XMT®, Invision™, AlumaPower™ Inverter MIGRunner™ Cart
Compact 4-wheel cylinder cart. Small footprint, low rack, HD ergonomic handles for secure, efficient transport.
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XMT® 400
Multiprocess Welder
907881
Selection Option
About The XMT® 400
208 V, XMT® multiprocess power source delivers up to 425 A. Features ArcConnect™, Legacy meets pulse, and Auto-Line™ Technology for flexible, reliable welding across materials and varying power conditions.
Stay in the Zone All Day With a Workhorse Multiprocess Welder
The XMT® 400 doesn’t just keep up — it levels up. Designed for today’s overloaded welders, it’s a major evolution of the XMT family that delivers power and simplicity without the learning curve. Intellx™ wire feeder compatibility can unlock a suite of solutions that scale with your welding operation to keep you confident when unexpected challenges arise. And backed by unwavering Miller reliability, it’s simpler than the competition and supported long after the sale.
XMT® 400: Multiprocess Welder
Features You Need
Features You Need
The Benefits of All XMT Machines You Know You Can Count On
- Multiprocess
- 14-pin compatible
- Auto-Line™
- Pulse process*
- Intuitive interface
- Legendary reliability
*When paired with Intellx™ Pro
The Benefits That Put the XMT® 400 in a League of Its Own
- Adaptable to your environment
- ArcConnect™ compatible
- 400 amps at 60% duty cycle
- Advanced processes**
- Reduced maintenance and repair costs
**When paired with Intellx™ Elite
Solutions That Scale With Your Operation's Needs
When used with various Intellx feeders, the XMT 400 gains access to different welding capabilities. See which feeder is the right fit for your operation.
| Features | Intellx™ Basic | Intellx™ Pro | Intellx™ Elite |
| Arc Control | X | X | X |
| EZ-Set | X | X | |
| Accu-Pulse® | X | X | |
| Versa-Pulse® | X | ||
| Regulated Metal Deposition (RMD®) | X | ||
| High-Deposition (HD) MIG | X |
Intellx Wire Feeder
Intellx Wire Feeder
This is the first XMT power source with Intellx wire feeder compatibility, making it a powerful tool for boosting performance and maximizing efficiency when the shop gets busy.
Features
ArcConnect™
Next generation communication to improve weld performance and allow point-of-use controls to be located at the feeder.
Legacy meets pulse
Pulsed MIG-capable with Intellx Pro or Elite feeder provides a 28-percent wider operating window and a more forgiving arc, compensating for variations in operator technique. Welders of any skill level can get into production quicker.
Auto-Line™ Technology
Allows hookup to either single-phase or three-phase primary input voltage, 208-600 volts dependent on the machine, with no manual linking, providing convenience in any job setting. An ideal solution for dirty or unreliable input power.
Wind Tunnel Technology™
Internal air flow that protects internal components from dirt, dust, debris— greatly improving reliability.
Dedicated wire feeder options
Intellx Elite feeder — New arc control feature means welders can produce better welds with minimal parameter adjustments. Intellx Pro feeder — Adds Accu-Pulse®, EZ-Set, steel weld programs, and memory buttons.
Fan-On-Demand™
Power source cooling system operates only when needed, reducing noise, energy use, and the amount of contaminants pulled through machine.
Auto Remote Sense™
Enables unit to automatically use remote control if connected to remote control receptacle.
Backwards Compatibility
A model is available with both ArcConnect and the standard Miller 14 Pin for use with older Miller wirefeeders.
Easy to use
EZ-Set simplifies parameter setup based on material thickness, removing complexity and reducing welder training time.
Ready to weld
The welding system is shipped as a complete package with everything you need to get welding sooner. Just hook up your primary power, add gas, wire and a welding gun, and you're ready to weld.
Setup & Software
Setup & Software
Find information on welding system setup, training and services to get the most out of your products.
Accessories
Tech Specifications
Discover technical info about this product
Explore The Series
XMT® 400
Multiprocess power source. 400 A at 60% duty cycle. Auto-Line and weld processes included.
XMT® 400 ArcReach®
400 A multiprocess source, 60% duty, with ArcReach, Auto-Line, and dedicated weld processes.
XMT® 650
Built for harsh environments and heavy steel fabrication from precise to power-intensive.
XMT® 650 ArcReach®
Ideal for structural steel fabrication, general construction, and shipbuilding.
XMT® 650 ArcReach® with Polarity Reversing
XMT 650 ArcReach Systems for structural steel fabrication, general construction, and shipbuilding.
XMT® 450
Portability and excellent arc performance make the XMT family the most popular in the industry.
Miller True Blue® Warranty
Miller True Blue® Warranty
With the best coverage in the industry, Miller's True Blue® Warranty delivers unparalleled peace of mind.
Owner's Manuals
From safety precautions, operations/setup information, and maintenance, to troubleshooting and parts lists, Miller's manuals provide detailed answers to your product questions.