Electric Hydraulic Pump

[BigChevy17]

I'm thinking about building a portable electric hydro pump that I can wheel around my shop for use on a tubing bender, hydro knockout punch, hydro shop press and anything else I can come up with that could use hydraulics.

I came across this thread but this is the only one I've found so far, I'll have to look tonight on a computer rather than my phone.

http://www.offroadfabnet.com/forums/showthread.php?t=1761

I'm new to the idea and don't have very much experience with hydro so I'm looking for some input.

I want to have quick disconnects and just switch the pump from machine to machine.
Any ideas?

 

[joe_padavano]

Any ideas?

I bought a commercial hydraulic power unit off ebay years ago. Motor, pump, oil reservoir, and solenoid valves. I think it was around $100. You'll spend that in parts. For QDs, just get tractor hydraulic QDs from Tractor Supply or equivalent.

 

[BigChevy17]

I bought a commercial hydraulic power unit off ebay years ago. Motor, pump, oil reservoir, and solenoid valves. I think it was around $100. You'll spend that in parts. For QDs, just get tractor hydraulic QDs from Tractor Supply or equivalent.

The hf one is $330 and I doubt that would be very good, I haven't looked anywhere else yet though.

 

[Rigpig]

I've got a JD squared model three manual bender and fabbed up an attachment for a cylinder, plumbed it in, built a stand for it etc... I'll post up some pics for you if you like. Not everything you're looking for but it might help you get started.
Cheers!

 

[crewchief888]

I'm thinking about building a portable electric hydro pump that I can wheel around my shop for use on a tubing bender, hydro knockout punch, hydro shop press and anything else I can come up with that could use hydraulics.

I came across this thread but this is the only one I've found so far, I'll have to look tonight on a computer rather than my phone.

http://www.offroadfabnet.com/forums/showthread.php?t=1761

I'm new to the idea and don't have very much experience with hydro so I'm looking for some input.

I want to have quick disconnects and just switch the pump from machine to machine.
Any ideas?

i like the idea of the one you linked to. it's simple, and fairly easy to build.

 

[Dale1962]

try this http://gizmoplans.com/hydraulic-power-unit never used this but looks like the units ive seen

 

[BigChevy17]

It seems pretty straight forward as long as there's no details I'm missing, I think it would be really handy to have a small portable unit that could power multiple things just by hooking up 2 lines.

I'm also torn between buying the HF 20t press, beefing it up and retro-fitting a hydraulic ram or building one from scratch. The little harbor freight one might not like full hydro

I've got a JD squared model three manual bender and fabbed up an attachment for a cylinder, plumbed it in, built a stand for it etc... I'll post up some pics for you if you like. Not everything you're looking for but it might help you get started.
Cheers!

Sure post up some pics!

try this http://gizmoplans.com/hydraulic-power-unit never used this but looks like the units ive seen

Sweet, I'm going to look at those a closer when I get on a computer

 

[astroracer]

I've got a JD squared model three manual bender and fabbed up an attachment for a cylinder, plumbed it in, built a stand for it etc... I'll post up some pics for you if you like. Not everything you're looking for but it might help you get started.
Cheers!

I did the same thing for my Pro-Tools bender. The plans for the stand are cheap enough and they include a few tune-up tips for your HF tubing roller also.
These plans use an air/hydraulic ram cylinder to actuate the bender. Works well. I will be adding an electric pipe threader to the tubing roller to replace the big wheel. The pipe threader will also get adapted to my bead roller PLUS it will still function as a threader...
The stand cost me about $14 dollars to build. I used 2 x 2 x 1/8 wall tubing I bought as reclaimed from old shipping racks.
I cut down a Harbor Freight furniture dolly to make the stand mobile.
All put together and ready for a test bend.

Ran a piece of thinwall 1" through the bender for a test. The jack cycles out in pulses. It doesn't shoot out real fast. it is slow and very controllable. I was concerned about how the jack would work but now have no issues with it.
About a 30 degree bend here.

