The 7 major performance of bearings

Step 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 bearings in use is generally up to HRC61~65, so that bearings can obtain higher contact fatigue strength and wear resistance.

2. Rust resistance

In order to prevent bearing parts and finished products from being corroded and rusted in the process of 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 bearing and double row radial spherical roller bearing have good aligning performance. The working speed of the rolling bearing 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 improve the limit speed.

4. Lubrication performance

Bearing lubrication aims to reduce internal friction and wear of bearings, 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 matter from intruding into the bearing, or preventing rust and corrosion.

5. Wear resistance

When the bearing is working, not only rolling friction, but also sliding friction occurs between the ring, the rolling body and the cage, so that the bearing parts are constantly worn. In order to reduce the wear of bearing parts, maintain the accuracy and stability of bearings and extend the service life, bearings 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 very high contact fatigue strength.

7. Processing performance

Bearing parts in the production process, to go through many cold and 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 properties, machining properties, hardenability and so on.