KP4694-45 - Lincoln Magnum PRO Curve HDE 350A Rotatable Gun Tube, 45 Degree

Technical Specifications: Lincoln KP4694-45 Replacement Gun Tube

The Lincoln Electric KP4694-45 is a replacement gun tube assembly designed exclusively for the Magnum PRO Curve HDE (Heavy Duty Ergonomic) MIG gun platform. This component is critical for maintaining the performance and duty cycle of your welding system. It is rated for 350 Amperes, making it suitable for high-deposition MIG and flux-cored welding processes commonly found in heavy fabrication and industrial manufacturing sectors. The tube features a standard 45-degree bend, which provides the optimal angle of attack for most fillet and groove weld configurations.

Key Technical Features:

• Amperage Rating: 350A (Mixed Gas/CO2)
• Geometry: 45-degree bend, 6.3-inch (160 mm) length
• Connection: Tool-less rotatable interface
• Compatibility: Magnum PRO Curve HDE series handles

The standout feature of this assembly is the tool-less rotation mechanism. The base of the tube is designed to seat securely into the HDE gun handle while allowing for 360-degree rotation. This is achieved without the need for hex keys or wrenches, allowing operators to adjust the neck orientation on the fly. This is particularly useful in complex assemblies where access is restricted. The 6.3-inch length is a standard medium reach, balancing the need for access with the necessity of keeping the wire feed path as straight as possible to minimize friction and liner wear.

Maintenance and Installation:
When replacing your gun tube, it is essential to inspect the seating surfaces and O-rings to ensure a gas-tight seal. A compromised seal at the gun tube junction can lead to shielding gas turbulence and porosity in the weld. The KP4694-45 is manufactured to precise tolerances to ensure perfect alignment with the Magnum PRO Curve HDE handle, ensuring efficient current transfer and gas laminar flow. This part does not include the diffuser, nozzle, or contact tip; these consumables must be transferred from the old tube or purchased separately. Ensure that the liner is trimmed to the correct length relative to the new tube to prevent wire feeding issues. Use only genuine Lincoln Electric parts to maintain the warranty and safety rating of your welding equipment.