CM415-3545 - Tweco Style 400A MIG Gun, 15ft Cable, Miller Connection

Heavy-Duty 400A MIG Gun for Industrial Fabrication

The CM415-3545 is a robust 400 Amp air-cooled MIG gun designed to serve as a high-performance replacement or upgrade for welders using Miller power sources. Engineered for durability and consistent wire feeding, this gun features a direct-connect Miller back end, ensuring seamless compatibility with a wide range of Miller wire feeders and integrated MIG machines. With a 15-foot cable assembly, it offers the necessary reach for working around large weldments, structural steel, and heavy machinery without compromising wire feed stability.

This torch is built on the industry-standard Tweco platform, specifically the heavy-duty #4 style architecture. This design choice is strategic for industrial environments, as it utilizes widely available and cost-effective Tweco-style consumables (14 Series contact tips, nozzles, and diffusers). Maintenance teams and fabricators appreciate the ease of finding replacement parts, reducing downtime and operational costs. The gun comes pre-configured with a liner and contact tip setup suitable for .035" to .045" solid or flux-cored wires, covering the most common industrial wire sizes.

Constructed to withstand the rigors of the shop floor, the cable assembly is reinforced with sturdy spring strain reliefs at both the handle and the machine connection points. This prevents kinking and protects the internal copper cabling and gas hose from damage during movement. The air-cooled design eliminates the complexity of water coolers while still providing sufficient cooling capacity for high-amperage welding at standard duty cycles. Whether for manufacturing, structural steel erection, or heavy equipment repair, this gun delivers the reliability professionals demand.