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View Full Interactive Version Of This Page : National Torch propane,oxy mix how much?


char
2009-03-06, 8:43pm
Ok here I am bought another national with the large sm-21 tip need to know what my ratio on gas and oxygen is for this.Any help would be greatlllllllllllly appreciated:biggrin:

Dale M.
2009-03-11, 8:48am
Pretty much like any other surface mix, 2 to 1 for soft glass, 3 to 1 for boro..

Dale

evolvingBeau
2009-03-11, 9:16am
I used to use about 5psi propane and 10-20psi oxy with that torch. Like Dale said..

rg9403
2009-03-12, 12:11am
i used 3-5 psi for propane and 15-20 for oxy.


most of the time it was 5 and 20

glasshouse
2009-03-12, 12:41am
I use the 8M-SM21 currently. Love it! My propane is at 5 and my oxygen is set between 12-15. For soft glass (104.) It reduces like a dream.

:) Kelly

char
2009-03-14, 10:11am
Thanks for the help !