Tapered roller bearings have tapered rollers and tapered inner and outer ring raceways, so this bearing can accommodate the radial load and axial loads at the same time, i.e. combined load. The axial load carrying capacity of tapered roller bearings increases with increasing contact angel.
Tapered roller bearings are including single row, double row and four-row tapered roller bearing. Single row tapered roller bearing can accommodate the axial load or radial loads from one direction. When tapered roller bearing needing to accommodate the axial load, it need other one to accommodate the radial load from the opposite direction.