>> P.33
AccuracyTheseclassesarerepresentedbyTheaccuracyofIKONeedleRollerBearingsconformstoJISB1514-1~-3(Rollingbearings-Tolerancesofbearings),andthedimensionalaccuracyandrotation-alaccuracyarespecified.ThespecifieditemsareshowninFig.11.NeedleRollerBearingsareclassifiedinto4classesofaccuracy.thenumbers0,6,5and4,writteninorderofincreasingaccuracy.theaccuracyfortheinnerringsofTable12showsradialbearings,Table13showstheouterringsofradialbearings,Table14showsthetol-erancesforthesmallestsinglerollersetborediame-terofradialbearings,andTable15showsthepermis-limitvaluesofchamferdimensionsofradialsiblebearings.thesectiononaccuracyofThrustBearings.NotethattheseriesofShellTypeNeedleRollerBearings,RollerBearings,CamFollowers,RollerFollowers,CombinedTypeNeedleRollerBearings,andCrossedRollerBearingshavespecialaccuracy.furtherdetails,seethesectiononaccuracyofeachbearingseries.thrustbearings,seetheaccuracyforForForthenewsymbolsRemarksThemeaningsofusedfollows:①∆representsthedeviationofadimensionfromforquantitiesradialbearingsareasforaccuracyofthespecifiedvalue.②Vrepresentsthevariationofadimension.③Suffixess,m,andprepresentasingle(oractual)measurement,ameanmeasurement,andameasurementinasingleradialplane,respectively.[Example]Vdpmeansthedifferencebetweenthetheborediametersinasingleradialplane(circularity).Vdmpmeansthedifferencebetweenthelargestandthesmallestofthesingleplanemeanborediameters(cylindricity).thesmallestoflargestandAccuracyofboundarydimensionsDeviationofboundarydimensionsVariationofboundarydimensionsAccuracyofbearingsRotationalaccuracySingleborediameterdeviation∆dsSingleplanemeanborediameterdeviation∆dmpSingleoutsidediameterdeviation∆DsSingleplanemeanoutsidediameterdeviation∆DmpDeviationofasingleinnerringwidth∆BsDeviationofasingleouterringwidth∆CsBorediametervariationinasingleradialplaneVdspMeanborediametervariationVdmpOutsidediametervariationinasingleradialplaneVDspMeanoutsidediametervariationVDmpInnerringwidthvariationVBsOuterringwidthvariationVCsRadialrunoutofassembledbearinginnerringKiaAssembledbearinginnerringfacerunoutwithracewaySiaInnerringreferencefacerunoutwithboreSdRadialrunoutofassembledbearingouterringKeaAssembledbearingouterringfacerunoutwithracewaySeaVariationofoutsidesurfacegeneratrixinclinationwithouterringreferencefaceSDFig.11AccuracyofbearingsA30ABCDEFGHIJKLM
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