1. with one-way, two types of two-way 2. quality steel - the highest use can extend bearing life ... : ZWZ, TWB, WGB, TR, etcFeatures : Thrust ball bearings consist of two precision chrome steel washers (ring) and a ball complement spaced ... are called shaft washers, and those mounted in the housing are called housing washers. Both washers contain raceways for the balls.Thrust ...