>> P.510
â– IdentificationNumberTheidentificationnumberofSealsforNeedleRollerBearingsconsistsofamodelcodeanddimensions.Anexampleofanidentificationnumberisshownasfollows.ExampleofidenticationnumberModelcodeDimensionsDS20284TypeofsealShaftdia.(20mm)Outsidedia.ofseal(28mm)Widthofseal(4mm)â– AccuracyTolerancesofSealsforNeedleRollerBearingsarebasedonJISB2402-1.TolerancesofoutsidediameterandwidtharebasedonTables2and3,respectively.Table2Toleranceofoutsidediameterunit:mmNominaloutsidediameterToleranceIncl.305080120High+0.09+0.11+0.14+0.17Low+0.04+0.05+0.06+0.08Over0-35080Table3Toleranceofwidthunit:mmNominalsizeofwidthToleranceIncl.610High+0.2+0.3Low-0.2-0.3Over-6â– FeaturesthesesealsaremanufacturedtoforNeedleRollerBearingshavealowIKOSealssectionalheightandconsistofasheetmetalringandspecialsyntheticrubber.thesamesec-AsIKONeedleRollerBearings,greasetionalheightasleakageandforeignparticlescanbeeffectivelypreventedbyfittingthemdirectlytothesidesofcombinablebearingsshowninthedimensiontable.Whenfittingsealstoneedlerollerbearingswithinnerring,wideinnerrings(seepageH2)mustbeused,asshowninthemountingexamples.thepenetrationofâ– TypesforNeedleRollerBearingsareavailableasSealsshowninTable1.Table1SealtypeTypeSinglelipDoublelipsMetalringMetalringStructureLipSecondarylipMainlipModelcodeOSDSL1
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