120BS21 Sprocket With 1" Finished Bore 100B9 Sprockets 10B21 sprockets with a stock

10B21 sprockets with a stock bore comes with the standard 16 millimeter inside diameter hole with no key-way or set screws and can be easily machine bored to custom sizes

120R30 sprockets are bored to accept a R1 type taper bushing

This 100Q20 sprocket is a durable

This 120J70 sprocket is a durable

120BS21 Sprocket With 1" Finished Bore 100B9 Sprockets 10B21 sprockets with a stockThis 120BS21 sprocket features a 1" finished bore with a key way and two set screws. It is a durable, high quality, and precision sprocket with 21 teeth. Something that is notable about this 120BS21 sprocket is that it fully meets all ANSI Standards, which insures proper contact between the #120 roller chain and sprocket thus preventing premature wear or breakage. This sprocket is also black oxide coated which increases resistance to the environment