120BS21 Sprocket With 1" Finished Bore 100B9 Sprockets This 120BS28 sprocket features a

This 120BS28 sprocket features a 2" finished bore with a key-way and two set screws

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

While the phosphate coated and then painted finish adds corrosion resistance to the 10C95J sheave

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

This 120SF13 sprocket is a durable

120BS21 Sprocket With 1" Finished Bore 100B9 Sprockets This 120BS28 sprocket features aThis 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