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This 100BS21 sprocket features a 2-3/16" finished bore with a key-way and two set screws
and the black oxide coating provides corrosion resistance
This 100B18 sprocket is a durable
and precision sprocket with 13 teeth
Aluminum - 0
140A31 Sprocket 1" Stock Bore This 100BS21 sprocket features aThis 140A31 sprocket is a durable, high quality, and precision A Plate sprocket with 31 teeth that is manufactured out of high quality steel. Something else that is notable about this sprocket is that it fully meets all ANSI Standards, which insures proper contact between the #140 roller chain and sprocket thus preventing premature wear or breakage. This sprocket is also evenly coated with black oxide, which adds resistance to to the environment and
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