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What sets this 6319-ZZ bearing apart from others is the ABEC 3 precision standard that this bearing is made to
Sprocket Size: 60Q31
Dimension (Bi): 71
60SF60 sprockets are manufactured to accept a SF type QD bushing which
80BS42 Sprocket With 1-3/8" Finished Bore 120B35 Sprockets What sets this 6319-ZZ bearingThis 80BS42 sprocket features a 1 3 8" finished bore including a key way and two setscrews. It is a durable, high quality, and precision 42 tooth sprocket that fully meets all ANSI Standards which, insures proper contact between the #80 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
