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140C40 sprockets with a stock bore come with the standard 1-1/2" inside diameter hole with no keyway or setscrews and can be easily machine bored to custom sizes
Our superior HCST206-18 bearing with a 1-1/8" bore is equipped with a premium C3 precision insert bearing housed within a high-strength solid cast-iron housing
This 40BS57 sprocket features a 5/8" finished bore including a key-way and two setscrews
What separates this 2BK100H pulley from the others is that it is made using a high grade-35 cast iron
For additional information or to receive a quote on our UCX17-56 bearings
40BS55 Sprocket With 1-7/16" Finished Bore Blackstar Sprockets 140C40 sprockets with a stockThis 40BS55 sprocket features a 1 7 16" 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
