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Pitch Diameter: 73
Something else that is notable about this 100B29 sprocket is that it fully meets all ANSI Standards
Sprocket Size: 120A80
120B21 Sprocket With Stock Bore 40-Tooth Sprocket Click Here To See OurThis 120B21 sprocket is a durable, high quality, and precision sprocket with 21 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 120B21 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 fully black oxide coated
