how to build a small mobile mechanical hydraulic crane for a workshop

[pietromarruggio]

Hi, I would like to build a small hydraulic mobile workshop crane, sturdy lightweight, manageable agile in the maneuvers to be made of steel profiles, if possible instead of the hydraulic piston would I put a mechanical device to raise and lower the arm some ideas?



https://www.liftingsafety.co.uk/prod...crane-293.html

https://www.liftingsafety.co.uk/prod...rane-2937.html



https://www.liftingsafety.co.uk/prod...anes-3011.html

[MMW]

My first thought was adapting a hi lift jack to raise and lower the boom.

https://www.northerntool.com/shop/to...579418e3fa5da4

Then I thought why not just use a hydraulic jack like every engine hoist has?

https://www.northerntool.com/shop/to...1c1e273a1aa382

Why do you not want hydraulics?

Maybe adapt something like this?

https://www.larsonelectronics.com/p-68985-.aspx

After re-reading your post I think you should just copy your second pic which is a hand crank. Why reinvent the wheel?

[ryanjones2150]

Or get a forklift.

[pietromarruggio]

thanks forthe precious suggestions I will treasure your words

[Noel]

https://forum.millerwelds.com/forum/...ta-restoration

My first thought is get out a pencil and paper. Second is do some thinking. Third Engineering. Forth design to paper. Followed by material choice, purchase and fabrication. Give extra thought to engineering. Post pictures.

[Aeronca41]

You could probably use some sort of ball bearing (sometimes called Saginaw) screw in place of the hydraulic jack, but it would cost a LOT more.