138255 - Miller .030-.035 Teflon Liner for Aluminum Wire - 14ft

Precision Aluminum Feeding with Miller Engineering

The Miller 138255 Teflon Liner is a critical component for industrial welders tasked with aluminum fabrication. Unlike standard steel liners used for mild steel wire, this specialized liner is manufactured from high-quality Teflon (PTFE). Aluminum wire is significantly softer and more pliable than steel; when pushed through a traditional coiled steel liner, it tends to shave against the metal coils, creating debris that clogs the gun and leads to erratic feeding. Furthermore, the friction inherent in steel liners often causes the soft aluminum wire to buckle, resulting in the frustrating "bird-nesting" phenomenon at the drive rolls.

This OEM Miller liner addresses these challenges head-on. Its smooth, low-friction interior surface allows .030" and .035" aluminum wires to glide effortlessly from the feeder to the contact tip. The 14-foot length is designed to fit specific Miller MIG gun configurations, ensuring a precise fit that maintains gas coverage and electrical conductivity parameters. By reducing drag, the liner minimizes the load on the wire feed motor, extending the lifespan of your equipment and ensuring consistent wire speed—a variable that is absolutely critical for high-quality aluminum MIG welding.

Professional fabricators understand that equipment reliability is paramount. Using genuine Miller parts like the 138255 ensures that your welding system operates within its engineered specifications. Whether you are welding thin-gauge aluminum sheet for automotive applications or performing intricate repairs, this Teflon liner provides the mechanical stability required for precision arcs. Installation is straightforward, fitting seamlessly into compatible Miller gun assemblies to restore factory-level performance.

Technical Specifications

• Material: Teflon (PTFE)
• Wire Compatibility: .030" - .035" (0.8mm - 0.9mm)
• Length: 14.000 ft
• Application: Aluminum MIG Welding