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Midland Tool

Miller XMT® 350 FieldPro™ Welder With ArcReach® and Polarity Reversing Technology

Item # 907731 Category

Outdated equipment threatens your productivity, profitability and safety. XMT® 350 FieldPro™ with Polarity Reversing Systems have industry leading technology with no need to manually swap polarity or cables/hoses between processes. The Quick-Select technology automatically selects the welding process, the correct polarity, cable outputs and welding parameters. Optimized Stick and TIG arc performance is specifically designed for open root pipe welding while reducing training time and increasing quality.

  • Easy to use:  The XMT 350 FieldPro with Polarity Reversing power source is streamlined and simplified to reduce setup time and potential weld defects. Push button process changeover eliminates the need for swapping cables. The robust design will withstand harsh environments common in the field.
  • Superior arc performance:  The optimized stick and TIG performance specifically meets the needs of open root pipe welding and helps reduce training time and increases quality. Starts maintain root opening and prepared edge and stops limit arc marks outside of the heat-affected zone.
  • Complete remote control:  The ArcReach® Stick/TIG Remote with Polarity Reversing provides all the same functionality of the XMT 350 FieldPro with Polarity Reversing hundreds of feet from the power source, including process changeover, and amperage adjustment with no special cables. Connect the ArcReach Stick/TIG Remote with Polarity Reversing in line with the electrode holder or TIG torch with standard welding cables and have complete remote control.




Heavy Industrial
Power Generation Plants


Air Carbon Arc Cutting and Gouging (CAC-A)
Flux Cored (FCAW)
Pulsed MIG (GMAW-P)
Stick (SMAW)

Polarity Reversing

The 'Quick-Select' technology automatically selects the welding process
the correct polarity
cable outputs and welding parameters.

Out Connection


Weldable Metals

Specialty Metals
Stainless Steel

Carbon Diameter


Input Phase


Input Power

208-575 V
Requires 3- or 1-phase power

Voltage Range in CV Mode

1-Phase: 10-38 V
3-Phase: 10-38 V

Amperage Range in CC Mode

1-Phase: 5-425 A
3-Phase: 5-425 A

Rated Output

1-Phase: 300 A at 32 VDC
60% Duty Cycle
3-Phase: 350 A at 34 VDC
60% Duty Cycle

Amperage Input @ Rated Output

1-Phase: 60.8 A at 208 V
54.6 A at 230 V
29.7 A at 400 V
24.5 A at 460 V
19.9 A at 575 V
11.7 A at KVA
11.2 A at KW
3-Phase: 40.4 A at 208 V
36.1 A at 230 V
20.6 A at 400 V
17.8 A at 460 V
14.1 A at 575 V
14.2 A at KVA
13.6 A at KW

Max Open Circuit Voltage

75 VDC

Input Hz

50 / 60 Hz

Current Type


Weld Output



17" H x 12.5" W x 24" D


93 lbs