K471-14 - Lincoln Magnum 400 Semiautomatic MIG Gun, 25 ft, .052-1/16 in

Heavy-Duty Performance for Industrial Fabrication

The Lincoln Electric Magnum 400 Gun (K471-14) is a premier semiautomatic MIG welding solution designed for high-amperage environments where durability and performance are non-negotiable. Engineered to handle a rated amperage of 400 amps at a 60% duty cycle with CO2 gas, this gun is built to withstand the rigorous demands of heavy fabrication, structural steel work, and equipment manufacturing. The K471-14 model specifically features an extended 25-foot cable assembly, providing welders with exceptional reach and flexibility to maneuver around large workpieces without constantly repositioning the wire feeder.

At the core of the Magnum 400's design is a focus on longevity and consistent wire feeding. The cable features a higher copper strand count compared to lower amperage models, ensuring efficient power transmission and reduced heat buildup within the cable itself. The outer jacket is constructed from abrasion-resistant extruded rubber, which protects the internal components from the rough conditions typical of industrial shop floors. Furthermore, the gun tube is armored with an electrically insulated metal jacket, a feature that optimizes fine wire welding performance by reflecting radiant heat and preventing electrical shorts.

This specific configuration is set up for wire sizes ranging from .052 inch to 1/16 inch (1.3 to 1.6 mm), making it ideal for depositing large volumes of weld metal efficiently. It supports both standard MIG (GMAW) and gas-shielded flux-cored (FCAW-G) processes. The inclusion of a rotatable 60-degree gooseneck further enhances the tool's versatility, allowing operators to achieve high-quality welds even in restricted spaces or awkward joint configurations. Maintenance is streamlined with a one-piece modular trigger assembly, molded from high-heat resistant material to resist spatter adhesion and ensure reliable arc initiation shift after shift.