>> P.510
L1â– FeaturesIKOSealsforNeedleRollerBearingshavealowsectionalheightandconsistofasheetmetalringandspecialsyntheticrubber.Asthesesealsaremanufacturedtothesamesec-tionalheightasIKONeedleRollerBearings,greaseleakageandthepenetrationofforeignparticlescanbeeffectivelypreventedbyfittingthemdirectlytothesidesofcombinablebearingsshowninthedimensiontable.Whenfittingsealstoneedlerollerbearingswithinnerring,wideinnerrings(seepageH2)mustbeused,asshowninthemountingexamples.â– TypesSealsforNeedleRollerBearingsareavailableasshowninTable1.â– IdentificationNumberTheidentificationnumberofSealsforNeedleRollerBearingsconsistsofamodelcodeanddimensions.Anexampleofanidentificationnumberisshownasfollows.ModelcodeDimensionsDS20428Exampleofidenti(cid:17)cationnumberShaftdia.(20mm)TypeofsealOutsidedia.ofseal(28mm)Widthofseal(4mm)â– AccuracyTolerancesofSealsforNeedleRollerBearingsarebasedonJISB2402-1.TolerancesofoutsidediameterandwidtharebasedonTables2and3,respectively.Table1SealtypeTypeSinglelipDoublelipsStructureModelcodeOSDSTable2ToleranceofoutsidediameterNominaloutsidediameterOverIncl.HighLowTolerance-305080305080120+0.09+0.11+0.14+0.17+0.04+0.05+0.06+0.08unit:mmTable3ToleranceofwidthNominalsizeofwidthOverIncl.HighLowTolerance-6610+0.2+0.3-0.2-0.3unit:mmMetalringLipMetalringMainlipSecondarylip
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