Tapered roller bearings comprise solid inner and outer rings with tapered raceways and tapered rollers in a window cage. Open bearings are not self-retaining. As a result, the inner ring with the rollers and the cage can be fitted separately from the outer ring. Metric and inch size bearings are available. Designs with a K in the designation have inch dimensions. For new designs, however, bearings in metric sizes should always be used in preference.

Radial and axial load capacity
Contact angle
Compensation of angular misalignments
Matched bearings
Integral tapered roller bearings
No setting of axial internal clearance required
Sealing
Lubrication
Operating temperature
Cages
Suffixes