>> P.198
IdentificationNumberandSpecificationExampleofanidentificationnumberThespecificationofBGseriesisindicatedbytheidentificationnumber.Indicatetheidentificationnumber,consistingofamodelcodeanddimensions.1BG2253314651234ModelModelcodePageⅡ-190InscribedcirclediameterCircumscribedcirclediameterLengthofretainerDimensionsPageⅡ-190IdentificationNumberandSpecification1234ModelStrokeRotaryCage(BGseries):BGInscribedcirclediameterCircumscribedcirclediameterLengthofretainerIndicatetheinscribedcirclediameterinmm.Indicatethecircumscribedcirclediameterinmm.Indicatethelengthofretainerinmm.AllowanceofVelocityTheBGseriesiscapableofrotationandrotaryandlinearmotion.However,allowanceofvelocityforthesemotionsperformedatthesametimeisobtainedfromtheequation(1).TypicalvaluesareindicatedinTable1.DN≧Dpwn+10Sn1(1)Table1AllowanceofvelocityLubricationconditionsOillubricationGreaselubricationDN600000300000where,DN:Allowanceofvelocity(seeTable1)n:Rotationalspeed,min-1n1:Numberofstrokesperminute,min-1S:Strokelength,mmDpw:Pitchcirclediameterofballs,mm(Dpw=)Fw+Ew2Fw:Inscribedcirclediameter,mmEw:Circumscribedcirclediameter,mmHowever,applicablewhenn1≦5000,Sn1≦50000.Ⅱ-190
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