K479-2 - Lincoln Magnum 400 MIG Gun 15ft Fast-Mate

Heavy-Duty Industrial Performance

The Lincoln Electric Magnum 400 MIG Gun (K479-2) is engineered for high-amperage industrial environments where reliability and durability are paramount. Designed to handle 400 amps at a 60% duty cycle using CO2, this semi-automatic welding gun is a staple in heavy fabrication, structural steel, and equipment manufacturing. The K479-2 model features Lincoln's proprietary Fast-Mate connection, a Euro-style back-end that ensures a secure, high-conductivity interface with the wire feeder, reducing voltage drop and ensuring consistent arc performance.

Constructed with the professional fabricator in mind, the Magnum 400 utilizes an abrasion-resistant, extruded rubber jacket that protects the internal power cable and liner from the harsh realities of the shop floor. This rugged exterior prevents cuts and wear from dragging across steel plates or concrete, significantly extending the lifespan of the assembly. Inside, the gun tube is armored with an electrically insulated metal jacket, which not only protects the conductor but also optimizes fine wire welding performance by maintaining liner integrity.

Maintenance and consumable management are streamlined with the Magnum series. The gun uses standard Lincoln Magnum consumables, which are widely available and easy to replace. The one-piece modular trigger assembly is molded from high-heat-resistant material, designed to withstand the spatter and radiant heat generated during high-amperage welding. This modular design allows for quick serviceability, minimizing downtime. Whether running solid MIG wire or flux-cored wires, the Magnum 400 delivers the consistent feedability and electrical transfer required for code-quality welds.

Technical Specifications and Compatibility

This assembly comes ready to weld with a 15-foot cable, providing ample reach for large weldments. It is configured for wire sizes ranging from .035 to .045 inches (0.9–1.2 mm), making it versatile for various material thicknesses. The Fast-Mate connection simplifies fleet management by allowing this gun to be used on any machine equipped with a compatible Fast-Mate or Euro-adapter block. The air-cooled design eliminates the need for water coolers, reducing system complexity while still managing the heat of 400A applications effectively.