81Z86 - ESAB 5/32" TIG Collet Body for HW-17/18/26 Torches

ESAB 81Z86 Collet Body Overview

The ESAB 81Z86 Collet Body is a critical component designed for the front end of Heliarc and similar style TIG welding torches. Engineered to accommodate 5/32-inch (4.0 mm) tungsten electrodes, this collet body serves as the primary interface between the torch head and the collet, facilitating the transfer of welding current to the electrode while positioning it axially within the gas nozzle. It is manufactured to strict tolerances to ensure compatibility with industry-standard torch bodies, specifically the HW-17 (air-cooled), HW-18 (water-cooled), and HW-26 (air-cooled) series, as well as their WP equivalents.

Constructed from a high-grade copper alloy, the 81Z86 offers excellent thermal and electrical conductivity. This is particularly important when utilizing 5/32-inch electrodes, which are typically employed in high-amperage applications for welding thick sections of aluminum or steel. The material composition resists deformation under thermal stress, preventing thread seizing and ensuring a long service life. The internal geometry is machined to securely seat the collet, preventing electrode slippage and ensuring consistent arc starting and stability.

In addition to current transfer, the collet body plays a vital role in shielding gas distribution. The 81Z86 features precision-drilled gas ports that allow the shielding gas (typically Argon or Helium) to flow from the torch body into the ceramic cup, creating a laminar flow around the weld pool. Proper maintenance of the collet body is essential; a damaged or clogged unit can lead to turbulence in the gas stream, resulting in porosity or oxidation of the weld. This ESAB component is a direct replacement for the standard 10N29 part number found in many TIG consumable systems.

Industrial MRO professionals rely on genuine ESAB parts like the 81Z86 to maintain the reliability of their welding equipment. Whether used in manual fabrication or automated setups, this collet body ensures that the torch performs at its rated capacity. It is compatible with standard alumina nozzles and long or short back caps designed for the 17/18/26 series footprint.