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A22Theloadsactingonbearingsincludetheweightofthemachinepartssupportedbythebearings,theweightoftherotatingbody,loadsproducedwhenoperatingthemachine,loadsbybeltsorgearstransmittingpower,andvariousotherloads.Theseloadscanbedividedintoradialloadsperpen-diculartothecentralaxisofthebearingsandaxialloadsparalleltothecentralaxis,andtheyactinde-pendentlyorincombinationwithotherloads.Inaddi-tion,themagnitudeofvibrationorshocksonthebear-ingsvariesdependingontheapplicationofthemachine.Thus,theoreticallycalculatedloadsmaynotalwaysbeaccurateandhavetobecorrectedbymultiplyingvariousempiricalfactorstoobtaintheactualbearingloads.LoaddistributiontobearingsTable5showsexamplesofcalculationswherestaticloadsareactinginradialdirection.LoadfactorAlthoughradialloadsandaxialloadscanbeobtainedbycalculation,itisnotunusualfortheactualbearingloadstoexceedthecalculatedloads,duetovibrationandshocksproducedwhenoperatingthemachine.Theactualbearingloadisobtainedfromthefollowingequation,bymultiplyingthecalculatedloadbytheloadfactor:F= fwFc……………………………………(10)where,F:Bearingload,N fw:Loadfactor(SeeTable6.) Fc:Theoreticallycalculatedload,NTable6LoadfactorSmoothoperationwithoutshocksElectricmotors,Airconditioningequipment,Measuringinstruments,MachinetoolsReductiongearboxes,Vehicles,Textilemachinery,PapermakingmachineryRollingmills,Rockcrushers,Construc-tionmachineryOrdinaryoperationOperationsubjectedtovibrationandshocks1〜1.21.2〜1.51.5〜3OperatingconditionsExamplefwCalculationofBearingLoadsTable5LoaddistributiontobearingsFr1=dKr1+bKr2fFr1=Fr2=gKr1+bKr2-cKr3faKr2+dKr3-eKr1fFr2=cKr1+aKr2fExampleBearingloadabcdfFr1Kr1Kr2Fr2dabcefgKr1Kr2Kr3Fr1Fr2ABCDEFGHIJKLM
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