K639-6 - Lincoln UNM Aluminum Suction Nozzle for Heavy Smoke Extraction

High-Efficiency Heavy Smoke Extraction

The Lincoln Electric K639-6 UNM Suction Nozzle is a specialized accessory engineered for the rigorous demands of heavy industrial welding. Designed primarily for use with the Lincoln X-Tractor 1GC Welding Fume Extractor, this nozzle addresses the challenge of capturing voluminous smoke plumes generated during high-amperage welding or flux-cored processes. The unit features a substantial 200 mm (8 in.) diameter opening, which creates a broad capture velocity profile, ensuring that contaminants are effectively drawn into the filtration system before they can disperse into the ambient facility air.

Constructed from high-grade aluminum, the nozzle is both lightweight and durable, capable of withstanding the thermal and mechanical stresses typical of a welding environment. A key technical feature of this assembly is its magnetic mounting stand. This allows for rapid, tool-free repositioning on any ferromagnetic surface, providing the operator with the flexibility to maintain the recommended capture distance of less than 100 mm (4 in.) from the arc. Proper positioning is critical for source capture efficiency, and the magnetic base facilitates this compliance without impeding the welder's workflow.

The kit is comprehensive, including the S20591-7 hose-to-tube adapter, which ensures a leak-free connection to standard 1-3/4 inch (45 mm) vacuum hoses. This secure interface minimizes pressure loss and maximizes the static pressure available at the hood face. For facility managers and safety officers, the K639-6 represents a targeted solution for improving air quality compliance in stations where heavy particulate generation is unavoidable.