KP3991-35 - Lincoln Magnum PRO AL Push-Pull Liner 35ft .035-1/16

Optimized Wire Feeding for Aluminum Applications

The Lincoln Electric KP3991-35 Magnum PRO AL Conduit Liner is a critical component designed to maintain the high-performance standards of your Magnum PRO AL Push-Pull MIG guns. Engineered specifically for the unique demands of aluminum welding, this 35-foot conduit assembly provides a reliable pathway for soft welding wires, ensuring consistent delivery from the feeder to the contact tip. In industrial environments where equipment reliability is paramount, using genuine Lincoln Electric replacement parts guarantees that your push-pull system operates within its specified parameters, reducing downtime associated with feed failures.

This liner is constructed from high-quality, low-friction materials that significantly reduce drag coefficient. This is essential when working with aluminum wires (such as 4043 or 5356 series), which are softer and more prone to buckling or shaving than steel wires. The KP3991-35 accommodates a wire diameter range of 0.035 inches to 1/16 inches (0.9mm to 1.6mm), making it versatile for various structural and fabrication applications. The 35-foot length is perfectly matched to the extended cable assemblies of the Magnum PRO AL series, allowing operators to work at significant distances from the power source without compromising wire feed stability.

Proper maintenance of the conduit liner is vital for weld quality. Over time, liners can accumulate aluminum shavings, dirt, and oxides, which increase friction and lead to erratic arcs or burn-backs. Replacing your liner with the KP3991-35 restores the gun's original feeding characteristics. The assembly is designed for straightforward installation, fitting securely into the gun and feeder connections to prevent gas leaks or wire misalignment. By investing in this specific conduit liner, facilities can ensure their aluminum welding operations remain efficient, producing high-quality welds with minimal interruption.

Whether utilized in trailer fabrication, boat building, or automotive manufacturing, the Lincoln Electric KP3991-35 stands as a testament to precision engineering. It supports the sophisticated mechanics of push-pull technology, bridging the gap between the wire drive and the arc with durability and smooth performance.