10401111 - Tweco Classic 4 MIG Gun, 400A, 10ft, Tweco Connection, 1/16 Wire

The Industry Standard for Heavy-Duty Welding

The Tweco Classic No. 4 MIG Gun (1040-1111) represents the gold standard in air-cooled semi-automatic welding torches. For decades, the "Classic" series has been the go-to choice for professional welders in heavy fabrication, structural steel, and shipbuilding industries. This specific model is configured with a 10-foot cable and a standard Tweco back-end connection, making it compatible with a vast array of wire feeders and power sources that utilize the ubiquitous Tweco adapter system.

Rated at 400 Amps at a 60% duty cycle (using CO2 gas), the Classic No. 4 is built to withstand high-heat environments and continuous welding operations without overheating. The gun features Tweco's signature paddle-style handle, which is ergonomically designed to reduce operator fatigue during long shifts. The trigger mechanism is robust and reliable, providing positive feedback and consistent arc initiation.

One of the key advantages of the Tweco Classic series is its serviceability. The gun is designed to be completely field-repairable. From the conductor tube to the cable assembly, every component can be replaced, extending the overall lifespan of the tool and providing exceptional return on investment. This model comes set up for 1/16" (1.6mm) welding wire, making it ideal for heavy deposition applications where larger diameter wires are required.

The cable assembly utilizes a heavy-duty outer jacket that resists cuts, abrasion, and burns, while the internal copper stranding ensures efficient current transfer. Metal spring strain reliefs at both the gun handle and the feeder connection point protect the cable from kinking, ensuring smooth wire feeding and consistent gas flow. Whether you are welding thick plate in a shop or performing repairs in the field, the Tweco Classic No. 4 delivers the performance and durability professional welders demand.