Main properities:
Are suitable for higher speeds and load capacities, as well as for higher ambient temperatures.
Processing Type:
Isostatic pressing → 1700-1850℃ gas pressure sintering
Typical Advantages:
Compared to bearing steel, its self-weight is 30%-40% of that of bearing steel. Its elastic modulus is 1.5 times higher than that of bearing steel
Main Appications:
Precision ceramic bearings for high-speed, high-precision, and high rigidity spindles can be provided.
Can also be applied in high-temperature equipment such as furnaces, plastic making, steel making, etc;
1.1 Product Basic Profile
Main Component:High-purity silicon nitride (Si₃N₄) ceramic powder, sintered into solid spherical rolling elements for high-speed bearing assemblies
Porosity:Near full dense compact structure after gas pressure sintering, internal void ratio below 0.01%, zero internal micro cavities
Shape Form:Mirror polished solid spheres, multiple sizes ranging from 1mm to 50mm as shown in the picture, precision grades from G3 to G10 available
1.2 Production Craft & Market Positioning
Processing Type:Isostatic pressing → 1700-1850℃ gas pressure sintering → multi-stage fine grinding & ultra-precision mirror polishing
Industrial Standard:Conform to ISO 3290 rolling bearing ball international standards, pass RoHS, REACH environmental certification
Core Positioning:High-performance ceramic rolling component replacing traditional steel balls, tailored for high-speed, high-temperature, anti-corrosion bearing working conditions
2. Core Characteristics
2.1 Low Density & Light Weight
Density Parameter:Material density 3.2-3.3 g/cm³, about 60% lighter than chrome steel balls of identical dimension
Dynamic Performance:Greatly cut centrifugal force under ultra-high-speed rotation, effectively reduce bearing heat accumulation and dynamic load
2.2 Excellent High Temperature Stability
Working Temperature Range:Stable long-term service at 250-450℃, short instant temperature resistance up to 800℃
Thermal Performance:Low thermal expansion coefficient, minimal dimensional deformation under sharp temperature changes
2.3 Chemical Inert & Electrical Insulation
Key Properties:Chemically inert material, resistant to acid, alkali, salt mist and lubricant corrosion; non-conductive insulation feature
Surface Precision:Mirror polished surface with ultra-low roughness, ultra-small spherical error, low rolling friction coefficient
2.4 High Hardness & Reliable Toughness
Hardness Index:Surface hardness HV1400-HV1600, far superior to bearing steel HRC60-HRC64
Toughness Feature:Gas pressure sintered silicon nitride avoids brittle cracking risks of alumina ceramic balls, strong impact resistance
3. Advantages of ceramic bearing ball
3.1 Support Ultra-High Rotational Speed
High-Speed Advantage:Light weight reduces raceway dynamic load, the DN value can reach 2-3 times of full steel bearing solutions
Energy Saving:Lower friction loss cuts equipment power consumption, extends service cycle of lubricating grease
3.2 Outstanding Wear Resistance & Longer Service Life
Anti-Wear Performance:Superhard ceramic surface lowers abrasion with bearing inner/outer rings, service life 3-5 times longer than steel balls
Anti-Oxidation:No rust or oxide abrasive particles generated in humid and corrosive working environments
3.3 Stable Running & Low Operation Noise
Vibration Control:Uniform spherical precision and light weight suppress running vibration, lower mechanical operation noise
High Rigidity:High elastic modulus maintains stable rolling clearance under heavy load, no plastic deformation
3.4 Strong Environmental Adaptability & Customization Support
Condition Adaptability:Fit high-temperature, humid, chemical mist, low-lubrication and dry oil-free running scenarios
Customization Support:Adjustable ball diameter, precision grade and surface finish according to customers’ equipment design demands
4. Application of ceramic bearing ball
4.1 High-Speed Precision Machine Tool Bearings
Core Application:Silicon nitride balls are widely used in high-precision bearings, seals, mechanical parts, and other fields. In the field of bearings, silicon nitride balls have high precision, high hardness, and high wear resistance, which can significantly improve the service life and accuracy of bearings. In the field of seals, silicon nitride balls have good corrosion resistance and high temperature stability, and can be used for sealing in various harsh environments. In the field of mechanical parts, silicon nitride balls can be used to manufacture various high-precision and high hardness parts, such as bearing sleeves, shaft sleeves, etc.
Working Demand:Meet ultra-high-speed spindle rotation requirements, improve machining accuracy and reduce spindle heat buildup
4.2 High-Speed Motor & New Energy Power Equipment
Usage Scenario:Applied to high-speed drive motor bearings, wind power generator bearings and vacuum pump rotating components
Environment Adaptation:Suitable for long-term continuous operation under high temperature and variable load conditions
4.3 Automotive High-Performance Transmission Components
Matching Equipment:New energy vehicle high-speed motor bearings, performance racing transmission bearing assemblies
Value Output:Lighten vehicle transmission weight, boost high-speed stability and extend maintenance intervals
4.4 Aerospace & Semiconductor Precision Equipment
High-End Matching:Semiconductor vacuum equipment bearings, aerospace auxiliary rotating parts, precision instrument bearings
Special Demand:Meet strict requirements of corrosion resistance, insulation and low impurity pollution for high-end precision manufacturing
5. Technical Data
| gas pressure sintering | hot pressing sintering | reactive sintering | pressureless sintering | |
| Rockwell hardness (HRA) | ≥75 | - | > 80 | 91-92 |
| volume density(g/cm3) | 3.25 | > 3.25 | 1.8-2.7 | 3.0-3.2 |
| Dielectric constant (εr20℃, 1MHz) | - | 8.0(1MHz) | - | - |
| electric volume resistivity(Ω.cm) | 10¹⁴ | 10⁸ | - | - |
| breaking tenacity (Mpa m1/2) | 6-9 | 6-8 | 2.8 | 5-6 |
| Elasticity modulus (GPa) | 300-320 | 300-320 | 160-200 | 290-320 |
| thermal expansivity (m/K *10⁻⁶/℃) | 3.1-3.3 | 3.4 | 2.53 | 600 |
| thermal conductivity (W/MK) | 15-20 | 34 | 15 | - |
| weibull modulus (m) | 12-15 | 15-20 | 15-20 | 10-18 |
Development History
Patents and certification
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