K2655-1 - Lincoln Magnum PRO 550 MIG Gun, 10ft Cable, 550A

High-Performance Industrial MIG Welding Gun

The Lincoln Electric Magnum PRO 550 Welding Gun (K2655-1) is a premier solution for heavy-duty semiautomatic welding applications. Engineered for the most demanding industrial environments, this air-cooled gun is rated at 550 Amps at 100% duty cycle when using CO2 shielding gas, and 375 Amps at 100% duty cycle with mixed gases. This high-capacity rating ensures that the equipment can withstand continuous operation without overheating, making it ideal for structural steel, heavy fabrication, and shipbuilding sectors where downtime is not an option.

Advanced Engineering and Construction

The Magnum PRO 550 features Lincoln Electric's proprietary Copper Plus contact tips. These tips are designed with a larger diameter and greater mass than standard tips, significantly improving heat dissipation and extending the life of the consumable. The gun also utilizes a patent-pending Anti-Seize tip and diffuser thread design, which mitigates the common issue of parts fusing together under high thermal stress. The Secure-Lock gun tube design is another critical engineering enhancement, providing a rigid, positive bond that resists rotational slipping, ensuring the gun remains in the desired orientation during complex welding maneuvers.

Versatility and Maintenance

Designed for versatility, the K2655-1 supports a wide wire diameter range from 0.035 inches to 1/8 inches (0.9 - 3.2 mm), accommodating various welding processes including MIG, Pulsed MIG, and Flux-Cored arc welding. The 10-foot cable assembly is robust yet flexible, featuring a retention system that resists pulling apart under tension. Maintenance is streamlined with the inclusion of four trigger leads for rapid field repair and a simplified expendable parts selection; consumables are interchangeable across the Magnum PRO 250, 350, 450, and 550 series, reducing inventory complexity for facility managers.