RPMpottery Posted September 10, 2015 Report Share Posted September 10, 2015 Any suggestions on how to make the opening SMALLER without having to buy new air mixer pins? The tips on these are not removable. The only thing I can think of is to weld the hole shut then re-drill. Any other options? They are old venturi burners. Thanks, Paul Link to comment Share on other sites More sharing options...
neilestrick Posted September 10, 2015 Report Share Posted September 10, 2015 Welding is your best bet IMO. I wouldn't trust JBWeld or anything like that around the heat. Link to comment Share on other sites More sharing options...
RPMpottery Posted September 10, 2015 Author Report Share Posted September 10, 2015 Welding is your best bet IMO. I wouldn't trust JBWeld or anything like that around the heat. Thanks. What would be the best way to weld it? Link to comment Share on other sites More sharing options...
JamieAlonzo Posted September 11, 2015 Report Share Posted September 11, 2015 Brass? You can try MAP gas flux and solder. You have a picture of the burner? Link to comment Share on other sites More sharing options...
Marcia Selsor Posted September 11, 2015 Report Share Posted September 11, 2015 I converted some by switching the orifices which screwed off. The burner company some them. I think weld is the only other way. marcia Link to comment Share on other sites More sharing options...
Mark C. Posted September 11, 2015 Report Share Posted September 11, 2015 Since you have not said what the material is I will assume its steel and a wield is your only option-that said the rod you fill the hole with is hard so you will need a cobalt drill bit to cut thru it easier. You could also drill and tap and put in brass orfices for easy change outs If it cast iron take it to a metal shop and have them fill and drill it. If its brass and I had it I would use my acetylene torch and silver solder then re-drill as that a good material for fill and heat and easy to drill as sated above a hand torch with MAPP bass (hooter than propane) and solder is a lesser but still workable solution/ Mark Link to comment Share on other sites More sharing options...
RPMpottery Posted September 15, 2015 Author Report Share Posted September 15, 2015 Sorry for the slow reply I've been away from home for a while. Thanks for the suggestions. The mixer's are brass. I'll try brazing with mapp or rent an oxy-acetylene welder. I won't be making the move for another month or so. I did find some inexpensive air mixers if it all goes wrong. Link to comment Share on other sites More sharing options...
JLowes Posted September 15, 2015 Report Share Posted September 15, 2015 In the book Alternative Kilns and Firing Methods, the author converted a Venturi burner to propane by soldering the 1/8" orifice closed and drilling a smaller orifice. It appears they raku fired all weekend thereafter with no issue looking at the photography. John Link to comment Share on other sites More sharing options...
Mark C. Posted September 16, 2015 Report Share Posted September 16, 2015 If you braze you only need acetylene no oxy needed. Mark Link to comment Share on other sites More sharing options...
neilestrick Posted September 16, 2015 Report Share Posted September 16, 2015 If it's brass it may be a stock part that you can find at Ace and drill out yourself. Link to comment Share on other sites More sharing options...
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