Getting upwards of 90 degrees now. I had to reset the drive pin in the die at about 60 degrees. Not any real difference then if I was using the stationary tool post other then I am taking it easy doing it... This is going to be great. Being able to use the tubing bender at any time, without having bolt and unbolt the tool post, is going to make the bender a much more versitile tool!

Just an overall with a piece of tubing bent to 90 degree's without breaking a sweat!

I also tried out the Harbor Freight Tubing Roller on a piece of conduit. It rolled it like it wasn't even there. I got a little heavy handed with the "down" roller and kinked it but that was my fault in going to fast.
Since finishing the stand I have added a plastic tool box to store all of the roller dies in and have ordered the Swag Offraod upgrade kit for the HF roller.
I am in the process of building the adapters for the pipe threader.
Mark

 

[onewaydave]

Many dump beds on smaller (1 ton or so) pick ups use a 12v motor to drive a hydraulic unit. As opposed to the old PTO off the transmission/transfer case.

Dave.

 

[W_A_Watson_II]

astroracer,

I like that stand, where did you get the plans? I also use the HF Air over hydraulic jack on my Pro-Tools, and the stand you have is a better set up for using it, as the mount I went with causes some cylinder binding and difficulty getting the cylinder to return.

 

[joe_padavano]

The hf one is $330 and I doubt that would be very good, I haven't looked anywhere else yet though.

Again, the one I bought was used, industrial, and US made. Probably close to a thousand bucks new. That's the beauty of used stuff, especially at auctions.

 

[BigChevy17]

I looked around ebay but haven't found anything worth bidding on yet, I'm going to keep looking.
What kind of pressure/gpm should I keep in mind as a minimum?
I want to at least have 20 tons for my shop press.

 

[larry_g]

A couple of things to know when dealing with pressure and cylinders.

Force = pressure x area. (f=pa)

Area of a circle = pi x radius squared (a=pi x r2)

So if your worried about the HF press frame being powered then do the math.

So if you have a 4" cylinder and a 1000 psi pump then

a = 3.14 x 4
a ~ 12

f= 12 x 1000

F= 12,000 or 6 tons

Simple stuff if you figure it out.

lg
no neat sig line

 

[BigChevy17]

Again, the one I bought was used, industrial, and US made. Probably close to a thousand bucks new. That's the beauty of used stuff, especially at auctions.

Do you have any pics?

 

[BigChevy17]

A couple of things to know when dealing with pressure and cylinders.

Force = pressure x area. (f=pa)

Area of a circle = pi x radius squared (a=pi x r2)

So if your worried about the HF press frame being powered then do the math.

So if you have a 4" cylinder and a 1000 psi pump then

a = 3.14 x 4
a ~ 12

f= 12 x 1000

F= 12,000 or 6 tons

Simple stuff if you figure it out.

lg
no neat sig line

That's exactly what I was looking for, thank you!

 

[Sureshot]

A couple of things to know when dealing with pressure and cylinders.

Force = pressure x area. (f=pa)

Area of a circle = pi x radius squared (a=pi x r2)

So if your worried about the HF press frame being powered then do the math.

So if you have a 4" cylinder and a 1000 psi pump then

a = 3.14 x 4
a ~ 12

f= 12 x 1000

F= 12,000 or 6 tons

Simple stuff if you figure it out.

lg
no neat sig line

And just in case you didn't realize a pressure gauge can be used as a load cell by remarking it or having a chart handy.

 

[Danglerb]

All the cheap lifts have a roll around hydraulic pump. What I would think would be the issue is getting some kind of control on the pressure. In the end something manual might work almost as well and be a lot easier and cheaper.

 

[BigChevy17]

All the cheap lifts have a roll around hydraulic pump. What I would think would be the issue is getting some kind of control on the pressure. In the end something manual might work almost as well and be a lot easier and cheaper.

I'm planning on using a 4 way hydraulic valve to control it. Not sure if I should have one for each machine or just put one on the unit. Might get annoying having the lever separate from the press or bender.