120BS30 Sprocket With 2" Finished Bore American Standard Roller Chain This 100BS23 sprocket features a

This 100BS23 sprocket features a 1-7/16" finished bore with a key-way and two set screws

This 100BS13 sprocket features a 1" finished bore with a key-way and two set screws

and replace to reduce downtime and hassle

10B29 sprockets with a stock bore comes with the standard 20 millimeter inside diameter hole with no key-way or set screws and can be easily machine bored to custom sizes

100BTB26 Sprocket Dimensions

120BS30 Sprocket With 2" Finished Bore American Standard Roller Chain This 100BS23 sprocket features aThis 120BS30 sprocket features a 2" finished bore with a key way and two set screws. It is a durable, high quality, and precision sprocket with 30 teeth. Something that is notable about this 120BS30 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