Double-row tapered roller bearings are available in TR2O (O-type) and TR2X (X-type) designs, with the O-type design offering higher rigidity. In double-row tapered roller bearings, the outer ring or inner ring is a single piece. The small end faces of the two inner rings or outer rings are positioned close to each other, with a spacer in between. The clearance is adjusted by varying the thickness of the spacer, which can also be used to adjust the preload of the bearing. These bearings can withstand heavy radial loads and axial loads in both directions while offering high rigidity. Double-row tapered roller bearings come in a variety of designs and types, such as TDI and TDO double-row tapered roller bearings, as well as matched single-row tapered roller bearings. 

Double-row tapered roller bearings can withstand heavy radial and axial loads. The axial load capacity of tapered roller bearings increases with an increase in the contact angle α, and the size of the contact angle is related to the calculation coefficient e: the larger the e value, the larger the contact angle. Separable and interchangeable components facilitate installation, disassembly, and maintenance. The rollers used in double-row tapered roller bearings are manufactured to extremely precise dimensional and geometric tolerances to ensure they are virtually identical. This optimizes load distribution, reduces noise and vibration, and allows for more precise preload setting. Double-row tapered roller bearings are commonly used in gearboxes, lifting equipment, rolling mills, and mining machinery, such as tunnel boring machines.