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High Precision Silicon Nitride Ceramic Bearing Balls | Si₃N₄
Our Silicon Nitride Ceramic Bearing Balls (Si₃N₄) set the standard for high-performance precision components. Engineered for the most demanding environments, these ceramic balls outperform traditional steel in every key metric. Whether deployed in high-speed bearings, corrosive pump valves, or vacuum applications, silicon nitride delivers exceptional durability, reliability, and efficiency.
Key Features & Benefits
Silicon nitride's unique material properties provide significant engineering advantages over traditional steel bearings:
Exceptional Hardness & Strength: With a compressive strength exceeding 1500 MPa and a Vickers hardness of 15-16 GPa, these balls resist indentation and surface fatigue, ensuring a long operational lifespan under heavy loads.
Superior Wear & Temperature Resistance: Excellent wear resistance and thermal stability allow for continuous operation in high-temperature environments where steel bearings would fail.
Inherent Self-Lubrication: The material's low coefficient of friction provides dry lubrication, making it ideal for vacuum and cleanroom applications where traditional lubricants cannot be used.
Lightweight for High-Speed Performance:59% lighter than steel, silicon nitride balls significantly reduce centrifugal force and skidding in high-speed spindles and aerospace bearings. This enables faster acceleration, higher RPMs, and lower operating temperatures.
High Rigidity & Reduced Deformation: With an elastic modulus 44% higher than steel, these balls offer superior stiffness. This minimizes elastic deformation under load, ensuring sub-micron precision in machine tools and precision instruments.
Non-Magnetic & Electrically Insulating: Perfectly non-magnetic and possessing high electrical resistivity (10¹⁴ Ω*cm), they are essential for MRI equipment, railway traction motors, and other applications requiring electrical isolation to prevent arcing.
Outstanding Corrosion Resistance: Inert to most chemicals and process media, they outperform stainless steel in acidic or corrosive environments, eliminating adhesive wear and contamination.
Thermal Shock Resistance: A low coefficient of thermal expansion ensures dimensional stability and resistance to cracking during rapid temperature fluctuations.
Typical Applications
The versatility of silicon nitride allows it to excel across a wide range of industries:
High-precision instrument and machine tool bearings
Vacuum and space-grade bearings
High-temperature furnace bearings
Precision ball screws and linear guides
Pumps & Valves
Valve balls for chemical processing pumps
Check valve balls in metering and dosing pumps
Bearings for downhole drilling and subsea equipment
Technical Specifications
Property
Value
Unit
Density
3.20 - 3.26
g/cm³
Apparent Porosity
0 - 0.1
%
Elastic Modulus
300 - 320
GPa
Compressive Strength
> 1500
MPa
Vickers Hardness (HV0.5)
15 - 16
GPa
Fracture Toughness
> 8.0
MPa*m^(1/2)
Bending Strength
> 700
MPa
Poisson's Ratio
0.25
-
Linear Expansion Coefficient
3.1 - 3.3
×10⁻⁶/°C
Weibull Modulus
11 - 13
-
Thermal Conductivity
20 - 25
W/(m*K)
Specific Resistivity
10¹⁴
Ω*cm
Grades & Availability
We supply Silicon Nitride bearing balls in a full range of precision grades, including G5, G10, G16, and G28. Available in standard and custom sizes to meet your exact specifications.
Contact our engineering team today to discuss your application requirements.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2017
Total Annual:
800-850
Employee Number:
60~70
Ecer Certification：
Verified Supplier
Founded in 2017, Kegu is a leading advanced materials developer based in China’s Xixian New District, Qinhan New City—strategically positioned near major transport links including the Xianyang East Expressway. With a registered capital of 35.5 million RMB (approx. 5 million USD), we o...
Founded in 2017, Kegu is a leading advanced materials developer based in China’s Xixian New District, Qinhan New City—strategically positioned near major transport links including the Xianyang East Expressway. With a registered capital of 35.5 million RMB (approx. 5 million USD), we o...
