All bearings are very unique in their construction and have special capabilities to carry loads. Ball bearings have a position area in the field of bearings. It is common for every bearing to be named based on its rolling element and the same applies to the ball bearings. Here the rolling elements are nothing but Spherical balls.
Ball bearings are also called as Deep grove Ball bearing because of their constructional aspects. The balls are made to run in deep grooves formed in the inner race and outer race of the bearing. Ball Bearing is found in everything from inline skates to hard drives. These bearings can handle both radial and thrust loads, and are usually found in applications where the load is relatively small. In a ball bearing, the load is transmitted from the outer race to the ball and from the ball to the inner race. Since the ball is a sphere, it only contacts the inner and outer race at a very small point, which helps it spin very smoothly. But it also means that there is not very much contact area holding that load, so if the bearing is overloaded, the balls can deform or squish, ruining the bearing
Inner Race This is the part that is mounted on the rotating shaft and tends to rotate the shaft.
Outer Race This is the part that is mounted to the housing and is stationary. This also serves as a means for transferring the loads from the bearing to the housing.
Rolling Element Balls These are the elements that carry the load distributing it throughout the raceways. They tend to rotate about the inner race, but not at the speed the inner race rotates. It is something like the relation between the earth and the moon.
Cage This is an important element in the bearing. This acts as a barrier between the balls preventing them from bumping into each other.