Rolling bearings refer to bearings that contain rolling elements between parts for rolling motion; sliding bearings are bearings that do not use rolling elements and only work under sliding friction.

Rolling bearings have the advantages of small friction coefficient, good transmission and mechanical properties, and are currently the dominant type in the bearing industry, especially for mechanical equipment that requires high operating speed. Rolling bearings have achieved standardization, serialization and generalization, which are suitable for mass production and supply, which also promotes the overall development of rolling bearings.

Sliding bearings have the advantages of small size, high carrying capacity, low vibration, low noise, and many structural changes. Therefore, it is necessary to use sliding bearings in the occasions where the load is large and the structure is compact, and where the precision is high and no vibration is allowed; and the advantages of many structural changes also make the sliding bearings applicable to various mechanical parts of different shapes. . Rolling bearings and sliding bearings complement each other to achieve the best movement of mechanical equipment.

The difference between sliding bearings and rolling bearings:

The structure is different. The sliding bearing supports the rotating shaft by a smooth surface, so the contact part is a surface; the rolling bearing supports the rotating shaft by the rotation of the rolling body, and the contact part is a point. The more rolling bodies, the contact point more and more.

The movement method is different, the movement method of the rolling bearing is rolling; the movement method of the sliding bearing is sliding, so the friction form is completely different.

Advantages of plain bearings:

Most of the sliding bearings are based on copper alloy, which has the characteristics of high strength, good wear resistance and corrosion resistance, and is suitable for working under conditions of medium speed, high turbidity and impact load.

The load capacity of the same volume as the rolling bearing is much larger.

Small vibration and noise, able to withstand impact and vibration loads, used in occasions that require high precision and vibration is not allowed.

The impact on metal foreign matter is small, and it is not easy to cause early damage.

Long service life, under high-speed working conditions, it can run at high speed for a long time under the condition of liquid lubrication.

High running precision, balanced work, no noise.

The structure is simple, which can make the mechanical structure compact and easy to assemble and disassemble.