K2655-4 - Lincoln Magnum PRO 550 MIG Gun, 550A, 25 ft Cable

Industrial Grade Performance for Heavy Fabrication

The Lincoln Electric Magnum® PRO 550 Semiautomatic Welding Gun (K2655-4) is engineered to deliver uncompromising performance in the most demanding industrial environments. Rated at 550 Amps at 100% duty cycle using CO2 shielding gas, this air-cooled gun is designed for high-amperage MIG, Pulsed MIG, and Flux-Cored welding applications where heat resistance and reliability are paramount. The 25-foot cable length offers extensive reach, making it ideal for large-scale structural fabrication, heavy equipment manufacturing, and shipbuilding.

Advanced Consumable Technology

This gun features Lincoln Electric's Copper Plus® Contact Tips, which utilize a larger tip diameter and increased mass to improve heat dissipation significantly. This design extends tip life and maintains stable electrical contact even under prolonged high-heat conditions. Additionally, the patent-pending Anti-Seize™ tip and diffuser thread design prevents parts from fusing together, ensuring that routine maintenance and consumable changes are quick and frustration-free.

Durability and Maintenance

Built with industrial-grade construction, the Magnum PRO 550 utilizes high-quality copper and aircraft-grade aluminum components to ensure superior electrical conductivity and heat management. The Secure-Lock™ gun tube design prevents rotational slipping, maintaining consistent alignment during operation. For maintenance teams, the gun includes four trigger leads as standard, facilitating fast field repairs and minimizing downtime. The simplified expendable parts selection means consumables are interchangeable across the 250A to 550A range, streamlining inventory management.