The Tweco Classic No. 4 MIG Gun (Part Number 10401115) represents the gold standard in air-cooled semi-automatic welding. Designed for heavy-duty fabrication, this 400-amp torch is engineered to withstand the rigors of harsh industrial environments, from shipyards to structural steel plants. The "Classic" series is renowned for its durability and simplicity, offering a field-repairable design that maintenance teams and welders trust. This specific model comes equipped with a generous 25-foot cable, providing the necessary reach for working on large assemblies without constantly moving the wire feeder.
Configuration is key when selecting a MIG gun, and this unit is factory-optimized for heavy deposition rates. It comes set up for 1/16-inch (1.6mm) welding wire, making it an excellent choice for flux-cored arc welding (FCAW) or heavy solid wire applications where high amperage and deep penetration are required. The backend connection is a standard Tweco style, ensuring seamless compatibility with wire feeders equipped with Tweco adapters or #4 connection blocks. This plug-and-play capability reduces setup time and ensures a secure, high-conductivity electrical connection.
Operator comfort is addressed through the signature Tweco oval handle. Unlike round handles that can twist in the hand, the oval shape provides a positive grip and allows the welder to orient the gun by feel, reducing hand fatigue during long shifts. The trigger mechanism is robust and designed for millions of cycles, ensuring reliable arc initiation every time. The cable assembly itself is constructed with high-quality copper stranding and a durable outer jacket that resists cuts, abrasion, and heat.
Maintenance is straightforward with the Tweco Classic No. 4. It utilizes the widely available 14 Series contact tips, 24 Series gas nozzles, and 54 Series gas diffusers. This commonality of parts simplifies inventory management for shops that run multiple Tweco guns. Whether you are welding thick plate steel or performing multi-pass structural welds, the Tweco Classic No. 4 delivers consistent wire feeding and arc stability.
| Additional Information |
|---|
| Amperage:400 |
| Length:25 ft |
| Wire Size:1/16" |
| Back End:Tweco |
| Brand:Tweco |
| Torch Type:MIG (GMAW), Air Cooled |
| Duty Cycle:60% @ 400A (CO2) |
| Cable Length:25 ft |
| Wire Diameter Capacity:1/16" (1.6mm) |
| Connection Type:Tweco Style |
| Handle Style:Classic Oval |
| Applications:Heavy Fabrication, Structural Steel, Shipbuilding |
| Packaging Description:pack of 1 |
