K471-11 - Lincoln Magnum 400 Semiautomatic MIG Gun, 20ft, .052-1/16 Wire

Heavy-Duty Performance for High Amperage Welding

The Lincoln Electric Magnum 400 Welding Gun (K471-11) is engineered to meet the demands of heavy industrial fabrication. Designed for semiautomatic MIG and gas-shielded flux-cored welding, this gun delivers a rated output of 400 amps at a 60% duty cycle using CO2 gas. It is specifically configured to handle larger wire diameters ranging from .052 to 1/16 inch (1.2-1.6 mm), making it an excellent choice for structural steel, heavy equipment manufacturing, and other applications requiring high deposition rates.

Robust Construction and Durability

Durability is central to the Magnum 400 design. The gun features a higher copper strand count cable compared to lower amperage models, ensuring efficient power transmission and heat management during prolonged welding sessions. The cable is protected by an abrasion-resistant, extruded rubber jacket that adds significant strength and longevity, preventing wear from dragging across shop floors or around sharp corners. The gun tube itself is armored with an electrically insulated metal jacket, optimizing fine wire performance while reflecting radiant heat away from the internal components.

Precision and Maintenance

The K471-11 is built with a one-piece modular trigger assembly molded from high heat-resistant material. This design withstands spatter and high temperatures while housing high-quality silver contacts that ensure clean electrical signals and a long service life. The rugged strain relief system at the feed end reduces acute cable angles, protecting the liner and ensuring smooth wire feeding. Additionally, the gooseneck is rotatable, allowing welders to adjust the angle for better access to awkward joints without compromising the weld quality.

Extended Reach

This specific model comes equipped with a 20-foot (6.1 meter) cable, providing exceptional reach for large assemblies where moving the power source is impractical. Despite its heavy-duty capabilities, the gun maintains a focus on operational efficiency, utilizing standard Lincoln Electric consumables compatible with other leading brands to simplify inventory management.