The Tweco Classic No. 4 MIG Gun (SKU: 10401912) represents the gold standard in air-cooled semi-automatic welding torches. Known internally as the TWE1040-1912, this assembly features a 15-foot cable and a standard Tweco rear connection, making it an immediate drop-in replacement for wire feeders equipped with Tweco-style adapters. Designed for high-volume industrial environments, the Classic No. 4 is engineered to withstand the rigors of heavy fabrication, structural steel work, and equipment manufacturing.
This model is rated for 400 Amps at a 60% duty cycle when using CO2 shielding gas, providing ample power for running large diameter flux-cored wires or solid wires in spray transfer modes. The gun comes pre-configured with a specific liner and contact tip setup (indicated by the V415564 designation), typically optimized for standard steel wire sizes. Its modular design ensures that distributors and maintenance teams can easily stock and replace individual components—from the trigger switch to the conductor tube—minimizing total cost of ownership over the lifespan of the unit.
The 10401912 utilizes the widely available Tweco 14 Series contact tips, 24 Series gas nozzles, and 44 Series gas diffusers. This cross-compatibility simplifies inventory management for supply chains. The 15-foot cable length offers a balance between wire feedability and operator mobility, suitable for most standard welding cells. The connection pin is a solid brass Tweco connector, ensuring optimal electrical conductivity and secure retention in the drive roll housing.
For industrial suppliers, the Tweco Classic No. 4 is a high-turnover essential. It is one of the most recognized MIG platforms in North America. Its reputation for reliability means fewer warranty claims and higher customer satisfaction. Whether your clients are retrofitting older machines or outfitting new production lines, the Classic No. 4 remains the preferred choice for operators who demand a gun that feels right and performs consistently shift after shift.
| Additional Information |
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| Process Type:MIG (GMAW), Flux Cored (FCAW) |
| Cooling Method:Air Cooled |
| Connection Type:Tweco Style |
| Duty Cycle:60% @ 400A (CO2) |
| Wire Diameter Capacity:Up to 5/64" (2.0mm) |
| Amps:400 |
| Cable Length:15 ft |
| Brand:Tweco |
| Packaging Description:1 Per Ea |
