75015229T - American Weldquip 15ft Liner 5/64-3/32 for 300-500A MIG Guns

OEM Precision for Heavy-Duty Wire Feeding

The American Weldquip 75015229T Liner Assembly is a critical replacement component engineered specifically for high-amperage American Weldquip MIG guns. Designed to service the 300A, 400A, and 500A torch series, this liner assembly provides the structural integrity and dimensional precision required for feeding large-diameter welding wires. Specifically calibrated for wire sizes ranging from 5/64 inch (approx. 2.0 mm) to 3/32 inch (approx. 2.4 mm), it ensures that the wire travels through the 15-foot cable assembly with minimal friction and maximum support. The liner acts as the conduit for the welding electrode, protecting it from the outer cable environment while maintaining a consistent electrical path and mechanical trajectory.

Constructed from high-tensile spring steel, the 75015229T offers superior resistance to compression and kinking, common issues in industrial environments where cables are frequently manipulated. The "Assembly" designation indicates that this product typically includes the necessary collet or stop mechanism at the back end to secure the liner within the power pin, as well as the correct tip-end preparation to seat against the gas diffuser. Proper liner fitment is essential for preventing "bird-nesting" at the feeder rolls and ensuring stable arc initiation. When using wires of this caliber—often employed in heavy structural fabrication, shipbuilding, or hardfacing—the internal surface finish of the liner is paramount to reduce drag coefficient.

This OEM part guarantees compatibility with American Weldquip's proprietary front-end and back-end configurations. Unlike generic universal liners, the 75015229T maintains the exact tolerance gap required for 5/64" and 3/32" wires. A gap that is too tight causes binding, while a gap that is too loose leads to erratic wire positioning at the contact tip, affecting current transfer and bead geometry. Regular inspection and replacement of the liner are recommended as part of a preventative maintenance schedule, particularly when changing wire spools or if increased feed motor resistance is observed. This product is supplied as a single unit, ready for immediate installation into 15-foot MIG gun cable assemblies.