>> P.185
IdentificationNumberandSpecificationTable1ModelsandsizesofSTseriesShapeSealstructureModel4568101216202530354045505560708090100SizeOrdinarytypeOpentypeST○○○○○○○○○○○○○○○○○○○○WithsealST…UU---○○○○○○○○○○○○○○○○○HeavyloadtypeOpentypeST…B---○○○○○○○○○○○○○○○○○WithsealST…UUB---------○○○○○○○○○○○AccuracySinceoutsidediameterofexternalcylinderisdeformedbystopringtension,calculatethemeasurementpointfromtheequation(1)andusetheaveragediametervalueatthepoint.W=4+L1/8(1)where,W:DistancefromtheendtomeasurementpointP,mm(seeFig.1)L1:Externalcylinderlength,mmTable3Toleranceofexternalcylinderlengthunit:μmNominaldimensionsofinscribedcirclediameterFwmmDim.L1toleranceofexternalcylinderlengthOver─2060Incl.2060100High000Low-200-300-400L1PWStopring.giF1Table2Toleranceofinscribedcirclediameterandoutsidediameterofexternalcylinderunit:μmNominaldimensionsofinscribedcirclediameterFworoutsidediameterofexternalcylinderDmmOverIncl.36101830508012061018305080120150ToleranceofinscribedcirclediameterFwToleranceofoutsidediameterofexternalcylinderDm(1)High+18+22+27+33+41+49+58─Low+10+13+16+20+25+30+36─High─0000000Low─- 8- 8- 9-11-13-15-18Note(1)Dmisanarithmeticmeanvalueofthemaximumdiameterandminimumdiameterobtainedbytwo-pointmeasurementoftheoutsidediameterofexternalcylinder.Ⅱ-177AllowanceofVelocityTheSTseriesiscapableofrotationandrotaryandlinearmotion.However,allowanceofvelocityforthesemotionsperformedatthesametimeisobtainedfromtheequation(2).TypicalvaluesareindicatedinTable4.DN≧Dpwn+10Sn1(2)DN:Allowanceofvelocity(seeTable4)n:Rotationalspeed,min-1n1:Numberofstrokesperminute,min-1S:Strokelength,mmwhere,However,applicablewhenn1≦5000,Sn1≦50000.Dpw:Pitchcirclediameterofballs,mm(Dpw≒1.15Fw)Fw:Inscribedcirclediameter,mmTable4AllowanceofvelocityLubricationconditionsOillubricationGreaselubricationDN600000300000
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