Help with gear ratio

  • Thread starter Janice12
  • Start date
  • #1
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I have a 8-1/2 inch drive pulley turning at 340 rpm. I want to have it drive a pulley and want that pulley, the driven pulley, to turn at 200 rpm. What is the formula to figure out what size pulley I need. Please help:smile: :smile:
 

Answers and Replies

  • #2
brewnog
Science Advisor
Gold Member
2,711
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The product of speed and diameter will be the same on both driven pulleys.
 

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