K471-2 - Lincoln Magnum 400 MIG Gun, 15ft, 400A, Lincoln Backend

Heavy-Duty Industrial Performance

The Lincoln Electric Magnum® 400 MIG Gun (K471-2) is a premier choice for industrial fabrication environments requiring robust semi-automatic welding solutions. Engineered to deliver a substantial 400 amps at a 60% duty cycle using CO2 gas, this air-cooled gun is built to withstand the rigors of high-amperage applications. The K471-2 configuration comes ready to weld with a 15-foot cable and is set up for wire diameters ranging from .035 to .045 inches, making it immediately deployable for standard structural and manufacturing tasks. Its design philosophy centers on durability and operational continuity, ensuring that downtime due to equipment failure is minimized in demanding production schedules.

Rugged Construction and Maintenance

Durability is a hallmark of the Magnum® series. The gun cable is encased in an abrasion-resistant, extruded rubber jacket that provides superior strength and resistance to cuts, burns, and general shop wear compared to standard PVC jackets. This rugged exterior protects the internal copper stranding and liner, ensuring consistent arc performance over the life of the tool. Furthermore, the gun features a one-piece modular trigger assembly molded from high-heat-resistant material. This design not only withstands the intense radiant heat and spatter generated at 400 amps but also simplifies maintenance. The trigger utilizes high-quality silver contacts to ensure clean electrical signals and long operational life, reducing the frequency of component replacement.

Optimized Wire Feeding

The Magnum® 400 is designed to optimize fine wire welding performance. The gun tube is armored with an electrically insulated metal jacket, which protects the gooseneck while maintaining the precise geometry needed for smooth wire feeding. A rugged strain relief system at the feeder end reduces acute cable angles, protecting the liner and ensuring smooth wire delivery even when the operator is working at the full extension of the 15-foot cable. The internal extruded tube design offers excellent gas sealing integrity, preventing atmospheric contamination and ensuring high-quality weld deposits. This attention to the gas delivery system makes the gun suitable for both gas-shielded solid wire and flux-cored applications.