>> P.532
L23■FeaturesIKONeedleRollersaremadeofhighcarbonchromi-umbearingsteel.Theyarerigidandhighlyaccurateandarefinishedtoahardnessof58HRCormore(SeeTable1.)andasurfaceroughnessof0.1μmRaorless.Theseneedlerollersarewidelyusedasrollingele-mentsforbearings,andalsoaspinsandshafts.PleasecontactIKO,ifNeedleRollersmadeofstain-lesssteelarerequired.■EndShapesNeedleRollerscomeinsphericalandflatendshapes,asshowninTable2.PleasecontactIKO,ifothershapesarerequired.■AccuracyThedimensionalaccuracyofNeedleRollersconformstoJISB1506 (Rollingbearings-Rollers),andisshowninTable3.Theselectiveclassificationforthemeandiametertol-eranceisshowninTable4.Theselectiveclassifica-tionrollersaccordingtoTable4canbeprovidedasrequested.Table2ShapesofendsTypeSphericalendFlatendShapesSymbolAFTable1HardnessNominaldiameterDw mmOverIncl.HRCHVHardness-33-(60〜67)58〜66697〜900(653〜865)Remarks1. Hardnessisflatsurfacehardness.2. Thevaluesinparenthesesareconvertedvaluesforreference.Table4ClassificationofneedlerollersClassificationsymbolToleranceformeandia.C3B2B4B6B8B100〜- 30〜- 2-2〜- 4-4〜- 6-6〜- 8-8〜-10unit:μmTable3DimensionalaccuracyofneedlerollersClassDiametervaria-tioninasingleradialplane(1)VDwp(Max.)Circularity(1)∆R(Max.)Gaugelotdiametervariation(1)VDwL(Max.)Deviationofasinglelength(2)∆Lws23511.5211.52.5235h13h13h13unit:μmNotes(1) Applicabletothemeasurementatthecenterofrollerlength(2) ToleranceisbasedontheclassificationaccordingtothenominallengthLw.Remark Anymeasureddiameteralongthetotallengthofrollermustnotbelargerthantheactualmaximumdiameteratthecenterofrollerlengthbytheamountexceedingthevaluesgivenbelow.0.5μmforClass20.8μmforClass3 1μmforClass5
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