Double row tapered roller bearings consist of a double outer ring and two single inner rings. They are often supplied as pre-set assemblies with a spacer ring between the inner rings. The double-row tapered roller bearing can carry heavy loads, including complex loads - radial and axial. These bearings can locate the shaft axially in both directions with a specified axial clearance or preload. This unit has a wide active bearing spacing and is selected for applications with high overturning torque.
Division of tapered roller bearings
Tapered roller bearings are divided in terms of the number of rows into single, double and multi-row. Additionally, they are available in two dimensions: inch and metric.
Systematics of markings for tapered roller bearings
Bearing designations in metric dimensions:
Series numerical designations: 302, 303, 313, 320, 322, 323, 329, 330...
Example designation of a tapered roller bearing in metric dimensions: 31305.A
Designations of bearings in inch dimensions:
Inch bearings include a letter designation of the load class: EL (extremely light), LL (less than light), L (light), LM (light-medium), M (medium), HM (medium-heavy), H (heavy), HH (more than heavy), EH (extremely heavy), T (axial only). Example marking of a tapered roller bearing in inch dimensions: HM 88547/1.
Application of tapered roller bearings
Single row tapered roller bearings are the basic and most common type of tapered roller bearing. It consists of two detachable basic parts: the inner assembly and the outer ring. A single row tapered roller bearing is usually a paired bearing, one of a pair of oppositely mounted identical tapered roller bearings. To optimize performance, single row tapered roller bearings are adjusted to the required clearance or preload during installation.
