>> P.27
Ⅱ-19LubricationPrecautionforUseGreaseisnotpre-packedintheCRWGseries,CRWG…HseriesandCRWseries,sopleaseperformadequatelubricationasneeded.BothofoillubricationandgreaselubricationareavailableintheCRWGseries,CRWG…HseriesandCRWseries.Generally,oillubricationshouldbeselectedforhighspeedorlowfrictionalresistance,andgreaselubricationforlowspeed.Forgreaselubrication,useofhigh-qualitylithium-soapbasegreaseisrecommended.Forlightloadandlowspeed,applygreaseoroiltoraceway,rackandpiniongearfirstandthenreapplyaccordingly.However,thestructureasindicatedintheFig.6allowsforeasyreapplication.Inaddition,sincetheclearancebetweenwaysissmallforCRWG…Hseries,applygreaseoroildirectlytoracewayforre-greasing.Fig.6ExampleoflubricationsystemSincetheCRWGseries,CRWG…HseriesandCRWseriesarefinishedwithhighaccuracy,harmfulforeignsubstancessuchasdustandparticlesenteringintothebearingwillcauselowlifeorimpairedaccuracy.Topreventharmfulforeignsubstancessuchasdust,particlesandwaterfromoutsidefromentering,itisrecommendedtoattachnon-contacttypelabyrinthsealasindicatedinFig.7,orcontacttypewipersealasindicatedintheFig.8tobothsides.Fig.7ExampleoflabyrinthsealFig.8Exampleofwiperseal❶HandlingAstheCRWGseries,CRWG…HseriesandCRWseriesaredesignedhighlyprecisely,takeextracareforhandling.ApiniongearandcylindricalrollerareincorporatedwiththecagefortheCRWGseriesandCRWG…Hseries.Whenthecageisdroppedorhandledroughly,thepiniongearandcylindricalrollermaycomeoff.EspeciallyforCRWG…H,grabbingthecylindricalrollermaytakeitoff,sobesuretoholdthecagebodyforhandling.Inaddition,donotcutoffthecageasdoingsomaycausepiniongearcomingoffandbreakageofgearjointsection.ArackisincorporatedwiththewayfortheCRWGseriesandCRWG…Hseries.Inoperation,takenotethattherackmaycomeoffwhentheendscrewisremoved.ThoughthecagefortheCRWseriesmaycutofftonecessarylength,handleitwithcarenottodeformitwhencutting.❷AccuracyofmountingpartExamplesoftypicalmountingsurfaceprocessingareshowninFig.9.1andFig.9.2.GeneralprocessingaccuracyofmountingsurfaceisaccordingtoTable9.However,careshouldbeexercisedasmountingsurfaceaccuracydirectlyaffectsrunningaccuracy.Especiallywhenhighrunningaccuracyisrequired,theprocessingaccuracyhigherthanthatindicatedinTable9isrequired.Fig.9.1ExampleofprocessingofCRWG,CRWG…HandCRWmountingsurfaceFig.9.2ExampleofprocessingofCRWMmountingsurfaceAAAABBCAACDustProtection
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