Zys Rolling Element Precision Bearing Ball 9cr18/9cr18mo Stainless Chrome Steel Ball, Silicon Nitride Ceramic Balls, Zro2 Zirconia Ceramic Ball G10 for Bearing

Product Description

ZYS rolling element precision bearing ball 9Cr18/9cr18Mo Stainless Chrome Steel Ball, silicon nitride ceramic balls, ZrO2 Zirconia ceramic ball G10 for Bearing 

Product Description

The development history of ZYS silicon nitride ceramic balls:

1986-1990 Exploratory research on ceramic bearings

1991-1995 Preliminary Research on Ceramic Ball Bearings and Ceramic Balls for Bearings

1996-2000 Mass manufacturing technology development of high-speed precision ceramic ball bearings

2000-now Comprehensively improve the level of silicon nitride manufacturing

 

Production process of ZYS silicon nitride ceramic balls:

Raw material-granulation-pressing-cold isostatic pressure vessel-air pressure sintering vessel-grinding process-testing and inspection-finished product.

 

Quality Assurance System of ZYS silicon nitride ceramic balls:

Use laser confocal microscope and ultrasonic scanning microscope for particle size analysis, impurity content analysis, oxygen and nitrogen content analysis, phase composition analysis.
 

Performance testing of ZYS silicon nitride ceramic balls:

Density, hardness, vibration value, crushing load, fracture toughness.

 

Product features of ZYS silicon nitride ceramic balls:

I. Excellent friction performance

1. Since the affinity of steel/ceramic matching is lower than that of steel/steel, when the lubricating film is not formed well or lacks lubrication, the lower affinity can effectively reduce the risk of adhesive friction.

2. Due to the high hardness of the ceramic ball, in the case of severe friction, the ceramic ball has good dimensional and shape accuracy retention and repairability to the groove to ensure the bearing running.

 

II. Small spin-to-roll ratio

Compared with steel bearings, the spin-to-roll ratio of ceramic ball bearings is about 30% lower, indicating that ceramic ball bearings have better contact conditions and lower spin friction.

 

III. Low temperature rise

Less heat; Small deformation; Low coefficient of friction; Small centrifugal force and gyro torque.

 

Item		Materials class
		I		II	III
Property	Bending strength σ3.40 (Mpa)		900	800	600
	Crushing load ratio (%)		35	35	30
	Hardness (HV10)		1580	1480	1380
	Fracture toughness (Mpa.m^1/2)		6.0	5.0	5.0
Maximum limit of microstructure	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
Maximum amount of inclusions  per square centimeter of cross section	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

 

Application of Si3N4 ceramic ball
	G3	G5	G10, G16	G20, G28, G40
Class I	High speed power equipment	Main drive bearing
Class II		Vacuum equipment,  high speed instrument,  mechanical devices,	Motor	Testing ball, separating ball
Class III			Sport, entertainment,  food processing	Mechanical devices

Si3N4 ceramic ball specifications
Nominal diameter of  ceramic ball		Nominal diameter of ceramic ball		Nominal diameter of  ceramic ball
mm	in	mm	in	mm	in
0.794	1/32	0.8		1
1.588	1/16	2		2.381	3/32
2.5		3		3.969	5/32
4		4.5		4.762	3/16
5		5.5		5.556	7/32
5.953	15/64	6		6.35	1/4
6.5		6.747	17/64	7
7.144	9/32	7.5		7.938	5/16
8.731	11/32	9.525	3/8	11.112	7/16
12.303	31/64	12.7	1/2	13.494	17/32
14.288	9/16	15.081	19/32	15.875	5/8
19.05	3/4	25.4	1	31.75	1 1/4

9Cr18, 9Cr18Mo stainless steel ball

9Cr18 is high carbon and high chromium martensite stainless bearing steel. After quenching, it has high hardness and wear resistance, high dimensional stability, generally used after quenching and tempering.
9Cr18Mo has the same characteristics and application as 9Cr18 steel, but has higher hardness and stability after quenching. Molybdenum can increase the passivation effect of stainless steel.
 

9Cr18, 9Cr18Mo material chemical composition
Steel grade	Carbon	Manganese	Silicon	Chromium	Nickel	Copper	Sulfur	Phosphorus	Molybdenum
Stainless steel 9Cr18	0.90/1.00	≤0.70	≤0.80	17.0/19.0	≤0.60		≤0.030	≤0.030
Stainless steel 9Cr18Mo	1.00/1.10	≤0.80	≤0.50	16.0/18.0			≤0.030	≤0.030	0.40-0.70

9Cr18, 9Cr18Mo material mechanical properties
Heat treatment	σb Mpa	σs %	Ψ%	HRC/HBW
Quenching and tempering state	---	---	---	≥58 HRC
Annealing state	755	14	27.5	230-240 HBW

9Cr18, 9Cr18Mo High carbon chromium stainless steel ball specifications
Nominal diameter of steel ball		Nominal diameter of steel ball		Nominal diameter of steel ball
mm	in	mm	in	mm	in
0.5		0.6		0.794	1/32
0.8		1		1.588	1/16
2		2.381	3/32	2.5
2.778	7/64	3		3.175	1/8
3.5		3.969	5/32	4
4.5		4.762	3/16	5
5.159	13/64	5.5		5.953	15/64
6		6.35	1/4	6.5
6.747	17/64	7		7.144	9/32
7.5		7.938	5/16	8
8.5		9		9.525	3/8
10		11.112	7/16	12
12.303	31/64	12.7	1/2	13.494	17/32
14.288	9/16	15.081	19/32	15.875	5/8
16.669	21/32	17.462	11/16	18.256	23/32
19.05	3/4	20.638	13/16	22.225	7/8

ZrO2 ceramic ball

ZrO2 ceramic has the features of high hardness, high strength, high toughness, high rigidity, high wear resistance, self-lubricity. At the same time, it is used as valve ball in petrochemical , papermaking, metallurgy, electroplating, etc.

