Single row tapered roller bearings have an outer ring, and its inner ring and a group of tapered rollers consist of an inner ring assembly enclosed by a basket cage. The outer ring can be separated from the inner ring assembly. According to the ISO tapered roller bearing profile size standard, the outer ring or inner ring assembly of any standard tapered roller bearing should be able to achieve international interchange with the same type of outer ring or inner ring assembly. That is to say, the outer ring of the same type should meet the requirements of ISO492 (GB307) in addition to the external dimensions and tolerances, the cone angle of inner ring components and the cone diameter of components must also meet the requirements of interchange.

Usually, the conical angle of the outer raceway of single row tapered roller bearings can bear the combined action of axial load and radial load at the same time before the conical angle of the outer raceway is 10 ~19. The greater the cone angle, the greater the ability to bear axial load. Bearings with large taper angle, with rear code plus B, and taper angle between 25 ~29, can withstand large axial loads. In addition, the single row tapered roller bearings can adjust the clearance size during the installation process.

The outer ring (or inner ring) of double row tapered roller bearings is a whole. Two inner rings (or outer rings) have similar small end faces, with spacers in the middle. The clearance is adjusted by the thickness of spacers. The thickness of spacers can also be used to adjust the pre-interference of double row tapered roller bearings.

Four-row tapered roller bearings have the same performance as double-row tapered roller bearings, but they bear larger radial load and lower limit speed than double-row tapered roller bearings. They are mainly used in heavy machinery, such as rolling mills.

Multi-sealed double-row and four-row tapered roller bearings, ZWZ provides long life, multi-sealed double-row and four-row tapered roller bearings. New personalized design of bearings is carried out. The traditional design method of fully sealed bearings is changed. A new type of sealing structure combined with sealing and dust prevention is adopted to improve the sealing effect and seal performance. Compared with open structure bearings, multi-seal double-row and four-row tapered roller bearings have 20%-40% longer service life and 80% lower lubricant consumption.