Key elements of tapered roller bearings include the outer ring, inner ring, rollers, and a cage. These bearings have tapered inner and outer ring raceways between which tapered rollers are aligned.

The unique features of tapered roller bearings are their higher load ratings, adjustable mounted clearance, and the fact that the outer ring can be mounted separately from the inner ring assembly. 

Tapered roller bearings are used in automobiles, trucks, tractors, and various farm vehicles.