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Thunder

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Everything posted by Thunder

  1. Great looking machines! I am impressed with all the improvements.
  2. very clean build, love the foot operated air.
  3. reinforcing couldn't hurt, I think on my first press I busted 1/2" bolts.... and as stated above don't squash steel unless its hot, hot steel squishes easy, cold steel stresses the frame. My original press is still being used. 1/4" is good on the square tubing, and do not know if bolts alone will do the job. Be careful its small but it is still 20 tons.
  4. laughing, thanks wish I got a commission.
  5. The 20 ton harbor freight air over hydraulic press will flatten 3/4 to 3/8 easy and fast in 2" segments
  6. As to the questions on the air compressor ... I use a very old 3 hp 120 psi max compressor. The pressure never seems to get up to 120, but stays around 100. It works fine, but a larger compressor would be much better. HF 20 ton recommends no more than 120 psi. Sorry for the long delay in answering questions, I need to check to see if I am getting email updates. Your ingenuity in the various press designs are amazing.
  7. Here are a couple of videos of the press in action, these are quite old and the die sets are primitive. But it will give you a general idea about what it can do.
  8. I am not sure if a Mig will hold it or not. I have always stick welded. You could tack it all up square and then have it stick welded, or mig it - and be very very careful until you are sure they will hold.
  9. look over these videos they may help answer your questions; youtube mini press Failures will depend on how good your welds are, your design, and materials. I do not recommend pressing on room temperature steel, only press on steel that is at forging temp Hot steel is softer than cold steel and mashes easier. 20 tons is 20 tons, it doesn’t matter if it’s a 6 foot tall press or a 2 foot tall press, However keep your die sizes small, as that 20 tons is spread over large dies Large dies will reduce its pressure by the surface area of the dies. Always inspect your press for defo
  10. Seth - here is a link to a PDF manual for the jack, look under purging air, page 7 - PDF Manual - this should have instructions. I have never purged my jack so I am not sure. Hope this helps.
  11. Seth - The pressing area of the dies determines the pressure exerted. My dies are 2” wide that gives a good amount of force, however if your dies are 4” across then you get about ½ the amount of pressure. The air motor has a discharge port where one would feel air escaping. Air shouldn’t be leaking from other areas. Remember this is a hobby press, it’s not going to have the force of one of the $4,000 monsters.
  12. Vihalvor It is a H.F. Air over Hydraulic jack. It is not a conversion; the silver module is the air motor that runs the jack. HF number - 95553. here is a link to see the jack: 20 Ton Air/Over Hydraulic Jack Looks like you have a good start on your press. Hope this helps answer the question. T. A. toler
  13. I haven't seen a mechanical version of the press. But if you can make it work we would love to see one. T. A. Toler
  14. Eastvillage - 1" bolt is good, couldn’t tell from the graphic, not sure what mine are, I broke the first set and went to a large set, mine are on the ram bar, my top member is welded. NESM - good idea, bottom member is just there to reduce the frame depth, bottom member is two 1" X 2" solid bars welded together, plenty strong. blacklionforge - go for it, I've thought about that experiment myself, if you can make it work that would be very cool indeed. Casey - The only way to know is to experiment. There are a lot of variables in these presses, maximum air pressure, frame flex
  15. Eastvillage, reefera4m Very nice jacks, very clean machines. One note: Watch the bolts and pins. If they start bending or deforming you may have to go with a thicker diameter, maybe not, just keep an eye on them, occasionally pull them out and inspect them for cracks etc. I had some bending on the first bolts I used and moved up to a larger diameter. Safety first, both of your machines look very well done. T. A. Toler
  16. In my original press, I made it entirely out of scrap square tubing lying around my shop. There are at least two different wall thickness, neither of which are 1/4. I would recommend that you use 1/4” , from a safety minded point of view. Much stronger frame. T. A. Toler
  17. 20 tons is the compromise between power and speed, the more tonnage the less speed. T. A. Toler
  18. reefera4m The original press was made from scrap that I had lying around my shop, that scrap happened to be 2” square tubing. You cannot tell from the graphics, but all of the tubing wasn’t even all the same wall thickness. The beauty of this press is what I presented and offered to the group was a concept; ever one that has made this press has added or subtracted their own ideas. Every press is just a little different, everyone trying their ideas and then presenting the ideas to the group and making the concept not mine but ours. Try your ideas and then let us all know what you found out
  19. Bronzetools: I have not had any problems with my jack, It may be the C frame puts a different stress on the jack?. T.A. Toler
  20. This jack looks very similar to the motors we are using here in the USA, if it is fast enough or not - all depends on your expectations. It is after all - a mini hydraulic jack - it has limitations as compared to the full sized presses and it has advantages.
  21. Clean looking rig, Good Job Art TA Toler
  22. There is a good discussion on water tempering on Fogg’s site with Randal Graham the link is here: Randal Graham Water Hardening It is worth reading T. A Toler
  23. Try one of these, I havent read them yet 20 ton air/Hyd. http://www.harborfreight.com/manuals/95000-95999/95553.pdf manual jack - all http://www.harborfreight.com/manuals/66000-66999/66450.pdf TA Toler
  24. I haven’t. I cant remember anyone posting how to achieve this conversion. But if you can figure out how to do it, I am sure we would all love to see it done. I will look when I get home tonight and see if I have any information on pressure etc, it may be on the instructions that came with the jack. TA TOLER
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