14501133 - Tweco 45H-332-15 MIG Gun Liner | 3/32" (2.4mm) | 15ft | 500-650A

Keep Your Heavy Wire Feeding Smooth

When you are running big wire, you need a liner that can handle the heat and the weight. The Tweco 45H-332-15 is the heavy-weight champion of MIG liners, designed specifically for pushing 3/32" (2.4mm) wire through a 15-foot cable. Any welder who has dealt with bird-nesting at the feeder or a stuttering arc at the workpiece knows that the liner is the veins of your welding setup. If the liner is clogged, kinked, or just worn out, your machine won't run right, no matter how perfect your settings are. This genuine Tweco OEM liner is built to restore that factory-fresh smooth glide to your wire feeding, letting you focus on the puddle rather than fighting the gun.

This isn't your standard light-duty spring. It is a steel-wound, zinc-plated conduit rated for 500 to 650 amps. That means it is designed to survive in the hottest, toughest environments—shipyards, structural steel beams, and heavy manufacturing floors. The zinc plating isn't just for looks; it acts as a lubricant to help the wire slide through with minimal friction, which extends the life of your drive rolls and reduces the strain on your wire feeder motor. Whether you are running solid steel wire or heavy flux-cored wire, the 45H-332-15 maintains its shape and rigidity, preventing the wire from wandering or buckling inside the cable.

Installation is straightforward, but precision matters. This 15-foot liner comes ready to install in standard Tweco #5, #6, and compatible high-amperage guns. Remember to lay your cable out straight before inserting the new liner, and follow your gun's manual for the correct stick-out length when trimming. A liner cut too short can cause gas leakage and micro-arcing inside the diffuser, while one cut too long can be crushed when you tighten the power pin. Don't settle for generic knock-offs that might have inconsistent winding or rough interiors. Stick with genuine Tweco parts to ensure your heavy-duty rig runs at peak performance, shift after shift.