10401088 - Tweco Spray Master MS450-15M MIG Gun for Miller Feeders

Heavy-Duty Air-Cooled Performance

The ESAB Tweco Spray Master 450 (MS450-15M) is a premium air-cooled MIG gun designed to deliver exceptional performance in high-amperage applications. Engineered for the most demanding industrial environments, this gun is rated at 450 Amps at an 80% duty cycle using CO2 gas, making it ideal for structural steel, heavy equipment manufacturing, and general fabrication where spray transfer modes are frequently utilized. The internal SKU TWE10401088 identifies this specific configuration, which comes equipped with a 15-foot (4.6-meter) cable and a direct Miller-style rear connection, ensuring seamless integration with compatible Miller wire feeders and power sources.

Legendary Tweco Design

The Spray Master series is built around the operator's comfort and the shop's efficiency. It features a patented ergonomic handle design that fits naturally in the hand, reducing grip force and operator fatigue during long welding shifts. The gun utilizes the industry-standard Tweco 11 Series contact tips, 54 Series gas diffusers, and 24 Series nozzles. These consumables are widely available and cost-effective, simplifying inventory management for large shops. The conductor tube is constructed from heavy-wall copper alloy to dissipate heat effectively, and it can be rotated 360 degrees to allow access to difficult-to-reach weld joints without straining the cable or the welder's wrist.

Reliability and Maintenance

Maintenance of the MS450 is straightforward, designed to minimize downtime. The simplified direct rear connection reduces the number of electrical interfaces, which lowers resistance and heat generation at the feeder connection point. The cable assembly is encased in a durable, abrasion-resistant jacket that protects the copper stranding and gas liner from shop floor hazards like hot slag, metal shards, and heavy traffic. Whether running solid wire for mild steel or flux-cored wires for structural work, the Tweco Spray Master 450 provides the consistent arc stability and wire feeding reliability required for code-quality welds.