0700200090 - ESAB Aluminum MIG Liner .023-.030 13ft PTFE

Technical Overview: ESAB Teflon Liner 0700200090

The ESAB 0700200090 is a specialized MIG gun liner manufactured from Polytetrafluoroethylene (PTFE), commonly known as Teflon. This component is engineered specifically to address the tribological challenges associated with feeding soft welding wires, particularly aluminum and silicon-bronze alloys. Unlike coiled steel liners, which present a rough internal surface and high coefficient of friction, this Teflon liner provides an exceptionally smooth bore. This reduction in friction is critical when pushing low-column-strength wires like 4043 or 5356 aluminum, which are prone to buckling (bird-nesting) when they encounter resistance within the cable assembly.

This specific liner is sized for small diameter wires ranging from .023 inches (0.6mm) to .030 inches (0.8mm). The internal diameter is calibrated to support the wire sufficiently to prevent columnar collapse while allowing enough clearance for smooth travel. The 13-foot (approx. 4-meter) length makes it suitable for standard MIG torches of equivalent or shorter lengths; it is designed to be trimmed to the exact requirement of the specific torch neck and power pin configuration. Proper installation requires a clean cut to ensure no burrs obstruct the wire path or gas flow.

In industrial environments, the use of a dedicated Teflon liner for aluminum applications is a standard operating procedure. Using a steel liner for aluminum can result in the shaving of the soft wire against the steel coils, leading to the accumulation of aluminum shavings that eventually clog the liner and the contact tip. Furthermore, the ESAB 0700200090 is chemically inert and resistant to high temperatures, although care must be taken at the neck end where heat is most intense. This part is a direct replacement for compatible ESAB MIG guns and ensures that the wire feed system operates within the manufacturer's specified parameters for arc stability and feed consistency.