KP3992-364 - Lincoln Electric 3/64" Knurled Idler Roll for Wire Feeders

Reliable Feeding for Flux-Cored Welding

Every welder knows that a smooth arc starts with smooth wire feeding. If you are running 3/64" flux-cored or metal-cored wire, the Lincoln Electric KP3992-364 Idler Roll is the upgrade your machine needs to keep running without interruption. Slippage at the drive rolls is a common frustration that leads to burnback, stuttering arcs, and uneven weld beads. This idler roll solves that problem with its aggressive knurled texture, which bites into the wire just enough to push it through long gun cables and torch bends without crushing the hollow wire.

Why Choose Knurled?
Standard smooth rolls rely entirely on friction generated by clamping pressure. For tubular wires, too much pressure crushes the wire, causing it to drag in the liner. Too little pressure causes slipping. The knurled teeth on the KP3992-364 provide a gear-like grip, allowing you to back off the tensioner slightly while still maintaining positive feed. This extends the life of your liner and reduces wear on the feed motor.

Built for the Shop
This is a genuine Lincoln Electric part, meaning it is built to last in tough shop environments. The insulated design protects your equipment from internal electrical shorts, ensuring that your machine runs safely and reliably shift after shift. Whether you are fabricating heavy structural steel or performing maintenance repairs, swapping out worn idler rolls for fresh KP3992-364s is a quick, low-cost maintenance step that pays off in better weld quality and less downtime. Keep your production moving and your arc stable with the right drive parts for the job.