What is the distinguishing feature of precision ball bearing?

What is the distinguishing feature of precision ball bearing? What is the distinguishing feature of precision ball bearing? Practice has proved that as a bearing material but also the dimensional stability at different temperatures, to ensure the bearing temperature changes in the work environment, maintain the size of the precision and precise coordination, in exceptional circumstances must also has the capability of corrosion resistance, resistance to decomposition. So what are the characteristics? The following points: 1, low density. Due to the rolling body density decreases, and the work at the same time as the centrifugal load decreases, and thus can work at higher speeds. 2, moderate elastic modulus. Elastic modulus is due to stress concentration and reduce the bearing capacity of the bushing. 3, small thermal expansion coefficient. Reduced sensitivity to the temperature change, make the bearing more wide working temperature range. 4, high compressive strength. High compressive strength is the need of rolling bearing under high stress. 5, high hardness and high toughness. Combining these two features better surface roughness can be obtained; But also can prevent external particles and impact damage. 6, good resistance to rolling contact fatigue and spalling failure mode. 7, special occasions should have high temperature resistance, corrosion resistance and stability. ( Return] A: bearing factory bearing classification have? Next: what is the material classification bearing factory bearing?