10401051 - Tweco Spray Master MS412 MIG Gun, 400A, 12ft, 1/16 Wire, Tweco Connection

Heavy-Duty Industrial Performance

The Tweco Spray Master MS412 MIG Gun (SKU: 1040-1051) is a premier solution for high-amperage welding applications. Part of the renowned Spray Master series, this gun is engineered to withstand the rigors of heavy industrial environments, offering a robust 400-amp rating at a 60% duty cycle. It is specifically configured for running 1/16-inch (1.6mm) welding wire, making it the ideal choice for structural steel fabrication, heavy equipment manufacturing, and shipbuilding where high deposition rates are required.

The gun features a 12-foot (3.6m) cable assembly, which provides a practical balance between operator mobility and consistent wire feeding performance. Longer cables can sometimes introduce drag on thicker wires, but the 12-foot length ensures smooth delivery of the 1/16" wire while maintaining excellent electrical conductivity. The unit terminates in a standard Tweco backend connection, ensuring seamless compatibility with a vast range of wire feeders and power sources commonly found in industrial settings.

Maintenance and consumable management are simplified with the Spray Master platform. The MS412 utilizes industry-standard Tweco 11 Series contact tips, 52/54 Series gas diffusers, and adjustable slip-on nozzles. This commonality of parts reduces inventory complexity and ensures that replacement consumables are readily available. The air-cooled design is optimized with heavy-duty copper stranding within the cable to maximize heat dissipation, protecting both the equipment and the operator from excessive heat buildup during long weld cycles.