Tapered Roller Bearing

The tapered roller bearing belongs to the separated type bearing, and both the inner and outer rings of the bearing have tapered raceways. This type of bearing is divided into different structural types based on the number of rows of installed rollers, such as single row, double row, and four row tapered roller bearings. Single row tapered roller bearings can withstand radial loads and axial loads in a single direction. When the bearing is subjected to radial load, an axial force will be generated, so another bearing capable of withstanding opposite axial forces is needed for balance.

Conical roller bearings refer to radial thrust type rolling bearings with tapered rollers as the rolling element. There are two types: small cone angle and large cone angle. The small cone angle mainly bears radial and axial combined loads, which are mainly radial loads. It is often used in pairs and installed in reverse. The inner and outer race rings can be installed separately, and the radial and axial clearance can be adjusted during installation and use; The large cone angle mainly bears axial and radial combined loads, mainly axial loads, and is generally not used separately to bear pure axial loads. It can be used as a pair configuration (with the same end installed relative to each other) to bear pure radial loads.

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Tapered Roller Bearing


A single row tapered roller bearing has an outer ring, and its inner ring and a set of tapered rollers are enclosed by a basket shaped cage as an inner ring assembly. The outer ring can be separated from the inner ring component. According to the ISO tapered roller bearing outer dimension standard, any standard model of tapered roller bearing outer or inner ring component should be able to achieve international interchangeability with the same model of outer or inner ring component. The outer ring of the same model must comply with ISO492 (GB307) regulations for external dimensions and tolerances, and the cone angle and cone diameter of the inner ring components must also comply with relevant regulations for interchangeability.

Usually, the cone angle of the outer race of a single row tapered roller bearing is between 10 ° and 19 °, and it can withstand both axial and radial loads simultaneously. The larger the cone angle, the greater the ability to withstand axial loads. A bearing with a large cone angle, with a suffix B and a cone angle between 25 ° and 29 °, can withstand large axial loads. In addition, the clearance of single row tapered roller bearings can be adjusted during installation.

The outer ring (or inner ring) of a double row tapered roller bearing is a whole. The two inner (or outer) rings have similar small end faces and a spacer ring in the middle. The clearance is adjusted by the thickness of the spacer ring, or the pre interference of the double row tapered roller bearing can be adjusted by the thickness of the spacer ring.

Four row tapered roller bearings have the same performance as double row tapered roller bearings, but they bear greater radial loads and slightly lower limit speeds than double row tapered roller bearings. They are mainly used in heavy-duty machinery.

ZWZ provides long-life, multi sealed double and four row tapered roller bearings. Personalized and brand new design of bearings, changing the traditional design method of fully sealed bearings, adopting a new sealing structure combining sealing and dust prevention to improve sealing effectiveness and enhance sealing performance. Compared with open structure bearings, the lifespan of multi sealed double and four row tapered roller bearings is increased by 20% to 40%; Reduce lubricant consumption by 80%.


Conical roller bearings mainly bear radial and axial combined loads. The bearing capacity depends on the raceway angle of the outer ring, and the larger the angle, the greater the bearing capacity. This type of bearing belongs to the separated type, and is divided into single row, double row, and four row tapered roller bearings based on the number of rolling elements in the bearing. The clearance of single row tapered roller bearings needs to be adjusted by the user during installation; The clearance of double row and four row tapered roller bearings has been given according to user requirements at the time of product delivery and does not require user adjustment.

Conical roller bearings have tapered inner and outer raceways, with tapered rollers arranged between the two. The projection lines of all conical surfaces converge at the same point on the bearing axis. This design makes tapered roller bearings particularly suitable for bearing composite (radial and axial) loads. The axial load capacity of bearings is mostly determined by the contact angle α Determined; α The larger the angle, the higher the axial load capacity. The angle size is represented by the calculation coefficient e; The larger the e-value and the greater the contact angle, the greater the applicability of the bearing to withstand axial loads.

Conical roller bearings are usually of the separated type, that is, the conical inner ring assembly composed of inner rings with roller and cage components can be installed separately from the conical outer ring (outer ring).

Conical roller bearings are widely used in industries such as automobiles, rolling mills, mines, metallurgy, and plastic machinery.

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