NKE Hauptkatalog / General Catalogue 2011

DesignationSystemSuffixes of Cage DesignWhen a cage is the “primary or standard” one fittedwithin a bearing no cage suffix coding is shown.Therefore, where designs and materials of cagesdiffer from the standard the bearing designationwill have defining suffixes. The following are somesuffi xes used.Cage MaterialsJ Pressed steel cagespressed steel cages are the standard cage ofmany bearing types.Thus pressed steel cages in most cases donot indicate a separate suffi x.M Solid brass cageF Solid cage made from steel or ironTV Polyamide cageNormally polyamide 6.6 with or without glassfi bres is used.Cage DesignsCage design symbols are normally used inconjunction with the cage material symbols.Examples:MBInner ring guided solid brass cageMPB Inner ring guided solid brass cage,designed as window one piece type.MAS Outer ring guided solid brass cage withlubricating slots in the guiding surfaces.Where there are numbers following the cagesymbol, these may indicate design variants of thatcage type.Examples:M6Roller guided solid brass cage for cylindricalroller bearings, cage body designed withtrapezoid-shaped machined rivets.MA6 Outer ring guided solid brass cage forcylindrical roller bearings, cage body designedwith trapezoid-shaped machined rivets.Bearings without CagesUnder certain circumstances a bearing may beused without cages.In such cases the bearings are full complement.PHABSWindow-type cageClaw-type cageCage guided on the bearing outer ringCage guided on the bearing inner ringCage with lubricating slots in the guidingsurfaces.Full complement bearings are identified by thefollowing suffi xes:VVHfull complement ball or roller bearingfull complement cylindrical rollerbearing with self retaining roller set.Tolerance ClassesRolling element bearings are produced in differenttolerance classes.Bearings of the standard tolerance class PNfulfil the demands of general machinery in respectto their running and dimensional accuracy.www.nke.at 219