K2166-3 - Lincoln Electric K2166-3 TIG Torch Adapter for PTA-9/17

Connect Your TIG Torch with the Lincoln K2166-3 Adapter

Maximize the versatility of your welding power source with the Lincoln Electric K2166-3 One-Cable Adapter. This specialized accessory is designed to bridge the gap between lightweight TIG torches and standard machine outputs. Specifically, it adapts the 3/8-inch fitting common on PTA-9 and PTA-17 one-cable torches to the larger 5/8-inch gas and power output stud found on many welders. This ensures that you can use your preferred air-cooled torch with a wide range of Lincoln Electric machines without compatibility issues.

The K2166-3 is engineered for "one-cable" systems, where the power cable carries both the electrical current and the shielding gas to the torch head. The adapter effectively routes the gas from the machine's solenoid or flowmeter through the connection while simultaneously conducting the welding current. It is rated for use with torches up to 150 amps, covering the full range of the PTA-9 (125A) and PTA-17 (150A) models. The solid brass construction offers superior conductivity, minimizing voltage drop across the connection and reducing heat buildup that could damage the cable or machine stud.

Installation is quick and secure, ensuring minimal downtime during torch changes. A secure connection is paramount in TIG welding to prevent atmospheric contamination of the weld pool due to gas leaks at the terminal. With the K2166-3, you get a factory-fit connection that guarantees optimal gas flow and arc stability. This part is a genuine Lincoln Electric accessory, ensuring it meets the strict quality standards required for professional welding applications. Keep your TIG setup running smoothly with the correct adapter for your air-cooled torch.

Features and Benefits

• Seamless Adaptation: Converts 3/8" torch fittings to 5/8" machine studs.
• High Conductivity: Brass construction ensures efficient power transfer.
• Gas Integrity: Precision machining prevents shielding gas leaks.
• Versatile Use: Ideal for both 125A and 150A air-cooled torch setups.