Binesman Posted July 19, 2020 Share Posted July 19, 2020 I know there is a formula for this. and if someone could please give me the formula I would greatly appreciate it. I am making a new forge it will use 1" NA burners. What size oriface do I need to drill for them to take 600 cubic inches to forge welding temp (under the assumption the forge is properly built and insulated). Thank You. Quote Link to comment Share on other sites More sharing options...
Frosty Posted July 19, 2020 Share Posted July 19, 2020 What type NA burner? Linear like a Reil or a jet ejector like a Porter or T? Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
Binesman Posted July 19, 2020 Author Share Posted July 19, 2020 It will be a T for but I didn't think that mattered for the formula does it? My apologies for not mentioning it in the start as I didn't think it made a dif. Quote Link to comment Share on other sites More sharing options...
Frosty Posted July 20, 2020 Share Posted July 20, 2020 I put a 0.045 mig contact tip in a 1" T burner but I don't know what size hole to drill. I haven't drilled a gas jet in I don't remember how long. I determined mig tip size through trial and error. Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
Binesman Posted July 20, 2020 Author Share Posted July 20, 2020 Ty frosty that puts it around a #56. Do you happen to know the mathematical formula? Quote Link to comment Share on other sites More sharing options...
Irondragon Forge ClayWorks Posted July 20, 2020 Share Posted July 20, 2020 I don't think there is a formula, at least I've never seen one. Like Frosty, I started with an orifice size of .0625 which was way too large. I then changed to an orifice size .025 which was too small. Then started drilling the orifice out one drill bit size at a time until settling on .036 which is perfect for our burner in our forge. Quote Link to comment Share on other sites More sharing options...
Frosty Posted July 20, 2020 Share Posted July 20, 2020 Mathematical formula? Do you really expect a mother to use math to mix formula with a hungry baby screaming?! Are you OUT - OF - YOUR - MIND - MAN? Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted July 20, 2020 Share Posted July 20, 2020 Mathematical Formula's gotta have Pi in it and everybody loves pi... (My Father once told me that every engineering formula must contain a $ in it.) Quote Link to comment Share on other sites More sharing options...
Mikey98118 Posted July 20, 2020 Share Posted July 20, 2020 People don't use a formula for this; they use a chart, since the formula is orifice diameter times gas pressure. It's all been worked out decades back. Look on line, by fuel. Quote Link to comment Share on other sites More sharing options...
North State Posted July 23, 2020 Share Posted July 23, 2020 I'm not sure it helps, but my 3/4 NA's use a .033 might tip... so Irondragon's .036 should get you headed in the right direction, Binesman. Quote Link to comment Share on other sites More sharing options...
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