XMT 350 FieldPro | MillerWelds

XMT® 350 FieldPro™ with Polarity Reversing, Tweco®

Outdated equipment threatens your productivity, profitability and safety.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.

Machine Only, Tweco

Machine Only, Dinse

Tweco, ArcReach Smart Feeder Pkg

ArcReach® Stick/TIG Remote with Polarity Reversing Pkg

Tweco®, ArcReach® SuitCase® 12 Pkg


ArcReach® Technology
ArcReach capabilities increase jobsite productivity and efficiency by eliminating the time spent tracing weld cables hundreds of feet back to the power source because weld operators can make voltage adjustments at the ArcReach wire feeder or remote.   Learn More
Cable Length Compensation
Cable Length Compensation (CLC™) ensures that the voltage a weld operator sets is the voltage they get by automatically adjusting voltage based on weld cable length, even hundreds of feet away from the power source (available only with XMT 350 FieldPro Systems).   Learn More
Exceptional Arc Performance
XMT 350 FieldPro systems maximize weld quality, reduce training time and minimize weld defects even while using weld cables that are hundreds of feet long.
Increased Uptime
XMT 350 FieldPro welders and ArcReach accessories have been extensively field-proven and deliver the performance you need with ruggedly constructed internal components and Wind Tunnel Technology™.
Improved Jobsite Safety
The chances of slip, trip and fall injuries are decreased because ArcReach technology allows weld operators to make parameter changes at the wire feeder or remote instead of having to travel through multistory and cluttered jobsites back to the power source.
Maximum Fleet Compatibility
Maximize fleet compatibility and get the benefits of ArcReach when you pair XMT 350 FieldPro welders and ArcReach feeders with other ArcReach compatible products.
Adjust While Welding
Weld operators have more control and can Adjust While Welding (AWW™) to make fast, easy weld parameter changes at the wire feeder or remote — even while the arc is on. Only Miller offers this advanced solution (available only with XMT 350 FieldPro Systems).   Learn More
Control Panel Lock Out
Inadvertent parameter changes by other jobsite workers can be avoided because connecting an ArcReach accessory to the power source automatically locks out the power source’s panel controls.
Auto-Process Select™
Automatically sets the power source to the correct weld process based on the polarity applied to the weld accessory and decreases the chance of an incorrect weld process.
Auto-Line™ Technology
Work in more places with Auto-Line technology which automatically calibrates the power source to operate properly when connected to any primary input voltage ranging from 208-575 volts, single- or three-phase, 50 or 60 Hz — with no manual linking required.   Learn More
ArcReach Heater Compatibility
Take charge of your field preheat and bakeout applications up to 600 degrees Fahrenheit (315°C). This system uses induction heating to generate heat in workpieces, so welders can do their own preheating quickly and safely. A part of the ArcReach technology platform, the ArcReach Heater is an accessory for select ArcReach welding power sources.   Learn More



Regulated Metal Deposition (RMD)

General Specifications

Title XMT® 350 FieldPro™ with Polarity Reversing, Tweco®
Industries Interests Shipbuilding
Construction and Fabrication
Amperage 15 A - 425 A
Weldable Metals Aluminum
Specialty Metals
Stainless Steel
Input Voltage 208 V
220/230/240 V
380/400 V
460/480 V
575 V
Rated Carbon Diameter 1/4 in (6.4 mm)
Input Phase 1- and 3-Phase
Input Hz 50/60 Hz
Current Type DC
Max Open Circuit Voltage 75 VDC
Portability Handle(s)
Running Gear / Cart (Optional)
Weld Output CC / CV
Applications Fabrication
Mobile Fabrication & MRO
Pressure Vessel
Welding Education and Training
Net Width 16 in
Net Height 19 in
Net Length 29 in
Net Weight 100.5 lbs
Warranty 3 Years
Miller's True Blue Warranty




XMT 350 FieldPro on construction site
pipe welding
Operator carbon arc gouges on a beam on an outdoor jobsite