268847 - Miller XR Aluminum Drive Roll Kit .030-.035 Polished U-Groove

Miller 268847 XR Series Drive Roll Kit for Aluminum

The Miller 268847 is a specialized Drive Roll Kit designed for use with Miller XR Series wire feeders and push-pull guns. Engineered specifically for aluminum welding applications, this kit accommodates wire diameters of .030 inches (0.8 mm) and .035 inches (0.9 mm). The critical feature of this assembly is the polished U-groove design of the rolls. Aluminum wire is significantly softer than steel or stainless steel; standard V-groove or knurled rolls can deform the wire cross-section or shave off small metal particles during feeding.

These shavings can accumulate in the liner or contact tip, leading to increased friction, erratic feeding, and eventual burn-back. The Miller 268847 kit mitigates these issues by providing a smooth, polished surface that grips the wire firmly without marring its surface. This ensures consistent wire delivery speed, which is paramount for maintaining a stable arc in aluminum MIG welding. The kit typically includes the necessary drive rolls and associated guides to update or repair the feeding mechanism of compatible XR units.

Industrial professionals rely on genuine Miller OEM parts to maintain the duty cycle and reliability of their equipment. This kit is essential for fabrication shops, marine repair facilities, and manufacturing environments where aluminum welding is a primary process. Proper maintenance of the drive system, including the use of correct roll geometry, extends the life of the welding gun liner and consumables.