High-Reliability Zirconia Bearings for Extreme Conditions
Zirconia bearings are designed to serve mission-critical applications in aerospace, renewable energy and precision equipment where metal bearings cannot survive. Manufactured with high-grade zirconia ceramic, they provide higher wear resistance, corrosion resistance, and performance under high and low temperatures and electrical insulation and non-magnetism. Self-lubricating feature avoids the risk of contamination, and thus they are ideal for high-purity applications. Newthink zirconia bearings minimize maintenance costs, enhance equipment life and offer uniform performance in harsh operating conditions.
Zirconia Bearing Solutions for Demanding Industries
Crafted to meet diverse industrial requirements, Newthink’s zirconia bearings deliver precision, reliability and toughness. Find out more about specialized designs appropriate for industrial requirements.
Made of silicon carbide or silicon nitride and zirconia, these bearings withstand ultra-high temperatures of over 1000 ℃.
With stainless steel or carbon steel rings and zirconia rolling elements. Combine ceramic hardness with metal toughness.
Made entirely of zirconia ceramic. Deliver corrosion resistance, insulation, and reliability in medical, chemical and cleanroom settings.
High-speed, low-friction bearings. Best for critical components of high-speed spindles, medical and semiconductor equipment.
Features and Applications of Zirconia Bearing
Zirconia bearings are reliable solutions for industry segments that demand stability, precision and durability.
With hardness HV≥1250, zirconia bearings possess 5–10 times the wear life of steel, with permanent performance.
With flexural strength of up to 1200 MPa, they are impact-resistant and reduce the fracture hazards of traditional ceramics.
At only 45% the steel density, they reduce inertia, optimizing efficiency and energy conservation in rotating equipment.
Acid- and alkali-resistant. Superior to stainless steel, providing long life to the chemical and pharmaceutical industry.
Survive continuous operating temperatures up to 550 ℃ and short-term up to 800 ℃. Maintain strength in hostile thermal conditions.
With volume resistivity above 1013 Ω·cm, zirconia bearings eliminate current damage in motors and high-voltage equipment.
Completely anti-magnetic, they prevent interference in MRI systems, semiconductor tools, and precision measurement instruments.
Certified safe for medical use, zirconia bearings are suitable for implants, dental drills, and equipment requiring human contact.
Why Choose Newthink Zirconia Bearing?
Newthink supplies expert solutions for zirconia bearings to support the most demanding industrial challenge, maintaining reliability, efficiency and performance in the long term.
Newthink provides cost-effective zirconia bearings with improved durability and reliable performance through lean manufacturing techniques and advanced ceramic technology.
Our bulk production facilities and advanced equipment allow us to process bulk international orders in a timely manner with stable quality and reliable delivery schedules.
We produce and custom-make zirconia bearings in specially designed sizes and tolerances according to specific customer specifications and application requirements.
ISO-certified, every zirconia bearing is subjected to rigorous testing for strength, precision, and durability to assure consistent quality across all lots of production.
Zirconia Bearing Production Workshop
Newthink’s zirconia bearing production workshop is equipped with advanced ceramic processing technology and precision inspection systems to guarantee stability and accuracy. With 14+ years of expertise, we ensure reliable quality, strict dimensional control, and consistent performance that meet the highest industry standards. We will provide zirconia bearings that deliver reliable performance in the most demanding industrial conditions.
Zirconia Bearing with Excellent Wear Resistance for Longer Service Life
Zirconia bearings exhibit superior hardness (11.5–13.5 GPa) and longer wear life compared to typical steel bearings. Low friction coefficient of 0.08–0.12 minimizes energy loss and maximizes life, eminently suitable for harsh applications such as mining, machining and chemical processing ,where bearings are often replaced at high cost and disruption.
High-Performance Stability Zirconia Bearing in Extreme Temperatures
Zirconia bearings are capable of continuous operation at 550℃ and withstand a maximum of 800℃ transiently without losing their strength and stability even under severe thermal stress. Low in thermal expansion coefficient (9.6–10.2×10-6/℃), zirconia bearings ensure low cracking or deformation due to an unforeseen change in temperature. Ideal for long-term dependability in aerospace, automotive and high-speed equipment uses.
Zirconia Bearing with Corrosion Resistance for Severe Applications
Zirconia bearings are resistant to acids and bases. They are corrosive at <0.02 mg/cm²/day in nitric acid, <0.01 mg/cm²/day in sodium hydroxide at 90°C. The high chemical stability dissuades rust and contamination. They are suit for chemical processing, medical and food-grade applications where long-term reliability are necessary.
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Zirconia Bearing Technical Specifications
Explore key properties of Newthink zirconia ceramic bearings, ensuring high performance, durability and reliable application.
