ANSI Roller Chain Sprockets Selection Guide: Types ...
2020-8-18u2002·u2002The left-hand digit is representative of the pitch, incremented in eighths of an inch. The right-hand digit of the number designates the type of chain to use with the sprocket, with 0 for standard chain, 1 for lightweight chain, and 5 for rollerless, bushed chain. Image Credit: Wikimedia
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