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Basic Info.
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
| 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.m1/2) | 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 |
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.
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 
ZYS bearing products
Address: No. 1 Jilin Road, Luoyang City, Henan, Province, China.
Zip Code: 471039
Website: chinazys.en.made-in-china.com