57N49 - Weldcraft 57N49 Collet 5/32" (4.0mm) for WP-27 Series Torches (2-Pack)

High-Performance Collet for Heavy-Duty TIG Applications

The Weldcraft 57N49 Collet is a critical consumable component designed specifically for the WP-27 series of TIG welding torches, including the WP-27A and WP-27B models. Engineered to accommodate 5/32-inch (4.0mm) tungsten electrodes, this collet plays a pivotal role in the electrical and thermal dynamics of the welding process. In heavy-duty TIG welding, where the WP-27 torch is often utilized for its high amperage capacity (often rated up to 500 amps), the integrity of the collet is paramount. It serves as the primary interface for current transfer from the torch body to the electrode, requiring materials that can withstand significant thermal cycling without losing mechanical tension or conductivity.

Manufactured from a premium copper alloy, the 57N49 collet is built to resist the twisting and deformation that can occur under the intense heat of high-amperage welding. A compromised collet can lead to poor arc starts, wandering arcs, and overheating of the torch head due to increased electrical resistance. By maintaining a precise fit around the tungsten, this Weldcraft component ensures consistent current flow and efficient heat dissipation, thereby extending the lifespan of both the electrode and the torch components. The split-design allows the collet body to compress the collet against the tungsten when the back cap is tightened, securing the electrode firmly in place for precision work.

This product is supplied in a pack of two, recognizing the consumable nature of the item and the importance of having immediate replacements available in an industrial setting. Whether used in automated welding systems or manual heavy fabrication, the 57N49 provides the reliability required for critical welds on thick materials such as aluminum and stainless steel. It is fully compatible with standard 27-series setups and integrates seamlessly with corresponding collet bodies and gas lenses.