30 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..304-49 RectangularCoordinateDimensioningin TabularForm.

10 314-50 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.