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A34ABCDEFGHIJKLMMethodsofMeasurementMeasurementofIKONeedleRollerBearingsisbasedonJISB1515-1,-2(Rollingbearings-Toleranc-es).Tables16and17showsomeexamplesofthemethods.SpecialmethodsareusedtomeasureShellTypeNeedleRollerBearings.Therefore,refertothesectiononaccuracyforthesebearingsonpageB3.MeasurementmethodsAccuracyanddefinitionsSingleborediameterZerothegaugeindicatortotheappropri-atesizeusinggaugeblocksoramasterring.Inseveralangulardirectionsandinasin-gleradialplane,measureandrecordthelargestandthesmallestsingleborediam-eters,dspmaxanddspmin,withinthemea-suringzone(excludingthezone1.2timestherespectivemaximumallowablecham-ferdimensionsoftheinnerringface).Repeatangularmeasurementsandrecord-ingsinseveralradialplanestodeterminethelargestandthesmallestsingleborediameter,dsmaxanddsmin.1.2rsmax1.2rsmaxdmpMeanborediameterinasingleplane∆dmpDeviationofmeanborediameterinasingleplaneVdspVariationofborediameterinasingleplaneVdmpVariationofmeanborediameter∆dsDeviationofasingleborediameterCalculatedmeanvalueofthemaximumandminimumvaluesofthesingleborediameterwithinaradialplane.dmp=dsp:SingleborediameterinasingleplaneDmpMeanoutsidediameterinasingleplaneCalculatedmeanvalueofthemaximumandminimumvaluesofthesingleoutsidediameterwithinaradialplane.Dmp=Dsp:SingleoutsidediameterinasingleplaneDeviationofmeanborediameterinasingleplaneandnominalborediameter.∆dmp=dmp-dd:NominalbearingborediameterDeviationofthemaximumandminimumvaluesofthesingleborediameterwithinaradialplane.Vdsp=dspmax-dspminDeviationofthemaximumandminimumvaluesofmeanborediameterinasingleplane,forindividualracewayringswithessentiallycylindricalborediametersurfaces.Vdmp=dmpmax-dmpminDeviationofsingleborediameterandnominalborediameter.∆ds=ds-dds:Singleborediameter(distancebetweentwoparallelstraightlinestouchingtheintersectionofthesingleborediametersurfaceandtheradialplane)SingleoutsidediameterZerothegaugeindicatortotheappropri-atesizeusinggaugeblocksoramaster.Inseveralangulardirectionsandinasin-gleradialplane,measureandrecordthelargestandthesmallestsingleoutsidediameters,DspmaxandDspmin,withinthemeasuringzone(excludingthezone1.2timestherespectivemaximumallowablechamferdimensionsoftheouterringface).Repeatandrecordmeasurementsinsev-eralradialplanestodeterminethelargestandthesmallestsingleoutsidediameter,DsmaxandDsmin.1.2rsmax1.2rsmaxdspmax+dspmin2∆DmpDeviationofmeanoutsidediameterinasingleplaneVDspVariationofoutsidediameterinasingleplaneVDmpVariationofmeanoutsidediameter∆DsDeviationofasingleoutsidediameterDeviationofmeanoutsidediameterinasingleplaneandnominaloutsidediameter.∆Dmp=Dmp-DD:NominalbearingoutsidediameterDeviationofthemaximumandminimumvaluesofthesingleoutsidediameterwithinaradialplane.VDsp=Dspmax-DspminDeviationofthemaximumandminimumvaluesofmeanoutsidediameterinasingleplane,forindividualracewayringswithessentiallycylindricaloutsidediametersurfaces.VDmp=Dmpmax-DmpminDeviationofsingleoutsidediameterandnominaloutsidediameter.∆Ds=Ds-DDs:Singleoutsidediameter(distancebetweentwoparallelstraightlinestouchingtheintersectionofthesingleoutsidediametersurfaceandtheradialplane)Dspmax+Dspmin2Table16Measurementmethodsofaccuracyofboundarydimensions1N=0.102kgf=0.2248lbs.1mm=0.03937inch
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