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Hydraulic Press Idea using an Air Powered Jack

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I was at Harbor Freight where I found a 20 ton Air powered Jack on sale for $89. The Air Supply hose had a hand held lever that allowed the air to enter the jack. To lower the jack, there was the traditional Cross Pin to turn. 

Has anyone tried a building a press out of a Air Powered Jack? if so, could you discuss what you made and how well it works.

There's some threads about it in the press section. I think the consensus is that the stroke and return is too slow even with a spring assisting in either direction. I haven't read them in a while so I would look them up. I may not be remembering all the details correctly.

Pnut

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