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This 120B13 sprocket is a durable
40B33 sprockets with a stock bore comes with the standard 5/8" inside diameter hole with no keyway or setscrews and can be easily machine bored to custom sizes
Bore: 70mm
Our superior UCFC206 bearing with a 30mm bore is equipped with a premium C3 precision insert bearing housed within a high-strength solid-base cast-iron housing
meaning it is compatible with most gearbox brands
60BS21 21-Tooth Sprocket 1-15/16" Bore #60 Chain filter_60BS23-FB This 120B13 sprocket is aThis 60BS21 sprocket featured a 1 15 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 #60 roller chain and sprocket thus preventing premature
