High Precision Silicon Nitride Si3n4 Ceramic Ball Bearing

• Customization: Available
• Feature: Good Acid Resistance, Good Mechanical Strength, Long Time Materials
• Refractoriness (℃): 1580< Refractoriness< 1770
• Model NO.: HKK32
• Shape: Bearing
• Type: Heat-Resistant Material
• Name: Good Thermal Conductivity Silicon Nitride Ceramic
• Color: Black
• Size: Customised
• Usage: Bearing
• Surface Treatment: Polishing
• Max. Working Temperature: 1000°C
• Density: 3.25g/cm3
• Machining Method: Grinding
• OEM: Accept
• Keywords: Silicon Nitride Ball Bearing
• Material: Silicon Nitride
• Transport Package: Standard Export Cartons/Wooden Box/Tray
• Specification: standard or customized
• Trademark: OEM
• Origin: Jiangsu, China
• Production Capacity: 5000/Month

Product Description

Product Description

Silicon Nitride Ceramic bearing

Silicon nitride (Si3N4) bearings are advanced precision rolling bearings that use silicon nitride ceramic as the primary material for rolling elements (balls or rollers). 

Advantages

They are available in two main configurations: hybrid ceramic bearings (steel rings with silicon nitride rolling elements) and full ceramic bearings (both rings and rolling elements made of silicon nitride). This advanced ceramic material has emerged as an extremely promising solution for high-performance bearing applications, offeringsignificant advantages over conventional steel bearings.

·High-Speed Capability:DN values of 2–3 million·Exceptional Durability:exhibit 2–5 times longer service life compared to conventional steel bearings.
·Corrosion and Wear Resistance: The material is chemically inert and resists acids, alkalis, and humid environments where steel
bearings would corrode.
·Electrical Insulation:(10¹⁴ Ω·cm)

Applications

* Aerospace: Aircraft engine mainshaft bearings, turbine shaft bearings, and safety-critical applications requiring high reliability
 * High-Speed Machine Tools: CNC spindles and grinding spindles where precision and speed are paramount
 * Electric Motors: VFD-driven motors, EV traction motors, and generators requiring electrical insulation
 * Renewable Energy: Wind turbines where high stresses demand advanced bearing materials
 * Chemical Processing: Pumps and equipment handling corrosive media 
 * Vacuum and Semiconductor: Non-magnetic, low-outgassing operation in clean environments

Technical Specifications

(Custom configurations available upon request.)

Item	gas pressure sintering	hot pressing sintering	reactive sintering	pressureless sintering
Rockwell hardness	≥75HRA	-	>80HRA	91-92HRA
Volume density	3.25g/cm3	>3.25g/cm3	1.8-2.7g/cm3	3.0-3.2 g/cm3
Dielectric constant	-	8.0( @ 20℃, 1 MHz)	-	-
electric volume resistivity	10^14 Ω·cm	10^8Ω·cm	-	-
breaking tenacity	6-9 MPa·m¹/²	6-8MPa·m¹/²	2.8MPa·m¹/²	5-6MPa·m¹/²
Elasticity modulus	300-320GPa	300-320GPa	160-200GPa	290-320GPa
thermal expansivity	3.1-3.3m/K ×10^-6 /℃	3.4m/K×10^-6 /℃	2.53m/K×10^-6 /℃	600m/K×10^-6 /℃
thermal conductivity	15-20W/(m·K)	34W/(m·K)	15W/(m·K)	-
weibull modulus	12-15	15-20	15-20	10-18
Note:The above data is only for your reference.

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Packaging & Shipping

Reliable Fragile Product Packaging & Comprehensive Shipping Protection

Targeting the fragile, high-precision characteristics of industrial ceramic and quartz products, we adopt standardized export-grade shockproof packaging and professional global transportation solutions. Finished products go through independent wrapping, anti-collision foam filling and thickened carton or wooden box reinforcement, greatly reducing the risk of breakage, scratch and deformation during transit. We support customized brand packaging, exclusive shipping marks and standardized export packaging standards, and adapt to multiple transportation modes including sea freight, air freight and international express. With mature logistics docking experience and full-link cargo protection measures, we aim to improve the safety and integrity of product delivery for global industrial customers.

R&D Strength & Mature Project Experience

Independent R&D Innovation + Verified Similar Overseas Project Cases

We have independent professional R&D teams and laboratories capable of continuous innovation, structural optimization and process improvement, to develop customized products tailored to international market needs. Our products are exported to more than 130 countries, and we have established cooperative partnerships with over 100 well-known domestic and foreign universities. We have also maintained successful cooperation with Fortune 500 enterprises.
We boast extensive overseas project experience and have long provided services to worldwide clients covering similar target markets, customer groups and product specifications. Our well-established, replicable project cases comply with major international standards.

Stable Capacity & Fair Pricing

Sufficient & Stable Output Capacity + Standardized              Market-oriented Quotation

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Full-Cycle Service & Long-Term Trusted Partner

One-stop Full-lifecycle Export Service + Sustainable & Stable Enterprise Operation

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FAQ

Q1: Can you provide exclusive customized solutions for special project demands? 
A1: Yes. In addition to conventional OEM and ODM customization, we can develop exclusive product structures, adjust technical parameters and optimize solutions according to special project standards, regional industry specifications and personalized buyer requirements, providing one-to-one customized technical support.
 
Q2: Do you support third-party factory inspection and product random testing? 
A2: We support on-site factory audit and offline random inspection by buyers or authoritative third-party institutions. Our standardized production process, complete quality records and standardized management system can comply with mainstream international factory inspection standards.
 
Q3: How do you ensure on-time delivery for bulk orders? 
A3: We have a scientific production scheduling system and sufficient material reserve chain. According to order quantity and delivery cycle, we will formulate a detailed production plan, arrange special personnel to track progress in real time, and effectively avoid delivery delays to ensure stable and punctual shipment of bulk and urgent orders.
 
Q4: Why is your factory price more stable than trading companies? 
A4: As a direct manufacturer, we control all links from raw material procurement, production processing to finished product output. There is no intermediate markup, and we can adjust costs according to long-term cooperative orders, maintaining stable and transparent pricing for long-term strategic partners.
 
Q5: What customized service items can you support besides product structure? 
A5: Besides structural size and precision tolerance customization of industrial ceramic and quartz products, we support personalized services including custom deep processing, surface treatment, laser marking, custom packaging and technical document customization to meet different industrial and brand standards.