ZYS ceramic bearing ball

Si3N4 possesses high temperature resistance, corrosion resistance, etc. ZrO2possesses high strength, high hardness, etc.

 

ZYS Brief Outline

Tenet: To lead the science and technology development of bearing industry and to improve the world’s equipment level.

Spirit: To keep continuous improvement, to pursue brilliance

Core values:Integrity, rigor, innovation, mutual benefit

Luoyang Bearing Science & Technology Co., Ltd. is a high-tech enterprise, which focuses on the research and development of “high-tech, precise, cutting-edge, specialized and special” bearing products, which are applied to the mainframes of national economic construction in various fields and national defense construction. It was listed at Shenzhen Stock Exchange with stock code 002046 in 2005.

The company has a strong strength of manufacturing high-precision and high-reliability bearings and relevant parts. The “high-tech, precise, cutting-edge, specialized and special” bearing products have been widely applied to aviation, spaceflight, navigation, machine tool, wind turbine generator, metallurgy, petroleum, chemical, medical treatment, rail transport, automobile, textile, and other fields.

As a leading enterprise in aerospace bearing industry of China, the company has successfully accomplished the milestone tasks of bearing assemblies for “Dong fang hong” series man-made satellite, manned spacecraft series from “Shenzhou 1” to “Shenzhou 7” and “Chang’E” lunar exploration program, which are commended by relative administrative departments for several times.

Main business: the research, development, manufacture and sales of precision bearings, special bearings, high-frequency electric spindles for machine tool, special technical equipments for bearing, testing instruments and special materials of bearing.

Science and technology institutions:

China National Accreditation Laboratory for Bearing

State Key Laboratory for Bearings of Earth Pressure Balance Shield

State Quality Supervision and Testing Center for Bearing

National Technical Committee for Rolling Bearing Standardization

ISO/TC4 China Secretariat

National Patent Exchange Workstation

The Technical Committee of China Bearing Industry Association

The Research Center for High-speed Precision Bearing Engineering in Machinery Industry

Henan Technology Research Center for Machine Tool Spindle Engineering

Provincial Technology Center

Post-doctoral Scientific Research Workstation

The Bearing Industry Branch of Machinery Industry Professional Skill Appraisal Center 

 

Ceramic Ball Series Product

1.       Si3N4 ceramic ball

 

Si3N4 is a new kind of bearing material with several good features, it possesses high temperature resistance, corrosion resistance, insulation, non-magnetism, high strength, low density and other features. In the application of bearing, it possesses low friction, low temperature rise, high rigidity, low centrifugal force and other features. It can implement high speed, high precision, high temperature, high rigidity, corrosion resistance and other good features.

The high precision and high performance silicon nitride bearing ball is manufactured by  spray-drying process, near-net-shape, cold isotatic pressing, GPS-HIP combined sintering, compounded abrasive lapping process effectively. The precision grade of it is G5, the materials class is I.

Si3N4 ceramic ball material grades

Class Item		Materials class
		I	II	III
Property	Bending strengthσ3.40(Mpa)	900	800	600
	Crushing load ratio(%)	35	35	30
	Hardness(HV10)	1580	1480	1380
	Fracture toughness(Mpa.m1/2)	6.0	5.0	5.0
The limit does of fiber structure	Pore size(μm)	10	10	25
	Porosity(%)	0.02	0.06	0.06
	Crystal phase(μm)	10	10	25
	The second ceramic phase(μm)	25	25	25
The maximum of inclusion of transverse section every Square centimeter	Range 200(μm)	0	0	1
	Range 100~200(μm)	0	1	2
	Range 50~100(μm)	1	2	4
	Range 20~50(μm)	4	8	16

Examples of Si3N4 ceramic ball’s common applications

	G3	G5	G10 G16	G20 G28 G40
Class I	High speed power equipment Space mechanism Aircraft instrument	Liquid oxygen pump Active shaft bearing	The key parts of aerospace equipment
Class II	Molecular turbo-pump High precision star bearing	Vacuum equipment, high speed instrument, mechanical devices, high performance and the most advanced contacting spherical propeller	Motor, medium-low precision star bearing	Testing bearing ball, separating bearing ball
Class III			Sport, entertainment, food processing	Mechanical devices

Si3N4 ceramic ball specifications

The nominal diameter of bearing ball		The nominal diameter of bearing ball		The nominal diameter of bearing ball
mm	in	mm	in	mm	in
0.794	1/32	5		8.731	11/32
0.8		5.5		9.525	3/8
1		5.556	7/32	11.112	7/16
1.588	1/16	5.953	15/64	12.303	31/64
2		6		12.7	1/2
2.381	3/32	6.35	1/4	13.494	17/32
2.5		6.5		14.288	9/16
3		6.747	17/64	15.081	19/32
3.969	5/32	7		15.875	5/8
4		7.144	9/32	19.05	3/4
4.5		7.5		25.4	1
4.762	3/16	7.938	5/16	31.75	1 1/4

Note:  The special specification can be manufactured after negotiating

2.       ZrO2 ceramic ball

 

ZrO2 ceramic possesses high strength, high hardness, high rigidity, high toughness, high wear resistance, self-lubricity and other features. In the application of bearing, it can implement high temperature, high rigidity, corrosion resistance and other good properties. At the same time, it is used as valve ball in petrochemical , metallurgy, papermaking, electro-planting and other fields.

Si3N4 ceramic ball specifications

The nominal diameter of bearing ball		The nominal diameter of bearing ball		The nominal diameter of bearing ball
mm	in	mm	in	mm	in
0.5		5.159	13/64	12.303	31/64
0.6		5.5		12.7	1/2
0.794	1/32	5.953	15/64	13.494	17/32
0.8		6		14.288	9/16
1.588	1/16	6.35	1/4	15.081	19/32
2.381	3/32	6.5		15.875	5/8
2.5		6.747	17/64	16.669	21/32
2.778	7/64	7		17.462	11/16
3.175	1/8	7.144	9/32	18.256	23/32
3.5		7.5		19.05	3/4
3.969	5/32	7.938	5/16	20.638	13/16
4		8.5		22.225	7/8
4.5		9.525	3/8	28.575	1 1/8
4.762	3/16	10		31.75	1 1/4
5		11.112	7/16

Note:  The special specification can be manufactured after negotiating

 

ZYS ceramic bearing ball