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How much do you know about high temperature ceramic bearing?

3,210 Published by Jun 18,2021

Ceramic bearings generally can withstand very high temperatures, and the limit temperature can reach 1200. However, it can only be achieved with ceramic cage, graphite cage or without cage. The temperature resistance of hybrid ceramic bearings (steel inner and outer rings and ceramic balls) is lower. If matched with steel cage, it can only reach the limit of 600 Temperature, but due to the high hardness of the ceramic ball, light weight.

high temperature ceramic bearing

Zirconia high temperature ceramic bearing
Advantages of high temperature ceramic bearing:
First, because ceramics are almost not afraid of corrosion, high temperature ceramic bearing are suitable for operation under harsh conditions full of corrosive media.Second, because the density of ceramic high-temperature bearings is lower than steel, and the weight is much lighter, the centrifugal effect of the outer ring during rotation can be reduced by 40%, and the service life is greatly extended.
Third, ceramics are less affected by thermal expansion and contraction than steel, so when the bearing gap is constant, the bearing can be allowed to work in an environment where the temperature difference changes more drastically.

original high temperature ceramic bearing

Alumina high temperature ceramic bearing
Fourth, since the elastic modulus of ceramic is higher than that of steel, it is not easy to deform when subjected to force, so it is beneficial to increase the working speed and achieve higher accuracy.

The ferrules and rolling elements of high temperature ceramic bearing are made of all-ceramic materials, including zirconia, silicon nitride, and silicon carbide. The retainer is made of polytetrafluoroethylene, nylon, polyetherimide, zirconia, silicon nitride, stainless steel or special aviation aluminum, thereby expanding the application range of high temperature ceramic bearing.

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Contact: Ellen
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