40BS23 High-Performance Sprocket 1-7/16" UCFCSX00 4-Bolt Set Screw Flange Bearing This R20-2RS ball bearing is

This R20-2RS ball bearing is a high-precision premium quality sealed deep groove 1-1/4"x2-1/4"x0

This 120B26 sprocket is a durable

Dimension (F): 2-1/2"

SBRFB207-22 bearing is a 1-3/8" bore three-bolt light-duty flange bearing that utilizes set screws to secure to a 1-3/8" shaft

This 40BS12 sprocket featured a 7/8" finished bore with a key-way and two set screws

40BS23 High-Performance Sprocket 1-7/16" UCFCSX00 4-Bolt Set Screw Flange Bearing This R20-2RS ball bearing isThis 40BS23 sprocket featured a 1 7 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