136683 - Miller Spoolmatic Teflon Barrel Liner .045-1/16 (3-Pack)

Technical Overview of Miller 136683 Teflon Liner

The Miller 136683 is a specialized Teflon liner designed for the barrel assembly of Miller Spoolmatic 15, Spoolmatic 30A, and XR/XR-M series push-pull guns. Engineered specifically for aluminum welding applications, this liner accommodates wire diameters ranging from .045 inches to 1/16 inches (1.2 mm to 1.6 mm). The liner features a precise length of 6.812 inches, ensuring a perfect fit within the gun's neck assembly to bridge the gap between the drive rolls and the contact tip.

Aluminum wire is inherently soft and susceptible to deformation and shaving when pushed through standard steel liners. This product utilizes high-grade Teflon (PTFE) material, which offers an extremely low coefficient of friction. This material property is critical for maintaining laminar wire flow and preventing "bird-nesting" at the drive rolls. By minimizing drag, the liner reduces the load on the spool gun motor and ensures consistent arc characteristics.

This package contains three (3) replacement liners, allowing for regular maintenance schedules in high-volume fabrication environments. Regular inspection and replacement of the barrel liner are recommended to prevent aluminum oxide buildup and mechanical wear from compromising weld quality. This is a genuine Miller Electric OEM part, ensuring dimensional accuracy and material compatibility with the specified welding systems.