0700300820 - ESAB Steel MIG Liner Red 1.0-1.2mm x 4M for PSF Torches

Technical Overview of ESAB Red Steel Liner

The ESAB 0700300820 is a precision-engineered steel liner designed specifically for the transport of hard wires in MIG/MAG welding applications. Identified by its industry-standard red color coding, this liner is calibrated for wire diameters ranging from 1.0mm to 1.2mm (0.040" to 0.045"). The liner features a spiral-wound steel construction that provides the necessary rigidity to prevent kinking while maintaining enough flexibility to navigate the curvature of the torch cable assembly without compromising wire feed speed.

With a total length of 4 meters, this liner is suitable for use in standard 3-meter and 4-meter MIG guns, including the popular ESAB PSF series (PSF 250, 305, 405, and 505). The excess length allows for precise trimming during installation to ensure perfect seating against the gas diffuser and the wire feeder drive rolls, which is critical for preventing gas leaks and ensuring consistent electrical conductivity. The internal surface finish is optimized to minimize friction coefficients, thereby reducing the load on the wire feed motor and mitigating issues such as stick-slip or wire chatter.

Regular replacement of the liner is a critical maintenance procedure in industrial welding environments. Over time, metal shavings, drawing lubricants, and environmental dust accumulate inside the liner, increasing drag. This ESAB replacement part restores the gun to factory specifications, ensuring that the welding parameters set at the power source are accurately translated to the arc.