When my work had the old Miller Deltawelds for mig welding we had the high speed motors that went up to 1400ipm. We had Series 60 & 70 wire feeders with dual schedule whips and my low speed was at 800 and my high was 1050 and on other machines at 1200 with .035 wire. This is on 7-10 gauge mild and stainless steel. 4 foot seams would take under a minute to put a 3/16" weld on it. I do miss the old piecework days.
