85Z16 - 1/8 Inch Collet for WP-12 TIG Torch

High-Performance 85Z16 Collet for WP-12 TIG Torches

The 85Z16 Collet is a specialized TIG welding consumable engineered specifically for the WP-12 series of water-cooled TIG torches. Designed to accurately accommodate 1/8-inch (3.2mm) tungsten electrodes, this collet plays a critical role in the electrical transfer and mechanical holding of the electrode within the torch head. Given the WP-12 torch's capacity for high-amperage applications—rated up to 500 amps—this collet is manufactured from high-grade copper alloy to ensure superior thermal and electrical conductivity, minimizing resistance and heat buildup at the contact points.

Precision machining ensures that the 85Z16 collet fits perfectly within the torch body, providing a concentric grip on the tungsten. This alignment is vital for maintaining a stable arc and preventing tungsten contamination or wandering during critical welds. The split-design allows the collet to compress securely around the electrode when the back cap is tightened, ensuring the tungsten remains fixed even under the thermal stress of 500-amp welding cycles. It is an essential component for professional fabricators utilizing the heavy-duty capabilities of the 12-series torch platform.

Regular inspection and replacement of collets are recommended to maintain optimal torch performance. Over time, thermal cycling can cause collets to twist or lose their spring tension, leading to poor arc starts or unstable current transfer. The 85Z16 is built to withstand the rigorous demands of industrial environments, offering durability and reliability for continuous welding operations. Whether working on thick aluminum sections or heavy-wall stainless pipe, this collet ensures your WP-12 torch delivers consistent power to the weld pool.