57N49 - Weldcraft 57N49 5/32" Collet for WP-27 Series Torches (2-Pack)

Technical Overview of the Weldcraft 57N49 Collet

The Weldcraft 57N49 Collet is a critical consumable component engineered specifically for the WP-27 series of TIG welding torches, including the WP-27A and WP-27B models. These torches are typically utilized in heavy-duty industrial applications where high amperage and continuous duty cycles are required. The 57N49 collet is precision-machined to accommodate tungsten electrodes with a diameter of 5/32 inch (4.0mm), a size often selected for welding thick materials requiring substantial heat input.

Manufactured from a high-grade copper alloy, this collet is designed to withstand the intense thermal stresses associated with high-current TIG welding. Its primary function is to secure the tungsten electrode within the torch head, ensuring it remains centered and stable during the welding process. Furthermore, the collet serves as the primary contact point for electrical current transfer from the torch body to the electrode. The material composition and dimensional tolerances of the 57N49 are strictly controlled to maximize conductivity and minimize resistance heating, which can lead to premature failure of torch components.

Proper collet performance is essential for maintaining arc stability. A worn or ill-fitting collet can result in poor electrical contact, leading to arc wandering, unstable voltage, and potential damage to the collet body or torch head. The Weldcraft 57N49 features a split-design that compresses against the tungsten when the back cap is tightened, providing a firm mechanical grip. This pack contains two genuine Weldcraft collets, ensuring that operators have immediate replacements available to maintain production continuity in demanding fabrication environments.

Compatibility is strictly limited to the WP-27 series due to the unique physical dimensions required by these heavy-duty torches. Users should verify their torch model and tungsten diameter before installation. By utilizing genuine OEM parts like the 57N49, operators ensure that the gas flow dynamics and electrical characteristics of the torch remain within manufacturer specifications.