50B17 Sprocket With Stock Bore #120 B-Hub Sprockets This 1B68SDS sheave features one

This 1B68SDS sheave features one groove

This 40BS25 sprocket featured a 1-1/8" finished bore with a key-way and two set screws

Maximum Bore: 20mm

outside of bushing and component (sprocket

Dimension (D): 120mm

50B17 Sprocket With Stock Bore #120 B-Hub Sprockets This 1B68SDS sheave features oneThis 50B17 sprocket is a durable, high quality, and precision sprocket with 17 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 or breakage. This sprocket is also black oxide coated which