120BS20H Sprocket With 1-1/4" Finished Bore Single Strand Metric Roller Chain and precision 42 tooth sprocket

and precision 42 tooth sprocket that is manufactured to accept a F bushing

Bore: 1/2"

100B28H sprockets with a stock bore comes with the standard 1-1/4" inside diameter hole with no keyway or set screws and can be easily machine bored to custom sizes

100Q25 sprockets are bored to accept a Q1 type taper bushing

100A41 sprockets with a stock bore comes with a 1-1/4" inside diameter plain hole and can be easily machine bored to custom sizes

120BS20H Sprocket With 1-1/4" Finished Bore Single Strand Metric Roller Chain and precision 42 tooth sprocketThis 120BS20H sprocket features a 1 1 4" finished bore with a key way and two set screws. It is a durable, high quality, and precision sprocket with 20 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 120BS20H sprocket is that it fully meets all ANSI Standards, which insures proper contact between the #120 roller chain and sprocket thus preventing