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1770043 - Miller MDX-250 MIG Gun 15ft AccuLock S Series

Packaging: 1 per ea
$1,152.73/ea $811.70/1 per ea only $811.70/eaSave 30%

In stock

OVERVIEW

The MIG Gun That Works With You

The best welding gun is the one you never have to think about because it just works. The Miller MDX-250 MIG Gun (15 ft) is designed with exactly that philosophy in mind. If you are tired of fighting with wire feeding issues, burnbacks, or a heavy, uncomfortable torch, the MDX-250 is the upgrade you have been waiting for. This model (1770043) comes ready to run .035" to .045" wire and features the heavy-duty AccuLock S consumables, giving you industrial durability right out of the box.

Comfort That Lasts All Shift

Welding fatigue is real, and a poorly balanced gun makes it worse. The MDX-250 features a completely redesigned ergonomic handle with rubber overmolding that fits naturally in your hand, providing a secure grip without requiring a death squeeze. The rear of the handle sports a ball-and-socket swivel strain relief, giving you a freer range of motion. Whether you are welding out of position or maneuvering around a large fabrication, the cable follows your movements smoothly, reducing the strain on your wrist and forearm.

Never Measure a Liner Again

One of the biggest headaches for any welder is changing a liner. Cut it too short, and you get chatter; cut it too long, and you get kinking. The MDX-250 solves this permanently with its error-proof liner trimming system. The liner loads from the front and locks into place, requiring no measuring whatsoever. It automatically aligns perfectly with the power pin and the contact tip, ensuring smooth wire delivery every single time. This means less downtime fixing birdnests and more time dropping dimes.

Built for Your Miller Machine

This gun is the perfect match for your Millermatic 252, 255, or Multimatic series welder. It is built to handle the heat, rated at 250 amps at 100% duty cycle with CO2. The AccuLock S tips are beefier than standard tips, meaning you will be making fewer trips to the tool crib for replacements. If you are running a Millermatic 212 or 252 and want to upgrade from the old M-25 gun, this is a direct plug-and-play replacement that will instantly modernize your machine's performance.

Additional Information
Brand:Miller
Amperage:250
Length:15 ft
Wire Size:0.035" - 0.045"
Back End:Miller
Packaging Description:1 per each
Cooling Method:Air Cooled
Duty Cycle:100% (CO2), 60% (Mixed Gas)
Consumable Series:AccuLock S
Compatible Machines:Millermatic 212, Millermatic 252, Millermatic 255, Multimatic 200, Multimatic 255
Cable Type:Increased Copper for Pulse

INCLUDED

  • Miller MDX-250 MIG Gun (15 ft / 4.6 m)
  • AccuLock S Contact Tips (.035 and .045 in)
  • AccuLock S Nozzle (5/8 in ID, Flush, Copper)
  • AccuLock S Diffuser
  • MDX Gun Liner (.035-.045 in)
  • Owner's Manual

APPLICATIONS

  • General Industrial Fabrication
  • Heavy Equipment Manufacturing
  • Automotive Repair and Customization
  • Maintenance and Repair Operations (MRO)
  • Structural Steel Fabrication
  • Farm and Ranch Welding
  • Shipbuilding and Marine Repair

FAQ

The MDX-250 (1770043) is compatible with the Millermatic 212 Auto-Set, Millermatic 252, Millermatic 255, Multimatic 200, and Multimatic 255. It is also a direct replacement for the legacy M-25 MIG gun.

AccuLock S consumables are designed for industrial applications with increased durability and longer life, while AccuLock MDX consumables are standard for lighter duty. This gun comes with AccuLock S parts but can use MDX parts if the diffuser is changed.

Yes, the gun comes pre-installed with a liner compatible with .035" to .045" wire diameters.

Yes, the MDX-250 features increased copper in the gun cable, ensuring reliable performance with CV and pulse waveforms, making it ideal for the Millermatic 255.

The MDX-250 features error-proof liner trimming. You simply install the liner and lock it; no measuring is required, preventing issues caused by improperly trimmed liners.

The MDX-250 is rated at 100% duty cycle with CO2 gas and 60% duty cycle with mixed gas at 250 Amps.

No, the MDX-250 uses the AccuLock system. Miller FasTip, M-Series, and Bernard Centerfire consumables are not compatible with MDX Series guns.

This specific SKU (1770043) comes set up for .035" to .045" (0.9 - 1.2 mm) wire.

CATALOGUE & SPEC SHEETS

Spec Sheet