Gasless MIG Weldng

Yes. Takes more skill and the wire is thicker. I just end up grinding off the blobs. Why not go have ago and see how it goes

 

Ideally the polarity should be reversed, I understand.

Having said that, my neighb - who is a 'coded' welder (whatever that is) - has used gasless wire in his 'normal' gas MIG welder with decent results.

 

Yes. Reverse polarity. It's just a case of switching wires around and takes seconds to do. Should say somewhere in wire compartment. Flux wire is thicker and more power is needed so a little harder to get clean weld. I just do in spots and grind off after. Trouble is gas don't last long with those small bottles. 10 mins or so. Best investment in big bottle if you can.

 

Reverse polarity gun negative and 'earth' positive
Expensive the small gas bottles, I use to medium & a slightly larger one, weren't that expensive to buy, use to use CO2 shielding gas (Argon CO2 mix ofered 75/25 or 90/10 mix) or sometimes just CO2 as it was cheaper.

http://www.boconline.co.uk/en/produ...nert-gases/carbon-dioxide/carbon-dioxide.html

 

I have a large co2 cylinder that I picked up from 'somewhere' and get it refilled at a place that does fire extinguishers. Costs about a tenner for a 14lb refill which will keep you welding all year. Will need a regulator too.

 

Have read of this guide, NOTE the cylinder test rings for CO2 bottles, most important.



https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&ved=0ahUKEwjs_-TD2afVAhWFCsAKHTgpCfoQFghCMAQ&url=http://www.bcga.co.uk/pages/download_document.cfm?document_name=L10.pdf&usg=AFQjCNGvh6NlA12iu_QzMd62Kw5BgUUHPQ

 

I use Co2 intended for drinks machines, no deposit on the bottle but each costs around £30, return the empty and get a refill. Bratby Gasses in Shrewsbury are my suppliers, you do need a regulator.