Tapered roller bearing

Tapered roller bearings are separable bearings with tapered raceways on both the inner and outer rings. These bearings are classified into different structural forms such as single-row, double-row, and four-row tapered roller bearings according to the number of rows of rollers installed. Single-row tapered roller bearings can withstand radial loads and axial loads in one direction. When the bearing is subjected to radial loads, an axial component force will be generated, so another bearing capable of withstanding axial forces in the opposite direction is required for balance. Four-row tapered roller bearings have basically the same performance as double-row tapered roller bearings, but they can withstand greater radial loads than double-row tapered roller bearings and have a slightly lower limit speed. They are mainly used in heavy machinery.

Tapered roller bearings are separable bearings, with both the inner and outer rings featuring tapered raceways. The inner ring and a set of tapered rollers are enclosed by a cage to form an inner ring assembly, and the outer ring can be separated from the inner ring assembly. These bearings are classified into different structural types, such as single-row, double-row, and four-row tapered roller bearings, depending on the number of rows of rollers installed. The outer ring of a tapered roller bearing is 100% interchangeable with the inner ring assembly.

Single-row tapered roller bearings can withstand radial loads and axial loads in a single direction. The axial load capacity depends on the contact angle, which is the angle of the outer ring raceway. The larger the angle, the greater the axial load capacity. When the bearing is subjected to radial loads, an axial component force will be generated, so another bearing that can withstand axial forces in the opposite direction is needed for balance. Compared with angular contact ball bearings, the load capacity is increased and the limit speed is reduced.

Double-row tapered roller bearings can withstand combined radial and axial loads, primarily radial loads, and can also withstand bidirectional axial loads. There is a spacer between the two inner rings of the bearing, and by changing the thickness of the spacer, the clearance can be adjusted, ensuring uniform load distribution. This type of bearing is suitable for medium and low-speed applications.

The outer ring (or inner ring) of a double-row bearing is a single unit. There is a spacer between the small end faces of two inner rings (or outer rings), and the clearance is adjusted by the thickness of the spacer. The pre-interference of double-row tapered roller bearings can also be adjusted by the thickness of the spacer.

The four-row tapered roller bearing is a specially designed angular contact bearing, featuring a multi-row roller arrangement that can simultaneously withstand high radial loads and partial axial loads. The inner diameter of this bearing is designed with a loose fit to the roll neck, facilitating easy installation and disassembly, but a spiral oil groove is required to avoid sliding creep. It is primarily used in four-high hot rolling mills, cold rolling mills for work rolls, and cogging machines, where its compactness allows for substitution of additional thrust bearing configurations.

Tapered roller bearings adopt an optimized three-crown design method. Through simulation of working conditions, the most suitable crown requirements are found, thereby reducing contact stress and improving the fatigue life of the bearing. Automotive tapered roller bearings adopt non-standard design and processing methods, providing optimal application solutions for automotive users. Over the years, they have been stably serving large and medium-sized automotive and accessory enterprises both domestically and internationally.

Product Features:

The bearing is a separable type, with the inner ring assembly capable of being installed separately from the conical outer ring (outer ring). The outer ring and inner assembly are 100% interchangeable and compatible for use. The clearance of double-row and four-row bearings has been preset at the factory according to user requirements, eliminating the need for user adjustment. It is particularly suitable for bearing high combined (radial and axial) loads, with a larger contact angle indicating greater applicability for axial load bearing.

Technical advantages:

The personalized and innovative design of the bearing, coupled with the optimized surface treatment of the contact surface between the roller and the raceway, facilitates the formation of a fluid dynamic pressure lubrication oil film, thereby enhancing operational reliability. The adoption of a novel sealing structure that integrates sealing and dust prevention improves the sealing effect and enhances sealing performance. Compared to open-structure bearings, multi-seal double-row and four-row tapered roller bearings exhibit a 20%-40% increase in lifespan and a 80% reduction in lubricant consumption;

Tapered roller bearings are widely used in industries such as metallurgy, pulp and paper, coal mining, cement, and industrial gearboxes.