50BS58 Sprocket With 1" Finished Bore 4.75" Stock Bore This 4C300F Sheave uses a

This 4C300F Sheave uses a F QD bushing

This 40BS53 sprocket features a 1-3/16" finished bore including a key-way and two setscrews

6300-2RS Ball Bearing Dimensions

Dimension (W): 137

This 1TB90 Pulley uses a P1-Series Bushing

50BS58 Sprocket With 1" Finished Bore 4.75" Stock Bore This 4C300F Sheave uses aThis 50BS58 sprocket features a 1" finished bore including a key way and two setscrews. It is a durable, high quality, and precision sprocket that fully meets all ANSI Standards which insures proper contact between the #50 roller chain and sprocket thus preventing premature wear or breakage. This sprocket is also black oxide coated which increases resistance to the environment and will prevent early rust build up. We also offer stock bore sprockets,