247351 - Miller Spoolmate 200 Replacement Liner Kit with Guide Pin

Genuine Miller 247351 Replacement Liner for Spoolmate 200

The Miller 247351 Liner Kit is the factory-specified replacement assembly for the Spoolmate 200 spool gun. Spool guns are intricate mechanical devices that rely on low-friction pathways to deliver wire effectively to the weld pool. This is particularly true for the Spoolmate 200, a favorite among fabricators for its reliability with aluminum wire. The 247351 kit addresses the most common wear point in the system: the liner conduit. As wire travels through the gun, it deposits microscopic amounts of debris and creates friction grooves. Eventually, this resistance exceeds the drive rolls' ability to push the wire, causing slipping or burnback.

This kit distinguishes itself by including the Guide Pin, a small but indispensable component that aligns the wire as it leaves the feed mechanism. A worn or missing guide pin can cause the wire to scrape against the inlet of the liner, generating aluminum shavings that rapidly clog the new liner. Miller provides both parts in this kit to ensure a complete repair of the wire feed path. The liner material is selected to minimize drag, allowing for smooth wire delivery even when the gun cable is manipulated into difficult positions during welding.

Technical Benefits and Maintenance

Regularly inspecting and replacing your liner is a best practice for any MIG welding setup. For aluminum applications, where the wire column strength is low, a pristine liner is non-negotiable. Symptoms indicating the need for this kit include:

• Inconsistent arc length due to surging wire speed.
• Wire burnback into the contact tip.
• Visible kinking or bird-nesting at the drive rolls.
• Excessive drive roll tension required to feed wire.

The Miller 247351 is manufactured to tight tolerances, ensuring it fits perfectly within the Spoolmate 200 housing without modification. It supports the standard wire diameters typically used with this gun. When installing, ensure the gun cable is laid out straight to facilitate the removal of the old liner and insertion of the new one. This OEM part guarantees that your Miller warranty and performance standards remain intact, providing professional welders with the reliability they demand for critical projects.