>> P.300
CalculatingformulaoflifeStaticsafetyfactorTheratinglifecalculationformulasareshownbelow.LinearWayL=50(C―P)3LinearRollerWayL=50(C―P)10/3where,L:Ratinglife,103mC:Basicdynamicloadrating,NP:Dynamicequivalentload,N(1)(2)Generally,basicstaticloadratingandstaticmomentratingisconsideredasloadattheallowablelimitfornormalrollingmotion.However,staticsafetyfactormustbeconsideredaccordingtooperatingconditionsandrequiredperformanceofthelinearmotionrollingguide.StaticsafetyfollowingequationandtypicalvaluesareindicatedinTables2.1and2.2.Equation(5)isarepresentativeequationforamomentload.Momentloadandstaticmomentratingineachdirectionisappliedforthecalculation.factorcanbeobtainedbytheLifetimecanbecalculatedbyapplyingastrokelengthandanumberofstrokesperminutetotheformulabelow.fS=C0―P0Lh=106L2Sn1×60(3)fS=T0―M0(4)(5)where,Lh:Ratinglifeinhours,hS:Strokelength,mmn1:Numberofstrokesperminute,min-1LoadfactorLoadappliedtoalinearmotionrollingguidecanbelargerthantheoreticalloadduetomachinevibrationorshock.Generally,theappliedloadisobtainedbymultiplyingitbytheloadfactorindicatedinTable1.Table1LoadfactorOperatingconditionsSmoothoperationfreefromshockNormaloperationOperationwithshockloadfW1～1.21.2～1.51.5～3where,fS:StaticsafetyfactorC0:Basicstaticloadrating,NP0:Staticequivalentload,NT0:Staticmomentrating,N・mM0:Momentloadineachdirection,N・m(maximummomentload)Table2.1StaticsafetyfactorforLinearWayOperationalconditionsOperationwithvibrationand/orshockHighoperatingperformanceNormaloperatingconditionsfs3～52～41～3Table2.2StaticsafetyfactorforLinearRollerWayOperationalconditionsOperationwithvibrationand/orshockHighoperatingperformanceNormaloperatingconditionsfs4～6～532.5～31N=0.102kgf=0.2248lbs.1mm=0.03937inchⅢ-6
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