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manual lifting project

  • Thread starter Thread starter infallibile_GF
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infallibile_GF

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Hello, everyone. I have to design a work desk for the company where I work. This counter is not intended for customers, but serves in the production department, such as indoor equipment.
This is a height-adjustable plate, on which to place the piece for processing. this plate must be adjusted in height, by means of a simple support screw and a hand-operated handle. the problem arises from the fact that the plate should not rotate, when the screw rotates, otherwise the piece that is rested on us would also rotate him and this is not good.
I would point out that there is already an old work bench like this, but 2 things do not convince me:
1_ the lifting screw is a special screw made specifically to lift loads with a trapezoidal thread, like a crick. instead I would like to replace it with a normal threaded bar m36x3, also for simplicity of processing and why more easily available.
2_ does not convince me at all the antirotation system of the plate, consisting of a tondino that prevents the rotation of the same, but it is a little elegant solution.

So I ask you two things:
1_ Can I use a normal m36x3 bar to lift the piece, which at most weighs 40kg, or would it be too hard to rotate the knob?
2_ Do you have any better, more elegant solution, to prevent the rooster from rising?
allego sketch
other information that I can tell you is that under the plate and under the piece there is a tray for the collection of liquids that can possibly come out of the piece, during the processing, because it is put in pressure with water.
 

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a good mechanical design book like niemann three volumes and some regulations. then look for the forum in the various sections and look for the formulas we posted.
a candle can be a good anti rotation.
start to set up reasonings and formulas that then we tell you ours.
 
to make anti rotation I would also use the round bar. If you have money you make that the column that goes up and down is a framework tube and make the sides inside another tube...thelescopic anti rotation.
There are a thousand ways. depends on how much €.
 
bhe thank you, but as I said being an internal equipment, it must cost as little as possible and must be as simple as possible to build. Returning and cnc processing are not a problem, being the daily bread of the company in which I work.
 

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