The Lincoln Electric KP2743-1-75S is a premium consumable component designed for the rigorous demands of high-amperage industrial welding. Engineered specifically for the Magnum PRO series of semi-automatic welding guns, this nozzle is rated for 550A, making it an essential part for heavy fabrication environments where heat management and durability are paramount. The nozzle features a substantial 3/4 inch (19 mm) inner diameter (ID), which provides a broad umbrella of shielding gas coverage, essential for maintaining weld quality on thicker materials and during high-deposition transfer modes.
One of the defining technical characteristics of this nozzle is its 1/8 inch (3.2 mm) stickout configuration. This geometry positions the contact tip slightly protruding from the nozzle exit, which can be advantageous for visibility and specific arc lengths depending on the welding procedure specification (WPS). The unit utilizes a thread-on connection mechanism rather than a slip-on fit. This threaded design is critical for maintaining precise concentricity between the contact tip and the nozzle bore, ensuring uniform gas flow and preventing porosity caused by turbulence. Furthermore, the threads are coarse, a deliberate engineering choice to prevent the nozzle from seizing to the diffuser after repeated thermal expansion and contraction cycles.
Material composition is a key factor in the performance of the KP2743-1-75S. The nozzle is nickel-plated, a surface treatment that provides superior resistance to spatter adhesion compared to bare copper. This reduction in spatter buildup minimizes the frequency of nozzle cleaning, thereby increasing arc-on time and overall productivity. It is designed to work seamlessly with Magnum PRO 550A Contact Tips and Diffusers, forming a cohesive front-end system that dissipates heat effectively. This thermal management capability helps extend the lifespan of both the nozzle and the internal consumables, reducing long-term operational costs for industrial facilities.
Key Technical Specifications:
| Additional Information |
|---|
| packaging-description:1 Per Ea |
| ----- new values below ---- |
| Product Type:MIG Gas Nozzle |
| Amperage Rating:550 A |
| Bore Diameter:3/4 in (19 mm) |
| Stickout:1/8 in (3.2 mm) |
| Connection Type:Thread-on |
| Material Finish:Nickel Plated |
| Compatible Series:Magnum PRO 550A, Magnum PRO Curve HDE |
| Thread Type:Coarse |
| brand:Lincoln |
| packaging-description:1 Per Ea |
| item:n/a |
