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Miller Millermatic 255 MIG/Pulsed MIG Welder – 208/240V - 907734


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The Millermatic 255 mig welder is an easy to use machine to increase efficiency and productivity for the light manufacturing and fabrication users. Color screen featuring Auto-Set™ Elite and Pulsed MIG. This all-in-one welder connects to 208 or 240 volt input power. Welds up to 1/2” aluminum, stainless and mild steel.


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Gtin 715959668873 SKU: 907734 Categories: , ,


Miller Millermatic 255 MIG Welder 907734

The Miller Millermatic 255 MIG welder is a complete 250 amp welding package that comes standard with pulsed MIG welding capability. The inverter design means that the Millermatic 255 is less than half the weight of its popular predecessor, the Millermatic 252. Auto-Set™ Elite technology allows you to use preset welding parameters based on metal thickness, shielding gas and welding wire type to achieve optimum welds. You can also set your voltage and wire feed speed manually, for a custom welding arc.



The Millermatic® 255 comes complete with full color seven inch LCD screen with intuitive design and simple controls. In addition to built-in welding programs, the 255 can also store your custom welding programs. It seamlessly switches between welding with standard MIG gun or optional Spoolmatic™ spool gun. The 255 also features direct plug for XR push-pull gun for professional aluminum wire feed capability. This allows you to use 12 inch spools of aluminum MIG wire instead of the more expensive 1 lb rolls used with the spool gun.





  • MIG (GMAW)
  • Pulsed MIG (GMAW-P)
  • Flux Cored (FCAW)Applications
    General fabricators
    Contract welding services
  • Plant maintenance shops
  • Features:
  • Easy-to-understand interface with 7-inch color LCD display ensures proper machine setup and parameter selection, reducing setup time and increasing weld time. Quick-access backlit Auto-Set and Pulse buttons above the LCD display illuminate when active. Soft-key buttons below the display change function depending on which screen is displayed. Makes setup or change quick, easy and intuitive. Large text for easier readability. Intuitive connection setup images. Full troubleshooting descriptions versus help errors and look up codes.
  • 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. Available for MIG and pulsed MIG processes with the ability to fine-tune your settings. Set weld parameters by selecting wire and gas type, wire diameter and material thickness. Program mode allows easy save and recall of favorite weld settings. Deliver more productivity by eliminating the need to manually set the parameters. Deliver consistent quality by welders of all skill levels by using prequalified weld settings. Minimize supervisor need to intervene.
  • Pulsed MIG welding delivers higher quality welds for ALL welders. Lower heat input for less distortion on thin materials and better puddle control on out-of-position welds. Less spatter minimizes post weld grinding and rework allowing more welding time. Perform welding applications that couldn’t be done in the past. Ideal for MIG welding aluminum and stainless steel.
  • Compatible with push-pull MIG guns. Increases productivity by allowing the use of 12-inch wire spools versus a spool gun’s 4-inch spools. Reduces downtime changing wire spools.
  • Auto-Line™ allows for any single-phase input voltage hookup (208-240 V) with no manual linking, providing convenience in any job setting. Ideal solution for dirty or unreliable power.
  • Specs
  • Comes complete with:
  • Millermatic® 255 MIG welder with 10 ft. (3 m) power cord
  • 15 ft. (4.5 m) 250-amp Miller® MDX™ MIG Gun with 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
  • Extra contact tips
  • .035/.045 in. (0.9/1.2 mm) reversible drive rolls
  • Material thickness gauge
  • Power source with 10 ft. (3 m) power cord
  • 15 ft. (4.5 m) 250-amp MDX™-250 MIG gun w/ Bernard® AccuLock™ S consumables for .035/.045 in. (0.9/1.2 mm) wire
  • 10 ft. (3 m) work cable and clamp and 50mm Dinse-style connector
  • Flow gauge regulator and gas hose for argon or AR/CO2 mix
  • Extra contact tips
  • .035/.045 in. (0.9/1.2 mm) reversible drive rolls
  • Material Thickness Gauge


  • Shielding gas and safety equipment not included.
  • Shielding gas (for welding with solid wire [GMAW])
  • 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)


Aluminum Welding
Flux Cored (FCAW)


Title Millermatic® 255 MIG/Pulsed MIG Welder – 208/240V
Industries Interests Auto Repair
Boat / Yacht
Commercial Truck and Trailer
Education / Training
Farm and Ranch
Maintenance and Repair – Field Operations
Maintenance and Repair – In Plant
Metal Art / Sculptures
Racing / Customizing / Restoring
Material Thickness Mild Steel 24 ga. (.51 mm) – 1/2 (13 mm)
Aluminum 18 ga. (1.02 mm) – 1/2 (13 mm)
Weldable Metals Aluminum
Stainless Steel
Input Voltage 208 V
220/230/240 V
Input Phase 1-Phase
Input Hz 50/60 Hz
Input Amperage 31.4
Current Type DC
Rated Output 230 A at 25.5 V, 60% duty cycle
Max Open Circuit Voltage 87 VDC
Amperage Range Amperage Min Max 20 A – 350 A
Wire Feed Speed IPM Range 50 IPM – 800 IPM
Wire Diameter Solid Steel 0.023 in – 0.045 in
Stainless Steel 0.023 in
Flux Cored 0.03 in – 0.045 in
Aluminum 0.035 in – 0.047 in
Spool Size 12 in (305 mm)
Portability Handle(s)
Running Gear / Cart (Optional)
Weld Output CV
Net Width 13.75 in
Net Height 19.25 in
Net Length 26.25 in
Net Weight 84 lbs
Warranty 3 Years
Miller’s True Blue Warranty
Gtin 715959668873 SKU: 907734 Categories: , ,
Weight 84 lbs
Dimensions 26.25 × 13.75 × 19.25 in