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depending on where the high visibility blue tree marking paint is used
While the phosphate coated and then painted finish adds corrosion resistance to the 2BK70H pulley
2BK57 Pulley 1" Dimensions
Dimension (G): 21
120B21H sprockets with a stock bore comes with the standard 1-1/4" inside diameter hole with no keyway or set screws and can be easily machine bored to custom sizes
40BS51 Sprocket With 1" Finished Bore 120B13 Sprockets depending on where the highThis 40BS51 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 #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,
