Dear Don: You mention a Turbo torch that uses ambient air. Could you
describe this a little more? Is it different from a hardware-store
type propane torch, that also uses ambient air? I use the latter,
for some things, and it=92s very limited in tip sizes. Heat is
adequate (I=92m not casting), but I essentially have to have different
tips on separate torches.
I like the idea of not needing oxygen.
Lin, I call it a turbo-torch because thats what some welding supply
houses call them. Not sure but I think one or another is even named
’turbo-torch’. Essentially it is a single gas torch that has holes of
specific size and number drilled into the base of the tip where it
connects to the handle. As the gas passes through the line filter,
and past the holes, it sucks in the air in exactly the right amount
mixes with it and gives a perfectly adjusted flame. Basically, there
is no adjustment to be made, except perhaps back at the regulator by
which the amount of overall fuel available to the tip can be
controlled. When you open the control valve, the full value of fuel
and air exits the tip and when ignited it gives the most efficient
flame. Different tips can be used from small to very large. These
torches cannot be used for very fine work like retipping (though some
have been successful at it) or small chains, but they are fine for
repronging to larger items. The very large orifices can be used for
large items and do very credible job casting.
Smith is one of the most popular brands…they make all sorts of
welding, brazing and soldering torches. I have an old Universal but
there are a number of others out there. You can get them
specifically for acetylene, propane, or, natural gas.
Cheers from Don at The Charles Belle Studio in SOFL where simple
elegance IS fine jewelry! @coralnut1