10401531 - Tweco Spray Master MS450 MIG Gun, 450A, 15ft, 1/16in Wire, Miller Connection

Heavy-Duty Industrial MIG Welding Solution

The Tweco Spray Master MS450 MIG Gun (Part Number: 1040-1531) is a premier air-cooled welding torch designed for high-amperage industrial applications. Engineered to operate at 450 Amps with an 80% duty cycle using CO2 gas, this gun is specifically built to handle the rigorous thermal demands of spray transfer welding and flux-cored applications. This specific configuration (MS415M116K4) comes equipped with a 15-foot cable and a Miller-style backend connection, ensuring immediate compatibility with Miller wire feeders and power sources.

The Spray Master series distinguishes itself through superior thermal management. It utilizes a heavy-duty contact tip and diffuser system that efficiently transfers current while dissipating heat, significantly extending consumable life compared to standard MIG guns. The conductor tube is capable of rotating 360 degrees, allowing the operator to adjust the torch angle for optimal access to joints without straining the cable or the welder's wrist. The gun is factory-configured for 1/16-inch (1.6mm) wire, making it ready for heavy structural steel fabrication, shipbuilding, and heavy equipment manufacturing right out of the box.

Maintenance and downtime are critical factors in industrial environments. The Tweco Spray Master addresses this with a simplified design that allows for rapid field repairs. The cable connection is robust, minimizing electrical resistance, while the trigger mechanism is tested for durability in harsh shop environments. By utilizing standard Tweco consumables, supply chain management for wear parts is streamlined and cost-effective.

Technical Specifications

• Amperage Rating: 450A @ 80% Duty Cycle (CO2)


• Cable Length: 15 Feet (4.5 Meters)


• Wire Diameter Capacity: Setup for 1/16" (1.6mm)


• Connection Style: Miller


• Cooling: Air Cooled