16401318 - Tweco 64H-45 Conductor Tube for Spray Master MS450 (45 Degree)

Heavy-Duty Conductor Tube for Spray Master MS450

The Tweco 1640-1318, also known as the 64H-45, is the standard 45-degree conductor tube designed specifically for the Tweco Spray Master MS450 and V450 series MIG guns. As the backbone of the front-end assembly, this conductor tube is critical for transferring welding current to the contact tip and directing shielding gas to the weld pool. Its robust design is rated for 450 Amps, making it capable of handling high-heat spray transfer applications without overheating or structural failure.

Technical Construction

Manufactured from high-conductivity copper alloy, the 64H-45 ensures efficient current transfer with minimal resistance heating. The tube is encased in a durable, high-temperature insulating material that protects the operator and the gun from electrical shorts if it contacts the workpiece. The 45-degree bend radius is precision-formed to ensure smooth wire feeding, reducing drag on the liner and preventing bird-nesting issues often caused by inferior aftermarket necks.

Compatibility and Fitment

This conductor tube features the specific connection geometry required for the Spray Master handle assembly. It mates securely with the gun body, ensuring a gas-tight seal and solid electrical connection. It is compatible with standard Tweco consumables, including the 54A gas diffuser, 11-series contact tips, and 24-series nozzles. Replacing a damaged conductor tube is often the solution to persistent erratic arc issues or gas coverage problems caused by internal buildup or physical deformation of the neck.

• Model: 64H-45
• Angle: 45 Degrees
• Amperage Class: 450A
• Part Number: 1640-1318