10301136 - Tweco Classic 3 MIG Gun, 300A, 15ft, Miller Plug (.035-.045)

Tweco Classic No. 3 MIG Gun - 300 Amp, 15 ft, Miller Connection

The Tweco Classic No. 3 MIG Gun (Part Number 10301136) is a heavy-duty, air-cooled welding torch designed for high-performance industrial applications. Rated at 300 Amps at 60% duty cycle, this gun is engineered to handle the rigors of production welding, structural steel fabrication, and heavy equipment repair. This specific configuration features a 15-foot cable assembly and a Miller-style backend connection, making it a direct replacement for OEM guns on many Millermatic and Miller wire feeder systems.

The Classic No. 3 is renowned for its durability and simplicity. It utilizes the widely available Tweco 14 Series contact tips, 24 Series gas nozzles, and 54 Series gas diffusers, ensuring that consumables are easy to source and cost-effective. The gun comes pre-configured with a liner and contact tip setup for .035" to .045" (0.9mm - 1.2mm) welding wire, covering the most common range for medium-to-heavy fabrication.

Technically, the gun features a rugged handle design that provides excellent grip and impact resistance. The cable assembly is reinforced to withstand abrasion and cuts, common in harsh workshop environments. The connection pin configuration is designed specifically for Miller power sources, ensuring reliable electrical conductivity and gas flow. Maintenance is straightforward, with a field-repairable design that allows technicians to replace liners, trigger switches, and cable components without specialized tooling.

Technical Specifications

• Process: MIG (GMAW) / Flux Cored (FCAW)
• Amperage Rating: 300 Amps (CO2) / 250 Amps (Mixed Gas)
• Duty Cycle: 60%
• Cooling: Air Cooled
• Wire Capacity: .035" - .045" (Standard Setup)
• Cable Length: 15 Feet (4.5m)
• Rear Connection: Miller Style