1770046 - Miller MDX-250 EZ-Select MIG Gun 15ft AccuLock S

Advanced Control with MDX-250 EZ-Select Technology

The Miller® MDX-250 EZ-Select™ MIG Gun (1770046) represents a significant leap in welding workflow efficiency, specifically engineered to interface seamlessly with the Millermatic® 255 and Multimatic™ 255 power sources. This 15-foot air-cooled gun is rated for 250 amps at 100% duty cycle when using CO2 shielding gas, making it a robust choice for industrial fabrication. The defining technical feature of this model is the EZ-Select™ trigger mechanism. This integrated control system allows the operator to cycle through up to four pre-set welding programs by tapping the trigger, with LED indicators on the handle providing immediate visual confirmation of the active program. This capability is particularly advantageous when utilizing pulsed MIG programs where parameter changes are frequent.

Mechanically, the MDX-250 utilizes the AccuLock™ S consumable system. This design addresses common wire feeding issues by locking the liner at both the front and rear of the gun. This dual-locking mechanism centers the liner perfectly with the contact tip, reducing friction and ensuring consistent wire delivery. The liner trimming process is simplified and error-proofed; the liner locks into place and is trimmed flush with the power pin, eliminating the need for precise measuring and reducing the risk of short liners or birdnesting. The gun comes factory-ready to feed .035 to .045 inch diameter wires.

The structural design prioritizes durability and ergonomics. The handle features a rubber overmold for secure handling in various positions, while a rear ball-and-socket swivel relieves cable tension, protecting the power cable from acute bending stresses and reducing operator fatigue during extended welding sessions. The connection style is optimized for Miller equipment, ensuring reliable conductivity and gas flow.