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    Pulley size needed is easy to figure. Divide...

    Pulley size needed is easy to figure.

    Divide the speed you want by the speed of your motor.

    You want 1000 rpm and your motor is 1750.

    1000/1750= 0.57

    If you have a 6 inch diameter drive...
  2. Replies
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    5,125

    This seems to be a good rule of thumb and easy to...

    This seems to be a good rule of thumb and easy to figure but my numbers are larger.

    Circumference X RPM = surface speed [Changing from inches to feet divide by 12.]

    3.14 X diameter =...
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