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10B39 sprockets with a stock bore comes with the standard 20 millimeter inside diameter hole with no key-way or set screws and can be easily machine bored to custom sizes
100R54 Sprocket Dimensions
Sprocket Size: 120BS21
We also offer 100B39 sprockets with finished bore configurations right off the shelf from stock
Sprocket Type: 6
120SF13 Sprocket (QD Type) 100B35 Sprockets 10B39 sprockets with a stockThis 120SF13 sprocket is a durable, high quality, and precision sprocket with 13 hardened teeth that is manufactured to accept a SF bushing. Sprockets that have hardened teeth last longer, perform better, 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 #120 roller chain and sprocket. Meeting strict ANSI Standards
