>> P.23
LoadRatingandAllowableLoadC,C0,F.giF5DirectionofloadratingoftheCRWGseriesandCRWG…HseriesBasicdynamicloadratingC,basicstaticloadratingC0,andallowableloadFoftheCRWGseriesandCRWG…Hseriesshowvaluesfordownwardloadsincaseofparallelarrangementoffourwaysandtwopairsofrollercagesasoneset.(RefertoFig.5)Inaddition,theupwardandlateralloadratingisthesameasdownwardloadrating.FortheCRWseries,sincethenumberofcylindricalrollersthatshareloadofeachdirectionvaries,theloadratingforeachloaddirectionandallowableloadmustbeobtained.Inaddition,basicdynamicloadratingCU,basicstaticloadratingC0U,andallowableloadFUinthedimensiontableshowvaluespercylindricalroller.BasicdynamicloadratingC,basicstaticloadratingC0,andallowableloadFoftheCRWseriesareobtainedbasedontheequationindicatedinTable8.1andTable8.2.Formoreinformationonthedefinitionofloadratingandcalculatedload,seepageⅢ-3.AllowableloadAllowableloadreferstoloadofsmoothrollingmotiononcontactsurfacetowhichmaximumcontactstressisappliedandthesumofwhoseelasticdeformationofrollingelementsandracewayissmall.Therefore,useappliedloadwithintheallowableloadrangeifverysmoothrollingmotionandhighaccuracyarerequired.Table8.1CalculatingformulaofloadratingandallowableloadofstandardtypeCRWseriesUpwardanddownwardload(1)LateralloadLoadLoadLoadLoad={(Z―2-1)2p}1/36(Z―2)3/4CUC=(Z―2)C0r0UF=(Z―2)FrU(1)(2)(3)C={(Z―2-1)2p}1/36(Z―2)3/4a27/9CU=2(Z―2)C0UC0aF=2(Z―2)FaU(4)(5)(6)LoaddirectionBasicdynamicloadratingCNCrBasicstaticloadratingC0NAllowableloadFNCodedescriptionCr:BasicdynamicloadratingincaseupwardanddownwardloadisappliedNCa:BasicdynamicloadratingincaselateralloadisappliedNC0r:BasicstaticloadratingincaseupwardanddownwardloadisappliedNC0a:BasicstaticloadratingincaselateralloadisappliedNFr:AllowableloadincaseupwardanddownwardloadisappliedNFa:AllowableloadincaselateralloadisappliedNZ:Thenumberofcylindricalrollersincorporatedinarollercage(omitthefiguresafterthedecimalfractionsforZ―2)p:Inter-pitchdimensionsofcylindricalrollersmmCU:BasicdynamicloadratingpercylindricalrollerNC0U:BasicstaticloadratingpercylindricalrollerNFU:AllowableloadpercylindricalrollerNNote(1):Incaseofparallelarrangementinthisloaddirection,calculationmustbeperformedbasedontheequations(7),(8),and(9)inTable8.2.Ⅱ-15
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