KP1941-1 - Lincoln Magnum 400 Gooseneck Assembly 82 Degree

Lincoln Electric KP1941-1 Gun Tube Assembly Overview

The Lincoln Electric KP1941-1 is a specialized Gun Tube Assembly engineered for the Magnum® 400 series of MIG welding guns. As a critical component in the welding circuit, this assembly—commonly referred to as a gooseneck—is responsible for guiding the welding wire and shielding gas to the contact tip while conducting the welding current. Rated for 400 amps, the KP1941-1 is built to withstand the high thermal loads associated with heavy industrial fabrication and structural welding. The 82-degree bend angle is a standard configuration that offers a balance between reach and operator comfort, allowing for effective manipulation of the torch in various welding positions.

Manufactured to Lincoln Electric's exacting standards, this gun tube ensures seamless compatibility with Magnum 400 handle assemblies and front-end consumables. Using genuine OEM parts is vital for maintaining the safety and efficiency of your welding equipment. A compromised gun tube can lead to issues such as erratic arc starts, poor gas coverage resulting in porosity, and increased resistance that generates excess heat. The KP1941-1 features robust insulation to protect the operator and the equipment from electrical faults, while the heavy-duty metal construction resists deformation from impacts common in workshop environments.

Technical Specifications and Compatibility

This assembly is specifically designed for air-cooled applications within the amperage range of the Magnum 400. The precise machining of the threads ensures a gas-tight seal at the diffuser connection, which is essential for maintaining laminar gas flow and protecting the weld pool. The internal dimensions are optimized to reduce friction on the wire liner, promoting smooth wire feeding even with softer wires like aluminum or flux-cored varieties. When replacing your gun tube, it is recommended to also inspect the liner and O-rings to ensure the entire wire delivery system is functioning at peak performance. The KP1941-1 is a direct replacement for the original equipment found on Magnum 400 guns, simplifying maintenance and repair procedures.