Miller · 907734
Millermatic 255
Single-phase MIG welder with Auto-Line input from 208 V. Miller publishes 230 A at 25.5 V, 60% duty cycle.
240VInput class
2Processes
84Weight lb
20–350 A.Output
Specifications
Values are copied from the cited page. They are not estimated from another model or from a review.
| Spec | Published value | Source, checked 2 November 2026 |
|---|---|---|
| Process | MIG (GMAW), pulsed MIG (GMAW-P), and flux-cored (FCAW). | Quick specs, Processes |
| Output amp range | 20–350 A. | Quick specs, Amperage Range |
| Rated duty cycle | 230 A at 25.5 V, 60% duty cycle. | Quick specs, Rated Output |
| Input voltage and plug | 208–240 V, single-phase. Auto-Line 208–575 V, single-phase. The quick specs do not print input amperes. | Quick specs, Input Power |
| Wire or rod size | Not published by manufacturer | The quick specs do not print a wire-diameter range. |
| Weight | Machine only: 84 lb. (38 kg). Machine with running gear: 148 lb. (67 kg). | Quick specs, Net Weight |
| Material thickness | Not published by manufacturer | The quick specs do not print a material thickness. |
Notes from the source
- 120 V is below the published 208 V minimum.
Manufacturer page · Check this model against an outlet · 120 V list · 240 V list · Miller models
Questions the table can answer
What output does the Millermatic 255 publish?
20–350 A. Source: https://contenthub.itwwelding.com/api/public/content/miller-electric-mfg-llc/spec-sheet/PIM/94739d-dc12-8.pdf
What duty cycle does the Millermatic 255 publish?
230 A at 25.5 V, 60% duty cycle. Source: https://contenthub.itwwelding.com/api/public/content/miller-electric-mfg-llc/spec-sheet/PIM/94739d-dc12-8.pdf
What input does the Millermatic 255 publish?
208–240 V, single-phase. Auto-Line 208–575 V, single-phase. The quick specs do not print input amperes.
Which processes does the Millermatic 255 publish?
MIG, flux-cored.