How to install flat bearings?

A flat bearing consists of a flat cage assembly with needle or cylindrical rollers and a flat washer. Flat bearings are divided into flat bearings with needle rollers and flat 

bearings with balls. It is the most common type of rolling bearing. The basic deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls, and a 

retaining structure.

There are two types of deep groove ball bearings: single row and double row. The code for single row deep groove ball bearings is 6, and the code for double row deep 

groove ball bearings is 4. Its structure is simple, easy to use, and it is the most commonly produced and widely used type of bearing. It mainly bears radial loads and can 

also withstand both radial and axial loads simultaneously. When it only bears radial loads, the contact angle is zero.

When deep groove ball bearings have a large radial clearance, they have the performance of angular contact bearings and can withstand large axial loads. The friction 

coefficient of deep groove ball bearings is very small, and the maximum speed is also high. How to install a flat bearing is to install it on a shaft, withstand axial loads, 

and have the upper and lower parts rotating together with the shaft and the inner ring of the bearing rotating together. The installation method of loose ring for planar 

thrust bearings. Planar thrust bearings mainly bear axial loads in the assembly body and are widely used. Although the installation operation of thrust bearings is relatively 

simple, errors often occur during actual maintenance, that is, the installation positions of the tight and loose rings of the bearings are incorrect, resulting in the bearings 

losing their function and the journal being quickly worn. The figure shows that the tightening ring is installed on the end face of the stationary part, which is an incorrect 

assembly.

The inner ring of the tight ring is in a transitional fit with the shaft neck. When the shaft rotates, it drives the tight ring and rubs against the end face of the stationary part. 

When subjected to an axial force (Fx), the friction torque will be greater than the inner diameter fitting resistance torque, causing the tight ring and shaft fitting surface to 

forcibly rotate, exacerbating the wear of the shaft neck. Therefore, the following points should be noted when installing thrust bearings. (1) Distinguish between the tight 

and loose rings of the bearing (judged based on the inner diameter of the bearing, with a difference of 0.1-0.5mm in aperture). (2) Distinguish the stationary parts of the mechanism (i.e. non moving parts, mainly referring to the assembly body). (3) Regardless of the situation, the loose ring of the bearing should always rest against the end 

face of the stationary part.