ZrO2 ceramic ball specifications
Nominal diameter of ceramic ball		Nominal diameter of ceramic ball		Nominal diameter of ceramic ball
mm	in	mm	in	mm	in
0.5		0.6		0.794	1/32
0.8		1.588	1/16	2.381	3/32
2.5		2.778	7/64	3.175	1/8
3.5		3.969	5/32	4
4.5		4.762	3/16	5
5.159	13/64	5.5		5.953	15/64
6		6.35	1/4	6.5
6.747	17/64	7		7.144	9/32
7.5		7.938	5/16	8.5
9.525	3/8	10		11.112	7/16
12.303	31/64	12.7	1/2	13.494	17/32
14.288	9/16	15.081	19/32	15.875	5/8
16.669	21/32	17.462	11/16	18.256	23/32
19.05	3/4	20.638	13/16	22.225	7/8

Detailed Photos

 

 

Company Profile

About ZYS
Luoyang Bearing Research Institute Co., Ltd. is a hightech enterprise specializing in the development of "highrank, precise, advanced, unique,
special" bearing products for the key units in various fields of national economic construction. Its predecessor, Luoyang Bearing Research Institute, was established in 1958. It is the only state level comprehensive research institute in China's bearing industry. In 1999, it entered China National Machinery Industry Group Co., Ltd. and transformed into a science and technology enterprise.
We focus on developing high performance bearing products for key units of national economic construction. We perform batch production of
various highrank bearing products and components with inner diameter of 0.6mm to outer diameter of 6.8m. We are mainly engaged in the research, development, production and sales of precision bearing, special bearing, highspeed machine tool spindle, bearing special equipment, bearing testing instruments, bearing testing machine and bearing special materials, which are widely used in the fields of machine tools, wind power generation, mine metallurgy, petrochemical, medical equipment, automobiles and rail transit, construction machinery, intelligent manufacturing services, etc.
We have total assets of 2.06 billion RMB, own one research and development center, three industrial bases and cover an area of more than 47
hectares. We have advanced bearing manufacturing equipments and world first class testing equipments and have solid strength in manufacturing, measuring and testing of bearing and related components with high precision and high reliability. We have more than 380 technical staff of bearing related disciplines, thus we maintain a leading position in the aspects of bearing design, basic theoretical research, lubrication technology, metallic and non-metallic materials, testing and industry standards.
 

 

Our Advantages

ZYS Advantage
Many scientific research centers, laboratory and service agencies are set in our company, including National Bearing Quality Supervision and
Inspection Center, National Bearing Accreditation Laboratory, Industrial (Rolling Bearing) Product Quality Control and Technical Evaluation
Laboratory, National Rolling Bearing Standardization Technical Committee, ISO/TC4 Domestic Technology Responsible Unit, China Bearing
Industry Association Technical Committee, Machinery Industry Occupational Skill Identification Bearing Industry Subcenter, National Rolling Bearing Industry Technology Innovation Strategic Alliance, High end Bearing Tribology Technology and Application NationalLocal Joint Engineering Laboratory, State Key Laboratory of Shield Machine and Boring Technology (Bearing), Machinery Industry Highspeed Precision Bearing Engineering Research Center, Henan Province Machine Tool Spindle Unit Engineering Research Center, Henan Province High Performance Bearing Technology Key Laboratory, National Postdoctoral Research Workstation, Henan Province Bearing Generic Technology Academician Workstation, State Intellectual Property Office Patent Exchange Station and so on. We have so far achieved 908 major scientific research achievements, among which there are 31 awards of National Invention Awards and National Science and Technology Progress Awards, and 234 awards of provincial scientific and technological achievement awards.We have attained 792 granted patents, among which there are 277 patents for inventions. In addition, we established and revised the bearing industry technical standards for over 670 times, and also issued 457 volumes of "Bearing" magazine.

Glory
Top 200 most promising companies of China in Forbes
Top 500 in China Machinery Industry
Excellent Enterprise with China Well-know Trademark
High-performance Bearings Laboratory
State Quality Supervision and Testing Center for Bearing
ISO/TC4 China Secretariat
The Research Center for High-speed Precision Bearing Engineering in Machinery Industry...

ZYS MANUFACTURING CAPACITY

ZYS Quality assurance

Exhibition

 

ZYS bearing products

Contact us

Address: No. 1 Jilin Road, Luoyang City, Henan, Province, China.
Zip Code: 471039
Website: chinazys.en.made-in-china.com