Type of shielding gas used.

[geezer]

CO2 is not the preferable shielding gas for mig welding. It works, but its more for times when your in a jam. Hobart sells a small CO2 tank with their passport 180, but they emphasize CO2 in a jam.

Have to disagree with you on that,,,if you check out offshore manufacturers advertisements on mig welders they are refered to as CO2 welders,,,75/25 gas mixes are a western norm...not so in other parts of the world...CO2 is used extensivly there...It gives a hotter burn with more penetration,,,but it also has more splatter or BB's,,,75/25 and other mix's make it nicer...

Here is a website that explains it :http://www.alibaba.com/showroom/co2-mig-welder.html