What is the function of ceramic bearings?

In the fields of aerospace, navigation, nuclear industry, petroleum, chemical industry, light textile industry, machinery, metallurgy, electrical energy, food, locomotives, subways, high-speed tool machinery and scientific research, defense and military technology, etc. Working Under special working conditions such as explosion, strong corrosion, vacuum, electrical insulation, non-magnetic friction, dry friction, etc. The indispensable replacement role of ceramic bearings is gradually recognized by people.

What is the difference between ceramic bearings and steel ball bearings?

How are ceramic bearings classified by material?

What are the common areas of application for ceramic bearings?

What is the difference between ceramic bearings and steel ball bearings?

1. The fatigue life of all-ceramic bearings can be 10–50 times longer than that of all-steel bearings. The service life of hybrid ceramic bearings is about 3-5 times longer than that of all-steel bearings; in terms of service life, ceramic bearings are much longer than steel ball bearings.

2. The coefficient of friction of ceramic bearings is low, so the lubricity of oil-lubricated ceramic bearings in dilution or lack of lubricating oil is still not lower than with conventional lubricants commonly used in steel bearings.

3. The stiffness of ceramic bearings is greater than that of metal bearings, and the modulus of elasticity of ceramic materials is high, and their stiffness is 15-20% greater than that of ordinary steel bearings.

4. Compared to metal bearings, ceramic bearings are more resistant to corrosion and wear. Because the material itself is different, the corrosion resistance and wear resistance of ceramic bearings are directly better than metal bearings.

How are ceramic bearings classified by material?

Classification of ceramic ball bearings:

Depending on material: ceramic bearings can be divided into zirconia ceramic bearings, silicon nitride ceramic bearings, composite ceramic bearings.

According to the integrity of the material: the main components of the ceramic bearing mentioned above are mainly ceramic materials, the inner and outer rings and rolling elements defined as ceramic bearing; It is called a hybrid ceramic bearing. The most widely used ceramic hybrid bearing is that the ball is made of ceramic material called ceramic ball bearing and can be divided into zirconia ceramic ball bearings and silicon nitride ceramic ball bearings.

What are the common areas of application for ceramic bearings?

Ceramic bearings are mainly used in CNC machine tools and high-speed precision machines, such as high-speed motor spindle bearings, machine tool spindle bearings, tooth drill bearings, instrument bearings, computer disk drive bearings, etc. In addition, the hardness of silicon nitride ceramics is 1-times higher than that of bearing steel, and the modulus of elasticity is about 1/3 higher. Under the same load conditions, the elastic deformation of silicon nitride ceramics is low. Therefore, the machine tool spindle with ceramic ball bearings has good running accuracy.

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