This is the same radius-faced bearing as supplied with many Tilton hydraulic release bearing assemblies, including Part Nos, 163-53, and 163-57.
The 44mm (1.75") contact diameter works with Tilton 7 1/4" OT-II clutches, QuarterMaster 5.5" clutches, and QuarterMaster 7 1/4" clutches (except Low Ground Clearance versions).
This bearing can be used with outer race press fit pistons (as on 163-53 and 163-57) or self-centering pistons (as on TE 61-302). Includes nylon washer and circlip for self-centering installations. The inner race rotates with the clutch in all installations. Insert length 0.197".