The Miller Millermatic 255 MIG Welder (951766) represents a modern evolution in light manufacturing and fabrication welding equipment. Designed to replace the legendary Millermatic 252, this inverter-based power source weighs only 84 lbs—less than half the weight of its predecessor—while delivering a robust 350 amps of maximum output. This package includes the innovative EZ-Latch Single Cylinder Running Gear, which allows operators to quickly secure the machine to the cart or detach it for transport without tools, solving common mobility challenges in dynamic shop environments.
At the core of the Millermatic 255 is a 7-inch color LCD interface featuring Auto-Set Elite technology. This system simplifies setup by allowing users to select their wire diameter, material thickness, and gas mix, automatically configuring the optimal weld parameters. For advanced users, the machine offers full manual control and a Program Mode to save and recall frequently used settings. The unit supports input voltages of 208V or 240V single-phase through Auto-Line technology, which automatically adjusts to the power source without manual linking, ensuring consistent performance even on dirty power.
A standout feature for industrial applications is the integrated Pulsed MIG capability. Pulsed welding alternates between high peak current and low background current, significantly reducing heat input. This is critical for minimizing distortion on thin materials and reducing spatter, which in turn lowers post-weld cleanup time. The machine is optimized for aluminum welding and is compatible with XR push-pull guns, allowing for the use of 12-inch spools of aluminum wire for extended run times compared to standard spool guns.
The package comes complete with a 15-foot MDX-250 MIG gun equipped with AccuLock S consumables, designed for superior wire feeding and arc consistency. Whether for general fabrication, maintenance, or auto body work, the Millermatic 255 delivers versatility, portability, and precision.
| Additional Information |
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| Brand:Miller |
| Voltage:208/230 V |
| Amperage:350 |
| Weld Process:MIG (GMAW) |
| Duty Cycle:60% |
| Machine Cart:Mig Runner |
| Packaging Description:1 Per Ea |
| Process Type:MIG (GMAW), Pulsed MIG (GMAW-P), Flux Cored (FCAW) |
| Input Voltage / Phase:208/240 V, 1-Phase |
| Amperage Range:20 - 350 A |
| Rated Output:230 A at 25.5 V, 60% duty cycle |
| Wire Feed Speed Range:50 - 800 IPM |
| Max Open Circuit Voltage:87 VDC |
| Compatible Wire Sizes:Aluminum: 0.035-0.047 in, Steel: 0.023-0.045 in, Flux Cored: 0.030-0.045 in |
| Net Weight:84 lb (Machine Only) |
| Warranty:3 Years True Blue Warranty |
