57N75XL - Generic 57N75XL #6 Extra Long Alumina Gas Lens Cup

Technical Overview of the 57N75XL Alumina Nozzle

The Generic 57N75XL is a specialized TIG welding consumable designed to extend the operational range of standard air-cooled and water-cooled torches. Manufactured from high-purity alumina ceramic, this nozzle is engineered to withstand the intense thermal cycling inherent in Gas Tungsten Arc Welding (GTAW). The "XL" designation indicates an extended length profile, which is critical for applications requiring the tungsten electrode to reach into deep recesses, narrow grooves, or complex geometries without compromising the shielding gas envelope.

This nozzle features a #6 orifice, corresponding to a 3/8-inch (9.5mm) inner diameter. It is specifically designed to interface with Large Diameter Gas Lens Collet Bodies (such as the 45V series). The use of a gas lens system creates a laminar gas flow, which is essential when using extended nozzle lengths; it prevents turbulence that would otherwise aspirate atmospheric contaminants into the weld pool. The alumina material offers excellent dielectric strength and resistance to spatter adhesion, ensuring a long service life even in demanding industrial environments.

Compatibility is broad, covering the industry-standard 17, 18, and 26 series TIG torches. This includes the WP-17, WP-18, and WP-26 models, as well as their various flex-head and valve-equipped iterations. By utilizing the 57N75XL, operators can maintain the necessary stick-out length for visibility and access while ensuring the shielding gas column remains coherent and effective.

Material Specifications and Performance

Alumina (Aluminum Oxide) is the standard material for TIG nozzles due to its balance of cost, durability, and thermal properties. It resists thermal shock, meaning it is less likely to crack when cooling rapidly from welding temperatures. The 57N75XL is precision-molded to ensure consistent threading and concentricity with the collet body, which is vital for maintaining a centered tungsten and a uniform gas shield.