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Application Fields And Advantages Of Ceramic Bearings

Mar. 12, 2023

Comparison of the performance of four bearing materials: ordinary bearing steel AISI52100 (GCr15), stainless steel AISI440 (9Cr18), silicon nitride (Si3N4) and zirconia (ZrO2). 

As an important mechanical foundation, ceramic bearing, due to its excellent performance unmatched by metal bearing, is the first in the new material world in terms of high temperature resistance and super strength. In the past ten years, it has been increasingly widely used in various fields of the national economy and people's livelihood.

Application Fields And Advantages Of Ceramic BearingsApplication Fields And Advantages Of Ceramic BearingsApplication Fields And Advantages Of Ceramic Bearings

1. Application fields of ceramic bearings

Medical instruments, cryogenic engineering, optical instruments, high-speed machine tools, high-speed motors, printing machinery, food processing machinery.

In the fields of aerospace, navigation, nuclear industry, petroleum, chemical industry, light textile industry, machinery, metallurgy, electric power, food, locomotive, subway, high-speed machine tool and scientific research and defense military technology, it is necessary to work under special working conditions such as high temperature, high speed, deep cold, flammable, explosive, strong corrosion, vacuum, electrical insulation, non-magnetic, dry friction, etc., and the indispensable replacement role of ceramic bearings is being gradually recognized.

With the continuous progress of processing technology and the increasing improvement of technological level, the cost of ceramic bearings has been falling. It has been applied only in a small range of high, fine and sharp fields in the past, and gradually extended to various industrial fields of the national economy. The market price of products is also gradually approaching the practical level, reaching the level acceptable to users. The wave of large-scale application of ceramic bearings has come!

2. Advantages of ceramic bearings

First, because ceramics are almost not afraid of corrosion, ceramic rolling bearings are suitable for operation under harsh conditions full of corrosive media.

Second, because the density of the ceramic rolling ball is lower than that of steel, and its weight is much lighter, the centrifugal effect on the outer ring during rotation can be reduced by 40%, and the service life can be greatly extended.

Third, ceramics are less affected by thermal expansion and contraction than steel, so when the bearing clearance is fixed, the bearing can be allowed to work in an environment with relatively drastic temperature difference.

Fourth, because the elastic modulus of ceramics is higher than that of steel, it is not easy to deform when stressed, so it is beneficial to improve the working speed and achieve high accuracy.

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