Miller XMT 350 MPa Multiprocess Welder 208-575V Auto-Line

Miller XMT 350 MPa: The Ultimate Industrial Workhorse

When your welding projects demand more than just a standard arc, the Miller XMT 350 MPa delivers. Known as the most popular multiprocess welder in the industry, the XMT family combines portability with exceptional arc performance. The MPa model takes this a step further by integrating advanced pulsed MIG capabilities directly into the power source. This means you can achieve TIG-like weld appearance with the speed and simplicity of MIG welding, particularly on aluminum and stainless steel. Whether you are working in heavy equipment manufacturing, railcar repair, or structural steel, this machine provides the power and finesse you need.

Pulse Welding Made Simple

Pulsed MIG welding is no longer complicated with the XMT 350 MPa. The unit comes pre-loaded with pulse programs optimized for the most common industrial materials. Pulsing reduces heat input, minimizing distortion and burn-through on thin materials, while also allowing for all-position welding without the risk of cold lap. The addition of SharpArc control lets you dial in the perfect arc characteristics, giving you a wetter puddle for flat beads or a stiffer arc for tight corners.

Ready for Any Job Site

Gone are the days of worrying about input power compatibility. With Auto-Line technology, you can plug the XMT 350 MPa into practically any power source from 208V to 575V, single or three-phase, and start welding immediately. This makes it the ideal solution for contractors who move between sites with varying power infrastructures. The unit is also generator-friendly, smoothing out voltage spikes to ensure consistent performance even on dirty power.

Designed for the Welder

Miller has designed the interface to be intuitive and welder-friendly. The process selector switch simplifies setup, reducing the number of combinations you need to navigate. Large, dual digital meters are easy to read even in low light and allow you to preset weld output for precision repeatability. Features like Adaptive Hot Start for Stick welding prevent electrode sticking, while Lift-Arc allows for TIG arc initiation without high-frequency interference. Weighing in at only 80 lbs, it is easy to transport around the shop or lift onto scaffolding.

Note: This unit comes with Dinse-style connectors. If your cables use Tweco connectors, adapters or new connectors will be required.