The Lincoln Electric KP2742-1-50S is a high-performance gas nozzle engineered specifically for the Magnum PRO 350A series of semi-automatic welding guns. This component is a critical element of the Magnum PRO expendable system, designed to optimize gas shielding and thermal management at the front end of the torch. The nozzle features a 1/2-inch (12.7 mm) inner diameter (ID), which provides a balanced gas flow suitable for a wide range of standard welding joints and wire diameters ranging from .035" to 5/64". The 1/8-inch (3.2 mm) stickout configuration recesses the contact tip slightly, protecting it from immediate radiant heat while maintaining adequate electrical stickout (ESO) for stable arc characteristics.
Constructed with industrial-grade copper and finished with a durable nickel plating, this nozzle is built to withstand the harsh thermal cycles associated with 350A welding procedures. The nickel plating serves a dual purpose: it reflects radiant heat to keep the nozzle cooler during extended operation, and it significantly reduces the adhesion of weld spatter. This surface treatment ensures that spatter can be easily removed, reducing downtime associated with cleaning and maintenance. Unlike slip-on designs, the KP2742-1-50S utilizes a thread-on connection mechanism. This threaded interface guarantees concentricity between the nozzle and the contact tip, ensuring uniform gas coverage around the weld pool and preventing porosity caused by turbulent or off-center gas flow.
The engineering behind the Magnum PRO series emphasizes longevity and ease of use. The threads on this nozzle are coarse, a deliberate design choice to prevent the component from seizing to the diffuser after repeated heating and cooling cycles. This feature is essential for maintenance personnel and operators who require quick changeovers in high-throughput production environments. By maintaining a secure mechanical connection, the nozzle also assists in heat dissipation, drawing thermal energy away from the contact tip and diffuser to prolong the life of the entire front-end assembly.
| Additional Information |
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| Brand:Lincoln Electric |
| Item:Nozzle |
| Amperage:350 A |
| Packaging Description:1 per each |
| MIG Gun Model:Magnum® PRO 350A |
| Bore Size:1/2 inch (12.7 mm) |
| Stickout:1/8 inch (3.2 mm) |
| Connection Type:Thread-on |
| Material Finish:Nickel Plated |
| Compatible Diffuser:350A Thread-On Diffusers |
| Wire Size Range:.035 - 5/64" |
