Processes
MIG (GMAW), Pulsed MIG (GMAW-P), Flux-cored (FCAW)
Miller MIG Machine Support
Millermatic 355
Industrial MIG, pulsed MIG, and flux-cored machine offered with Bernard BTB or XR-Aluma-Pro gun configurations.
MIG (GMAW)Pulsed MIG (GMAW-P)Flux-cored (FCAW)
Industrial
Welding range
20 - 400 A, 12 - 34 V; XR-Aluma-Pro package listed at 20 - 350 A, 12 - 32 V
Input power
208/240/460/575 V configurations; catalog lists 1-phase and 3-phase configurations by package
Wire feed speed
50 - 800 ipm (1.3 - 20 m/min.)
Weight
99 lb. (45 kg), power source only
Class
Industrial
Machine Packages
| Stock number | Catalog package |
|---|---|
| 907808 | With BTB MIG gun |
| 951926 | With BTB MIG gun and EZ-Latch single cylinder running gear |
| 951927 | With XR-Aluma-Pro gun and EZ-Latch single cylinder running gear |
Compatible Accessories
EZ-Latch Single Cylinder Running Gear
301449 Most popular accessory listed for this machine.
Support page pendingEZ-Latch Dual Cylinder Running Gear
951769 Most popular accessory listed for this machine.
Support page pendingCompatible Guns / Torches
Bernard BTB MIG Guns
Catalog-listed BTB gun configuration with AccuLock S consumables.
Open support pageXR-Aluma-Pro Push-Pull Gun
Catalog-listed aluminum package gun configuration.
Support page pendingSpoolmate 200 Spool Gun
Catalog-listed popular accessory.
Open support pageSpoolmatic Spool Gun
Catalog-listed popular accessory.
Open support pageXR-Pistol-Pro Air-Cooled Push-Pull Gun
Catalog-listed popular accessory.
Support page pendingMiller Catalog Accessories
These accessories are placed here only when the Miller catalog names this machine, torch, feeder, or family path. Verify plug style, voltage, package, and serial-specific details before ordering.
| Part | Accessory | Catalog fitment | Source / path |
|---|---|---|---|
| 301481 | EZ-Latch Dual Cylinder Rack with Elevated Gun and Cable Rack | For Millermatic 255/355 and Multimatic 235/255; converts 301449. | Catalog p. 122 Open support path |
Full machine details
Welding Output
- 310 A at 29.5 VDC, 60% duty cycle
Wire Capacity
- Solid steel: .035 - .045 in. (0.9 - 1.2 mm)
- Stainless: .023 - .045 in. (0.6 - 1.2 mm)
- Aluminum: .035 - .047 in. (0.9 - 1.2 mm)
- Flux-cored: .035 - .045 in. (0.9 - 1.2 mm)
- Metal-core: .045 - .052 in. (1.2 - 1.3 mm)
- Silicon bronze: .030 - .035 in. (0.8 - 0.9 mm)
Material Capacity
- Mild steel: 22 ga. (0.8 mm) to 1/2 in. (13 mm)
- Aluminum: 18 ga. (1.2 mm) to 1/2 in. (13 mm)
Included With This Machine
- 15 ft. (4.6 m) 300-amp Bernard BTB MIG gun with AccuLock S consumables and .035/.045 in. reversible V-groove drive rolls, or 25 ft. (7.6 m) XR-Aluma-Pro air-cooled push-pull MIG gun with Miller FasTip consumables and .035/.047 in. reversible U-groove drive rolls for aluminum wire
- 10 ft. (3 m) work cable with clamp
- 9 ft. (2.7 m) industrial power cord
- Factory-installed gas solenoid
- Flow gauge regulator and gas hose for argon or Ar/CO2 mix, extra contact tips, and material thickness gauge
Dimensions
H: 19.25 in. (489 mm), W: 13.75 in. (349 mm), D: 26.25 in. (667 mm)
Source: Miller Electric 2026 Full-line Catalog, catalog page 8, literature DC/12.95. Product relationships on this page are kept separate from Amazon monetization data. Amazon buy buttons appear only after the product match, manufacturer, package quantity, and compatibility are verified.