K418 - Lincoln Electric LN-7GMA Timer and Burnback Control Kit

Lincoln Electric K418: Precision Control for LN-7GMA Wire Feeders

Upgrade your welding setup with the Lincoln Electric K418 GMA Timer Kit, a dedicated performance module engineered specifically for the LN-7GMA wire feeder. This kit is the ultimate solution for fabricators looking to refine their Gas Metal Arc Welding (GMAW) process by introducing precise automated controls for gas flow and wire termination. By installing the K418, you transform a standard wire feeder into a more sophisticated unit capable of handling demanding welding specifications that require strict adherence to shielding gas protocols.

The K418 kit is built around three core functionalities: gas timing, burnback adjustment, and setup convenience. The gas timing features include both preflow and post-flow delays. Preflow is essential for establishing a stable arc environment, clearing away air that could cause weld defects immediately upon arc ignition. Post-flow continues the supply of shielding gas after the arc is extinguished, which is critical for cooling the weld pool and preventing crater cracking or oxidation. These timers are adjustable, allowing the operator to tailor the duration based on the material thickness and welding parameters.

Wire sticking is a frequent frustration in MIG welding, often leading to wasted time and damaged contact tips. The K418 solves this with its adjustable burnback control. This feature keeps the welding power active for a fraction of a second after the wire feed stops, burning the wire back to a perfect length. This ensures that the wire does not freeze in the solidifying weld metal and leaves the ideal stick-out for the next restart, improving overall efficiency and arc starting reliability.

Finally, the kit includes a Purge/Cold Inch switch, a vital tool for daily operation. This switch allows for the safe loading of wire (Cold Inch) without the risk of accidental arcing, and the clearing of gas lines (Purge) to ensure fresh gas is at the nozzle. Whether you are working in heavy fabrication or precision manufacturing, the Lincoln K418 GMA Timer Kit provides the control necessary to produce superior welds with your LN-7GMA equipment.