High temperature field:

The transmit roller of high temperature furnaces:Si3N4 ceramic retains strength and harden-ss nearly up to 800℃,and Aluminum oxide 、silicon carbide nearly up to 1000--1400℃.

High-speed rotation field:

Such as high speed motor spindle bearings,main shaft bearings of machine.The specific gra-vity of Si3N4 is 3.20g/cm and that of bearing steel is 7.85g/cm,We can see the former ismuch lower than the latter,therefor the ceramic rolling elements can effectively restrain the centrifugal force,which produces in high speed rotation,and reduce the load of rolling ele-ments and race way corresponding reduces.This is good to prevent surfaces from damage.. 

Aviation and airspace fields:

The coefficient of thermal expiation of Si3N4 is 0.0000032/k but that of bearing steel is 0.00001/k,that are nearly in the ration of 1 to 4. Thereford Si3N4 cermic bearings are mo-re stable and reliable in a temperature changeable condition. 

Main shaft of machine tools:

The Si3N4 ceramic has double the hardness of bearing steel,and 1/3 modulus of elasticitylarger than that of bearing steel,We can found that the elastic deformation of Si3N4 is small under an identical loading. 

Chemical machinery,food industry and marine industry: 

The ceramic bearings can solve corrosion problems Ex. acid ,alkali ,salt and so on. 

High vacuum field:

In high vacuum field people take the advantage of self-lubrication of ceramic bearings to replace the bearing in order to prevent vacuum from lubrication contamination. 

Strong magnetic environment:

A strong magnetic environment the metal powder which is produced from wear of steel bearing,adheres the surfaces of rolling element and race way and causes flanking in aduance and increasing noise. The solution to this problem is also using ceramic bearing. 

Toys ,roller skates,model navigation and motor-driven toys:

It is the price factor of ceramic bearing that limits its wide use in the world.So up to no-w most applications of ceramic bearing are merely in high speed,high precision mechanism,in addition the hybrid construction of ceramic bearing,that is ceramic ball with steel inn-er ring and outer ring,is most adopted.Owing to adopting net shaping technology the using of above mentioned spheres but also of roller skates,model navigation and motor-driven toys. 

Ceramic Bearings-----Catalog

Ceramic Material: Si3N4, ZrO2, Al2O3, SiC, B4C. Silicon nitride (Si3N4), Zirconia (ZrO2)(TZP-3Y), Aluminum oxide (Al2O3) (99.5%), silicon carbide (SiC) and B4C. (GPS, normal press sintering ).

1. Full Ceramic Bearings (The outer ring, the inner ring and balls are made of the ceramic, even cages are made of ceramics, usually the cage is made of Teflon). P0-P4, ABEC1-ABEC7, The bearings min inner: 4mm, max outer: 180mm.

From -196℃ to 1400℃. Full Ceramic Bearing is High-tech Product. Ceramic Parts. In acid, alkali, salt, Zirconia (ZrO2)’, silicon carbide (SiC)’, Silicon nitride (Si3N4)’ uncorrosion ability is 20, 100, 1000 times than SUS440C.

(1). Full Ceramic Deep Groove Ball Bearings.

(2). Full Ceramic Angular Contact Ball Bearings.

(3). Full Ceramic Arrange Pair Self-Aligning Ball Bearings.

2. Ceramic balls. The size: from 0.5mm-90mm. Grade G5-G100. Ceramic Material: Si3N4, ZrO2, Al2O3, SiC, B4C.

3. P4 tolerance, Hybrid Precision Ceramic Ball Bearings. (Outer ring and inner ring are made of steel). P0-P4, The bearings min inner: 2mm, max outer: 220mm. ZV3, Hybrid Precision Ceramic Ball Bearings .Dental bearing using ceramic balls .608zz: Si3N4, ZrO2 or Al2O3 balls and stainless or GCr15.

4. Ceramic Material: Si3N4, ZrO2, Al2O3, SiC, B4C Ceramic Parts. Non-standard bearing orders to specifications arranged by customers are also welcomed. the ceramic bearings have been successfully applied in aviation and aerospace spheres, high speed main shaft, dental drill instrument bearing, computer hard disk driver and electric fan, anti-magnetic, anti-corrosion, high-temperature, applications.

CHINA NATIONAL BEARING JOINT IMPORT & EXPORT CORP.

11F, Wuhua Building A4.Chegongzhuang St.Beijing 100044, China

TEL:0086-10-68002421  FAX; 0086-10-68005678 

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