1、 The main functions of bearings

1. The shaft and supporting parts that reduce rotational friction will definitely experience friction. Bearings are used between the rotating "shaft" and the rotating support part. Bearings can reduce friction, make rotation smoother, and reduce energy consumption. This is the greatest impact of bearings.

2. There will be a significant force between the axis that protects the rotation support part and the rotation support part. Bearings can effectively prevent damage to the rotating support part due to this force, keeping the rotating "shaft" in the correct position. It is precisely because of the important role of bearings that we can carry out long-term repeated use of the machine.

2、 Structure of bearings

1. Inner ring (also known as inner sleeve or inner ring): usually fixed on the shaft neck, the inner ring rotates together with the shaft. There are grooves on the outer surface of the inner ring for steel balls or rollers to roll, called inner grooves or inner raceways.

2. Outer ring (also known as outer sleeve or outer ring): usually fixed on the bearing seat or the shell of the machine, serving to support the rolling element. There are also grooves on the inner surface of the outer ring for steel balls or rollers to roll, called inner grooves or inner raceways.

3. Rolling element (steel ball or roller): Each set of bearings is equipped with one or several sets of rolling elements, which are installed between the inner and outer rings and play a role in transmitting rolling forces.