40BS25 High-Performance Sprocket 1-1/4" filter_35B42-SB you identify the chain pitch

you identify the chain pitch to confirm that you are using this on a #40 roller chain

and precision sprocket with 12 hardened teeth that is manufactured to accept a 3020 bushing

Part #: SA 206-18

Sprocket Size: 35BS16

64" at its widest point (the connecting link)

40BS25 High-Performance Sprocket 1-1/4" filter_35B42-SB you identify the chain pitchThis 40BS25 sprocket featured a 1 1 4" 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