9SS21002 - Lincoln Magnum PRO Trigger and Housing Assembly S21002

Reliable Trigger Replacement for Lincoln Magnum Series

The Lincoln Electric S21002 Trigger and Housing Assembly is a critical replacement component designed to restore the performance of a wide array of Lincoln MIG welding guns. Engineered specifically for the industrial environment, this assembly is compatible with the Magnum® 200, 275, 300, and 400 series, as well as the extensive Magnum PRO line, including AL, Curve, and HDE models. In professional welding operations, the trigger assembly is often the most mechanically stressed part of the gun, subjected to constant cycling, heat, and potential impact. This replacement unit ensures that your equipment maintains the reliability required for high-throughput fabrication.

Constructed from high-grade, heat-resistant molded materials, the S21002 is built to withstand the thermal intensity of heavy-duty welding applications. The housing resists deformation from reflected heat and is durable enough to repel spatter, preventing the trigger mechanism from jamming or failing prematurely. The one-piece modular design simplifies the maintenance process, allowing maintenance personnel to swap out damaged triggers quickly without extensive downtime. This is particularly vital in manufacturing sectors where equipment availability directly impacts production schedules.

Compatibility is a key strength of this assembly. It fits an impressive range of torches, including the Magnum PRO Barrel HDE (250/350/450), Magnum PRO Curve HDE (250/350/450/550), and the Magnum PRO Dual Procedure series. By using genuine Lincoln Electric parts, operators ensure proper fitment and electrical continuity, avoiding the intermittent arc issues often associated with generic aftermarket switches. This assembly includes both the mechanical trigger switch and the protective housing, providing a complete solution for repairing damaged or worn-out gun handles.

Whether for general fabrication, structural steel, or heavy equipment manufacturing, maintaining your welding guns with OEM-quality parts like the S21002 ensures consistent arc starts and operator safety. This component is an essential stock item for any MRO crib supporting Lincoln Electric welding systems.