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This 120BS28 sprocket features a 2" finished bore with a key-way and two set screws
10B21 sprockets with a stock bore comes with the standard 16 millimeter inside diameter hole with no key-way or set screws and can be easily machine bored to custom sizes
100X12 weldon hubs are primarily used in agricultural applications
Our superior 10B A2 attachment connecting link is designed explicitly for metric 15
120BS21 Sprocket With 1" Finished Bore 100B9 Sprockets This 120BS28 sprocket features aThis 120BS21 sprocket features a 1" finished bore with a key way and two set screws. It is a durable, high quality, and precision sprocket with 21 teeth. Something that is notable about this 120BS21 sprocket is that it fully meets all ANSI Standards, which insures proper contact between the #120 roller chain and sprocket thus preventing premature wear or breakage. This sprocket is also black oxide coated which increases resistance to the environment
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