K2655-2 - Lincoln Magnum PRO 550 MIG Gun, 15 ft, 550A, Air Cooled

High-Performance Industrial MIG Gun

The Lincoln Electric Magnum PRO 550 (K2655-2) is a premier semiautomatic MIG welding gun engineered for the most demanding industrial environments. Designed to deliver a substantial 550 amps at 100% duty cycle using CO2 shielding gas, this air-cooled gun ensures continuous operation without overheating. It is also rated for 100% duty cycle at 375 amps with mixed gases, making it versatile for various welding procedures. The 15-foot cable assembly provides significant reach for large weldments, while the internal cable retention system ensures a robust connection that resists the mechanical stresses of daily shop use.

Advanced Consumable Technology

At the core of the Magnum PRO 550's performance is the Lincoln Electric Copper Plus contact tip technology. These tips are manufactured with a larger diameter and greater mass than standard tips, facilitating superior heat dissipation and significantly extending tip life. The gun also features a patent-pending Anti-Seize thread design on both the tip and diffuser, which prevents parts from fusing together under high thermal loads. This innovation simplifies maintenance and reduces downtime associated with consumable changeovers. Furthermore, the simplified expendable parts system allows for interchangeability of 250A, 350A, 450A, and 550A consumables across the entire Magnum PRO line.

Rugged Construction and Serviceability

Built with industrial-grade components, the Magnum PRO 550 utilizes high-quality copper and aircraft-grade aluminum parts to ensure optimal electrical contact and heat management. The Secure-Lock gun tube design effectively resists rotational slipping, maintaining consistent alignment during complex welds. For maintenance teams, the gun is designed with four trigger leads as a standard feature, allowing for rapid field repairs if a lead becomes damaged. This focus on serviceability and durability makes the K2655-2 an ideal choice for heavy fabrication, structural steel, and other high-amperage applications.