>> P.300
Ⅲ-61N=0.102kgf=0.2248lbs.1mm=0.03937inchCalculatingformulaoflifeTheratinglifecalculationformulasareshownbelow.LinearWayL=50(C―P)3(1)LinearRollerWayL=50(C―P)10/3(2)where,L:Ratinglife,103mC:Basicdynamicloadrating,NP:Dynamicequivalentload,NLifetimecanbecalculatedbyapplyingastrokelengthandanumberofstrokesperminutetotheformulabelow.Lh=106L2Sn1×60(3)where,Lh:Ratinglifeinhours,hS:Strokelength,mmn1:Numberofstrokesperminute,min-1LoadfactorLoadappliedtoalinearmotionrollingguidecanbelargerthantheoreticalloadduetomachinevibrationorshock.Generally,theappliedloadisobtainedbymultiplyingitbytheloadfactorindicatedinTable1.Table1LoadfactorOperatingconditionsfWSmoothoperationfreefromshock1～1.2Normaloperation1.2～1.5Operationwithshockload1.5～3StaticsafetyfactorGenerally,basicstaticloadratingandstaticmomentratingisconsideredasloadattheallowablelimitfornormalrollingmotion.However,staticsafetyfactormustbeconsideredaccordingtooperatingconditionsandrequiredperformanceofthelinearmotionrollingguide.StaticsafetyfactorcanbeobtainedbythefollowingequationandtypicalvaluesareindicatedinTables2.1and2.2.Equation(5)isarepresentativeequationforamomentload.Momentloadandstaticmomentratingineachdirectionisappliedforthecalculation.fS=C0―P0(4)fS=T0―M0(5)where,fS:StaticsafetyfactorC0:Basicstaticloadrating,NP0:Staticequivalentload,NT0:Staticmomentrating,N・mM0:omentloadineachdirection,N・m(maximummomentload)Table2.1StaticsafetyfactorforLinearWayOperationalconditionsfsOperationwithvibrationand/orshock3～5Highoperatingperformance2～4Normaloperatingconditions1～3Table2.2StaticsafetyfactorforLinearRollerWayOperationalconditionsfsOperationwithvibrationand/orshock4～6Highoperatingperformance3～5Normaloperatingconditions2.5～3
| < 
| 
> | 
>>
