>> P.26
(2)ForSize1seriesThestrokelengthisregulatedbycageandendstopperandthecagelengthisobtainedbythefollowingequation.R=L-S12(17)WhereR:AllowablecagelengthmmL:WaylengthmmS1:MaximumstrokelengthmmLS1S1/2S1/2RLCalculationexamplesFormofuse…………………………………………CRW6Appliedload…………………………………………P=7000NStrokelength…………………………………………S=195mmSelectspecificationsforparalleluseofCrossedRollerWayundertheaboveconditions(refertoFig.26inpageⅡ-23).❶CalculationofwaylengthThewaylengthLiscalculatedfromtheequation(13).L≧1.5S=1.5×195=292.5Therefore,selectL=300mmbasedonthestandardlengthinthedimensiontable.❷CalculationofmaximumstrokelengthThemaximumstrokeequation(14).lengthS1iscalculatedfromtheThenumberofrollerstobeincorporatedinarollercageisobtainedbythefollowingequation.S1≧10.8S=10.8×195≒244Z=R-2e+1p(18)AllowabledimensionsbetweenrollersatbothendsLRiscalculatedfromtheequation(15).WhereZ:Numberofcylindricalrollers(figuresafterthedecimalfractionsareomitted)R:Allowablecagelengthmme:Enddimensionofcage(refertothedimensiontable)mmp:Inter-pitchdimensionsofcylindricalrollers(refertothedimensiontable)mm(3)ForendstopperSBandwipersealThestrokelengthisregulatedbycageandendstopperorwipersealandthecagelengthisobtainedbythefollowingequation.R=L-t2-S1(19)WhereR:AllowablecagelengthmmL:WaylengthmmS1:Maximumstrokelengthmmt2:ThicknessofendstopperSBorwipersealmm(SeeTable6inpageⅡ-13,andTable7inpageⅡ-14)S1t2RLThenumberofrollerstobeincorporatedinarollercageisobtainedbytheequation(18)aswiththeSize1series.LR=L-S12=300-2442=178❸CalculationofthenumberofrollersThenumberofcylindricalrollersZiscalculatedfromtheformareequationDW=6mm、p=9mmaccordingtothedimensiontable.(16).However,DWandpthisinZ=LR-DWp+1=178-69+1≒20.1Therefore,itshouldbeZ=20byomittingfiguresafterthedecimalfractions.❹CalculationofallowableloadAllowableloadinparallelarrangementFiscalculatedfromequation(9)describedinTable8.2inpageⅡ-16.However,isFU=769Nallowableaccordingtothedimensiontable.loadpercylindricalrollerFUF=2(Z―2)FU=2(20―2)×769=15380Therefore,allowableloadFislargerthanappliedloadP=7000N.Whenallowableloadbecomessmallerthanappliedload,itisnecessarytoincreasethenumberofcylindricalrollersbyextendingwaylength,orincreasethecylindricalrollerdiameter.❺DeterminationofspecificationsSpecificationsobtainedinaccordancewiththeaboveisCRW6-300andthenumberofcylindricalrollersis20.1N=0.102kgf=0.2248lbs.1mm=0.03937inchⅡ-18
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