Timken taper roller bearing cups are the outer race of a taper roller bearing set — the component that seats in the housing bore and provides the outer raceway surface for the tapered rollers. Every Timken cup is precision-ground from premium bearing steel with surface finishes measured in micro-inches, ensuring full contact across the roller length for maximum load distribution and service life.

The cup is always paired with a matching Timken cone (inner race assembly). Together, they form a taper roller bearing set capable of handling combined radial and thrust loads in a single compact unit. Timken’s proprietary steel chemistry and heat treatment process produces cups with exceptional hardness uniformity and dimensional stability, even under heavy loads and elevated temperatures.

This product includes 9 cup variants grouped by outside diameter. The matching cone number for each cup is listed in the specifications table. Always replace cups and cones as matched sets.

• Timken Premium Bearing Steel — proprietary chemistry for hardness, toughness, and fatigue resistance
• Precision Ground — races and rollers ground to micro-inch surface finishes
• Combined Load Capacity — handles radial and thrust loads simultaneously
• Dimensional Stability — heat treatment ensures consistent fit under load and temperature
• ABMA/ISO Standards — manufactured to industry dimensional and tolerance standards