Single row tapered roller bearings allow you to adjust the clearance during installation 

A single row tapered roller bearing has an outer ring, and its inner ring and a set of tapered rollers form an internal assembly surrounded by a box cage. The outer ring may be separated from the inner assembly. According to the ISO standard for overall dimensions of tapered roller bearings, the outer ring or inner assembly of any standard size of tapered roller bearing must be internationally interchangeable with an outer ring or inner assembly of the same size. That is, for an outer ring of the same size, in addition to meeting the outer dimensions and tolerances of ISO 492 (GB 307), the cone angle of the inner assembly, the cone diameter of the assembly, etc. must also meet the relevant interchangeability requirements.

Generally, the cone angle of the raceway of the outer ring of a single row tapered roller bearing is 10° to 19°, and the bearing can simultaneously bear the combined action of axial and radial loads. The larger the cone angle, the higher the ability to absorb axial load. For bearings with a large cone angle, the suffix B is added to the designation; the cone angle ranges from 25° to 29°; such a bearing can withstand larger axial loads. In addition, single-row tapered roller bearings allow the clearance to be adjusted during installation.

Double-row tapered roller bearings have a one-piece outer ring (or inner ring). The small ends of the two inner rings (or outer rings) are located close to each other, with a spacer ring between them; The clearance can be adjusted by the thickness of the spacer ring, and the preload of the double row tapered roller bearing can be adjusted by the thickness of the spacer ring.

Four-row tapered roller bearings have basically the same characteristics as double-row tapered roller bearings, but compared to double-row tapered roller bearings, they accept a higher radial load, have a slightly lower maximum rotation speed, and are used mainly in heavy engineering, for example, in rolling mills, etc.

Multilabyrinth double row and four row tapered roller bearings: ZWZ supplies double row and four row tapered roller bearings with long service life and multilabyrinth seal. The bearings undergo customized completely new design, changing the traditional design method of fully sealed bearings, adopting a new type of sealing structure that combines sealing and dust protection, which improves the sealing effect and improves sealing performance. Compared to open design bearings, multilabyrinth double-row and quadruple-row tapered roller bearings have a 20-40% longer service life and an 80% reduction in lubricant consumption.