Millermatic 185 (MIG Welder) for sale. The Millermatic 185 is a 230-volt, single-phase wire-feed welder originally designed for auto-body shops, light fabrication, and maintenance.Capabilities: Welds up to 1/4" steel in a single pass. It handles solid steel, stainless steel, and aluminum wire sizes from 0.023" to 0.035", as well as flux-cored wire.Amperage Range: 30A to 185A.