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The XTRWELD 44-564-25 is a MIG wire conduit liner designed for use with Tweco-style MIG welding guns rated from 300A to 450A. The liner measures 5/64 inch in diameter and 15 feet in length, providing the internal wire-feed path between the drive roll assembly and the contact tip. It is manufactured to OEM-equivalent tolerances to maintain consistent wire feed speed and reduce friction-related feeding issues. Welders and fabricators install this liner during routine gun maintenance or when transitioning to a different wire diameter.
This liner is suited for professional MIG welding applications in fabrication shops, manufacturing facilities, and field welding environments. It is compatible with Tweco-style guns in the 300A to 450A range, covering a broad range of semi-automatic wire-feed setups. The 15-foot length matches standard MIG gun cable assemblies commonly used in shop and production settings. The part number is marked directly on the product for straightforward identification during inventory and installation.
Designed for use with Tweco-style MIG guns rated 300A to 450A, including Classic, Eliminator, Weldskill, Spray Master, PulseMaster, Smoke Master, and Velocity style guns. Brand names are referenced for fitment identification only.
MIG gun liner replacement is typically performed by a welder or welding equipment technician with the welding machine powered down and the wire feed unit disabled before service begins. Remove the existing liner from the gun neck end, insert the new liner from the rear of the gun cable, trim to the correct length per the gun manufacturer's specification, and reinstall the contact tip and nozzle. Avoid kinking the liner during installation, as bends in the conduit will cause wire feed resistance and erratic arc performance.
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