>> P.144
Ⅱ-136AccuracyInternalClearanceTheinternalclearanceofLMGseriesisapproximately10μm.Table3Allowablevaluesoftotalradialrunoutofshaftwithgroovedracewayaxiallineunit:μmOveralllengthofshaftwithgroovedracewaymmSizeOverIncl.68101316,20-200142142129129126200315203203153153141315400-255173173153400500-306193193165500630--221221182630800---2602078001000----240Remark:Thesearevalueswhenaninternalclearanceis0μm.Table2Twistofgrooveswithrespecttoeffectivelengthoftrackgrooveunit:μmAllowablevalue33Remark:hevaluescanbeappliedto100mmoftheeffectivelengthofthetrackgroovepartatanyposition.Table4MeasuringmethodsofaccuracyItemMeasuringmethodIllustrationofmeasuringmethodTwistofgrooveswithrespecttoeffectivelengthoftrackgroove(SeeTable2)Whilesupportingtheshaftwithgroovedraceway,applyaunidirectionaltorsionmomentloadtotheexternalcylinder,placethedialgageprobeverticallytotheshaftwithgroovedracewayonthesidefaceofthemeasuringblockoftwistofgroovesattachedontheexternalcylinder,andmeasurethedeflectionwhentheexternalcylinderandthedialgageprobearemoved100mmintheaxialdirectionatanypositionontheeffectivelengthoftrackgrooveoftheshaftwithgroovedraceway.However,thedialgageprobeshouldbeappliedasnearaspossibletotheouterperipheralfaceoftheexternalcylinder.Totalradialrunoutofaxiallineofshaftwithgroovedraceway(SeeTable3)Whilesupportingtheshaftwithgroovedracewayatitssupportingpartsoratbothcenters,placeadialgageprobeontheouterperipheralfaceoftheexternalcylinder,andmeasurethedeflectionfromonerotationoftheshaftwithgroovedracewayatseveralpositionsintheaxialdirectiontoobtainthemaximumvalue.MeasuringblockoftwistofgroovesReferenceblockfordialgageprobemovement1001N=0.102kgf=0.2248lbs.1mm=0.03937inch
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