Miller Matic® 255 MIG/Pulsed MIG Welder – 208/240V

Availability : in stock

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.
Auto-Line™ Technology
For portability and reliability this inverter power supply 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.
Capabilities include MIG, pulsed MIG and flux-cored welding.
MDX-250 MIG Gun w/ 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 84 lb.
Weight is reduced by more than 50 percent compared to the Millermatic 252.
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 255 will be able to operate and provide full output when powered by generators with 12000 Watt (12K) output or higher. Limited output will occur when used with smaller generators.
What’s Included
• 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
Not Included
• 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)


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


20 A – 350 A

Material Thickness

Aluminum 18 ga. (1.2 mm) – 1/2 in. (12.7 mm)
Mild Steel 24 ga. (0.5 mm) – 1/2 in. (12.7 mm)

Weldable Metals

Stainless Steel

Input Voltage

208 V
220/230/240 V

Input Phase


Input Hz

50/60 Hz

Input Amperage


Current Type


Rated Output

230 A at 25.5 V, 60% duty cycle

Max Open Circuit Voltage

87 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.
Stainless 0.023 in. – 0.045 in.
Stainless 0.6 mm. – 1.2 mm.
Solid Steel 0.6 mm. – 1.2 mm.
Solid Steel 0.023 in. – 0.045 in.
Flux Cored 0.03 in. – 0.045 in.
Flux Cored 0.8 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)


Running Gear / Cart (Optional)

Weld Output


Net Width

13.75 in

Net Height

19.25 in

Net Length

26.25 in

Net Weight

84 lbs


3 Years


CSA Certificate of Compliance 80085654
CSA Certificate of Compliance 70209889

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