saintjohnbarleycorn Posted May 24, 2009 Share Posted May 24, 2009 Ok I put together a gas forge from an old one that was discarded, welded the holes and put in 1" of insawool. I bought a burner 3/4" burner. Its the hybridburner. The inside dimensions are approx. 7" x 12" x 9" my calculator come up with 720 cu ". It heats up a jack hammer bit to orange in lets say 10 minutes. It plenty hot for all the work that I have been using it for. no itc 100 only 1" of wool and not very tight around the seams. the box was set up for 3 burnersI plugged 2 with wool. I have not tried to get to welding temp, but I get most of the heat that I need in a timely manner at 5psi. So I am wondering about the size requirements, I had asked this before I actually put measured this one in another post. Part of my reason is the idea of having more than one forge just for forging and a smaller one for welding. I guess I will find out anyway when I build it, but just for speculation I am thinking that 1000 cu" if I use 2" of wool, and itc. and only one 3/"4 burner. Experimental I guess, I can always put another inch of wool lin there if it doesn't work. Sorry for all the theorizing on this subject, but just trying to get a better handle within my melon to make my "WAS" guess. Quote Link to comment Share on other sites More sharing options...
Frosty Posted May 25, 2009 Share Posted May 25, 2009 I don't know if it's a misconception but a lot of folk don't realize the burner to volume rule of thumb of 1 ea. 3/4" burner for 300cu/in is for welding heat, not general forging. There's nothing wrong with running a cooler forge for general work. Heck, it's only sensible to not run full out when you only need cruise. If you need welding heat in a large volume, single burner forge simply block off part of it. That's how my variable volume forge works, when I want positive welds I shrink the volume to way below the rule of thumb value. Works like a charm. I'd say you have the idea. Frosty Quote Link to comment Share on other sites More sharing options...
saintjohnbarleycorn Posted May 25, 2009 Author Share Posted May 25, 2009 thanks frosty, I should have some time here shortly ( famous last words) and get a couple put together. I will do some pics and some info when I do. Quote Link to comment Share on other sites More sharing options...
Frosty Posted May 25, 2009 Share Posted May 25, 2009 My pleasure. Looking forward to the pics. Frosty Quote Link to comment Share on other sites More sharing options...
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