16401403 - Tweco Spray Master Velocity 60-Degree Conductor Tube

Technical Overview of the Tweco 1640-1403 Conductor Tube

The Tweco 1640-1403 (Model SMVCTLS60LM) is a precision-engineered conductor tube designed specifically for the Spray Master Velocity series of MIG welding guns. As a critical component in the welding circuit, this conductor tube—often referred to as a gooseneck or swan neck—serves as the primary conduit for both the welding wire and the shielding gas as they exit the gun handle and approach the contact tip. It is manufactured from high-grade copper alloy, selected for its superior thermal and electrical conductivity, ensuring that current transfer to the contact tip remains efficient even during prolonged high-amperage welding cycles.

This specific model features a standard 60-degree bend radius. The geometry of the tube is critical for maintaining smooth wire feedability; a poorly designed or worn tube can introduce excessive friction, leading to wire chatter, burn-back, or erratic arc characteristics. Tweco's manufacturing process ensures a smooth internal bore that minimizes drag on the wire liner. Furthermore, the tube is encased in a durable, high-dielectric insulating jacket which protects the operator and the workpiece from unintended arcing, while also shielding the inner copper body from spatter adhesion and physical impact.

The 1640-1403 is designed for seamless integration with the Velocity consumable system. The threads and seating surfaces are machined to tight tolerances to prevent gas leakage, which is a common cause of porosity in welds. By maintaining a sealed and laminar gas flow path, this conductor tube helps ensure high-quality weld deposits. It is an essential replacement part for maintenance and repair operations (MRO) looking to extend the service life of their Tweco Spray Master equipment without compromising on performance standards.