40BS59 Sprocket With 7/8" Finished Bore 40B17 Sprockets the 16B-4 roller chain is

the 16B-4 roller chain is pre-loaded to a specific amount to reduce initial and long-term elongation

This 2AK23 Pulley 1" bore is directly interchangeable with other manufacturers

this 40A-2 roller chain is manufactured using heat-treated precision components

For more information on a 2AK32H Pulley

40BS59 Sprocket With 7/8" Finished Bore 40B17 Sprockets the 16B-4 roller chain isThis 40BS59 sprocket features a 7 8" 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 #40 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,