Millermatic® 355 - MIG/Pulsed MIG Welder 208/240/460/575V | MillerWelds

Millermatic® 355 - MIG/Pulsed MIG Welder 208/240/460/575V

MIG, Pulsed MIG and flux cored 208/240/460/575 V welder that welds from 22 gauge – ½ in. mild steel.

Machine Only

Machine with Running Gear Package

Machine with Aluma Pro Package

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What's Included

  • Power source with 9 ft. (2.7 m) industrial power cord
  • 15 ft. (4.5 m) 300-amp Bernard BTB MIG gun with Bernard AccuLock S consumables for .035/.045 in. (0.9/1.2 mm) wire
  • 10 ft. (3 m) work cable with clamp and 50 mm Dinse-style connector
  • Flow gauge regulator and gas hose for argon or AR/CO2 mix
  • .035/.045 in. (0.9/1.2 mm) reversible drive rolls
  • Extra .035 and .045 in. (0.9 and 1.2 mm) contact tips
  • Material Thickness Gauge
Easy-to-understand interface
7-inch color LCD display ensures proper machine setup and parameter selection, reducing setup time and increasing weld time
Pulsed MIG welding delivers higher quality
Lower heat input for less distortion on thin materials, less spatter minimizes post weld grinding and rework allowing more welding time. Perform welding applications that couldn’t be done in the past.
Auto-Set™ Elite
offers predefined weld settings to increase ease of use and ensure that the job is done right for operators of all skill levels.
Program mode allows easy save and recall of favorite weld settings.
Deliver more productivity, consistent quality by welders of all skill levels by using prequalified weld settings. Minimize supervisor need to intervene.
Trigger Program Select
Increases productivity by eliminating the need to go back to the machine to change weld settings. Simply tap gun trigger to select the program.
Capabilities include MIG, pulsed MIG and flux-cored welding.
Bernard BTB Gun 300 A MIG gun with AccuLock™ S consumables
AccuLock liner loads from the front and locks at the front and back to insure proper alignment for flawless wire feed path. New rubber overmold and ball -and-socket handle design improves grip and reduces welder fatigue. New Industrial Bernard AccuLock™ S contact tips provide superior Spray and Pulsed MIG arc performance.
Portability - Machine only weighs 99 lb
Weight is reduced by more than 40 percent compared to the Millermatic 350P.
Optional EZ-Latch™ running gear
Operators no longer need to use lift truck to load machine and running gear into the truck. Latches secure machine to running gear. Simply loosen the latch retaining knob and rotate latches to disengage machine from running gear for easy portability
Generator Compatible
The Millermatic 355 will be able to operate and provide full output when powered by generators with 19000 Watt (19K) output or higher. Limited output will occur when used with smaller generators.
Locks and Limits
Provides control of the weld parameter ranges minimizing deviations from the welding procedure specifications (WPS).   Learn More
USB Port
Provides the ability to easily update software, back-up settings and transfer saved weld programs from one unit to the next.
Input Voltage Selection Switch
Provides versatility to utilize any single- or three-phase North American power (208, 240, 460, 575 V). Location in the wire drive compartment provides the ability to manually switch input voltage. An error will display if wrong input selected.

Not Included

  • Shielding gas and safety equipment not included.
  • Welding wire
  • Push-Pull Gun (for welding aluminum)
  • Spool Gun (for welding aluminum)
  • Flux cored drive rolls (for welding with flux cored wire [FCAW])
  • Personal safety products (helmet, gloves)



Pulsed MIG (GMAW-P)

General Specifications

Title Millermatic® 355 - MIG/Pulsed MIG Welder 208/240/460/575V
Industries Interests Manufacturing
Construction and Fabrication
Amperage 20 A - 400 A
Material Thickness Aluminum 18 ga. (1.2 mm) - 1/2 in. (12.7 mm)
Mild Steel 22 ga. (0.6 mm) - 1/2 in. (12.7 mm)
Weldable Metals Aluminum
Specialty Metals
Stainless Steel
Input Voltage 208 V
220/230/240 V
460 V
575 V
Input Phase 1- and 3-Phase
Current Type DC
Rated Output 310 A at 29.5 V, 60% duty cycle
Max Open Circuit Voltage 90 VDC
Wire Feed Speed 1.3 m/min - 20 m/min
50 IPM - 800 IPM
Wire Diameter Aluminum 0.035 in. - 0.047 in.
Aluminum 0.9 mm. - 1.2 mm.
Metal-Core 1.2 mm. - 1.3 mm.
Metal-Core 0.045 in. - 0.052 in.
Stainless 0.023 in. - 0.045 in.
Stainless 0.6 mm. - 1.2 mm.
Solid Steel 0.9 mm. - 1.2 mm.
Solid Steel 0.035 in. - 0.045 in.
Flux Cored 0.035 in. - 0.045 in.
Flux Cored 0.9 mm. - 1.2 mm.
Silicon Bronze 0.030 in. - 0.035 in.
Silicon Bronze 0.8 mm - 0.9 mm.
Spool Size 12 in. (305 mm)
Portability Running Gear / Cart (Optional)
Weld Output CV
Applications Fabrication
Mobile Fabrication & MRO
Welding Education and Training
Net Width 13.75 in
Net Height 19.25 in
Net Length 26.25 in
Net Weight 99 lbs
Warranty 3 Years
Miller's True Blue Warranty





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