Dewin Group is dedicated to precise manufacture of advanced ceramic parts, providing high quality advanced ceramic products for customers all over the world and has experienced rapid development in this field for over 8 years .
We have a factory located in Shanghai, the area of 2000 square metres and the building area of 8000 square metres.
We have the whole process of ceramic manufacturing and precise machining. At present, our mainly product ceramic ball, ceramic bearing, ceramic ring, which are made from silicon nitride, zirconia, alumina or silicon carbide.
We also produce advanced ceramic parts to customer specification. We have an experienced engineer team to assist with customers’ special requirements. From prototype to production, our company will work with you to provide the optimum cost effective solution to your demanding applications.

 Compared with steel ball, Si3N4 ball has following advantages:

1. 59% lighter than steel ball, which means less centrifugal force and less wear on the groove during high speed and acceleration.

2. 44% larger elastic modulus, which means less deformation under load.

3. Harder with Rockwell hardness as 78.

4. Smaller friction coefficient.

5. Only 1/4 coefficient of thermal expansion of steel, can endure sharp fluctuation of temperature.

6. Superior surface finish can be achieved, Ra could be 4~6 nm.

7. Can endure high temperature with high hardness and strength up to 1050ºC.

8. Never rust, and can roll without lubrication.

9. More corrosion resistant than steel.

10. Free of metal contamination.

11. Non-magnetic.

12. Electric isolation.

13. No adhesive-wear.

All above combination makes Si3N4 to be first choice for bearing ball material.

Apply To:

Alumina ball is widely used in Ceramic industry,cement industry, paint industry, Color industry, 

chemical industry,pharmaceutical industry, coating industry and mining industry. 

Technical Data

Exhibition