K471-6 - Lincoln Magnum 400 MIG Gun, 400A, 15 ft, 1/16-5/64 in

Heavy-Duty Industrial Performance

The Lincoln Electric Magnum 400 MIG Gun (K471-6) is engineered for professional welders who demand reliability and comfort in high-amperage applications. Rated at 400 amps with a 60% duty cycle using CO2 gas, this semi-automatic welding gun is built to withstand the rigors of heavy fabrication and structural steel work. The K471-6 model comes equipped with a liner specifically designed for larger wire diameters ranging from 1/16 inch to 5/64 inch (1.6 mm - 2.0 mm), making it an excellent choice for heavy deposition MIG and gas-shielded flux-cored welding.

Robust Construction and Design

Lincoln Electric has designed the Magnum 400 with durability in mind. The gun tube is armored with an electrically insulated metal jacket that optimizes fine wire welding performance while protecting internal components. The cable itself features a higher copper strand count than the smaller Magnum 300 series, ensuring efficient power transfer and heat management during prolonged welding sessions. An abrasion-resistant, extruded rubber jacket encases the cable, adding significant strength and longevity, even when dragged across rough shop floors.

Operator Comfort and Control

Despite its heavy-duty capabilities, the Magnum 400 prioritizes operator comfort. It features Lincoln's classic curved handle, which is lightweight and balanced to provide a sure grip and reduce hand fatigue over long shifts. The rotatable gooseneck (60° angle) allows welders to adjust the gun orientation to access tight spaces or awkward joints without compromising weld quality. The one-piece modular trigger assembly is molded from high-heat resistant material and utilizes silver contacts to ensure clean electrical signals and a long service life.