BEARING DATA
Search Boundary Dimensions and Bearing Numbers

Why Tapered Roller Bearings Are Different

Tapered roller bearings are different from ball bearings because their rolling elements are conical rather than spherical. That shape allows the bearing to carry combined radial and axial loads at the same time. The inner ring is commonly called the cone, and the outer ring is called the cup.

How the Cone and Cup Work Together

The cone contains the inner race and tapered rollers, while the cup provides the outer raceway. When the bearing is loaded, the tapered geometry guides the rollers into the raceways and helps distribute force over a larger contact area. This is one reason tapered roller bearings are widely used where load direction changes during service.

Typical Applications

  • Automotive wheel hubs
  • Transmissions and gearboxes
  • Industrial reducers
  • Heavy equipment axles
  • Machine tool and rotating assemblies

Comparison With Related Bearing Types

Bearing Type Best Load Style Typical Strength Common Use
Tapered Roller Bearing Combined radial and axial load High load support and alignment stability Hubs, gearboxes, heavy machinery
Deep Groove Ball Bearing Mainly radial load Simple and versatile design Motors, general machinery
Cylindrical Roller Bearing High radial load Good radial capacity and stiffness Gearboxes, motors, machine tools

How to Use This Page

Start with the bearing number if it is visible. If the number is missing or damaged, measure the bore diameter, outside diameter, total width, cone width, and cup width to narrow down the correct bearing. That makes replacement work faster and reduces the chance of ordering the wrong part.

Reliability Note

The search tools on Engineer Data Hub are built around standard bearing dimensions used in workshop and catalog lookup work. This helps users compare actual measurements with commonly used bearing sizes in a practical way.