K64A-60 - Tweco Style 400A MIG Gun Conductor Tube 60 Degree

Technical Specifications of the K64A-60 Conductor Tube

The Powerweld K64A-60 is a precision-engineered replacement gooseneck designed to meet the rigorous demands of industrial MIG welding. Modeled directly after the industry-standard Tweco® 64A-60, this component serves as the primary conduction path and structural backbone for 400-ampere air-cooled MIG guns. The unit features a fixed 60-degree bend, a geometry selected to optimize torch ergonomics and accessibility in standard fabrication setups. The conductor tube is manufactured from a high-purity copper alloy, ensuring minimal electrical resistance and efficient heat dissipation during high-duty cycle welding operations.

Compatibility is a key feature of the K64A-60. It is designed to interface seamlessly with the handle and cable assembly of Tweco No. 4 series guns, as well as compatible models from Powerweld and other aftermarket manufacturers. The connection points are machined to tight tolerances to ensure a secure mechanical fit and a leak-free gas seal. The tube is encased in a robust metal jacket and insulation system, providing necessary dielectric strength and physical protection against the harsh environment of the welding cell, including exposure to radiant heat, spatter, and impact.

Maintenance and replacement of the conductor tube are critical for maintaining arc stability. Over time, internal surfaces can become scored or clogged with liner debris, and the threads for the gas diffuser can wear. Installing the K64A-60 restores the gun's ability to feed wire smoothly and transfer current effectively to the contact tip. This component is rated for use with standard shielding gases including CO2 and Argon mixtures, supporting a wide range of welding processes from short-circuit to spray transfer modes.