K479-6 - Lincoln Magnum 400 MIG Gun, Fast-Mate, 400A, 15 ft, 1/16-5/64 in

Heavy-Duty Performance for High-Amperage Welding

The Lincoln Electric Magnum 400 Welding Gun (K479-6) is engineered for industrial durability and operator comfort. Designed to handle the rigors of high-amperage semi-automatic welding, this air-cooled gun is rated for 400 amps at a 60% duty cycle using CO2 gas. It is the ideal choice for fabrication shops and heavy equipment manufacturing where reliability and heat resistance are paramount. The K479-6 model comes equipped with a Fast-Mate™ connector, ensuring seamless integration with compatible Lincoln Electric wire feeders and power sources.

Superior Build Quality and Ergonomics

Lincoln Electric has designed the Magnum 400 with the operator in mind. The classic curved handle is lightweight and balanced, providing a comfortable grip that helps reduce hand fatigue during extended welding sessions. The gun features a rotatable gooseneck, allowing welders to adjust the angle of the torch to reach into tight spaces or weld in awkward positions without compromising weld quality. Internally, the gun boasts a higher copper strand count cable compared to the Magnum 300 series, ensuring efficient power transfer and heat dissipation.

Optimized for Heavy Wire Applications

This specific configuration includes a 15-foot cable and is set up with a liner capable of feeding wire diameters from 1/16 inch to 5/64 inch (1.6 mm - 2.0 mm). This makes it particularly well-suited for flux-cored gas-shielded operations and heavy MIG applications using larger diameter wires. The gun tube is armored with an electrically insulated metal jacket that optimizes fine wire welding performance, while the exterior cable is protected by a rugged, abrasion-resistant extruded rubber jacket that withstands the harsh conditions of industrial environments.

Reliable Components

Maintenance and longevity are key features of the Magnum series. The gun utilizes a one-piece modular trigger assembly molded from high-heat-resistant material to withstand spatter and ensure a long service life. The trigger features high-quality silver contacts that provide clean electrical signals for consistent arc starting. Additionally, the strain relief system is designed to reduce acute cable angles, protecting the liner and ensuring smooth wire feeding.