Electric Hydraulic Jack and Pump?

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Having some trouble finding anything online. I'm looking for a nice, electric-hydraulic system for a shop press. I can find "power sources" no problem, but I'm having some trouble finding a suitable jack. Do these go by a different name, or does anyone have a good source for these?John 3:16(2) Miller Pheonix 456(2) Millermertic 252Dynasty 210DXHobart 210MVPDoringer D350 SA Cold SawScotchman 350LT Cold SawWebb 10x50 MillWebb 15x40 LatheGeka Bendicrop Ironworker
Reply:Any hydraulic cylinder will do. You just have to cusomize 'the ends'.If you start with a hand pump jack, you may wind up fighting with the factory valves.Although, there is a thread around here where somebody did modify a jack to use another pressure source.Be wary of The Numbers: Figures don't lie,. but liars can figure.Welders:2008 Lincoln 140 GMAW&FCAW2012 HF 165 'toy' GTAW&SMAW1970's Cobbled together O/A
Reply:I modified an existing jack to work on a air/hydraulic pump.  I can't remember what I did inside the pump to modify it, but I remember I had to prevent the return fluid from going back to the jack resevoir and have it return to the reservoir on the air operated pump. They sell stand alone air operated hydraulic jacks, I don't kow if you can find one in the size you need or not.  Northern sells them, I'm sure others do as well.  It will probably be cheaper to get an air driven one than an electric one.  Otherwise you will have to buy a pump, motor, and valves plus cylinder.  Pretty much a log splitter. Many jacks already have a plugged off opening so you can go directly in with a hydraulic hose.Last edited by blackbart; 01-30-2015 at 02:15 PM.
Reply:Here is a picture of what I did to a HF pipe bender.  Just one hose with a spring return on the cylinder. Attached Images
Reply:Those pumps put out up to 10,000psi.You need to make sure all your parts are rated to that pressure, if not your working with a time bomb!
Reply:To echo what gimpyrobb said, there is a difference between a hydraulic pump and motor assembly and a porta-power pump system. One is 10,000psi the other is rated roughly from 2500psi to 3500psi. The hoses and pump components for the porta-power systems are all rated for 10,000psi including the cylinders, if you mix a cylinder rated at 2500 to 3500 psi into a system like that you could end up with some serious problems. The only saving grace if this happens, are the characteristics of fluid versus gas if there is a rupture. Fluids don't explode per-say, but when fluid over-pressuring occurs the resulting failures can cause sprays that can cause physical damages to your body and other things. Standard hydraulics(lower pressure) are generally less expensive, Porta-power systems(higher pressure) can get expensive quick, that is unless you are using HF type stuff. If you go with Enerpac, OTC, SPX, or a brand such as that you will pay a premium. Consider this too though, the higher pressure systems are smaller in physical size and weight generally and provide much more tonnage for this smaller size than the lower pressure type systems. Much more can be said, but I believe that you get the idea. Good luck and best regards, Allanaevald
Reply:Buy a porta power use the ram that comes with it in place of the cylinder, now the pump and cylinder match. If done. Properly you could put a wood block in the press and remove the ram for use as a porta power if needed .
Reply:Originally Posted by Weld oneBuy a porta power use the ram that comes with it in place of the cylinder, now the pump and cylinder match. If done. Properly you could put a wood block in the press and remove the ram for use as a porta power if needed .
Reply:@ Econdron - you want electric/hydraulic and not air/hydraulic?  The former is $$$$ and high-pressure as others have stated.  You never stated the rated capacity you are looking to achieve.Here's the A/H source we're going with for a 20T OTC press,http://www.otctools.com/products/20-...ic-bottle-jack"Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:Grainger has them all day, but if you are building one, almost any single acting cylinder. Pick one up surplus, there are many sites and local sources. You can have the hoses made up with a pressure gauge, and with a little math, translate the PSI to lbs/tons.Constant Current Weldor.
Reply:Originally Posted by ManoKai@ Econdron - you want electric/hydraulic and not air/hydraulic?  The former is $$$$ and high-pressure as others have stated.  You never stated the rated capacity you are looking to achieve.Here's the A/H source we're going with for a 20T OTC press,http://www.otctools.com/products/20-...ic-bottle-jack
Reply:Would a 980 lift cylinder be too big?Powcon 300st (my favorite)Miller Goldstar 600ssLincoln Idealarc 400/400Miller 12vs2 LN25'sMiller Deltaweld 302Miller Bobcat 250 G EFIMiller Bobcat 225d Plus (Dropped a valve, up soon)Everlast 255ext (ordering soon!)
Reply:here is a shop press I built using a 1hp pump, a 4" double acting cylinder and a valve. The pump is set to 3200 psi which yields 20 ton with a 4" cylinder. The valve has a switch that activates the motor relayLast edited by sparkness; 02-01-2015 at 03:58 PM.mig,tig,oxy,plasma,lathe,mill,bender,vise,grinder
Reply:I like that would like to switch over to cylinder and get rid of the hydraulic jack.