8236-9220
Bearing Cup 6.375 in OD
Mack

This bearing cup, or race, provides the inner seating surface for a wheel hub or similar bearing assembly, with an outer diameter of 6.375 inches. It sets the required clearance and preload for the bearing system, guiding smooth rotation and consistent load distribution across the race. Manufactured to tight tolerances and finished to resist corrosion, the cup maintains alignment and minimizes micro‑movement that can lead to premature wear or noise. Proper installation ensures the bearing sits true and that seals can effectively keep lubrication in and contaminants out. Like all components in the hub area, this cup benefits from clean handling during replacement and careful verification of mating parts. For fitment confirmation, torque guidance, and service notes, refer to Source One Parts Center.