>> P.237
E4■AccuracyRollerBearingsaremanufacturedinaccordancewithJIS(SeepageA31.).Asideplateforinnerringisassembledononesideofcagedorfullcomplementrollerbearings.Thetoleranceofborediameterofthesideplateisshownbelow.TolerancesofRollerBearingsforSheavesrepresentthevaluesbeforesurfacetreatment.Thetoleranceofinternaldistancebetweencir-clipsisshownbelow.Toleranceofborediameterofthesideplated:E7Toleranceofinternaldistancebetweencir-clipsC1:0〜+0.4mm■ClearanceRollerBearingsaremanufacturedtotheCNclear-anceshowninTable18onpageA37.However,RollerBearingsforSheavesaremanufacturedsothatproperoperatingclearancesareobtainedafterbeingmountedwithaspecifiedfit.■FitTherecommendedfitsforRollerBearingsareshowninTables21to22onpagesA41andA42.Therec-ommendedfitsforRollerBearingsforSheavesareshowninTable2.■LubricationBearingswithprepackedgreaseareshowninTable3.ForCagedRollerBearingsandFullComplementRollerBearings,ALVANIAGREASES2(ShellLubricantsJapanK.K.)isprepackedasthelubricatinggrease.ForRollerBearingsforSheaves,ALVANIAGREASEEP2(ShellLubricantsJapanK.K.)ispre-packedasthelubricatinggrease.Inthecaseofbearingswithoutprepackedgrease,performproperlubricationforuse.Operatingwithoutlubricationwillincreasethewearoftherollingcontactsurfacesandshortentheirlirees.■OilHoleThenumberofoilholesoftheinnerandouterringsisshowninTable4.■OperatingTemperatureRangeTheoperatingtemperaturerangeforRollerBearingsis-20℃〜+120℃.However,themaximumallow-abletemperatureforRollerBearingsforSheavesis+110℃.Table2RecommendedfitsforRollerBearingsforSheavesToleranceclassofshaftg6N7ToleranceclassofhousingboreTable3BearingswithprepackedgreaseTypeCagedtypeFullcomplementtypeForsheavesNAU,TRUNAGNASWithshieldsWithsealsStandard××-〇〇〇--〇〇:Withprepackedgrease×:WithoutprepackedgreaseTable4NumberofoilholesoftheinnerringandouterringTypeCagedtypeFullcomplementtypeForsheavesNAUd≦1717<dd≦1717<dNominalborediameter dmmTRUNAGNASWithshieldsNumberofoilholesoftheinnerringWithsealsStandardNumberofoilholesoftheouterring02202─022020─0─0─002RemarkThebearingswithoilholesarealsoprovidedwithanoilgroove.E1N=0.102kgf=0.2248lbs.1mm=0.03937inch
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