KP2743-1-75R - Lincoln Magnum PRO 550A MIG Nozzle, 3/4 Inch Bore, 1/8 Inch Recess

Magnum PRO 550A High-Performance Nozzle

Optimize your welding operations with the Lincoln Electric KP2743-1-75R, a high-capacity gas nozzle tailored for the Magnum PRO 550A MIG gun platform. This consumable is designed to handle the intense heat and duty cycles associated with 550A welding applications. It features a standard thread-on interface that locks securely onto 550A diffusers, preventing the gas leakage or misalignment often seen with slip-on designs. The secure fit ensures that shielding gas is directed precisely over the weld puddle, minimizing porosity and rework.

The nozzle boasts a 3/4-inch (19 mm) bore, making it ideal for applications requiring high deposition rates and large weld beads. The wider opening facilitates better gas distribution and reduces the likelihood of the nozzle clogging quickly with spatter. Furthermore, the 1/8-inch (3.2 mm) recess places the contact tip safely inside the nozzle bore. This recess is advantageous for maintaining proper electrical stick-out and protecting the front-end consumables from physical damage during tight access welding. It also helps in keeping the front of the gun cooler by distancing the tip from the immediate arc zone.

Lincoln Electric has engineered this nozzle with maintenance and longevity in mind. The exterior is nickel-plated, providing a slick surface that spatter struggles to adhere to. This means welders spend less time scraping out their nozzles and more time welding. The specialized coarse threading is designed to withstand the thermal expansion and contraction of industrial welding, preventing the nozzle from becoming fused to the diffuser. Whether you are welding structural steel, heavy machinery, or pressure vessels, the KP2743-1-75R delivers the reliability and performance expected from the Magnum PRO series.