>> P.143
DModelcodeDimensionsSupplementalcodeClassificationsymbolNA4905UUC2P6Example2ModelcodeDimensionsBRI243716TypeofbearingBearingborediameter(24×1/16=11/2inches)Bearingoutsidediameter(37×1/16=25/16inches)Outerringwidth(16×1/16=1inch)Example1TypeofbearingDimensionseriesBorediameternumberSealsymbol(Withsealsonbothsides)Clearancesymbol(C2clearance)Accuracyclass(Class6)■AccuracyMachinedTypeNeedleRollerBearingsaremanufac-turedbasedonJIS(SeepageA31.).Thetolerancesforthesmallestsinglerollersetborediameterofbear-ingswithoutinnerringarebasedonTable14onpageA33.ForBRandBRIseries,theaccuracyisbasedonTable2andthetolerancesforthesmallestsinglerollersetborediameterarebasedonTable3.unit:μmKiaRadialrunoutofKeaRadialrunoutofassembledbearingassembledbearinginnerringMax.outerringMax.-1520253545101315202530D4Table2AccuracyofinnerandouterringsofinchseriesBRandBRIIdorDNominalbearingboredia.oroutsidedia.mm∆dmpSingleplanemeanborediameterdeviation∆DmpSingleplanemeanoutsidediameterdeviation∆Bs(∆Cs)Deviationofasingleinner(orouter)ringwidthLow-130-130-130-130-130-130High000000Low--13-13-15-20-25High-00000Over-Incl.HighLow00000--10-13-13-15-20-Remarkdfor∆dmp,∆Bs,∆CsandKia,andDfor∆DmpandKea19.05030.16250.80082.550120.650184.15019.05030.16250.80082.550120.650■IdentificationNumberTheidentificationnumberofMachinedTypeNeedleRollerBearingsconsistsofamodelcode,dimen-sions,anysupplementalcodesandaclassificationsymbol.Examplesareshownbelow.Examplesofidenticationnumber
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