A single-row Tapered roller bearing can support a combined radial and axial load. If either a radial load or bi-directional axial load is to be carried, a pair of bearings must be used in a "ff" "bktbk" ace-to- ace or ac -0- ac position. Tapered roller bearings are separable into the components: outer ring, inner ring and roller assembly.
The non- separable inner ring and roller assembly is called the "cone" , and the outer ring is called the "cup" .Internal clearance is established during mounting by the axial positioning of the cone relative to the cup.
This bearing type can be used in a preload situation to obtain higher rigidity and better running accuracy of the shaft. Double-row and four-row Tapered roller bearings are designed to carry radial, and bi-directional axial loads.