KP665-045C - Lincoln Electric Knurled Drive Roll Kit for .035-.045 Flux-Cored Wire

Genuine Lincoln Electric Replacement Drive Roll

Maintain the peak performance of your Lincoln Electric wire feeder with the KP665-045C Knurled Drive Roll Kit. This genuine OEM part is critical for operators running flux-cored welding wires. Flux-cored wire is structurally different from solid MIG wire; it consists of a metal sheath filled with flux powder. Because it is softer and more compressible, it requires a drive roll with teeth—or knurling—to grab the wire and push it through the liner without the high clamping pressure that would flatten it. This kit provides exactly that functionality, featuring a textured groove designed to bite gently into the wire surface for slip-free feeding.

The KP665-045C is a dual-groove or specific-fit roll designed for .035 inch and .045 inch (0.9 mm - 1.1 mm) cored wires. It is a direct replacement for the factory drive rolls found in several legacy and current Lincoln Electric machines. Specifically, it is compatible with the SP-Series (SP-100-I, SP-135T, SP-170T, SP-175T) as well as the retail-focused Weld-Pak 3200HD and Pro-Mig 135 units. Owners of these machines often switch between solid wire for indoor work and flux-cored wire for outdoor or windy conditions. Having this drive roll kit on hand is necessary for that transition, ensuring your machine is ready for any environment.

Symptoms of a worn or incorrect drive roll include wire stuttering, irregular arc length, and the wire stopping against the workpiece (stubbing). If you are experiencing these issues while running flux-cored wire, verify that you are using the KP665-045C and that the knurling has not become clogged or worn smooth. This component is built from hardened steel to resist wear, but like all moving parts in a welding system, it eventually requires replacement. Keeping a spare drive roll in your consumables kit prevents downtime and ensures you can complete your projects without equipment-related interruptions.

Using genuine Lincoln Electric parts guarantees that the tolerances of the drive roll match the motor shaft and wire guides of your welder. Aftermarket or "universal" rolls may not seat correctly, leading to alignment issues that scrape the wire or cause drag. This kit includes the drive roll necessary to get you back to welding with the reliability you expect from the Lincoln Electric brand. Optimize your setup for flux-cored welding and experience smoother wire delivery and better bead appearance. Always verify your machine's model number before purchasing to ensure this drive roll is the correct fit for your specific wire feed assembly.