84Z35 - ESAB 0.040" TIG Collet for HW-9/HW-20 Torches (2-Pack)

Precision TIG Consumables for HW-9 and HW-20 Torches

The ESAB 84Z35 Collet is a critical component designed for precision TIG welding applications. Engineered to fit the HW-9 (air-cooled) and HW-20 (water-cooled) series torches, as well as industry-standard WP-9 and WP-20 models, this collet is sized specifically for 0.040-inch (1.0mm) tungsten electrodes. In the realm of Gas Tungsten Arc Welding (GTAW), the collet serves a dual purpose: it mechanically secures the electrode in place and acts as the primary electrical contact point, transferring welding current from the torch body to the tungsten. Because of this role, the dimensional accuracy and material quality of the collet are paramount to achieving a consistent and stable arc.

Manufactured from high-grade copper alloy, the 84Z35 collet offers superior thermal and electrical conductivity. This ensures that the welding current is delivered efficiently to the electrode without excessive resistance heating, which can deform inferior collets and lead to arc instability. The 0.040-inch size is typically used for low-amperage welding on thin gauge materials, such as sheet metal, stainless steel tubing, or delicate aluminum components. At these lower parameters, precision is key; a loose or poorly fitting collet can cause the tungsten to slip or flutter, ruining the weld puddle control necessary for fine work.

This product comes in a pack of two, providing welders with a spare for immediate replacement. Over time, collets endure significant thermal cycling, which can cause them to twist, distort, or lose their spring tension. A compromised collet may fail to grip the tungsten securely or may create poor electrical contact, resulting in arc wandering or difficulty starting the arc. Regular inspection and replacement of the collet are recommended maintenance procedures for any serious fabricator. By choosing genuine ESAB consumables like the 84Z35, operators ensure compatibility and performance consistency within their welding setup.

Whether utilized in aerospace applications, motorsports fabrication, or general light-duty repair, the reliability of the torch front-end parts dictates the quality of the final weld. This collet mates perfectly with standard collet bodies and gas lenses designed for the 9/20 series torches, completing the electrical circuit and ensuring the shielding gas flows unobstructed. It is an essential stock item for any welder utilizing 0.040" tungsten for fine detail work.