>> P.146
Ⅱ-138PrecautionforUseMomentofInertiaofSectionalAreaandSectionCoefficientofShaftwithGroovedRacewayLubricationDustProtectionGreaseisnotpre-packedintheLMGseries,sopleaseperformadequatelubricationasneeded.BothoillubricationandgreaselubricationareavailableintheLMGseries.Forgreaselubrication,useofhigh-qualitylithium-soapbasegreaseisrecommended.NodustprotectionsealisprovidedforLMGseries.Forapplicationsinotherthancleanenvironment,covertheentireunitwithaprotectivecase,etc.topreventharmfulforeignsubstancessuchasdustandparticlesfromoutsidefromentering.Thespecialspecificationwithendseals(supplementalcode/U)hasadustprotectioneffect.However,iflargeamountofcontaminantordustarefloating,oriflargeparticlesofforeignsubstancessuchaschipsorsandmayadheretotheshaftwithgroovedraceway,itisrecommendedtoattachaprotectivecovertothelinearmotionmechanism.❶FittingofexternalcylinderGenerally,clearancefit(H7)isrecommendedforfittingbetweentheexternalcylinderandthehousingbore.Thetransitionfit(J7)maybeappliedforspecialuse.❷TypicalmountingstructureMountingexamplesoftheexternalcylinderareshowninFig.1.Thefixingthreaddepthofmountingscrewsfortheexternalcylindermustnotexceedthemaximumfixingthreaddepthindicatedinthedimensiontable.Sincethescrewholefortheexternalcylinderispenetrated,theshaftwithgroovedracewaywillbepushedbythescrewifthefixingthreaddepthistoodeep,andtherunningaccuracyandlifewillbeadverselyaffected.Fig.1Mountingexamplesofexternalcylinder❸MultipleexternalcylindersusedincloseproximityWhenusingmultipleexternalcylindersinclosedistancetothesamehousing,itisrecommendedtoensurethatthedistancebetweentheexternalcylindersisthreetimesaslongasthelengthoftheexternalcylinder.Whenusingmultipleexternalcylindersincloserdistance,contactIKO.❹LoadedconditionwithrotatingtorqueUseIKOLinearBallSplineGunderloadedconditionswitharotatingtorquebi-directionallyorrepeatedly.❺OperatingtemperatureThemaximumoperatingtemperatureis120˚Candtemperatureupto100˚Cisallowedforcontinuousoperation.Whenthetemperatureexceeds100˚C,contactIKO.❻MountingofexternalcylinderWhenpress-fittingtheexternalcylindertothehousing,assemblethemcorrectlybyusingapressandasuitablejigfixture.(SeeFig.2.)Fig.2Press-fittingofexternalcylinderTable5omentofinertiaofsectionalareaandsectioncoefficientofshaftwithgroovedracewaySizeMomentofinertiaofsectionalareaSectioncoefficientmm4mm3SolidshaftHollowshaftSolidshaftHollowshaft660592020819019049481047046095931313601300210200163130293039036020772072307707201N=0.102kgf=0.2248lbs.1mm=0.03937inch
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