14N66 - ESAB HW-9 TIG Alumina Cup #5 (5/16") High Impact

Technical Overview of the ESAB 14N66 Alumina Cup

The ESAB 14N66 is a specialized TIG welding nozzle designed for use with the HW-9 series torches, as well as industry-standard WP-9 and WP-20 setups. This component functions as the primary shielding gas director, shaping the flow of argon or helium around the tungsten electrode and the weld pool. It is classified as a #5 cup, indicating an orifice diameter of 5/16 of an inch (approximately 8.0 mm). This size is optimal for low-to-medium amperage applications where precise gas coverage is required without excessive gas consumption.

Manufactured from high-impact alumina ceramic, this nozzle is engineered to withstand significant thermal cycling and mechanical stress. Unlike standard electrical-grade ceramics, high-impact alumina offers improved resistance to cracking when dropped or subjected to rapid heating and cooling cycles. The nozzle features standard threading compatible with standard collet bodies found in 9-series and 20-series torch heads. It is not designed for use with gas lens collet bodies, which typically require larger diameter threads (such as the 53N series).

The 14N66 is an essential consumable for maintaining weld quality. A damaged or clogged cup can lead to turbulent gas flow, resulting in porosity or oxidation of the weld bead. Regular inspection and replacement of the cup ensure laminar flow and optimal arc stability. This specific part number is associated with ESAB's Heliarc line but maintains cross-compatibility with similar air-cooled and water-cooled torch systems in the industry.