Caterpillar 168-8451 Travel Motor Ball Bearing

The 168-8451 is a single-row angular contact ball bearing designed for the final drive gearbox (travel motor) of Caterpillar hydraulic excavators. Manufactured from GCR15 (100Cr6) high-carbon chromium bearing steel, it features a 35-degree contact angle optimized for combined radial and axial loads encountered in track propulsion systems. The bearing is non-aligning and separated (separable inner/outer ring) for installation in the planetary reduction assembly. This component supersedes Caterpillar OEM part numbers 296-6220, 096-6412, 0962639, and 966412. It serves as a critical wear item in the travel reduction gearbox, ensuring smooth rotation and load distribution for the undercarriage drive train. Compatible with 20-30 metric ton class excavators including the 311, 315, 318, 319, 320, 321, 322, and 323 series machines.