50BS25 Sprocket With 1-1/8" Finished Bore filter_H50B57 this UCP211 bearing is directly

this UCP211 bearing is directly interchangeable with other brands

This 40BS49 sprocket features a 5/8" finished bore including a key-way and two setscrews

25B32 sprockets with a stock bore comes with the standard 3/8" ID hole with no keyway or setscrews and can be easily machine bored to custom sizes

This 6304-ZZ ball bearing is a high-precision premium quality deep groove shielded 20x52x15 ball bearing made to ABEC 3 precision standards from AXIS

Common Interchanges: 50B48H

50BS25 Sprocket With 1-1/8" Finished Bore filter_H50B57 this UCP211 bearing is directlyThis 50BS25 sprocket featured a 1 1 8" finished bore with a key way and two set screws. It is a durable, high quality, and precision sprocket with hardened teeth. Sprockets that have hardened teeth last longer and are much more durable than those that don't. Something else that is notable about this sprocket is that it fully meets all ANSI Standards, which insures proper contact between the #50 roller chain and sprocket thus preventing premature wear