40BS14 High-Performance Sprocket 1-1/8" 2AK124 Pulley What sets this 5210-ZZ bearing

What sets this 5210-ZZ bearing apart from others is the ABEC 3 precision standard that this bearing is made to

Roller Diameter (D): 35

35BS30 1-1/8" Finished Bore Sprocket Dimensions:

Part Number: #200B18

40BS14 High-Performance Sprocket 1-1/8" 2AK124 Pulley What sets this 5210-ZZ bearingThis 40BS14 sprocket featured a 1 1 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