50BS34 Sprocket With 1" Finished Bore 1VP30 Pulley This 40BS18 sprocket featured a

This 40BS18 sprocket featured a 1-1/4" finished bore with a key-way and two set screws

35BS70 Sprocket Dimensions:

40BS37 1-1/8" Finished Bore Sprocket Dimensions:

40B11 sprockets with a stock bore comes with the standard 1/2" ID hole with no keyway or set screws and can be easily machine bored to custom sizes

50BS34 Sprocket With 1" Finished Bore 1VP30 Pulley This 40BS18 sprocket featured aThis 50BS34 sprocket features a 1" finished bore including a key way and two setscrews. It is a durable, high quality, and precision sprocket that fully meets all ANSI Standards which insures proper contact between the #50 roller chain and sprocket thus preventing premature wear or breakage. This sprocket is also black oxide coated which increases resistance to the environment and will prevent early rust build up. We also offer stock bore sprockets,