... KOYO, INA,etcChinese brand: ZWZ, TWB, WGB, TR, etcFeatures : Thrust ball bearings consist of two precision chrome steel washers (ring) and ... directional thrust bearing incorporates a third washer and an additional set of balls. This center washer is located in the ... in handling to prevent damage to the separable rings and ball assemblies.Applications : live centers in lathes, lead screws, automotive ...