The Lincoln Electric KP2743-1-75S-B25 is a high-performance gas nozzle designed specifically for the Magnum PRO series of semi-automatic welding guns. Engineered to handle rigorous industrial environments, this nozzle is rated for 550 amps, making it an ideal choice for heavy fabrication and structural welding where high heat and long arc-on times are common. This specific model features a 1/8 inch (3.2 mm) stickout, meaning the contact tip protrudes slightly beyond the nozzle edge, which can assist welders in maintaining proper contact tip-to-work distance (CTWD) in specific joint configurations and improving visibility of the weld puddle.
With a large 3/4 inch (19 mm) inner diameter (ID), this nozzle provides a broad umbrella of shielding gas. This is particularly critical when welding at higher amperages (550A) where the weld pool is larger and more turbulent, requiring robust atmospheric protection to prevent porosity. The thread-on design is a hallmark of the Magnum PRO expendables system, ensuring that the nozzle remains securely seated during operation, maintaining concentricity with the contact tip and diffuser for consistent gas flow.
Supplied in a bulk package of 25 units, the KP2743-1-75S-B25 is tailored for high-volume shops looking to minimize inventory downtime. The robust construction of these nozzles ensures they withstand the thermal shock of high-amperage welding while resisting spatter buildup, extending the life of the consumable and reducing replacement frequency. Whether you are welding mild steel, stainless, or aluminum, ensuring you have the correct nozzle geometry is essential for quality results.
| Additional Information |
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| Brand:Lincoln Electric |
| Packaging Description:25-per-ea |
| Amperage:550 |
| Product Type:Gas Nozzle |
| Compatible Series:Magnum PRO |
| Bore Diameter:3/4 in (19 mm) |
| Tip Relationship:1/8 in (3.2 mm) Stickout |
| Connection Type:Thread-on |
| Amperage Rating:550A |
