Tapered Roller Bearing: it belongs to the separable bearing. Single Row Tapered Roller Bearing can only bear a certain axial force of single direction, so you have to use 2 sets together. Compared to Single Row Tapered Roller Bearing, Double Row Tapered Roller Bearing can bear the mainly larger radial load and biaxial loading at the same time. It may limit axis or shell bidirectional axial displacement in the axial clearance. Four Row Tapered Roller Bearing may bear much larger radial load and biaxial loading.