>> P.26
Ⅱ-181N=0.102kgf=0.2248lbs.1mm=0.03937inch(2)ForSize1seriesThestrokelengthisregulatedbycageandendstopperandthecagelengthisobtainedbythefollowingequation.R=L-S12(17)WhereR:AllowablecagelengthmmL:WaylengthmmS1:MaximumstrokelengthmmThenumberofrollerstobeincorporatedinarollercageisobtainedbythefollowingequation.Z=R-2e+1p(18)WhereZ:umberofcylindricalrollers(figuresafterthedecimalfractionsareomitted)R:Allowablecagelengthmme:nddimensionofcage(refertothedimensiontable)mmp:nter-pitchdimensionsofcylindricalrollers(refertothedimensiontable)mm(3)ForendstopperSBandwipersealThestrokelengthisregulatedbycageandendstopperorwipersealandthecagelengthisobtainedbythefollowingequation.R=L-t2-S1(19)WhereR:AllowablecagelengthmmL:WaylengthmmS1Maximumstrokelengthmmt2:hicknessofendstopperSBorwipersealmm(SeeTable6inpageⅡ-13,andTable7inpageⅡ-14)Thenumberofrollerstobeincorporatedinarollercageisobtainedbytheequation(18)aswiththeSize1series.LLRS1/2S1/2S1RLS1t2CalculationexamplesFormofuse…………………………………………CRW6Appliedload…………………………………………P=7000NStrokelength…………………………………………S=195mmSelectspecificationsforparalleluseofCrossedRollerWayundertheaboveconditions(refertoFig.26inpageⅡ-23).❶CalculationofwaylengthThewaylengthLiscalculatedfromtheequation(13).L≧1.5S=1.5×195=292.5Therefore,selectL=300mmbasedonthestandardlengthinthedimensiontable.❷CalculationofmaximumstrokelengthThemaximumstrokelengthS1iscalculatedfromtheequation(14).S1≧1S=10.80.8×195≒244AllowabledimensionsbetweenrollersatbothendsLRiscalculatedfromtheequation(15).LR=L-S1=300-24422=178❸CalculationofthenumberofrollersThenumberofcylindricalrollersZiscalculatedfromtheequation(16).However,DWandpinthisformareDW=6mm、p=9mmaccordingtothedimensiontable.Z=LR-DW+1=178-6p9+1≒20.1Therefore,itshouldbeZ=20byomittingfiguresafterthedecimalfractions.❹CalculationofallowableloadAllowableloadinparallelarrangementFiscalculatedfromequation(9)describedinTable8.2inpageⅡ-16.However,allowableloadpercylindricalrollerFUisFU=769Naccordingtothedimensiontable.F=2(Z―2)FU=2(20―2)×769=15380Therefore,allowableloadFislargerthanappliedloadP=7000N.Whenallowableloadbecomessmallerthanappliedload,itisnecessarytoincreasethenumberofcylindricalrollersbyextendingwaylength,orincreasethecylindricalrollerdiameter.❺DeterminationofspecificationsSpecificationsobtainedinaccordancewiththeaboveisCRW6-300andthenumberofcylindricalrollersis20.
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