10401908 - Tweco Classic 4 MIG Gun, 400A, 10ft Cable, Tweco Connection

Product Overview

The Tweco Classic No. 4 MIG Gun (Part Number 1040-1908) is a semi-automatic, air-cooled MIG welding gun designed for heavy-duty industrial applications. Renowned for its reliability and robust construction, the Classic No. 4 series has been a staple in the welding industry for decades. This specific model features a 10-foot (3-meter) cable assembly and a standard Tweco-style rear connection, making it compatible with a vast array of wire feeders and power sources that utilize the Tweco adapter system.

Technical Specifications

Engineered for high-performance welding, this gun is rated at 400 Amps at 60% duty cycle when using CO2 shielding gas, and 300 Amps at 60% duty cycle with mixed gases. It is capable of handling a wide range of wire diameters, typically set up for standard sizes but accommodating up to 5/64" (2.0mm) with the appropriate liner and contact tip changes. The gun utilizes the widely available 14 Series contact tips, 24 Series gas nozzles, and 54 Series gas diffusers, ensuring that maintenance and consumable replacement are cost-effective and convenient for procurement teams.

Construction and Durability

The Classic No. 4 is built to withstand harsh industrial environments. It features a heavy-duty metal-jacketed conductor tube (gooseneck) that resists impact and heat. The cable assembly is reinforced to prevent kinking and crushing, ensuring smooth wire feedability even in demanding conditions. The handle is designed with a simple, rugged trigger mechanism that is easy to service and replace if necessary. This unit is an excellent choice for fabrication shops, shipyards, and manufacturing facilities requiring a dependable 400A air-cooled solution.

Compatibility

The "TWE" designation in the part number indicates a direct connection for feeders equipped with Tweco receptacles. For machines with different connection styles (such as Miller or Lincoln direct), an adapter plug or kit may be required, though the Tweco style is one of the most common in the industry. This 10-foot version is particularly suited for bench welding or production cells where a shorter cable reduces clutter and improves wire feeding efficiency compared to longer 15-foot or 25-foot options.