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25th July 2011, 05:42 PM #1New Member
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Can you use flux core wire in an old gas mig welder?
G'day All,
My question is pretty self explanatory given the title of the thread. I was wondering if anyone has tried using flux core wire in an old gas mig welder without gas. If so, did it work?
I can't see why it wouldn't work.
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25th July 2011 05:42 PM # ADSGoogle Adsense Advertisement
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25th July 2011, 06:09 PM #2Tool addict
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As long as you can reverse the polarity, don't see why it wouldn't work either.
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25th July 2011, 07:42 PM #3
Yes. You need to change the +ve lead that connects to the handpiece conduit mounting block over to the work lead and vice versa.
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25th July 2011, 07:59 PM #4New Member
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Can I ask a stupid question?
Why do you need to reverse the polarity? An arc is an arc; isn't it? Does it really matter which way the current is flowing?
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25th July 2011, 08:16 PM #5SENIOR MEMBER
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Polarity changes the direction of electron flow in the arc (from -ve to +ve) and thus where the heat is. For gas you run handpiece positive which puts the heat in the wire, for gasless it's handpiece negative which puts the heat in the work.
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