0459990076 - ESAB Polyamide MIG Liner 1.0-1.2mm 3.4m

Technical Overview of the ESAB PA-Liner

The ESAB PA-Liner (Part Number 0459990076) is a specialized conduit component designed for precision wire feeding in MIG welding applications. Engineered from Polyamide (PA), this liner is specifically formulated to handle soft welding wires, such as aluminum and stainless steel, where minimizing friction is critical to process stability. Unlike coiled steel liners, the smooth internal surface of the PA liner prevents the shaving of soft wire surfaces, which can otherwise lead to the accumulation of debris within the torch cable and subsequent feeding failures.

This specific liner features a length of 3.4 meters, making it suitable for use with standard 3-meter torch assemblies, allowing for appropriate trimming and fitting at the wire feeder end. It is calibrated to accommodate wire diameters ranging from 1.0mm to 1.2mm (0.040" to 0.045"), covering the most common sizes used in light to medium industrial fabrication. Proper installation of a polyamide liner is essential for maintaining a consistent arc and preventing "bird-nesting" at the drive rolls.

Professionals utilizing ESAB welding systems will find this genuine replacement part ensures compatibility and maintains the manufacturer's performance standards. The liner's thermal and mechanical properties are balanced to withstand the rigors of industrial environments while protecting the integrity of the filler metal as it travels from the spool to the contact tip.