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
Millermatic 355

Processes

MIG (GMAW), Pulsed MIG (GMAW-P), Flux-cored (FCAW)

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 numberCatalog 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

Welding Output and Wire Capacity

Rated 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

Gun, Consumable, and Accessory Paths

Bernard BTB MIG Guns

Catalog-listed BTB gun configuration with AccuLock S consumables.

Open support page

XR-Aluma-Pro Push-Pull Gun

Catalog-listed aluminum package gun configuration.

Support page pending

XR-Pistol-Pro Air-Cooled Push-Pull Gun

Catalog-listed popular accessory.

Support page pending

EZ-Latch Single Cylinder Running Gear

301449 Most popular accessory listed for this machine.

Support page pending

EZ-Latch Dual Cylinder Running Gear

951769 Most popular accessory listed for this machine.

Support page pending

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.