![]() Harbor Freight's 20 ton air-over-hydraulic jack the model that is exactly the same size as the one that came The basic press comes with a regular 20 ton hand operated hydraulic "bottle" jack. Here's what I did to make the "Poor Man's Hydraulic Press": Note that on this style of "Bottle Jack" press, the jack stage is well guided. That's the standard 20 ton press that you buy for (using the end of the jack handle) to let the piston return. You have to twist this valve 1/4 turn ccw or so Jack that releases the oil to allow the jack piston to retract. There is a small valve in the base of the Since the piston is pushing against the top of the press frame, that effort simply pushes theīase of the jack, and therefore the spring loaded jack stage, downward. ![]() Piston, forces oil from the jack's reservior into the main (much larger) cylinder, pushing the main piston up a tinyīit with each stroke. When you buy one, you use muscle power to pump a handle on the jack which, The 20 ton hydraulic jack does all the work. Here's how the press works as you buy it: 20 Ton Air-over Hydraulic Press Poor Man's 20 Ton Air-Over Hydraulic Press Date Last Revised: September 27, 2022įrench Creek Valley Home Back to Blacksmithing
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