>> P.33
A30ABCDEFGHIJKLMAccuracyTheaccuracyofIKONeedleRollerBearingsconformstoJISB1514-1~-3(Rollingbearings-Tolerancesofbearings),andthedimensionalaccuracyandrotation-alaccuracyarespecified.ThespecifieditemsareshowninFig.11.NeedleRollerBearingsareclassifiedinto4classesofaccuracy.Theseclassesarerepresentedbythenumbers0,6,5and4,writteninorderofincreasingaccuracy.Table12showstheaccuracyfortheinnerringsofradialbearings,Table13showstheaccuracyfortheouterringsofradialbearings,Table14showsthetol-erancesforthesmallestsinglerollersetborediame-terofradialbearings,andTable15showsthepermis-siblelimitvaluesofchamferdimensionsofradialbearings.Forthrustbearings,seethesectiononaccuracyofThrustBearings.NotethattheseriesofShellTypeNeedleRollerBearings,RollerBearings,CamFollowers,RollerFollowers,CombinedTypeNeedleRollerBearings,andCrossedRollerBearingshavespecialaccuracy.Forfurtherdetails,seethesectiononaccuracyofeachbearingseries.RemarksThemeaningsofthenewsymbolsforquantitiesusedforaccuracyofradialbearingsareasfollows:①∆representsthedeviationofadimensionfromthespecifiedvalue.②Vrepresentsthevariationofadimension.③Suffixess,m,andprepresentasingle(oractual)measurement,ameanmeasurement,andameasurementinasingleradialplane,respectively.[Example]Vdpmeansthedifferencebetweenthelargestandthesmallestoftheborediametersinasingleradialplane(circularity).Vdmpmeansthedifferencebetweenthelargestandthesmallestofthesingleplanemeanborediameters(cylindricity).DeviationofboundarydimensionsAccuracyofboundarydimensionsRotationalaccuracyAccuracyofbearingsVariationofboundarydimensionsFig.11AccuracyofbearingsSingleborediameterdeviation∆dsSingleplanemeanborediameterdeviation∆dmpSingleoutsidediameterdeviation∆DsSingleplanemeanoutsidediameterdeviation∆DmpDeviationofasingleinnerringwidth∆BsDeviationofasingleouterringwidth∆CsBorediametervariationinasingleradialplaneVdspMeanborediametervariationVdmpOutsidediametervariationinasingleradialplaneVDspMeanoutsidediametervariationVDmpInnerringwidthvariationVBsOuterringwidthvariationVCsRadialrunoutofassembledbearinginnerringKiaAssembledbearinginnerringfacerunoutwithracewaySiaInnerringreferencefacerunoutwithboreSdRadialrunoutofassembledbearingouterringKeaAssembledbearingouterringfacerunoutwithracewaySeaVariationofoutsidesurfacegeneratrixinclinationwithouterringreferencefaceSD
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