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WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Miller® XMT® 350 MIGRunner™ 1 or 3 Phase CC/CV Multi-Process Welder With 208 - 575 Input Voltage, Auto-Line™ Power Management Technology

Airgas Part #:MIL951314

Manufacturer Part #:951314

$12,676.00 /Each

Item Details

  • Miller® XMT350 CC/CV 1/3-Phase Multiprocess Welder Machine has outstanding inverters with built-in features that provides ultimate productivity. Welder includes MIG runner cart and cylinder rack, S-74D wire feeder, Bernard™ Q™ gun and regulator/flow gauge with hose for better performance. It operates at voltage rating of 208 - 575 V with frequency of 60 Hz. Welder provides 34 A of welding output at 60% duty cycle that enables to improve deposition by using larger diameter electrodes common in construction applications. It is ideal for voltage sensing feeder work.


  • Auto-Line™ Power Management technology allows for any input voltage hook-up (208-575V) with no manual linking, providing convenience in any job setting. Ideal solution for dirty or unreliable input power
  • 350 amps of welding output at 60% duty cycle enables improved deposition through using larger diameter electrodes common in construction applications
  • Tweco-style output connectors provided standard on the XMT-350 VS. Eliminates the need for cable adapters at the construction site
  • Power factor of . 95 enables smaller fuses/breakers and primary wiring. Primary amperage draw at rated output is 25% less than the competition
  • Exceptional electrical efficiency. At 400 amps, efficiency is 87. 24%, this helps to reduce the utility bill or fuel supply required to weld
  • Inverter arc control technology provides greater puddle control for superior 6010 Stick electrode performance
  • Auto Remote Sense enables unit to automatically use remote control if connected to remote control receptacle (CC/CV models only)
  • Reduced OCV operation - an internal dip switch enables reduced open-circuit voltage Stick welding capability. OCV is typically below 15 volts
  • Process selector switch reduces the number of control setup combinations without reducing any features
  • Large, dual digital meters are easy to view and presettable to ease setting weld output
  • Pulsed MIG capabilities with optional Optima™ control reduces spatter and distortion, allows better out-of-position puddle control, and provides potential reduction of fume particle emission
  • Lightweight, aerospace-grade aluminum case offers protection with the benefit of reduced weight
  • Optional - 115 VAC auxiliary power provides 10 amps of circuit-breaker-protected power for water circulators, ect
  • Optional gas solenoid for TIG welding
  • Fan-On-Demand™ - Internal power source cooling system that only works when needed, keeping internal components cleaner
  • Lift-Arc™ start provides TIG arc starting without use of high frequency
  • Wind Tunnel Technology™ protects electrical components and PC boards from contamination, significantly improving reliability
  • Adaptive Hot Start™ automatically increases output amperage at the start of a weld should the start require it and prevents the electrode from sticking and creating an inclusion
  • LVC™ Line Voltage Compensation - Keeps output of the power source constant regardless of fluctuation in input power 10%™


  • ISO 9001 registered quality system
  • Yes Blue™ Three year warranty
  • Power source is warranted for 3 years, parts and labor
  • Original main power rectified parts are warranted for 5 years
  • Gun warranted for 90 days, parts and labor


  • Power Source
  • S-74D Wire Feeder
  • Bernard™ Q-Gun MIG welding gun
  • . 035 and . 045 in drive roll kit
  • Regulator/flowmeter with gas hose
  • MIGRunner Cart with cylinder rack
  • Bottom tray will hold optional Coolmate 3 (sold separately)


  • Construction
  • Shipbuilding
  • Railroad
  • Truck/Trailer Manufacturing
  • Fabrication
  • Repair Shops
  • Rental Fleets
  • Power Generation Plants

Product Attributes

Trade Name

» XMT® 350 MIGRunner™
» XMT®

Input AC Voltage

» 380V
» 208V
» 220V
» 230V
» 240V
» 400V
» 440V
» 460V
» 480V
» 575V

Output Mode



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

Output Voltage

» 38 V
» 10 V


» 1 or 3 Phase


» 60 Hz

Amperage Range

» 350 A

Duty Cycle

» Single-phase: 300 Amps At 32 Volt at 60% Duty Cycle
» Three-phase: 350 Amps At 34 Volt at 60% Duty Cycle

Power Supply Type

» Inverter


» 80 lb

Output DC Amps Max

» 425