10361727 - Tweco Spray Master 350A MIG Gun, 15ft, Lincoln Plug, 1/16 Wire

Heavy-Duty Tweco Spray Master MS315 MIG Gun

The Tweco Spray Master MS315 (SKU: 10361727) is a premium air-cooled MIG gun designed for high-performance industrial welding. Part of the legendary Spray Master series, this gun is engineered to handle the rigors of spray transfer welding, a process that generates significant heat. Rated at 350 Amps at an 80% duty cycle using CO2 gas, the MS315 delivers consistent power delivery and durability for heavy fabrication environments. This specific configuration features a 15-foot cable assembly, providing ample reach for working around large assemblies or fixtures without moving the wire feeder constantly.

One of the critical specifications of this model is its rear connection. It is outfitted with a Lincoln-style direct plug, making it immediately compatible with Lincoln Electric wire feeders and power sources that utilize this standard connection type. This eliminates the need for complex adapter kits, ensuring a secure and conductive link right out of the box. Furthermore, the gun is pre-setup for 1/16-inch (1.6mm) welding wire. This larger diameter capacity is typical for structural steel flux-cored applications or heavy aluminum welding, aligning perfectly with the high-amperage capabilities of the Spray Master platform.

Maintenance and longevity are core to the Tweco design philosophy. The Spray Master series utilizes the widely available Tweco 11 Series contact tips, 52/54 series gas diffusers, and adjustable nozzles. The conductor tube is designed to dissipate heat rapidly, keeping the front-end consumables cooler and extending their service life. The cable assembly is reinforced to resist cuts, abrasion, and burns, ensuring that the gun survives the harsh conditions of shipyards, trailer manufacturing, and heavy equipment repair.