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Tool Talk Discussion Forum

mig welder?

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joe

03-20-2004 08:31:04




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hi all...i'm totaly green when it comes to welding...i'm considering a new craftsman mig welder...i believe its an 80 amp..runs on 120 volts..its the smallest one they sell..its gasless...i'm not sure if thats good or bad...can someone take a minute to explain the diff between gas and gasless units...advantages of both...or any other suggestings one may have in terms of what welder a newbie would be best with...my primary need is for sheet metal (auto body work)...thanks, Joe

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TimV

03-20-2004 12:59:11




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 Re: mig welder? in reply to joe, 03-20-2004 08:31:04  
Joe: The primary difference between gas and gasless units is the type of wire used. Gasless units require the use of flux-cored wire. The flux provides the shielding for the arc and allows it to weld smoothly. The primary advantages of flux-cored wire are that it can be used without gas (duh, but important if you run out of gas!) and also that it allows welding in windy conditions where the shielding gas on a gas welder will be blown away. Welding with gas gives a smoother, cleaner weld (hardly any slag to chip afterward) and the wire is much less expensive. Both systems work, though most of the gasless systems are cheaper welders--you rarely see a higher-end system set up without gas, or at least the option of gas. I've got a Hobart Handler 135 with gas, and have been very satisfied with it. I don't have any experience with the Craftsman welders, though they're probably built by one of the major companys and re-branded. The "big three" of welding are Lincoln, Miller, and Hobart (which is owned by Miller) and you're probably better off to stick with a name brand welder.

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