10401102 - Tweco Classic 4 MIG Gun, 400A, 12ft, Tweco Connection, .035-.045 Wire

Heavy-Duty Industrial MIG Gun

The Tweco Classic No. 4 MIG Gun (SKU: 10401102) is a premier choice for industrial welding applications requiring robust performance and reliability. Known in the industry as a standard-bearer for air-cooled MIG welding, the Classic 4 series is engineered to handle high-amperage welding cycles without compromising on maneuverability or component life. This specific model, the 412-3545, comes equipped with a 12-foot cable assembly, offering an optimal balance between reach and consistent wire feeding performance.

Rated at 400 Amps at a 60% duty cycle with CO2 gas (or 200 Amps at 60% with mixed gases), this gun is designed for heavy fabrication, structural steel, and manufacturing environments. It features a standard Tweco backend connection, ensuring seamless integration with wire feeders and power sources that utilize the Tweco style adapter. The gun is pre-configured with a liner and contact tip setup for .035" to .045" (0.9mm - 1.2mm) wire diameters, making it ready for immediate deployment in common steel welding tasks.

Maintenance and consumable replacement are straightforward, as the Classic 4 utilizes the widely available Tweco 14 Series contact tips, 24 Series gas nozzles, and 54 Series gas diffusers. The metal-jacketed conductor tube and heavy-duty handle construction provide exceptional resistance to impact and heat, ensuring a long service life even in the most demanding shop conditions. Whether replacing an aging fleet or outfitting a new station, the Tweco Classic 4 remains a top-tier specification for professional operations.