K3136-4 - Lincoln Magnum PRO 550 Dual Schedule MIG Gun 25ft 550A

Heavy-Duty Industrial Performance with Dual Schedule Control

The Lincoln Electric Magnum PRO 550 Dual Schedule Welding Gun (K3136-4) is engineered for the most demanding industrial environments where downtime is not an option. Designed for high-amperage, high-duty cycle applications, this air-cooled gun is rated at 550 amps at 100% duty cycle (with CO2), making it a powerhouse for heavy fabrication, shipbuilding, and structural steel work. The defining feature of this model is its Dual Schedule capability, which allows the welder to toggle between two distinct welding procedures directly from the gun trigger. This functionality significantly boosts productivity by eliminating the need to walk back to the wire feeder to adjust voltage or wire feed speed when switching positions or material thicknesses.

Durability is at the core of the Magnum PRO series. The gun utilizes Lincoln Electric's proprietary Copper Plus® contact tips, which boast a larger diameter and greater mass than standard tips. This design improves heat dissipation, extending tip life and reducing consumable costs over time. The gun also features a patent-pending Anti-Seize tip and diffuser thread design, ensuring that consumables can be changed quickly and easily even after hours of high-heat welding. The Secure-Lock gun tube prevents rotational slipping, maintaining consistent alignment and comfort throughout the workday.

Operator comfort is addressed with the Comfort Grip™ handle, a lightweight, balanced barrel-style design that minimizes hand fatigue. The 25-foot cable provides exceptional reach, allowing welders to access large assemblies without constantly moving the power source. Compatible with wire diameters ranging from 0.035 inches to 1/8 inch, the Magnum PRO 550 is a versatile tool for MIG, Pulsed MIG, and Flux-Cored processes. Whether you are running solid wire or heavy flux-cored electrodes, this gun delivers consistent arc performance and reliability.