K3964-1 - Lincoln Electric Wire Feed Module for SAE and Classic HE Welders

Technical Overview of the Lincoln Electric K3964-1

The Lincoln Electric K3964-1 Wire Feed Module is a specialized output control device engineered to expand the capabilities of the SAE® and Classic® HE series engine-driven welders. Traditionally, these heavy-duty engine drives are optimized for Constant Current (CC) processes like Stick and TIG welding. However, for semi-automatic wire feeding processes such as MIG and Innershield® (Flux-Cored), a Constant Voltage (CV) output is preferred to maintain a consistent arc length and reduce spatter. This module bridges that gap, providing a stable CV output directly from your existing power source.

Installation of the K3964-1 integrates a control module assembly and a new control panel interface into the machine. Once installed, operators gain the flexibility to switch the welder's output between Constant Voltage and Constant Current modes. This dual-mode capability ensures that the machine retains its legendary Stick welding performance while becoming a formidable power source for high-productivity wire welding. The module is designed to compensate for voltage drops that commonly occur across long cable runs on large job sites, ensuring that the voltage set at the machine is delivered effectively to the arc.

The kit is comprehensive, including the control module, panel assembly with harness, necessary hardware, and updated machine nameplates. By enabling CV output, the module significantly enhances arc starting and stability for wire electrodes. This results in higher quality welds with less rework required for spatter removal. It is particularly effective when paired with robust wire feeders like the LN-25 Pipe or LN-25 Ironworker, allowing for a streamlined setup that does not require auxiliary control cables between the power source and the feeder.

Key Technical Benefits

For industrial maintenance and fabrication, the ability to adapt a single power source to multiple processes is invaluable. The K3964-1 ensures that your fleet of SAE-300 HE or Classic 300 HE machines can handle structural steel fabrication, pipeline repair, and heavy equipment maintenance using the most efficient process for the job. The module's design prioritizes durability and ease of use, maintaining the rugged reliability expected from Lincoln Electric equipment.