16401104 - Tweco 64A-60 Conductor Tube, 60 Degree, 400 Amp (1640-1104)

Product Overview

The Tweco 1640-1104 (Model 64A-60) is a high-performance conductor tube designed specifically for the industry-standard Tweco No. 4 MIG gun series. As a critical component in the MIG welding assembly, this conductor tube—often referred to as a gooseneck or swan neck—serves as the conduit for both the welding wire and the shielding gas, bridging the gap between the gun handle and the consumables (diffuser, nozzle, and contact tip). This specific model features a 60-degree bend, which is the standard configuration for general-purpose fabrication, offering a balance between reach and ergonomic comfort for the operator.

Technical Specifications

Engineered for heavy-duty industrial applications, the 64A-60 is rated for 400 Amps, making it suitable for high-deposition welding processes. The tube is manufactured from a robust copper alloy, selected for its excellent thermal and electrical conductivity. This ensures that the welding current is transferred efficiently to the contact tip with minimal resistance heating. The outer surface is insulated to prevent accidental arcing if the neck contacts the workpiece. The precise internal dimensions are machined to facilitate smooth wire feeding, reducing the likelihood of bird-nesting or liner friction issues that can occur with inferior aftermarket replacements.

Compatibility and Installation

This conductor tube is a direct OEM replacement for the Tweco No. 4 Classic and related 400A MIG guns utilizing the 64 series conductor tubes. Installation is straightforward, requiring the loosening of the set screw or retention nut on the gun handle, removing the old tube, and seating the new 1640-1104 firmly in place. Proper installation is vital to ensure a gas-tight seal and a solid electrical connection. Maintenance personnel should verify that the liner is trimmed to the correct length relative to the new tube to prevent wire feed issues. This part is identified by the Tweco part number 1640-1104 and the model designation 64A-60.