>> P.30
A27IdentificationNumberTheidentificationnumberofIKOBearingsconsistsofamodelnumberandsupplementalcodes.Thedescriptionsoftypicalcodesandtheirarrangementsareshownbelow.Therearemanycodesotherthanthosedescribed.Seethesectionofidentificationnumberofeachbearing.Table10Arrangementofidentificationnumberofbearing12345678ModelcodeBoundarydimensionsMaterialsymbolCagesymbolShieldsymbolSealsymbol,BearingringshapesymbolClearancesymbolClassificationsymbolModelnumberSupplementalcodeModelcodeThemodelcoderepresentsthebearingseries.ThefeaturesofeachbearingseriesareshownonpagesA5toA15.BoundarydimensionsOneofthefollowingfourkindsofpresentationmeth-odsisusedforshowingboundarydimensionsintheidentificationnumber,whichvarydependingonthebearingseries.Table11showsthepresentationmethodsofboundarydimensionsforeachmodelcode.(a)Dimensionseries+Borediameternumber(b)orediameterorrollersetborediameter+Outsidediameterorrollersetoutsidediameter+Width(c)Borediameterorrollersetborediameter+Width(d)BasicdiameterMaterialsymbolFStainlesssteelforbearingringsandrollingelementsSymbolTypeofmaterialCagesymbolNVMadeofsyntheticresinNocageorfullcomplementSymbolDescriptionsSealorshieldsymbolZZZUUUS(1)2RSWithdustcoverWithshieldsonbothsidesWithasealononesideWithsealsonbothsidesWithThrustDiskSealsTMWithsealsonbothsidesSymbolDescriptionsNote(1) ThrustDiskSealsTMareembeddedonbothsides.BearingringshapesymbolNROH(1)JWithstopringonoutersurfaceofouterringWithoilholeinbearingringNooilholeSymbolDescriptionsNote(1) Thisdiffersdependingonthetypeofbearing.Seethesectionofeachbearing.ClearancesymbolC2(None)C3C4C5T1C1C2C2clearanceCNclearanceC3clearanceC4clearanceC5clearanceSpecialradialclearance(ApplicabletoCrossedRollerBearings)SymbolDescriptions1234567
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