KP2743-1-50R-B25 - Lincoln Magnum PRO 550A MIG Nozzle, 1/2 Inch Bore, 1/8 Inch Recess, 25-Pack

Lincoln Electric KP2743-1-50R-B25 Magnum PRO Nozzle (25 Pack)

The Lincoln Electric KP2743-1-50R-B25 Magnum PRO Nozzle is a premium welding consumable designed to meet the rigorous demands of heavy-industrial MIG welding applications. Engineered specifically for the Magnum PRO series of semi-automatic and robotic welding guns, this nozzle features a robust construction capable of withstanding amperages up to 550A. This high amperage rating makes it an essential component for fabrication shops, shipyards, and manufacturing facilities where high-deposition welding is routine. The nozzle is manufactured from high-grade copper alloy, ensuring excellent thermal conductivity and resistance to heat buildup, which significantly extends the service life of the consumable compared to standard nozzles.

One of the defining characteristics of this nozzle is its 1/2-inch (12.7 mm) inner diameter (ID). This bore size is optimized to provide a focused yet adequate shield gas envelope, ensuring porosity-free welds in standard joint configurations. The 1/8-inch (3.2 mm) recess is a critical design feature that positions the contact tip slightly back inside the nozzle. This recess serves multiple purposes: it protects the contact tip from excessive spatter accumulation, reduces the risk of the tip shorting out against the workpiece during tight maneuvering, and helps maintain a consistent electrical stick-out. This configuration is particularly beneficial in spray transfer modes or when welding at higher currents where spatter control and arc stability are paramount.

The "B25" in the part number indicates that this product is supplied as a bulk package containing 25 individual nozzles. This packaging configuration is specifically tailored for high-volume industrial environments, reducing procurement frequency and ensuring that welding operators always have immediate access to replacement parts. The Magnum PRO front-end expendables are designed with a secure seating mechanism that prevents gas leakage and ensures concentricity with the contact tip and diffuser. This precise alignment is crucial for maintaining a stable arc and consistent weld bead profile. By utilizing genuine Lincoln Electric consumables, operators can maximize the performance of their Magnum PRO welding systems, reducing downtime associated with frequent nozzle changes and cleaning.

In summary, the KP2743-1-50R-B25 offers a combination of durability, precision, and value. Its 550A rating supports heavy-duty cycles, while the specific 1/2" ID and 1/8" recess dimensions cater to a wide range of welding procedures. For maintenance, repair, and operations (MRO) managers, the 25-count bulk pack represents a cost-effective solution for maintaining inventory levels of critical welding consumables.