Double row tapered roller bearing is a kind of common rolling bearing, which is characterized by high bearing capacity, high stiffness, high precision and high speed. It consists of two tapered rollers inside and outside, which contact with the raceway of the inner and outer ring, forming rolling friction, so as to realize the support and rotation of the bearing.

The characteristics of double row tapered roller bearings mainly have the following aspects:
- High bearing capacity: the number of double row tapered roller bearings is more; Therefore, it has high bearing capacity and can bear large radial and axial loads.
- High stiffness: double row tapered roller bearings have the same inner and outer ring raceway Angle, so they have high stiffness and can withstand greater bending and torsional forces.
- High precision: The inner and outer ring raceways of double row tapered roller bearings are precision machined, and there are more contact points between the rollers and raceways, so it has higher precision and can meet the requirements of high-precision machine tools and precision instruments.
- High speed: The rolling friction between the roller and the raceway of the double row tapered roller bearing is small, so it has a high speed and can meet the requirements of high-speed rotation.
Double row tapered roller bearings have a wide range of applications, mainly used in heavy machinery, metallurgical equipment, mining machinery, petroleum machinery, aerospace equipment, automotive hub and other fields. With the development of industrial automation and intelligence, the application prospect of double row tapered roller bearings is more and more broad.
Under the center extension, the application of double row tapered roller bearing is also expanding. For example, in high-speed trains, wind turbines, robots and other fields, double row tapered roller bearings are more and more widely used. In high-speed trains, double tapered roller bearings can withstand high-speed rotation and large radial load to ensure the safety and stability of trains. In wind turbines, double row tapered roller bearings can bear large radial and axial loads to ensure the efficient operation of wind turbines; In the robot, the double row tapered roller bearing can withstand high speed rotation and large load to ensure the accuracy and stability of the robot.
Double row tapered roller bearing has the advantages of high bearing capacity, high stiffness, high precision and high speed. It has a wide range of applications. With the development of industrial automation and intelligence, its application prospect is more and more broad.