Complaint
ZYS Bearing Rolling Elements Super precision Grade 5 silicon nitride balls 1.588mm
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.
ZYS 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 | |
| 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 |
| The nominal diameter of bearing ball | The nominal diameter of bearing ball | The nominal diameter of bearing ball | |||
| mm | in | mm | in | mm | in |
| 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
ZYS Ceramic ball workshop:
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ISO/TC4 China Secretariat
The Research Center for High-speed Precision Bearing Engineering in Machinery Industry
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Zip Code:471039
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