0700300690 - ESAB PTFE Aluminum MIG Liner 1.2-1.6mm (3.5m)

Optimized Wire Feeding for Aluminum Applications

The ESAB 1.2-1.6mm PTFE Liner (3.5m), part number 0700300690, is a specialized consumable designed to address the unique challenges of feeding soft welding wires. Unlike standard steel liners used for carbon steel wires, this liner is constructed from Polytetrafluoroethylene (PTFE), commonly known as Teflon. This material possesses an exceptionally low coefficient of friction, which is paramount when pushing soft alloys like aluminum or silicon bronze through a MIG torch cable.

When welding with aluminum, the wire lacks the column strength of steel. If it encounters resistance within the liner, it is prone to buckling at the drive rolls—a phenomenon frustratingly known as "bird-nesting." This ESAB PTFE liner minimizes that resistance, allowing the wire to glide smoothly from the feeder to the contact tip. This smooth delivery ensures a stable arc, consistent penetration, and reduces the downtime associated with clearing jams and resetting the wire feed system.

Technical Specifications and Compatibility

This specific liner is engineered to accommodate wire diameters between 1.2mm (0.045 inches) and 1.6mm (1/16 inches). This range covers the most common sizes for industrial aluminum welding. The liner is supplied at a length of 3.5 meters (approximately 11.5 feet). This length is ideal for standard 3-meter (10-foot) MIG guns, providing ample excess material that can be trimmed to the exact requirement of your specific torch setup during installation. Proper trimming is essential to prevent gaps between the liner and the contact tip or diffuser, which can cause erratic feeding.

As a genuine ESAB component, this liner is manufactured to strict tolerances, ensuring a precise fit within ESAB MIG guns and compatible Euro-connector style torches. Regular inspection and replacement of your liner are recommended as part of a preventative maintenance schedule. Over time, even PTFE liners can accumulate aluminum shavings or dust, which increases friction. Replacing your liner with this high-quality ESAB part restores your equipment to peak performance.