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#1872 - 09/30/10 03:58 PM lift stand
gearhead426 Offline
New in town
Registered: 09/27/10
Posts: 6
I am wanting to create a stand that I can raise and lower. I have decided I want to use screw drive. dose any one know were to find a screw drive about 24'' long. I am looking for the ones you see in old scissor jacks. would all-tread and a nut work or would it wear out.
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#1879 - 09/30/10 07:05 PM Re: lift stand [Re: gearhead426]
cjmac Offline
MBN Enthusiast
Registered: 05/08/10
Posts: 560
Loc: Canada *****
A lot depends on how much you want to lift and how much you want to spend.
Look at this site. There are some formulas you can look at. I have dealt with the company and they have good service and products.

Roton


The screws in scissor jacks sometimes have right and left threads and nuts on the same shaft. This requires left and right nuts as well. A single pitch screw with twice the pitch will pretty much do the same thing. Anything will wear out if you overload it and/or don't grease it. Threaded rod properly sized would probably work fine. There would be some initial wear as the threaded rod often doesn't have the finish you get with a proper leadscrew and it is not ACME threads which are better suited to driving things. Would you use it 10 times a day or once a month? If you need 10 times a day for many years you would be better to spend more money up front for a better threaded rod. Often the nut is brass or bronze. This reduces wear on the threaded rod. The nut wears but is easier to replace.


Chris
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#1887 - 10/01/10 11:15 AM Re: lift stand [Re: cjmac]
kbs Offline
MBN member
Registered: 05/07/10
Posts: 109
A number of the treadmills have 110 VAC screw jacks in them to increase the angle of the belt.
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