KP2521-1 - Lincoln Magnum 250LX Spool Gun Barrel Liner .025-3/64 (2-Pack)

Keep Your Spool Gun Running Smoothly

Every welder knows that a spool gun is the go-to tool for aluminum jobs, but even the best gun can cause headaches if the wire isn't feeding right. The Lincoln Electric KP2521-1 Barrel Liner is the direct replacement part you need to keep your Magnum 250LX Spool Gun firing on all cylinders. Designed to handle wire sizes from the thin .025 inch up to the standard 3/64 inch aluminum wire, this liner is the unsung hero that prevents birdnesting and stuttering at the tip.

When you are in the middle of a critical weld, the last thing you want is for the wire to drag or catch inside the barrel. A worn or dirty liner creates friction, which leads to erratic arc starts and burn-backs. Because spool guns push soft aluminum wire, a smooth path is absolutely vital. This OEM liner provides that low-friction conduit, ensuring the wire glides from the drive rolls to the contact tip without buckling. It is built to withstand the heat and wear of daily use, giving you the confidence to lay down stack-of-dimes beads without fighting your equipment.

This kit comes with two barrel liners, which is a smart move for any serious fabricator. Liners are consumables, just like contact tips and nozzles. Having a spare in your toolbox means you aren't stuck waiting on a delivery truck when you should be welding. If you have noticed your wire feed speed fluctuating or your arc sputtering despite good ground and settings, it might be time to swap out the liner. It is a cheap insurance policy for weld quality.

Don't settle for generic parts that might not fit the specific barrel length of the Magnum 250LX. These genuine Lincoln liners drop right in with zero modification. Whether you are fixing a boat hull, working on a trailer, or doing custom fabrication, fresh consumables make the job easier and the results cleaner. Swap out your old, kinked liner with a fresh KP2521-1 and feel the difference in your feed immediately.