... consist of two precision chrome steel washers (ring) and a ball complement spaced by bronze retainer. They can be supplied ... contain raceways for the balls. Thrust ball bearings are available as both single and bi-directional types. The bi-directional ... taken in handling to prevent damage to the separable rings and ball assemblies. Specifications: 51100, 51200, 51300, 51400, 52200, 52300, 52400n ...