KP2743-1-75R-B25 - Lincoln Magnum PRO 550A Thread-On MIG Nozzle, 3/4" Bore, 1/8" Recess (25-Pack)

Industrial Grade 550A MIG Nozzles

Maximize the efficiency of your welding operations with the Lincoln Electric KP2743-1-75R-B25 Magnum PRO Gas Nozzle. This heavy-duty consumable is specifically rated for 550A applications, making it the go-to choice for welders operating in the upper ranges of semi-automatic MIG welding. The nozzle is compatible with the Magnum PRO series of welding guns, known for their durability and performance. By utilizing genuine Lincoln Electric consumables, operators can ensure seamless compatibility and optimal performance of their welding equipment, reducing troubleshooting time and enhancing overall productivity.

Technical Specifications and Performance

The KP2743-1-75R features a large 3/4-inch (19 mm) bore, which is designed to provide a wide umbrella of shielding gas. This is particularly important when welding at high amperages where the weld pool is larger and more turbulent, requiring robust atmospheric protection to prevent porosity. The 1/8-inch (3.2 mm) recess provides a standard stick-out configuration that balances visibility with tip protection. By keeping the contact tip recessed, the nozzle acts as a shield against radiant heat and spatter, significantly extending the service life of the contact tip and diffuser assembly.

Superior Thermal Management

Heat buildup is the enemy of welding gun longevity. The Magnum PRO nozzle addresses this with a thread-on design that maximizes surface contact between the nozzle and the gun's front-end parts. This mechanical connection allows for superior heat transfer, effectively acting as a heat sink to dissipate thermal energy generated during the welding process. This design feature is crucial for 550A applications, preventing the nozzle from overheating and deforming, and ensuring that the gun runs cooler for longer periods.

Reliability for Critical Welds

In critical welding applications, consistency is key. The Lincoln KP2743-1-75R-B25 is manufactured to tight tolerances to ensure uniform gas flow and concentricity. A consistent gas flow pattern is essential for producing defect-free welds and reducing post-weld cleanup. The 25-pack configuration is designed for industrial users who require a steady supply of high-quality consumables. By standardizing on Magnum PRO nozzles, fabrication shops can achieve repeatable results and maintain high standards of quality control across all welding stations.