14201141 - Tweco WS42-4045-15 WeldSkill Liner 15ft for .040-.045 Wire

Smooth Feeding for Better Welds

If your MIG gun is sputtering, pulsing, or feeling like the wire is "chattering" as it comes out of the tip, there is a good chance your liner is dirty or kinked. The liner is the backbone of your wire feeding system, and when it goes bad, your welds suffer. The Tweco WeldSkill WS42-4045-15 is the genuine replacement liner for 15-foot Tweco WeldSkill guns running .040" to .045" wire. Don't let a cheap or worn-out liner frustrate you—swapping it out is one of the cheapest and most effective ways to restore your welder's performance.

This liner is built tough from wound steel, making it perfect for running standard mild steel MIG wire or flux-cored wire. It is designed to be flexible enough to maneuver around the shop but rigid enough to prevent the wire from bunching up inside the cable. The 15-foot length is standard for many medium-to-heavy-duty MIG setups. If your cable is slightly shorter, the liner is easily trimmed to size using a pair of side cutters. It features the correct back-end fitting to seat securely in your machine's power pin, ensuring the gas and wire enter the gun smoothly without leaks or snags.

Installation Tips:

• Lay your MIG gun cable out completely straight on the floor before removing the old liner.
• Remove the nozzle, contact tip, and gas diffuser from the front of the gun.
• Pull the old liner out from the back (machine end).
• Feed the new WS42-4045-15 liner in until it stops at the neck.
• Trim the excess liner at the back end according to your gun's manual (usually flush or sticking out slightly depending on the feeder type).
• Reassemble and you are ready to weld with a smooth, consistent arc.

Whether you are fabricating in a garage or working on a production line, keeping a spare WS42-4045-15 in your toolbox ensures you aren't shut down by a simple feeding issue. Trust Tweco quality to keep your wire moving and your beads looking great.