Tapered roller bearings belong to separable bearings, with both the inner and outer rings having conical raceways. The inner ring and a set of conical rollers are enclosed by a basket shaped cage, forming an inner ring component. The outer ring can be separated from the inner ring component, and the outer and inner components can be interchangeable. The bearing is designed to adapt to combined loads, namely radial and axial loads acting simultaneously. The extension lines of the raceways intersect at the same point on the bearing axis to achieve true rolling, thus having low friction torque during operation. The axial load capacity of tapered roller bearings increases with the increase of contact angle. The size of the contact angle is related to the calculation coefficient, and the larger the value, the larger the contact angle.

The outer or inner ring of a double row tapered roller bearing is a whole, with two inner or outer rings having similar small end faces and a spacer in the middle. The clearance is adjusted by the thickness of the spacer and is commonly used in gearboxes, lifting equipment, rolling mills, etc.