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UC209-27 bearing is a normal-duty ball bearing insert made to C3 precision standards and utilizes set screws for securing a 1-11/16" shaft
08B21H sprockets with a stock bore comes with the standard 12 millimeter inside diameter hole with no key-way or set screws and can be easily machine bored to custom sizes
This 120B28 sprocket is a durable
Sprocket Size: 120A14
Sprocket Weight: 282
40BTB15 Sprocket (Taper Bushed) 51-Tooth Sprocket UC209-27 bearing is a normal-dutyThis 40BTB15 sprocket is a durable, high quality, and precision sprocket with hardened teeth that is manufactured to accept a 1008 bushing. 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 which prevents premature wear or breakage. This
