10501133 - Tweco Classic No. 5 MIG Gun, 500A, 15ft, Tweco Connection

Tweco Classic No. 5: The Heavy-Hitter of Air-Cooled Guns

When the job calls for high heat and long arc-on times, the Tweco Classic No. 5 MIG Gun is the tool of choice for professional welders. With a massive 500 Amp rating, this torch bridges the gap between standard air-cooled guns and complex water-cooled systems. It is designed specifically to handle large diameter wires (up to 3/32" or 2.4mm with proper liner) and high deposition rates, making it a staple in foundries, railcar shops, and heavy fabrication plants.

Superior Thermal Management

Heat is the enemy of any welding gun, but the Classic No. 5 is built to manage it. The heavy-walled copper gooseneck and specialized electrical insulation allow the gun to run cooler for longer periods. The air-cooled design relies on the ambient air and the shielding gas flow to dissipate heat, removing the risk of water leaks or pump failures associated with water-cooled torches. This reliability makes it ideal for field work and harsh shop environments where equipment needs to be tough and fail-safe.

15-Foot Reach & Tweco Connection

This assembly features a 15-foot (4.6 meter) cable, offering a perfect balance between reach and wire feedability. The cable is reinforced with a steel spring strain relief at both the gun and the feeder end, preventing kinking and protecting the internal copper stranding and gas hose. The backend connection is the industry-standard Tweco style, ensuring a solid electrical connection with minimal voltage drop. The connection pin is designed to seat firmly into the feeder adapter, preventing arcing at the drive rolls.

Optimized for Heavy Wire

The 10501133 SKU comes pre-configured for heavy wire applications, typically set up with a liner and tip for .052" to 1/16" (1.3mm - 1.6mm) wire diameters. This makes it immediately ready for flux-cored arc welding (FCAW) or heavy spray-transfer GMAW. The consumable system is designed to be robust; the slip-on nozzles and heavy-duty diffusers resist spatter adhesion and are easy to clean, ensuring consistent gas coverage and weld quality shift after shift.