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  • Users: kiwibrick
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  1. kiwibrick

    Undersize timing pulley

    So I have a question. Two 3HTD pulleys, 40T and 20T, 20T pulley is 0.2mm too small in diameter, so it appears the 3HTD profile on the smaller pulley is not really 3HTD (its something like 2.968 pitch) In theory could this give a different ratio than the tooth count would indicate?, ie. say...

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