Was at my local scrap metal place yesterday and saw a Dayton 2.5 KVA 230V portable spot welder. Nice condition, only thing missing was a plug. I bought it for $20, put a plug on it and it appears to work fine. Now I'm looking for stuff to weld and info on the web. One thing I noticed was the Grainger replacement, manufactured by Miller, 4Z425 item number, says it's good for galvanized as well as mild steel. Does this mean you can weld through the galvanizing? I've never had much luck mig welding where there was any zinc contamination present, even the so called weld through primers seem to contaminate the weld. Is spot welding more forgiving?
18 years ago