4403503406 - Fronius Style Combi Liner for 0.045 Aluminum Wire - 12.5ft

Precision Feeding for Aluminum Applications

The Fronius Combi Liner (SKU: 44,0350,3406) is a specialized replacement part designed to optimize the performance of your Fronius MIG welding system when working with aluminum. Specifically engineered for 0.045-inch (1.2mm) aluminum wire, this liner addresses the unique challenges associated with feeding soft filler metals. Unlike standard steel liners which can cause shaving or drag, this combi liner utilizes advanced materials to ensure a smooth, uninterrupted feed path.

Measuring 12.47 feet (approximately 3.8 meters) in length, this liner is perfectly sized for standard torch cable assemblies found on machines like the Mig 3201 and the Transteel series. The "Combi" designation refers to its hybrid construction: the main body is made from a low-friction polymer (often graphite or Teflon infused) that allows the soft aluminum wire to slide easily without buckling. The front end typically features a brass spiral section, which provides the necessary heat resistance and mechanical strength near the contact tip where temperatures are highest.

Proper liner maintenance is critical for aluminum welding. A worn or incorrect liner is the leading cause of "bird-nesting" at the drive rolls and erratic arc stability. By installing this genuine-spec Fronius liner, you ensure that your equipment operates at peak efficiency, delivering the consistent wire speed required for high-quality aluminum welds. It is an essential consumable for any fabrication shop utilizing Fronius Transteel or Mig 3201 equipment for aluminum fabrication.