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QD (quick detachable) style sheaves offer a wider selection of bore sizes versus a standard "fixed" bore style sheave
thus preventing premature wear or breakage and this means that it will directly interchange with most other manufactures sprockets
140B17H sprockets with a stock bore comes with the standard 1-1/2" inside diameter hole with no keyway or set screws and can be easily machine bored to custom sizes
the 5211-2RS bearing features raceways that are precision honed to a superb finish
This 6015-ZZ ball bearing is a high-precision premium quality deep groove shielded 75x115x20 ball bearing made to ABEC 3 precision standards from AXIS
50BS16 Sprocket With 1-1/2" Finished Bore filter_35BS40-FB QD (quick detachable) style sheavesThis 50BS16 sprocket featured a 1 1 2" 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 #50 roller chain and sprocket thus preventing premature wear
