10361646 - Tweco Spray Master 350A MIG Gun, 12ft, Lincoln Connection, 1/16 Wire

Technical Overview of the Tweco Spray Master MS312

The Tweco Spray Master MS312 (SKU: 1036-1646) is a premium air-cooled MIG gun designed for high-amperage industrial welding applications. Rated at 350 Amps at an 80% duty cycle using CO2 gas, this gun is engineered to withstand the rigors of heavy fabrication environments. This specific configuration features a 12-foot cable assembly, providing a balance between reach and wire feedability, and is terminated with a Lincoln-style rear connection, ensuring seamless integration with compatible Lincoln Electric wire feeders and power sources.

Internally, the gun is set up to run 1/16-inch (1.6mm) welding wire, making it ideal for structural steel, heavy equipment manufacturing, and other applications requiring high deposition rates. The Spray Master series is distinguished by its simplified design which reduces downtime; the contact tips, nozzles, and diffusers are easily accessible and replaceable. The conductor tube is capable of 360-degree rotation, allowing the welder to adjust the torch angle for difficult-to-reach joints without straining the cable.

The cable assembly utilizes high-quality copper stranding for efficient current transfer and is protected by a durable outer jacket that resists cuts, abrasion, and heat. The connection pin configuration and gas porting are specifically matched to the Lincoln standard, eliminating the need for adapters. Maintenance personnel will appreciate the modular design, which allows for the replacement of the trigger switch, gooseneck, and cable liner independently, extending the overall service life of the tool.