40BS19 High-Performance Sprocket 1-3/8" #160 R-Type Sprockets It utilizes set-screws for locking

It utilizes set-screws for locking onto a 1-3/4" shaft and features a premium C3 precision insert bearing housed within a high-strength solid-base cast-iron housing

2AK61 Pulley 1-1/8" Dimensions

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Shaft Diameter (d): 20

40BS19 High-Performance Sprocket 1-3/8" #160 R-Type Sprockets It utilizes set-screws for lockingThis 40BS19 sprocket featured a 1 3 8" 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