40BS21 High-Performance Sprocket 1-3/16" filter_35B14-SB This 140B15 sprocket is a

This 140B15 sprocket is a durable

With B-series TB pulleys you can use A

This 40BS16 sprocket featured a 1" finished bore with a key-way and two set screws

4375" ball bearing made to ABEC 3 precision standards from AXIS

Part #: HCFS 214-43

40BS21 High-Performance Sprocket 1-3/16" filter_35B14-SB This 140B15 sprocket is aThis 40BS21 sprocket featured a 1 3 16" finished bore with a key way and two set screws. It is a durable, high quality, and precision sprocket with 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 #40 roller chain and sprocket thus preventing premature wear