Bearing types: 51100 ~51128series 51200~51228 series 51304~51320series 51405~51412 series Features: 1)Thrust ball bearings are available as both single and bi-directional types. The bi-directional thrust bearing incorporates a third washer and an additional set of balls. This center washer is located in the axial direction by a shaft shoulder and sleeve. 2)Thrust ball bearings has included trust angular contact ball bearing. Typical applications: live centers in lathes, lead screws, automotive clutches, peed reducers