I just installed a Mig conversion gas kit on my Lincoln Weld pac 100,
nowhere does it specify in the manuals, the flow rate adjustment.Any
info would be much appreciated. Thanks in advance........ Kevin
20 CFH (Cubic Feet per Hour) is usually good unless there's a slight breeze.
Then you'll want to increase it to 25 or maybe even 30 but if the breeze is
that strong you won't have much luck anyway.
"I'm not grown up enough to be so old!"
I bought a MillerMatic 200 in 1982. It came with a cheesy CO2 regulator
which promptly froze up from hard us and I replaced it with a much better
I built ornamental metal with it for 12 years. I used CO2 totally, except
for one tank of 75/25 when I heard how much better it worked. Well, it did
work better, giving a smaller better looking bead, but not enough in my mind
to justify the extra cost. At that time in my area, it was about four times
as much as the CO2.
Fast forward 12 years. I bought a Lincoln 175SP+, and it came with a pretty
decent Argon/CO2 regulator. I use mixed totally now. I don't use a lot of
gas, and maybe if I were, I would go back to CO2. I know I can lay a stitch
weld of spots with Argon/CO2 on .056" tube, and it looks just like a TIG
weld. I use this at times where the weld will show, or I don't want to
grind it all off.
They both work, I think it just depends on what you are welding, and how you
want it to look when done. Do some side by side tests of both gases and
decide for yourself. A/C is prettier. I think it runs hotter because 100%
CO2 will cool the weld faster. I notice the finished beads with A/C are
thinner than and smoother than CO2.