The Tweco 1440-1140 MIG Gun Liner is a critical replacement component designed to restore the performance of your MIG welding equipment. Manufactured by Tweco, a leader in arc welding products, this liner is engineered to guide welding wire from the wire feeder through the cable assembly to the contact tip with minimal friction and drag. This specific model is a 15-foot (4.5 meter) steel conduit liner intended for use with hard wires (solid steel) and flux-cored wires ranging from 0.035 inches (0.9mm) to 0.045 inches (1.2mm) in diameter.
One of the primary advantages of using the genuine Tweco 1440-1140 is its broad compatibility. It is the standard replacement liner for Tweco No. 3 (300 Amp) and No. 4 (400 Amp) MIG guns. Additionally, it serves as a direct OEM replacement for Lincoln Magnum 300 and 400 series guns, making it a versatile stock item for shops running mixed equipment fleets. The liner is constructed from high-grade, zinc-plated spring wire, which provides the necessary rigidity to prevent kinking while maintaining the flexibility required for maneuvering the gun during welding operations.
Proper liner maintenance is essential for weld quality. A worn or clogged liner is a leading cause of erratic wire feeding, bird-nesting at the drive rolls, and unstable arcs. Over time, copper dust from the welding wire and shop debris can accumulate inside the liner, increasing friction. Replacing your old liner with a fresh Tweco 1440-1140 ensures smooth wire delivery, which translates to consistent arc stability and better bead appearance. When installing, the liner is designed to be trimmed to the exact length of your specific gun assembly, ensuring a perfect fit at the gas diffuser and power pin.
Whether you are fabricating structural steel, performing automotive repairs, or working in heavy manufacturing, relying on authentic Tweco consumables like the 1440-1140 liner helps minimize downtime and maximize operator efficiency. Ensure your welding setup is performing at its peak by replacing worn liners at regular intervals.
| Additional Information |
|---|
| Length :15 ft |
| Wire Size:0.035/0.045 |
| Amps:300amp, 400amp |
| Fits Which Model:NA |
| Material:Steel |
| Compatible Brand/Model:Lincoln Magnum 300, Lincoln Magnum 400, Tweco #3, Tweco #4 |
| Part Number:1440-1140 |
| Wire Type:Flux Core, Solid Wire |
| ----- new values below ---- |
| Material:Steel |
| Compatible Brand/Model:Tweco #3, Tweco #4, Lincoln Magnum 300, Lincoln Magnum 400 |
| Part Number:1440-1140 |
| Wire Type:Solid Wire, Flux Core |
| Brand:Tweco OEM |
| Item:Liner |
| Length:15 ft |
| Wire Size:0.035/0.045 |
| Amps:300amp, 400amp |
| Fits Which Model:NA |
