>> P.316
Ⅲ-221N=0.102kgf=0.2248lbs.1mm=0.03937inchGreasereplenishmentintervalThequalityofanygreasewillgraduallydeteriorateasoperatingtimepasses.Therefore,periodicreplenishmentisnecessary.Greasereplenishmentintervalvariesdependingontheoperatingconditions.Asixmonthintervalisgenerallyrecommended,andifthemachineoperationconsistsofreciprocatingmotionswithmanycyclesandlongstrokes,replenishmenteverythreemonthisrecommended.Inaddition,linearmotionrollingguidesinwhichthelubricationpart"C-Lube"isbuiltdeliverlong-termmaintenancefreeperformance.Thiseliminatestheneedforlubricationmechanismandworkloadwhichusedtobenecessaryforlinearmotionrollingguidesandsignificantlyreducesmaintenancecost.GreasereplenishmentmethodNewgreasemustbesuppliedthroughagreasefeeddevicesuchasagreasenippleuntiloldgreaseisdischarged.Aftergreaseisreplenished,running-inisperformedandexcessgreasewillbedischargedtooutsideofthelinearmotionrollingguide.Dischargedgreasemustthenberemovedbeforestartingtheoperation.Theamountofgreaserequiredforstandardreplenishmentisabout1/3to1/2ofthefreespaceinsidethelinearmotionrollingguide.Whengreaseissuppliedfromagreasenippleforthefirsttime,therewillbegreaselostinthereplenishmentpath.Theamountlostshouldbetakenintoconsideration.Generally,immediatelyaftergreaseisreplenished,frictionalresistancetendstoincrease.Ifadditionalrunning-inisperformedfor10to20reciprocatingcyclesafterexcessgreaseisdischarged,frictionalresistancebecomessmallandstable.Forapplicationswherelowfrictionalresistanceisrequired,thereplenishmentamountofgreasemaybereduced,butitmustbekepttoanappropriatelevelsoasnottogiveabadinfluenceonthelubricationperformance.MixingofdifferenttypeofgreaseMixingdifferenttypesofgreasemayresultinchangingthepropertiesofbaseoil,soapbase,oradditivesused,and,insomecases,severelydeterioratethelubricationperformanceorcausetroubleduetochemicalchangesofadditives.Oldgreaseshouldthereforeberemovedthoroughlybeforefillingwithnewgrease.Lubricationpart"C-Lube"C-Lubeisaporousresinwithmoldingformedfineresinpowder.Itisalubricationpartimpregnatedwithalargeamountoflubricationoilinitsopenporesbycapillaryinside.Lubricationoilissupplieddirectlytoballs(steelballs)orrollers(cylindricalrollers),nottothetrackrail.WhentheballsorrollershavecontactwithC-Lubebuiltintheslideunit,lubricationoilissuppliedtothesurfaceoftheballsorrollers.Astheballsorrollerscirculate,thelubricantisdistributedtotheloadingareaalongthetrackrail.Thisresultsinadequatelubricationoilbeingproperlymaintainedintheloadingareaandlubricationperformancewilllastforalongtime.ThesurfaceofC-Lubeisalwayscoveredwiththelubricationoil.LubricationoiliscontinuouslysuppliedtothesurfaceofballsorrollersbysurfacetensioninthecontactofC-Lubesurfaceandballsorrollers.OillubricationForoillubrication,heavyloadrequireshighoilviscosityandhighvelocityrequireslowoilviscosity.Generally,forlinearmotionrollingguidesoperatingunderheavyload,lubricationoilwithaviscosityofabout68mm2/sisused.Forlinearmotionrollingguidesunderlightloadathigh-speedoperation,lubricationoilwithaviscosityofabout13mm2/sisused.Table12GreasebrandsusedinlinearmotionrollingguideBrandBaseoilThickenerConsistencyRangeofoperatingtemperature(2)Usage℃AlvaniaEPGrease2[ShellLubricantsJapanK.K.]MineraloilLithium284-20～110Generalapplicationwithextreme-pressureadditiveAlvaniaGreaseS2[ShellLubricantsJapanK.K.]MineraloilLithium283-25～120GeneralapplicationMULTEMPPSNo.2[KYODOYUSHICO.,LTD.]Syntheticoil,MineraloilLithium275-50～130GeneralapplicationLowDust-GenerationGreaseforCleanEnvironmentCG2[NIPPONTHOMPSONCO.,LTD.]SyntheticoilUrea280-40～200ForcleanenvironmentLonglifeLowDust-GenerationGreaseforCleanEnvironmentCGL[NIPPONTHOMPSONCO.,LTD.]Syntheticoil,MineraloilLithium/Calcium225-30～120ForcleanenvironmentLowslidingKlüberalfaGRY-VAC3(1)[NOKKLUEBER]SyntheticoilEthylenetetra-fluorideNo.3-20～250ForvacuumAnti-FrettingCorrosionGreaseAF2[NIPPONTHOMPSONCO.,LTD.]SyntheticoilUrea285-50～170Fretting-proof6459GreaseN[ShellLubricantsJapanK.K.]MineraloilPoly-urea305-Fretting-proofNotes(1)Setreplenishmentintervalstoshort.(2)herangesofoperatingtemperaturearequotedfromthegreasemanufacturer'scatalogedvalues,butdonotguaranteeregularuseunderhightemperatureenvironment.Remarksheckwiththechosengreasemanufacturer'scatalogbeforeuse.Forgreaseforapplicationsotherthanthoselisted,pleasecontactIKO.
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