My little Lincoln 140c (120VAC) came with "smooth" rollers for .025/.030" AND .030" sized MIG process wire. Not to mentin a knurled .030"-.045" knurled "flux core" wire roller. That being said, I see many people here routinely talk about using either the .023/.025" wire diameter for a 120VAC welder or step up to the flux core .035" dimeter wire. I haven't seen anyone discussing pros or cons about the .030" wire on a 120V home garage type machine.
My questions are:
1) Does anyone regulary use the .030" wire size for a little 120VAC mig welder with 75/25 gas mixture? Am I missing something? So far, I've only used the .02" stuff and would like to try a slightly larger diameter wire size. I'd like to try welding some angle iron that just ever so slightly thinner than 1/4". I'd prefer to avoid the flux core stuff and I want the best penetration possible that I can get with using shielding gas on my little machine.
2) Am I good to use the .030 for the steel slightly thinner than 1/4" or should I stick with the the .025" wire for all mig welding while utilizing a 120VAC mig welder?
For what it's worth, I only use Lincoln "SuperArc L-56" wire for all my mig welding stuff. Yeah I know I should get a "bigger" mig welder if I want to ROUTINELY weld thicker material. As for now, that isn't going to happen. I have to stick to the 120VAC welder that I have.
Thanks in advance for this beginner "lawn art" welder.