Worm Gear Ratio

H.K.Barrows

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Question, I have a worm with a single lead 5 pitch or 5 threads/ in., this meshes with a 36 tooth wheel. the question is what is the ratio, how to get to the answer. Thank you Regards Red
 
The gear ratio is 36 to 1. Turn the worm 36 revolutions and the worm wheel will turn 1.

Ray
 
The worm only has one tooth. So the wheel gear sets the ratio.

Leon
 
Actually a worm gear may have more than one start like a screw thread or ball screw, multiple start worms are necessary to achieve certain ratios.
 
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