Not tractor related, but still hydraulic

[J_J]

The air motor on my hyd jack works from start to finish, and has springs to pull the shaft back down.

The one I have is a 20 ton and cost me about $80 several years ago. It is kind of slow.

 

[handirifle]

JJ
The working pressure is about 2,000 so not super high, at least that one. Thanks for the info on the air over jacks, they are a low cost option.

Speed isn't super important, since the travel distance is short, and I have no plans for high production volume. I suppose I COULD start with an air over jack, and make it work, just to see if the whole thing will work out likre I imagine, then if it does invest into the elec option.

How thick of an H frame would I have to build to hold up to this thing? I believe the dies I will be using would give way before the thing reached 20 tons, most likely way before.

 

[J_J]

The manual hyd jacks can pump up close to 10,000 psi.

Here are some different crimpers.

http://rceco.com/MN.asp?pg=HSpress

http://www.corbins.com/pr-csp1h.htm