>> P.6
CharacteristicsofNeedleRollerBearingsBearingscanbeclassifiedintotwomaintypes,namelyrollingbearingsandslidingbearings.Rollingbearingscanbesubdividedfurtherintoballbearingsandrollerbearingsaccordingtotherollingelements.IKONeedleRollerBearingsarehigh-precisionrollingbearingswithalowsectionalheight,incorporatingneedlerollersastherollingelement.Theyhavethefollowingfeatures.MeritsofRollingBearingsMeritsofNeedleRollerBearingsComparedwithslidingbearings,rollingbearingsComparedwithotherrollingbearings,IKONeedlehavethefollowingmerits:RollerBearingshavethefollowingadvantages:Staticandkineticfrictionislow.Withalowsectionalheight,theycanwithstandheavyloads.thebetweendifferenceSinceandkineticfrictionissmallandthefrictionalcoefficientisalsocanbemademorecompactandlightweight,savingmachinecostsandpowerconsumption.small,driveunitsormachinesfrictionstaticlowtheyhaveacomparedSincewithothercanwithstandheavyloads,machinescanbemademorecompactandlightweight,thussavingcosts.rollingbearingsandsectionalheightyetStableaccuracycanbemaintainedforlongperiods.Rotatingtorqueissmall,improvingmechanicalefficiency.Owingmaintainedforlongperiods.wear,lesstostableaccuracycanbeSincetherotatingradiusissmall,therotatingtorqueisalsosmallunderfrictionalconditions,thusimprovingmechanicalefficiency.thesameMachinereliabilityisimproved.Inertiaisminimized.thebearingSincerollingfatigue,machinereliabilityisimproved.lifecanbeestimatedbasedonSincethebearingvolumeandweightaresmall,themomentofinertiaofthebearingisminimizedwhenitisputinmotion.Lubricationissimplified.Mostsuitedtooscillatingmotions.rollingelementsManysmallspacingpitch,andthisconfigurationismostsuitedtooscillatingmotions.arrangedareataSincegreaselubricationissufficientinmostcases,lubricationcanbesimplifiedforeasymaintenance.A3
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