10401134 - Tweco Classic #4 MIG Gun for Miller Welders - 400A, 12ft

Heavy-Duty Tweco #4 MIG Gun for Miller Feeders

The Tweco Classic #4 MIG Gun is widely regarded as the workhorse of the industrial welding world. Designed for welders who demand reliability and durability, this 400-amp air-cooled gun is engineered to withstand the rigors of heavy fabrication, structural steel work, and manufacturing environments. This specific model (SKU 10401134) comes pre-configured with a Miller-style back-end connection, making it a direct plug-and-play replacement for many Miller wire feeders and welding machines.

With a 12-foot (4-meter) cable, this gun offers excellent reach for working around large assemblies while maintaining a cable length that promotes smooth, consistent wire feeding. The cable itself is constructed with high-quality materials to resist abrasion, cuts, and burns, ensuring a long service life even on the toughest job sites. The metal-jacketed conductor tube provides superior durability compared to plastic alternatives, maintaining alignment and current transfer efficiency over time.

One of the primary advantages of the Tweco #4 platform is its consumable system. It utilizes the ubiquitous Tweco 14-series contact tips, 24-series nozzles, and 54-series gas diffusers. These consumables are the industry standard, meaning replacements are cost-effective and readily available at almost any supply shop. The gun features a heavy-duty contact tip holder and a gas diffuser designed to optimize shielding gas coverage, reducing porosity and improving weld quality.

The handle of the Tweco #4 is designed with ergonomics in mind, featuring a comfortable grip and a responsive trigger that reduces operator fatigue during long welding shifts. The connection to the machine is secure and robust, ensuring minimal voltage drop and consistent arc performance. Whether you are welding mild steel, stainless steel, or flux-cored applications, the Tweco #4 MIG Gun delivers the performance professionals trust.