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The Tweco Classic No. 4 MIG Gun (SKU: 1040-1905) is a premier air-cooled welding gun designed for high-amperage industrial applications. Rated at 400 Amps at a 60% duty cycle using CO2 gas, this gun is engineered to withstand the rigors of heavy fabrication environments. The 15-foot cable assembly provides ample reach for large weldments, while the robust cable construction resists abrasion, cuts, and heat damage, ensuring longevity in harsh shop conditions.
This model comes equipped with a standard Tweco backend connection, making it directly compatible with a vast array of wire feeders and power sources that utilize the Tweco style adapter. It is set up out of the box to run 0.035-inch to 0.045-inch solid or flux-cored wires, covering the most common range for structural and general manufacturing work. The gun utilizes the widely available Tweco 14 Series contact tips, 24 Series nozzles, and 54 Series gas diffusers, simplifying inventory management for consumables.
The Classic No. 4 features a fully field-repairable design. From the conductor tube to the trigger switch, components can be easily replaced, minimizing downtime and extending the total lifecycle of the tool. The metal-jacketed conductor tube is rotatable, allowing welders to adjust the neck angle for better access to difficult joints. The heavy-duty contact tip and nozzle arrangement ensures consistent electrical conductivity and shielding gas coverage, resulting in higher quality welds with less spatter.
Internal liner integrity is critical for smooth wire feeding, and the Tweco Classic No. 4 uses high-quality steel liners that reduce friction and prevent bird-nesting. The connection pin and strain relief systems are designed to maintain a secure electrical and mechanical connection, even when the cable is pulled or twisted during operation. This attention to detail makes the Classic No. 4 a dependable workhorse for any professional welder.
| Additional Information |
|---|
| Amperage:400 A |
| Cable Length:15 ft |
| Wire Size:0.035, 0.045 |
| Cooling Method:Air Cooled |
| Connection Type:Tweco |
| Series:Classic No. 4 |
| Duty Cycle:60 |
| Gas Type:CO2, Mixed Gas |
| Handle Style:Standard Oval |
