KP4335-040C - Lincoln .040 Cored Wire Drive Roll Kit

Precision Engineering for Flux-Cored Welding

Achieve superior arc stability and deposition rates with the Lincoln Electric KP4335-040C Drive Roll Kit, specifically engineered for .040 in (1.01 mm) cored welding wires. In MIG and Flux-Cored Arc Welding (FCAW), the drive roll system acts as the heart of the wire delivery process. If the rolls are mismatched to the wire size or type, operators experience feeding issues such as bird-nesting, wire shaving, and irregular wire speeds. This kit features a "V-Groove, Cored" profile, which typically incorporates a specialized geometry or knurling designed to bite into the softer shell of cored wires, providing positive drive force without flattening the wire's cross-section.

The integrity of flux-cored and metal-cored wires is paramount; if the wire is crushed by improper rolls, the flux density changes, and the wire may drag inside the liner or contact tip. The KP4335-040C addresses this by distributing pressure effectively around the wire circumference. This results in a smooth, uninterrupted feed that allows the power source to maintain a constant voltage and amperage relationship, which is critical for passing x-ray quality welds in structural and pipe applications. Lincoln Electric utilizes high-grade steel and precision machining to create drive rolls that maintain their geometry over thousands of pounds of wire throughput.

Installation is straightforward, allowing operators to switch between wire sizes and types rapidly. This kit is part of the KP4335 series, compatible with various heavy-duty Lincoln industrial feeders. For professional welders who demand consistency, using the correct drive roll size is non-negotiable. The .040" specification is common in thinner gauge structural work and automotive applications where cored wires are preferred for their penetration and travel speed. Ensure your equipment is calibrated for success with this genuine Lincoln Electric drive roll kit.

Technical Advantages

• Specific Geometry: The groove is strictly dimensioned for .040" (1.0 mm) tolerance to prevent wandering.
• Feed Consistency: Eliminates micro-stoppages that cause weld defects.
• System Protection: Proper traction reduces load on the drive motor and prevents liner clogging from shavings.