Bearing Clearance Of Ball Bearings

What is ball bearing
Ball bearing is a kind of rolling bearing, the spherical alloy steel ball is installed in the middle of the inner and outer steel ring, in the rolling way to reduce the friction in the process of power transmission and improve the efficiency of mechanical power transmission.
Ball bearing components
Ball bearings mainly contain four basic components: ball, inner ring, outer ring and retainer.
The performance of ball bearings
Ball bearings are generally used in low - load mechanical transmission equipment.
Because the bearing area of ball bearings is small, it is easy to suffer serious mechanical damage at high speed, so needle roller bearings are often adopted in the mechanical transmission of heavy load to increase the bearing surface, improve the mechanical transmission efficiency, and reduce the mechanical damage.Ball bearings change the friction mode of bearings, the use of rolling friction, this way more effectively reduce the friction phenomenon between bearing surfaces, improve the service life of fan bearings, so the service life of the radiator will be extended.

Bearing clearance of ball bearings
Bearing clearance refers to the total distance that a set of bearing rings can move in a certain direction relative to another set of bearing rings before the bearing is installed with the shaft or bearing box.According to the movement direction, it can be divided into radial clearance and axial clearance.At the same time, we must distinguish the internal clearance of the bearing before installation from the internal clearance of the bearing when the operating temperature is reached after installation.The original internal clearance is usually greater than the operating clearance, which is caused by the difference in the degree of fitting involved in the installation and the difference in the thermal expansion of the inner and outer rings of bearings and related parts, which makes the inner and outer rings expand or contract.The size of internal clearance in rolling bearing operation has great influence on bearing performance such as fatigue life, vibration, noise and temperature rise.Therefore, the selection of internal clearance of bearings is an important research project for bearings whose structural size is determined.In order to obtain a stable test value, the specified test load is given to the bearing and then the clearance is tested.Therefore, the measured clearance value is larger than the theoretical clearance value, that is, one more elastic deformation induced by the test load.
In addition, the following points should be considered when selecting the most appropriate internal clearance according to the use conditions:
(1) Changes in clearance caused by the coordination of bearings with shafts and housing.
(2) Changes in clearance caused by temperature difference between inner and outer rings during bearing operation.
(3) The material used for the shaft and the housing affects the change of bearing clearance due to the different expansion coefficient.

The price of ball bearing
The price of ball bearing is affected by many factors such as market, material and quotation. If you want to know the specific price of ball bearing，please contact us to make enquiries.
Supplier of ball bearing:BMB Bearings
BMB Bearings is the complete one-stop supplier of OEMs and wholesalers purchasing high-precision, miniature ball bearings, industrial ball bearing related products, as well as related professional services, including world-class engineering and design. If you have any need, please feel free to contact us .