... Needle roller bearings with angular contact ball bearings : 1, Metal stamping(TLA, TA, TLA=HK) 2, Steel plat(NA, TAF, NATA5902 Needle roller bearings with angular contact ball bearings ... F6 before the fitting of outer ring with cage and roller assembly.Bearing radial running clearance conforms ... :Material for needle roller is GCr15 bearing steel, quench-hardening HRC60---65.Material for inner and outer ...