Bearing types: 51100 series 51200 series 51300 series 52200 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, speed reducers packing: Standard packing Or according your requirement