322P254534 - ESAB Steel MIG Liner 1.2-1.6mm Non-Insulated

Technical Overview of ESAB 322P254534 Steel Liner

The ESAB 322P254534 is a specialized MIG gun liner designed for the transport of steel welding wires. This component is critical for maintaining the structural integrity of the wire as it travels from the wire feeder through the cable assembly to the contact tip. The liner is constructed from high-tensile steel wound in a spiral configuration, providing the necessary flexibility to navigate the torch cable while maintaining a rigid internal channel for the wire.

This specific model is designated as "Non-Insulated," meaning it lacks an external polymer jacket often found on other liners. This design is typically utilized in specific torch configurations where the liner is inserted into a pre-insulated channel or where electrical isolation is managed by other torch components. The "7W" designation refers to the specific conduit geometry or series compatibility within the ESAB/Tweco product ecosystem.

The liner is engineered to accommodate wire diameters ranging from 1.2mm (0.045 inches) to 1.6mm (1/16 inches). Using a liner properly matched to the wire diameter is essential; a liner that is too small will cause binding and feed motor strain, while a liner that is too large can lead to micro-arcing inside the liner and erratic wire positioning at the contact tip. This product is intended for use with solid or flux-cored steel wires and is not suitable for soft alloys like aluminum, which require polymer or Teflon liners to prevent shaving and friction.

Regular inspection and replacement of the liner are recommended as part of a preventative maintenance schedule. Accumulation of metal shavings, drawing lubricants, and shop dust inside the liner can increase friction coefficients, leading to unstable arcs and burn-back issues. The ESAB 322P254534 ensures factory-standard performance for compatible ESAB MIG guns.