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100B16H sprockets with a stock bore comes with the standard 1-5/16" inside diameter hole with no keyway or set screws and can be easily machine bored to custom sizes
Set Screw Size (D): 5/16"
Sprocket Size: 100A24
100BS11 2" Finished Bore Sprocket Dimensions
100BTB21 Sprocket (Taper Bushed) Roller Chain Wear Gauge 100B16H sprockets with a stockThis 100BTB21 sprocket is a durable, high quality, and precision sprocket with 21 hardened teeth that is manufactured to accept a 2517 bushing. Sprockets that have hardened teeth last longer 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 #100 roller chain and sprocket which prevents premature wear or breakage. This
