Make A Worm Gear

Ray, It looks like a good use for your worm gear. A nicely done project overall.

I would caution you about putting some sort of safety lock or brake on your lift, if you haven't already done so, if you are going to be lifting heavy weights like that to prevent the possibility of serious damage or injury, Should one of the Nylon teeth fail, you could get a chain reaction of tooth failures.

Bob
 
Something to consider with the worm. The helix angle changes with the diameter. When you nash your worm gear account for the helix angle of the hobb.
 
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I agree with RJ, I would be cautious about lifting heavy weights with nylon gears, keep your feet clear at the very least, and fingers too
 
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