The inner and outer rings of tapered roller bearings are both tapered raceways, and the rolling elements are also tapered, belonging to separable bearings. The main structural forms are divided according to the number of rolling rows: single row tapered roller bearings, double row tapered roller bearings, and four row tapered roller bearings.

According to the size of the contact angle, there are:

Small cone angle (9 ° ＜ a ≤ 25 °)

The distinction between large cone angles (>25 °).

The axial load-bearing capacity of tapered roller bearings depends on the contact angle a, which is the raceway angle of the outer ring. The larger the contact angle a, the greater the axial load-bearing capacity. The angle size is represented by the calculation coefficient e, and the larger the value of e, the greater the contact angle

Generally, it is not allowed for the shaft to tilt relative to the housing hole, and the maximum tilt should not exceed 2 inches. If it is necessary to use it as a rolling mill roller bearing due to production process requirements, it is inevitable that it will be subjected to bending force and the axis will tilt more than 2 inches. When the roller and raceway of the bearing will generate additional stress, which will increase the load on the bearing and shorten its service life. Therefore, DMD tapered roller bearings have a modified contact shape between the rollers and the raceway, especially for four row tapered roller bearings used in rolling mills. In addition to having a modified contact shape, the clearances of each row and the contact points between the inner ring and the roll neck are specially designed, which can effectively solve the problem of shortened bearing life caused by bending force. The TDI structure of double row tapered roller bearings (370000 series) has two outer rings, an integral inner ring, and a spacer in the middle of the outer ring. The clearance is adjusted by the thickness of the spacer, or the pre interference of the double row tapered roller bearings can be adjusted by the thickness of the spacer. Its performance is similar to the face-to-face installation performance of two single row tapered roller bearings. Compared with the outward facing double row tapered roller bearing TDO structure (350000 series), it has a smaller installation space, but slightly lower rigidity, and is less sensitive to non neutrality compared to other types.

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Deeply rooted in the field of automotive bearings, our core products include a full range of bearings and supporting repair kits such as automotive wheel hub bearings, tapered roller bearings, deep groove ball bearings, etc. We provide one-stop solutions to meet the needs of vehicle matching, after-sales maintenance, special vehicle customization and other scenarios.