Bearing is used to support the parts, but also used to support the rotating parts on the shaft, as an important part of contemporary machinery, widely used.
1. Hardness
Hardness is one of the important qualities of bearing quality, which has a direct effect on contact fatigue strength, wear resistance and elastic limit. The hardness of the bearing in the use state is generally to reach HRC61~65, so that the bearing can obtain higher contact fatigue strength and wear resistance.
2. Anti-rust performance
In order to prevent bearing parts and finished products from being corroded and rusted during processing, storage and use, bearings are required to have good anti-rust performance.
3. Aligning performance
When the center line of the shaft is tilted relative to the center line of the bearing seat hole, the bearing can still work normally. Double row radial spherical ball bearings and double row radial spherical roller bearings have good aligning performance. Rolling bearing working speed should be lower than the limit speed. Selecting high-precision bearings, improving cage structure and materials, using oil mist lubrication, improving cooling conditions, etc., can increase the limit speed.
4. Lubrication performance
The lubrication purpose of the bearing is to reduce the internal friction and wear of the bearing and prevent burning and sticking; Extend its service life; Discharge friction heat, cooling, prevent bearing overheating, prevent lubricating oil itself aging; It also has the effect of preventing foreign bodies from intruding into the bearing, or preventing rust and corrosion.
5. Wear resistance
When the bearing is working, not only rolling friction occurs between the ring, the rolling body and the cage, but also sliding friction occurs, so that the bearing parts are constantly worn. In order to reduce the wear of bearing parts, maintain the bearing accuracy and stability, and extend the service life, the bearing should have good wear resistance.
6. Contact fatigue strength
Bearing under the action of periodic load, the contact surface is easy to occur fatigue damage, that is, cracking and spalling, which is the main form of bearing damage. Therefore, in order to improve the service life of bearings, bearings must have high contact fatigue strength.
7. Processing performance
Bearing parts in the production process, to go through many cold, hot processing processes, in order to meet the requirements of large quantities, high efficiency, high quality, bearing should have good processing performance. For example, cold and hot forming performance, cutting performance, hardenability and so on.
Post time: Nov-20-2023