092198 - Miller Teflon Liner for Aluminum Wire .030-3/64

Technical Overview of the Miller 092198 Teflon Liner

The Miller 092198 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 alloys (such as 4043 and 5356 series). Unlike standard steel coiled liners, which provide structural rigidity but high friction coefficients against soft metals, this Teflon liner offers an exceptionally smooth interior surface. This low coefficient of friction is critical for preventing the wire from dragging, shaving, or buckling—a phenomenon often referred to as "bird-nesting"—within the torch cable.

This specific liner is sized to accommodate wire diameters of .030 inches, .035 inches, and .047 inches (commonly referred to as 3/64 inches). The internal diameter is calibrated to support the wire column sufficiently to prevent buckling while allowing enough clearance for smooth travel. The liner measures 9.187 feet in length, making it suitable for specific Miller MIG gun assemblies or spool gun leads where a shorter, direct path is utilized. Proper installation of a Teflon liner is a prerequisite for successful gas metal arc welding (GMAW) of aluminum, ensuring consistent arc stability and wire feed speeds.

When utilizing this liner, operators must ensure that the liner is trimmed correctly and that no sharp burrs exist at the collet or diffuser end that could shave the soft aluminum wire. The use of this OEM Miller part guarantees dimensional accuracy and material quality consistent with Miller welding systems.