... (NA, TAF, TAF=NK) TLA Shell type needle roller bearings :Two types:1, Metal stamping(TLA, TA, ... : 2000. Short delivery time. Manufacturer price, high qualityTypes of Designs:This kind of bearing has ... to tolerance grade F6 before the fitting of outer ring with cage and roller assembly.Bearing radial ... and outer races is GCr15 bearing steel, quench-hardening HRC61---65.Material for cages is quality low ...