Selection of deep groove ball bearing
Choosing the right bearing is very important. There are many factors involved. The following outlines several aspects to consider when selecting bearings.
Selection of clearance of deep groove ball bearing
When purchasing deep groove ball bearings, users usually only tell them the model and grade, and rarely put forward requirements for the clearance of deep groove ball bearings. Business personnel must ask about the service conditions of deep groove ball bearings, in which the speed, temperature and fit tolerance of deep groove ball bearings are directly related to the selection of clearance of deep groove ball bearings. Generally, CM clearance is mostly used for motors with speed below 3500 rpm. For example, relatively large clearance is required for high-temperature and high-speed motors.
After assembly, the clearance of deep groove ball bearing will be reduced due to the increase of inner hole and the reduction of outer circle. The reduction of clearance = interference × 60% (except that the deep groove ball bearing chamber is aluminum). For example, if the clearance of deep groove ball bearing before assembly is 0.01mm and the interference during assembly is 0.01mm, the clearance of deep groove ball bearing after assembly is 0.004mm.
Theoretically, the noise and service life of deep groove ball bearing reach the best state when there is zero clearance, but considering the problems such as temperature rise in actual operation, the clearance of deep groove ball bearing after assembly is 0.002mm-0.004mm.
Selection of grease
The selection of grease is generally based on the speed, temperature resistance, noise requirements and starting torque of deep groove ball bearings. The business personnel are required to understand the performance of various greases.
Selection of sealing type of deep groove ball bearing
The lubrication of deep groove ball bearings can be divided into oil lubrication and grease lubrication. Oil lubricated deep groove ball bearings are generally in the form of deep groove ball bearings, and grease lubricated deep groove ball bearings are generally sealed with dust covers or rubber seals. The dust cover is suitable for parts with high temperature or good service environment. The seals are divided into contact seal and non-contact seal. The contact seal has good dust-proof performance but large starting torque, and the non-contact seal has small starting torque, but the sealing performance is not as good as the contact seal.
At present, deep groove ball bearings are professionally manufactured in automobile motor deep groove ball bearings, household appliance motor deep groove ball bearings, motorcycle deep groove ball bearings, health care motor deep groove ball bearings and other industries, so as to optimize the noise and service life of deep groove ball bearings.
The main type we produce are as follow,
