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Post by broncocraigellis on Oct 28, 2007 22:13:00 GMT -5
I've searched on pirate4x4 and I found good information, but I would like to know if anyone here has a home made hydraulic conversion for their bender. I use a JD2 Model 3 bender, and I want to convert it to operate with a hydraulic cylinder. Does anyone have an old log splitter laying around? Not having to hard mount my bender to concrete got me thinking about this; however, knowing that I could eliminate having to pull the cheater bar to bend also contributed  |
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Post by possum398 on Oct 29, 2007 1:14:41 GMT -5
Yea, the splitter cylinder is way overkill. I have seen someone on pirate use a air cylinder. That way an air compressor could power it, instead of an expensive hydraulic system.
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Post by JWP on Oct 29, 2007 7:56:30 GMT -5
I had the air cylinder and hated it. It created a twist in the tube out of plane as I made a bend. It was also slow and very troublesome.
I fount that it really wasn't that hard to bend the tube if you used plenty of lube ( WD-40). I have only bent 2 inch .134 wall tubing and that is probably the most that a JD2 model 3 can handle. I expect that 1.75 or 1.5 inch tubing will be pretty easy.
Craig, when and where are you going to buy tubing from?
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Post by broncocraigellis on Oct 29, 2007 10:01:46 GMT -5
Probably not until sometime in the spring. I bought tubing from S & H steel in Tupelo the last time, but I would buy from another place. Where do you get yours from in the GTR area? Ellis steel?
I wanted to convert to hydraulic in case I was renting a place and would not have to either tear up the grass to pour a little slab or drll holes in their concrete.
I have heard the air cylinders are slow as well. Jason, was the cylinder binding and causing the twist?
I've read a couple of write ups (Scott from Rockstomper) that use 3x24 cylinders and hydraulic lift pumps with good results. He was breaking dies with his bending .500 wall tubing. I don't think I would bend anything that thick, but it could happen. The thickest I would probably bend would be .250 for a 4link truss and .188 for main rails.
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Post by JWP on Oct 29, 2007 11:28:19 GMT -5
I haven't bought any tubing around here. Ellis has a sattellite sight that you can buy from but I don't think they will be very competitive. I was thinking about O'neal steel in Jackson because they seem to have the best prices on DOM and HREW tubing.
I felt that the air cylinder put and uneven pressure on the arms of the benders. It probably had more to do with my design than it did the cylinder itself. With the problems of the speed of the cylinder and not bending straight, I just ditched it.
I understand where you are coming from on mounting the bender. I had mine anchored to the floor and it was always in the way. I just took it down about a month ago and have anchor bolts that I keep kicking when I walk around the shop, so yes it may be easier to build a package system that is easier to move around.
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Post by jharfst on Oct 30, 2007 6:22:46 GMT -5
Could you adapt something like this? www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=36468Seems you could just lay it on it's side and make a bracket to mount the top of the cylinder onto the bender and put a pin through the end of the ram into the bending arm. Maybe I'm missing something, but it looks like a plausable option. -jim |
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Post by broncocraigellis on Oct 30, 2007 9:01:18 GMT -5
Yeah, that would take more effort. The one Jason had and I am thinking of is just like that one except it is air over hydraulic for a jack. Lay on its side like you said and pin the other end. They are supposed to be ridiculously slow, which makes sense. Every air over hydraulic jack I've used is pretty slow going up.
Saw you driving on hwy 12 yesterday...the Jeep looks good going down the road.
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Post by broncocraigellis on Oct 30, 2007 9:05:06 GMT -5
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Post by jharfst on Oct 30, 2007 22:45:39 GMT -5
Ah. Now I know what ya'll are talking about. Yeah, saw one of the HF 20 ton air bottle jacks work and it reminded me of one of those cigarette lighter plug-in type air compressors, loud and takes forever to air anything up.
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Post by Chris@whiterhino on Nov 9, 2007 11:14:09 GMT -5
I just bought mine from JD2 and it works great. I got the air over Hydro and I don't have a problem with it.
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