- Datasheet
| Category | Item | Unit | Typical Value |
| Physical Properties | Density | g/cm³ | 6.00–6.05 |
| Color | – | White | |
| Crystal Grain Size | μm | 0.2–0.5 | |
| Mechanical Properties | Flexural Strength | MPa | 800–1200 |
| Compressive Strength | MPa | 2000–2500 | |
| Elastic Modulus | GPa | 200–220 | |
| Fracture Toughness | MPa·m1/2 | 6.0–9.0 | |
| Vickers Hardness | GPa | 11.5–13.5 | |
| Rockwell Hardness (HRA) | – | 85–90 | |
| Friction & Wear Properties | Friction Coefficient | – | 0.08–0.12 (Dry Friction) |
| Wear Rate | mm³/(N·m) | ≤1×10-7 | |
| Thermal Properties | Maximum Operating Temperature (Continuous) | ℃ | 550 (short-term up to 800) |
| Thermal Expansion Coefficient (20–400℃) | 10-6/℃ | 9.6–10.2 | |
| Thermal Conductivity | W/(m·K) | 2.0–3.0 | |
| Thermal Shock Resistance (ΔT) | ℃ | 250 (Water Cooling) | |
| Electrochemical Properties | Volume Resistivity (20℃) | Ω·cm | ≥1013 |
| Dielectric Strength | kV/mm | 15–20 | |
| Corrosion Resistance (20% HNO3, 90℃) | mg/cm2/day | <0.02 | |
| Corrosion Resistance (20% NaOH, 90℃) | mg/cm2/day | <0.01 |
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Compared to steel bearings, zirconia bearings possess benefits over steel bearings that enable them to be an ideal choice in some applications.
① Zirconia is approximately 23% lighter than steel. It can lead to improved performance in rotating parts.
② Zirconia bearings are extremely hard at 1250-1400 HV, 50% more wear-resistant than steel bearings. It prolongs the lifespan of equipment.
③ Zirconia bearing has a very low friction coefficient of ≤ 0.15. It has better self-lubricating qualities, lowering maintenance expenses.
④ Zirconia bearings are non-magnetic, and have corrosion resistance and can withstand harsh chemical environments, such as concentrated alkalis and acids.
⑤ Zirconia bearings are made for high-speed applications. Their low density and low friction allow for a DN value of up to 2×106 mm·r/min. By comparison, conventional steel bearings tend to be hot at elevated speeds with a typical DN value of 1.2×106 mm·r/min.
Zirconia bearings find applications that need corrosion-resistant and electrically insulating materials. Zirconia bearings have a tolerance of moderate temperatures (up to 550℃) and offer an acceptable compromise between performance and cost.
Silicon Nitride bearings are the better option for more severe conditions. They are used in preference for ultra-high-temperature operation (above 800℃) and ultra-high-speed performance. Their very high wear resistance makes them an excellent option for heavy-duty machinery like sand mills.
The method depends on whether you are working with a full ceramic or a hybrid ceramic bearing.
Do not apply any direct force with energy greater than 0.1J since it could lead to phase transition or cracking of the zirconia. Never directly hit the ceramic surface using a steel hammer to prevent scratches caused by the hardness difference. Ensure that the dynamic load is below 50% of the material’s bending strength and the local stress is under 200 MPa. Use a diffuser pad on the contact surface to distribute force evenly.
Removal Methods
① Thermal Expansion: Use the difference in thermal expansion coefficients of ceramic and metal.
② Cold Shrinking: Freeze the metal inner ring with liquid nitrogen to -196℃ to create a gap of 0.05-0.1mm.
③ Hot Expansion: Heat the metal outer ring to 250℃ with a hot air gun, maintaining the ceramic area temperature below 100℃.
④ Hydraulic Puller: Place the jaws of the puller over the inner ring and apply the pressure in a stepwise procedure at a rate not exceeding 5 MPa/min.
Our zirconia bearings possess the strength to run short-term in temperatures up to 800℃. For long-lasting reliability and optimal performance, we recommend that they run continuously in temperatures below 400℃. Zirconia bearings have much better corrosion resistance to the majority of concentrated acids (except hydrofluoric acid), concentrated alkalis, salt spray and organic solvents. Their room temperature corrosion rate is less than 0.1mg/cm²/year, which means sustaining endurance in harsh chemical environments.
Our zirconia bearings are ideal for mild temperature (≤550℃) and highly corrosive conditions. We aim to provide superior quality, high-performance ceramic solutions to help you succeed in your business. If you require more information regarding special application environments or selecting the correct material, feel free to contact us.
