KP654-3/64A - Lincoln Electric Drive Roll Kit - 3/64" Aluminum for LN-7 Series

Stop Struggling with Aluminum Wire Feeding

If you have ever wrestled with a bird-nest of aluminum wire at the feeder, you know that having the right drive rolls is not optional—it is mandatory. The Lincoln Electric KP654-3/64A Drive Roll Kit is designed to make your life easier when welding aluminum with your LN-7 or LN-742 feeder. Aluminum wire is soft and prone to crushing; if you use standard knurled or V-groove rolls, you will flatten the wire, causing it to drag in the liner and burn back at the tip. This kit solves that problem with smooth U-groove rolls that grip the wire gently but firmly.

This kit is a complete solution in a box. It doesn't just give you the rolls; it gives you the guide tubes too. Why does that matter? Because guide tubes wear out and get clogged with aluminum shavings. Installing fresh guide tubes ensures the wire goes exactly where it needs to go—straight into the groove and out into the gun cable—without snagging. This means fewer interruptions, less downtime clearing jams, and more time actually welding.

Designed for 3/64" (1.2 mm) wire, this is one of the most common sizes for structural aluminum work. Whether you are fabricating trailers, repairing boat hulls, or working on general aluminum assembly, this kit restores your feeder's performance. Installation is straightforward: simply remove the old rolls and tubes, slide these in, and adjust your tension. Remember, with U-groove rolls, you need much less tension than with steel—just enough to feed without slipping. Upgrade your setup today and experience the difference smooth feeding makes to your weld bead profile.

Installation Tips

When installing the KP654-3/64A, ensure your drive roll tension is set correctly. Overtightening can deform the aluminum wire despite the U-groove. Set the tension so the rolls just barely slip if you block the wire at the gun tip (do this safely!). This prevents bird-nesting if a burn-back occurs.