Thin-wall bearings are widely used in all walks of life. Suitable thin-wall bearings can improve the characteristics of the main engine, increase the service life more easily, reduce the failure rate of equipment, reduce maintenance costs and improve work efficiency. So how to select the appropriate thin-wall bearings? Today I will give you the answer. How to select suitable thin-wall bearings?

1. Bearing quality

Observe and check whether the surface of the thin-wall bearing is smooth, whether there are magazines and periodicals, agglomeration and other conditions, and then check whether the bearing is bitten and worn, and whether there are cracks, dents, rusts and other problems on the surface of the inner and outer rings, ball bearings and rolling bodies of the thin-wall bearing. Accurate measurement of bearing backlash is not over budget; Check whether the coupling is worn, pit point peeling, if there are the above conditions should be replaced with a new bearing.

2. Working nature of bearings

Select the basic type and tolerance level backlash of thin-wall bearings from load orientation and type, speed ratio, lubrication mode, parallelism regulation, accurate or inaccurate positioning, natural environment for assembly and maintenance, working temperature and so on.

3. Check the rated load and limit speed ratio of bearings

The important reference standards for the selection of thin-wall bearings are the limit speed ratio, the regulation of dacron service life and load level. Other factors are conducive to the definition of thin-wall bearing types, structures, ruler time and tolerance grade table and the solution of clearance engineering.

4, bearing coordination

Equipment bearing nominal diameter and shaft, diameter and housing of the match is very important, when the match is too loose, the mating surface will appear relative sliding known as stress relaxation. Once the stress relaxation is produced, it will wear the mating surface, harm the shaft or housing, and wear powder will enter the internal structure of the thin-wall bearing, resulting in hot, shock and damage. When the clearance is too large, the outer diameter will decrease or the nominal diameter of the inner hole will increase, and the clearance of the internal structure of the bearing will be reduced. In order to choose the appropriate fit, various standard factors such as bearing load characteristics, size, ambient temperature standards and rotation of the outside of the inner hole are considered.

5, the change of the gap

If the gap of thin-wall bearing is too long, the shear stress friction loss of plant oil in the gap is too large, it will cause the bearing to be hot. At the same time, if the gap is too long, the remaining oil will be reduced, which can not bring the contradiction to generate heat, and the temperature of the bearing will be improved step by step. However, too large gap will often change the dynamic characteristics of the bearing, resulting in unstable operation of the motor rotor. Therefore, suitable bearing voids are required to be selected for different machines and equipment and application standards.