How to Choose Bearings?

1. bearing model selection

Bearing models are generally selected by the user's technical staff according to the conditions of use of supporting products and bear load. Business personnel mainly understand whether the actual load of the user and the selected bearings, if the bearings do not meet the requirements for use, should be recommended as soon as possible customer re-election model, but unless special products in the selection of models generally will not have any problems.

2. bearing gap selection

Users in the purchase of bearings will generally only inform in what model, grade, rarely will be the bearing gap requirements, business personnel must ask the bearing conditions, wherein the bearing speed, temperature, with tolerance are directly related to the selection of bearing clearance. Generally at 3500 rpm speed of the motor is mostly using CM play, such as high-temperature high-speed motor requires a relatively large play. Bearing gap after assembly will be due to the rise of the inner hole and the reduction of the outer circle resulting in a reduction, the reduction of the gap is the amount of over-profit x 60% (except for the bearing chamber is aluminum). For example, the pre-bearing clearance is 0.01mm, the over-profit is 0.01mm when assembly, then the bearing assembly after the play gap is 0.004mm. In theory, the noise and life of the bearings in the zero play gap are in the best state, but in the actual operation to take into account the temperature rise and other issues, the bearing after assembly gap of 0.002mm-0.004mm is better.

3. the choice of grease

The choice of grease is generally based on the speed of the bearing, temperature resistance, noise requirements and starting moment, etc. to choose, requiring business personnel to understand the performance of various greases.

4. bearing seal type selection

The lubrication of bearings can be divided into oil lubrication and grease lubrication. Oil-lubricated bearings are generally selected form bearings, grease-lubricated bearings generally use dust caps or rubber sealseals. The dust cover is suitable for high temperatureors or areas with good use of the environment, and the seals are in contact.