... (NA, TAF, TAF=NK) KT182216 Needle Roller Cages for General Usage :Two types:1, Metal stamping(TLA, TA, TLA ... clearance, inscribed circle and precision grade, please contact this company.Materials:Material for needle roller is GCr15 bearing steel, quench ... sealing-element material, operating temperature is -300C---+1000C.For general-disposition design of bearings, refer to the relevant recommendation in ...