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10B30 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
Sprocket Size: 100C14
Additionally this bushing features a 13/16" bore with a standard keyway
Dimension (d1): 10mm
Sprocket Size: 100A19
120BS19H Sprocket With 1" Finished Bore 08B Chain Sprockets 10B30 sprockets with a stockThis 120BS19H sprocket features a 1" finished bore with a key way and two set screws. It is a durable, high quality, and precision sprocket with 19 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 120BS19H sprocket is that it fully meets all ANSI Standards, which insures proper contact between the #120 roller chain and sprocket thus preventing
