10401136 - Tweco Classic No. 4 MIG Gun 400A 15ft Miller Plug

Industry-Standard Reliability for Professional Welders

The Tweco® Professional Classic® No. 4 MIG Gun is a legend in the welding industry, trusted by fabricators for over 40 years. Designed for durability and performance, this 400-amp air-cooled gun is the go-to choice for medium to heavy-duty welding applications. Whether you are working in a production line, a maintenance shop, or on a farm, the Classic No. 4 delivers consistent results with solid, flux-cored, and aluminum wires. This specific model comes equipped with a 15-foot cable and a Miller® style rear connector, making it a direct replacement or upgrade for compatible Miller wire feeders.

One of the standout features of the Tweco Classic series is the ergonomic oval-shaped handle. Unlike round handles that can twist in the hand, the oval shape provides a natural grip that reduces the effort required to manipulate the gun, significantly lowering operator fatigue during long shifts. The gun is balanced to pivot at the center of the handle, further enhancing comfort and control in various welding positions. Additionally, a convenient gun hanger located at the bottom allows for safe and easy resting when the tool is not in use.

Maintenance and longevity are core to the Tweco design philosophy. The Classic No. 4 features a split-half handle case, allowing for quick and easy field repairs without the need for specialized tools. The patented Cablehoz® mechanical connection ensures a solid current path and is secured by ball-point screws, making cable replacement straightforward. With a wide selection of front-end consumables available—interchangeable with the Tweco Spray Master® series—you can keep your inventory costs low while ensuring your equipment is always ready for the next job.

Key Benefits for Your Shop:

• Proven Performance: Rated at 400 Amps (60% duty cycle with CO2) for reliable high-amperage welding.
• Ergonomic Design: Oval handle and balanced pivot point reduce welder fatigue.
• Easy Maintenance: Field-repairable design with accessible components minimizes downtime.
• Versatile Compatibility: Fits Miller® style feeders and accepts a wide range of wire sizes (.035" - .045").