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The Miller MDX-250 MIG Welding Gun (SKU: 1770042) is a high-performance, air-cooled torch engineered for industrial fabrication and heavy-duty maintenance applications. Rated at 250 Amps, this gun is designed to integrate seamlessly with Miller wire feeders and power sources, specifically the Millermatic 212 Auto-Set, 252, 255, and Multimatic 200 and 255 units. The assembly features a 12-foot cable and comes factory-configured for .035 to .045 inch (0.9 - 1.2 mm) wire diameters using the advanced AccuLock S consumable system.
Technically, the MDX-250 distinguishes itself with its pulse welding capability. The gun cable is constructed with increased copper content, ensuring reliable performance and stability when utilizing CV and pulse waveforms, a critical factor for modern advanced process welders. The duty cycle is rated at 100% when using CO2 shielding gas and 60% when using mixed gases, providing substantial thermal overhead for continuous operation in demanding environments.
The core innovation of the MDX series lies in the AccuLock S consumable platform. This system utilizes a front-loading liner that is locked and concentrically aligned with the contact tip and power pin. This alignment eliminates the gap between the liner and the tip, maximizing electrical conductivity and minimizing heat generation. The tapered mating surfaces between the contact tip and the gas diffuser further enhance this conductivity, locking the tip securely in place to prevent loosening due to thermal cycling. For maintenance personnel, the error-proof liner trimming feature eliminates the need for precise measuring, reducing downtime and training requirements associated with liner replacement.
The rear connection utilizes a standard Miller-style termination, ensuring broad compatibility across the manufacturer's equipment range. The gun is shipped with a standard nozzle (N-A5800C), diffuser (D-MA250), and the appropriate liners, making it ready for immediate deployment in structural steel, manufacturing, and general fabrication workflows.
| Additional Information |
|---|
| Packaging Description:1 Per Ea |
| Brand:Miller |
| Amps:200amp, 250amp |
| Length :12 ft |
| Front End:Miller |
| Back End:Miller |
| Wire Size:0.035/0.045 |
| Item:Gooseneck |
| Cooling Method:Air Cooled |
| Duty Cycle:100% with CO2, 60% with Mixed Gas |
| Consumable Series:AccuLock S |
| Cable Length:12 ft |
| Rear Connection:Miller Style |
