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 13 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