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How to calculate the torque for a motor for a 24" scissor lift?
What kind of reduction gear motor would I need to do this. I would prefer 120vac operation so I don't have to fiddle with batteries or inverters. This is going to be used in a workshop to raise and lower the height of the top of my workbench. I have seen this done with a battery powered drill btw, but I want to have it self contained.
A typical 24" automobile scissor lift has no motor. I want to add one. It will need to lift around 500 pounds about 14 inches in about 30 seconds to 1 minute, from an initial height of 10 inches to the fully extended height of 24". I plan on mounting the motor on the nut end of the threaded rod (acme 1/2" - 10tpi). A jack that size can handle up to 2.5 tons, so that is not a problem at all. But I don't want to have it under powered either.
How would you calculate that?
@Jon S- "Wouldn't a hydraulic solution be a lot easier? As in motorcycle lifts?"
I considered it, but too shakey and expensive. A woodworking workbench needs to be rock solid. The jack is just to get it to the right height. I have other methods of locking it there.
Thanks though!
I went to eng-tips.com and they had a whole thread about this exact subject. A WAG says about 40 foot pounds, as these jacks are made for little old ladies to change a tire. Works for me. And I will likely be able to get by with a cheap dedicated electric drill from HF.
3 Answers
- Jon SLv 61 decade agoFavorite Answer
Wouldn't a hydraulic solution be a lot easier? As in motorcycle lifts eg http://en.wikipedia.org/wiki/Motorcycle_lift
