KP2019-4B1 - Lincoln Electric Alumina Gas Lens Cup No. 7 (7/16") for PTA-9/20 Torches

Product Overview

The Lincoln Electric KP2019-4B1 is a specialized Alumina Gas Lens Nozzle designed for precision Gas Tungsten Arc Welding (GTAW) applications. This consumable is engineered to function as an integral component of the torch front-end assembly, specifically mating with gas lens collet bodies. The nozzle features a No. 7 orifice, which corresponds to a 7/16-inch (approximately 11 mm) diameter, providing a balanced shielding gas envelope suitable for a wide range of joint configurations and material thicknesses.

Material and Construction

Manufactured from high-purity alumina ceramic, this nozzle exhibits exceptional thermal properties. Alumina is chosen for its high melting point and resistance to thermal shock, ensuring the nozzle maintains its structural integrity even during prolonged welding cycles at high amperages. The material is also non-conductive and resistant to the adhesion of weld spatter, although TIG welding typically produces minimal spatter. The pink coloration is standard for this grade of alumina ceramic in the welding industry.

Compatibility and Application

The KP2019-4B1 is part of the Lincoln Electric KP2019 series of nozzles. It is explicitly designed for compatibility with air-cooled PTA-9 and water-cooled PTA-20 and PTW-20 TIG torches. It also fits industry-standard WP-9 and WP-20 series torches that utilize gas lens configurations. The use of a gas lens nozzle in conjunction with a gas lens collet body significantly improves the flow characteristics of the shielding gas, converting turbulent flow into a laminar stream. This technical advantage allows for superior weld pool protection and the ability to extend the tungsten electrode further from the nozzle for improved joint access.

Specifications

This unit is sold individually (1 per each) or in specific pack quantities as designated by the suffix. The threaded base ensures a tight seal against the torch insulator, preventing gas leakage and atmospheric contamination of the weld zone. It is an essential consumable for fabricators requiring consistent, high-quality TIG welds.