Bearing selection of fit right or wrong not only affects the normal operation of the machine, also affect the angular contact ball bearing performance. Therefore, proper selection of tie is very important, combined with selection and related to many factors, but mainly depends on the type, size of the load, operating temperature and running accuracy of the bearing.
If bearings are iron, burrs, dust and other foreign bodies from entering into, will generate noise and vibration when the bearing in operation, can damage the raceways and rolling elements. Therefore, before installing the bearings, you must make sure that the mounting surface and clean installation environment.
Bearing surfaces coated with antirust oil, you need to carefully clean with clean petrol or kerosene, and then coated with a clean high quality or high speed and high temperature lubricant grease before installation. Cleanliness of diagonal contact ball bearing life and noise and vibration effects are very large. But we wish to remind you of is: sealed bearings do not need cleaning and refueling.
Lubrication for operation and service life of the bearings have an extremely important effect, here to brief you choose general principle of grease. Grease is made of base oils, thickeners and additives, different types and a description of different grades of lubricating grease performance varied widely, allowing rotation limit of different, when you choose it is important to note. Grease performance mainly decided by the base oil, low viscosity base oil suitable for low temperature, high speed, high viscosity suitable for high temperature, high-load. Bearing lubrication performance thickening agent, thickening agent for water resistance determines the resistance of lubricating grease to water. In principle, different brands of lubricant cannot be mixed, and, even if it is the same the grease thickener, also will bring bad effects due to different additives.
1) load size: radial equivalent dynamic load acting on the bearing of the basic dynamic load rating Cr and Pr scores for the three light and normal loads and heavy loads. To prevent slipping, heavy load is usually lower than in collaboration with light and normal loads tight.
2) operating temperature: rings of bearings in operation when the temperature is usually higher than the temperature of adjacent parts may be due to thermal expansion of the inner ring and shaft combined with loose ring may be affected by thermal expansion angular contact ball bearing axial play. Therefore, when you choose to meet the direction must take into account the differences in temperature and heat conduction.
3) running accuracy of the bearing: when you visit a friendly nation on behalf of one's own country requires a high running accuracy of the bearing and operation, to eliminate the effects of vibration of elastic deformation and should as far as possible avoid a clearance fit.
4) load types: according to the Act on synthesis of radial loads on the angular contact ball bearing vector relative to the rotation of the ring, ring the load is divided into a fixed load, Rotary and oscillating loads three types.


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