Angular Contact Ball Bearing Guide

What Is an Angular Contact Ball Bearing?

An angular contact ball bearing, can also be referred to as the angular contact bearing or angular bearing, is a type of rolling-element bearing with inner and outer ring raceways that are displaced complementary to each other in the direction of the bearing axis. The “ball” is utilized to keep the bearing races separated.

The purpose of an angular contact ball bearing is to support axial and radial loads, and reduce rotational friction. This is achieved by using at least two races mentioned above to contain the ball and transmit the load through the balls.

In most cases, one race is attached to the rotating a rotating hub or a shaft, while the other is stationary. As one of the bearing races rotates, the ball also rotates as a result. This mechanism is able to accommodate combined loads (i.e. simultaneously acting axial and radial loads).

Different Types of Angular Contact Ball Bearing

Angular contact ball bearings can be divided into two types: single and double row angular contact ball bearing.

● Single Row Angular Contact Ball Bearing:
This type of bearing can only bear axial load in one direction. When bearing radial load, additional axial force will be created, and this can only limit the axial displacement of the shaft or housing in a single direction. Single angular contact ball bearings have a contact angle of 40 degrees, so they are able to withstand large axial loads. Moreover, single angular contact ball bearings are non-separable design, and the shoulders on both sides of the inner and outer rings have different height. Such design is to improve the load capacity as the bear will be able to load more steel balls.

● Double Row Angular Contact Ball Bearing: This type of bearing can withstand larger radial loads. The axial displacement is limited on the shaft on both sides by mainly combining radial, axial and moment loads. The tiltability of the inner and outer ring is mainly for limiting the bidirectional axial displacement of the shaft. The allowable tilt angle is depended on the internal clearance and design of the bearing, as well as the bearing size. The force and moment on the bearing as well as the maximum allowable tilt should be ensured that excessive stress is not to be exerted in the bearing. If there is an inclination angle between the inner and outer rings of the bearing, it will affect the lifespan of the bearing and reduce the bearing’s accuracy, while increase the noise.

Applications of Angular Contact Ball Bearing

In most applications, angular contact ball bearings are mostly used for moving parts. Some of the common applications include:

The application is actually depended upon the types of angular contact ball bearing. Single row angular contact ball bearings are mostly used for machine tool spindles, high frequency motors, gas turbines, centrifugal separators, front wheels of small cards, distinct pinion shafts, booster pumps, drilling platforms, food machinery, indexing heads, repair welding machines, low noise cooling tower, electrochemical equipment, coating equipment, machine tool slot plate, and arc welding machine.

Double row angular contact ball bearing, on the other hand, also has many applications, including fuel injection pump, printing machinery, planetary reducer, extraction equipment, cycloid reducer, food packaging machinery, electric welding machine, electric soldering iron, square Box, gravity spray gun, wire stripping machine, half shaft, inspection and analysis equipment, and fine chemical machinery.

Installing an Angular Contact Ball Bearing

Angular contact ball bears are quick and easy with regard to installation. The installation can take three forms: back to back, face to face and series arrangement.

For the back to back arrangement (where the wide end faces of the two bearings are opposite), the contact angle of the bearing contact spread along the axis of rotation, which can enhance the rigidity of its radial and axial support angles and has superb resistance to deformation.

For face to face arrangement, the narrow end faces of the two bears are opposite. During the installation, the contact angle of the bearing converges in the direction of the rotation axis, and the rigidity of the supporting angle is relatively small. Since the inner ring of the bearing extends out of the outer ring as the outer rings of the two bearings are pressed together, the original gap of the outer ring is eliminated, which can increase the preload of the bearing.

Lastly, when installed in series, the wide end faces of two bears are in a single direction. The contact angles of the bearings are in the same direction and are parallel of each other, so that the two bearings can share the working load in the same direction. However, in order to ensure the axial stability of the installation when using this type of installation, two pairs of bearings arranged in series must be installed oppositely at both ends of the shaft.

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