Bearing is a part of the machine and plays an important role in the process of mechanical operation. It can well reduce the friction coefficient of the load and keep the axis fixed. After the bearing is installed, the mechanical rotating body is well supported, so that it can run better. If the bearings are divided according to the different friction properties during the movement, they can be divided into two types, one is rolling bearing and the other is sliding bearing.

Rolling bearing and sliding bearing are just a big classification. In the actual production process, there are more than a dozen bearings produced. Today, we will introduce some more important ones. The first type is deep groove ball bearing, which has a continuous groove raceway in the ring, and the cross section of the raceway is about one-third of the equatorial circumference. The load borne by this kind of bearing is generally radial, and it can well bear the axial load with changing direction. This type of bearing has many advantages, such as low friction and high speed. , so users use a lot, mass production, a large part of which is used for export.

The second kind of bearing introduced is needle roller bearing. Generally speaking, some rollers are installed on this bearing. Most of these rollers are thin and long, and the radial structure is very compact, so when the inner diameter is the same as other bearings, the outer diameter is the smallest. Needle roller bearings can be further divided into solid needle roller bearings and thrust needle roller bearings according to different application fields. The volume of solid needle roller bearing can be reduced to a certain extent and can bear a relatively large load. Thrust needle roller bearing can bear the load in one direction, does not occupy too much space, and can be used if the mechanical design is compact.

The third kind of bearing introduced is self-aligning ball bearing, which is equipped with drum rollers and has certain self-aligning function. It can automatically adjust the shaft when the shaft is twisted, thus reducing the burden on the bearing. This bearing can be used if the main load during the operation of the machine is heavy and there is impact. The inner diameter of the inner ring of this bearing is tapered and can be directly installed. This kind of bearing is also widely used, including the production of precision instruments, automobiles, motorcycles, machinery, metallurgy, petroleum and other industries.

Each bearing has its own advantages and disadvantages, and users should choose the appropriate bearing according to their own needs.