subject: Angular Contact Bearings Are A Kind Of Ball Bearings [print this page] These ball bearings are a type of rolling element bearing that needs balls to sustain the division between the bearing races. The main function of a ball bearing is to minimize the rotational friction and lend support to axial and radial loads. It uses a minimum of two races to maintain the balls and transfer the load through them. In the functioning of applications, ideally, one race is fixed to the rotating assemble while the other race remains stationary. The moment the clutch bearing race starts to rotate automatically the balls also start rotating as well. Since the balls are in a rolling motion therefore the density of friction is much lower, which would not be the case there was a rotating movement between two flat surfaces.
Ball bearings are available in different types of designs and there is a number of them that are extremely common among which Angular contact is one of them. Ball bearings can be constructed from different types of materials such as chrome steel, stainless steel and ceramic. There is even a hybrid bearing which is a combination of races made from metal and ceramic balls.
More about Angular Contact Bearings
Angular contact bearing makes use of asymmetric races axially. Ideally, an axial load has to go through a straight line through the clutch bearing. In case of a radial load, it has to take a more oblique path that ends up dividing the races axially. Hence, the inner race has the same angle of contact like the outer race. Angular contact bearings lend support to loads that are combined, for instance, the loads of both axial and radial directions. It is also important that the contact angle needs to match up with the relative proportions as well. In fact in case of large contact angle, the axial load will be supported more and thereby reduce the radial load.
In case of applications that require high speed such as jet engines, turbines and even dentistry related equipment the bearing balls generate centrifugal force, which can modify the angle at both the inner as well as outer race. Nowadays silicone nitride is one type of ceramic that is being used quite a bit in such applications because it is known for its low density. These materials tend to minimize the centrifugal function and force in environments that witness high temperatures. In fact most of the cycles use angular-contact bearings especially for the headsets, as the forces that these bearings apply exist both in the axial as well as radial directions.
Overall, the significance of these angular contact bearings cannot be under estimated because they are extremely important for high speed applications. There are many manufacturers who concentrate on manufacturing these angular contact bearings and ensuring they are made from the finest quality. They are needed by many industries and therefore it becomes important that the right kind of materials is used in manufacturing quality angular contact bearings.
