K471-10 - Lincoln Magnum 400 MIG Gun, 400A, 20ft Cable, .035-.045 Liner

Industrial-Grade Performance for High-Amperage Welding

The Lincoln Electric Magnum 400 Semiautomatic Welding Gun (K471-10) is engineered to meet the rigorous demands of heavy fabrication and industrial manufacturing. Designed for operators who require consistent performance at higher amperages, this air-cooled gun is rated for 400 amps at a 60% duty cycle using CO2 shielding gas. The K471-10 configuration comes equipped with a 20-foot cable assembly, providing significant reach for working on large weldments without moving the wire feeder. It is pre-configured with a liner suitable for .035 to .045 inch (0.9 to 1.2 mm) wire diameters, making it ready for immediate deployment in standard structural and fabrication tasks.

Durability is a core component of the Magnum 400's design architecture. The gun tube is armored with an electrically insulated metal jacket, which not only protects the internal components but also optimizes fine wire welding performance. To withstand the physical abuse of the shop floor, the cable is encased in an abrasion-resistant, extruded rubber jacket. This adds substantial strength and prevents wear from dragging across concrete or steel surfaces. Internally, the cable features a high copper strand count, ensuring efficient conductivity and heat dissipation, which is critical for maintaining the 400A rating during extended arc times.

Maintenance and serviceability are streamlined with the Magnum 400. The unit features a one-piece modular trigger assembly molded from high-heat-resistant material. This design withstands spatter and radiant heat while housing high-quality silver contacts that ensure clean electrical signals and a long operational life. The gun also utilizes industry-standard expendable parts—contact tips, gas diffusers, and nozzles—that are compatible with other leading brands, simplifying inventory management for consumables. The rotatable gooseneck further enhances versatility, allowing welders to adjust the gun angle for optimal access to awkward joints or tight spaces.

This model is suitable for both gas-shielded MIG (GMAW) and gas-shielded flux-cored (FCAW-G) welding processes. While configured for .035-.045 wire out of the box, the Magnum 400 platform is capable of handling wire diameters up to 1/16 inch (1.6 mm) with the appropriate liner and contact tip changes, offering flexibility for various production requirements.