Air over Hydraulic upgrade to Press

[8ob]

Looks like the same pump I got to power my hole punch and bead breaker, just had to change the fitting to make it fit both. Not enough capacity in the reservoir on these for a big ram like the staffa tube benders, I think they only hold about 1.5 ltrs.

Bob

 

[dieselsamurai]

Looks like the same pump I got to power my hole punch and bead breaker, just had to change the fitting to make it fit both. Not enough capacity in the reservoir on these for a big ram like the staffa tube benders, I think they only hold about 1.5 ltrs.

Bob

View attachment 386606

Looks like the way to go ! Sealey Enerpac etc all over £500 but for £100ish it seems like a bargain its just you see this stuff so cheap and wonder if its going to be any good

 

[dieselsamurai]

Heres the press after mods



I made a better 'table' as the original was just 2 bits of channel and warped



plus a £15 ebay winch as a lift as its bloody heavy



And made a nose for the ram with a 1" bore so my flypress tooling fits plus retraction springs ( knew worth keeping from an old trampoline! )

 

[armalites]

I've got one of the pumps on my bead breaker and for the money it works really well. My bead breaker is the same as @8ob unit.

I've only ever removed 5-6 rear tractor tyres with the bead breaker and I would say the misery it saved was worth every penny. We had one on a rusty Fordson Major rim that my impatient eldest child had already tried driving over the tyre with another tractor and pushing it with the mini digger with no luck. We had bead broken on both sides and tyre off in a few minutes with the bead breaker.

The bead breakers must be the standard these days as new tyres have a special cut out in them for the first push.

I would imagine it would be pretty easy to make a bigger tank for one of these pumps and extend the pick up

 

[Erie Fred]

A little more on the ShoeBox pumps.
I've used them in a few places at the "day Job".
1. First job a request came in for a ergonomic lift table for an area with flammable chemicals, everything has to be "EE" rated. The job was to make a adjustable height work station.
Design was sent out to vendors, they suggested an electric cylinder, no go, and EE rated was too expensive (made qty (6) of these workstations).
I found out that when you buy the OTC brand ones, you can order (or change out yourself) the cartridge pressure relief valve, all the way down to 2,000 psi. I didn't need the 10,000 psi, and no way could I find a 500 lb capacity cylinder with 18" stroke to match the pump.
So I designed a simple 4" box tube post, outer piece slid up/down over it, set a basic 2,000 psi "ag" cylinder inside the box tube.

So this little $400 pump/tank/valve filled the bill nicely, and the height only changes each shift (once every 8 hours).

2. Later on a similar job came to my desk, but longer stroke, and moving every few minutes as each part is worked on. And the operator wanted faster speed as well.

I found Enerpac made a brand new style pump (similar to the shoebox ones), much more volume/speed, but the tank was small, and the pressure had to be "dialed down", I could not make the design "foolproof".

XA-Series Air over Hydraulic Foot Pumps | Enerpac

Enerpac XA Series Air Driven Hydraulic Foot Pumps are ideal choice for hands-free operation. Two control pedals for adding and releasing pressure and fine metering controls to apply the mandatory stroke and force.

www.enerpac.com

The OTC shoebox pumps can be ordered with larger tanks under them, however they don't have the speed needed.
https://shop.spxflow.com/spx/en/USD/Industrial/Industrial-HT/Power-Team/Pumps/PA6-Series/c/Power Team-PA6 Series?displayProduct=true and you all could simply fab a larger steel box (if'n you had a MIG welder somewhere....) but the Enerpac one was not modify-able.

This cylinder (another 2000 psi unit) was a 3' stroke 1.50" dia. bore, and we needed to lift under 1000 lbs, so we had pressure to spare.
And this "Lift Post" was power UP, and gravity "DOWN".

Playing a few cards I had, I simply applied the pump output to the bottom of the cylinder, and a TEE fitting ran the same oil to the TOP fitting......and I got my speed, my lower oil volume requirement, and the system works as it should for the operators...step on the "UP" and it goes UP...step on the "DOWN" and it goes DOWN.