42V73 - ESAB 42V73 Nylon Conduit Liner for 3/32 Aluminum Wire (11ft)

Technical Overview of the ESAB 42V73 Nylon Liner

The ESAB 42V73 is a specialized conduit liner designed to facilitate the feeding of large-diameter soft welding wires, specifically 3/32-inch aluminum. Unlike steel wound liners which can score or shave soft alloys, this liner is manufactured from high-grade nylon. The low-friction coefficient of the nylon material is critical for maintaining consistent wire feed speeds and preventing mechanical binding within the torch cable.

This specific unit measures 11 feet in length, making it suitable for standard cable assemblies associated with the ST-21M series MIG guns. The liner acts as the central guide channel for the welding wire, protecting it from the outer cable elements while ensuring it travels smoothly from the wire feeder to the contact tip. Proper installation of a nylon liner is essential for industrial aluminum welding applications where feedability is often the primary challenge.

Engineered to OEM specifications, the 42V73 ensures a precise fit within the compatible torch body. It is rigid enough to prevent collapsing under normal bending of the cable, yet flexible enough to allow for operator maneuverability. Regular replacement of the liner is recommended to maintain optimal welding parameters, as worn liners can lead to erratic arc characteristics and increased downtime.