Product Description
In the fast-paced world of high-speed automotive engineering, every component counts. Among these, bearings play a pivotal role in ensuring smooth operation and longevity of the vehicle. Enter racing ceramic balls made of silicon nitride, a game-changer in the realm of high-speed automotive bearings. These advanced ceramic balls are not just lighter and stronger but also offer unparalleled performance benefits, making them the preferred choice for automotive enthusiasts and professionals alike.
Silicon nitride (Si3N4) ceramic balls are renowned for their exceptional properties, which include high heat resistance, low friction, and remarkable durability. These features make them ideal for applications in demanding environments, such as high-speed automotive bearings. Unlike traditional steel bearings, silicon nitride ceramic balls are much lighter, reducing the overall weight and rotational mass, which translates into faster speeds and improved fuel efficiency.
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Lower Friction: Silicon nitride balls have a lower coefficient of friction compared to steel balls. This means they spin more freely, reducing energy loss and enhancing the vehicle's performance.
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Enhanced Durability: Ceramic balls are more resistant to wear and tear, offering up to ten times the lifespan of traditional steel bearings. This durability is crucial in high-speed applications where components are subjected to extreme stress.
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High Temperature Resistance: Silicon nitride can withstand higher temperatures than steel, making these balls suitable for high-performance automotive applications where heat build-up is a concern.
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Lightweight: Weighing 60% less than steel, these ceramic balls contribute to reducing the overall weight of the vehicle, leading to better acceleration and handling.
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Corrosion Resistance: Unlike steel, silicon nitride is highly resistant to corrosion, ensuring longevity even in harsh environments.
The application of silicon nitride ceramic balls in high-speed automotive bearings is transforming the industry. These bearings are used in various components, including:
- Wheel Hubs: The reduced weight and friction of ceramic balls enhance the wheel's rotational efficiency, improving speed and fuel economy.
- Transmission Systems: Silicon nitride bearings in transmissions provide smoother gear shifts and reduce energy loss, leading to more power reaching the wheels.
- Electric Motors: In electric vehicles, these bearings improve motor efficiency and extend the service life by minimizing wear and heat generation.
| Property | Silicon Nitride (Si3N4) | Steel (440C) | Zirconia (ZrO2) | Alumina (Al2O3) |
| Density (g/cm³) | 3.2 | 7.8 | 6.0 | 3.9 |
| Hardness (HV) | 1,400–1,600 | 700–900 | 1,200–1,300 | 1,500–1,800 |
| Fracture Toughness (MPa·m½) | 6–7 | 15–20 | 7–10 | 3–4 |
| Compressive Strength (GPa) | 2.5–3.5 | 2.0–2.5 | 2.0–2.3 | 2.0–3.0 |
●Description:
Silicon Nitride Ceramic Ball is the most ideal bearing ball for bearing applications, due to the excellent properties of silicon nitride ceramics, it has many irreplaceable advantages comparing to traditional steel materials, such as: high mechanical strength, low wear loss, good self-lubrication, low density, high corrosion resistance, good electrical insulation etc.
Therefore, Silicon Nitride Balls are mostly used for some harsh working conditions: high speed/super speed bearings, high precision bearings, bearings in vacuum, high/low temperature bearings.
Moreover, Silicon Nitride Ceramic Balls can also used as valve ball or measurement balls in chemical pumps/high temperature pumps/metdering pumps.
●Physical Properties:
| Chemical Composition: | Si3N4≥95% |
| Bulk Density: | 3.2±0.05g/cm3 |
| Elastic Modulus: | 350GPa |
| Hardness Vickers: | 1870HV |
| Bending Strength: | 780MPa |
| Fracture Toughness: | 7.2MPa·m1/2 |
| Thermal Expansion Coefficient: | 3.2 10-6/K |
| Thermal Conductivity: | 25W/(m·K) |
● Ball Sizes/Grade :
| Size (mm) | Φ0.8-180 |
| Grade | Vdws | SPH | Vdwl | Ra |
| G3 | 0.05-0.08 | ≤0.08 | <0.13 | 0.01 |
| G5 | 0.08-0.13 | ≤0.13 | <0.25 | 0.014 |
| G10 | 0.15-0.25 | ≤0.25 | <0.5 | 0.02 |
| G16 | 0.2-0.4 | ≤0.4 | <0.8 | <0.025 |
| G20 | 0.3-0.5 | ≤0.5 | <1 | <0.032 |
| G100 | 0.4-0.7 | 0.4-0.7 | <1.4 | <0.0105 |
Factory equipment
Exhibition & Partner
Case
Ship to South Korea
Ship to Spain
FAQ
1. What sizes and tolerances are available?
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Diameter range: 0.5mm to 50mm (custom sizes possible).
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Sphericity: As low as 0.1µm (Grade 5 for ultra-precision bearings).
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Surface finish: Ra < 0.02µm (mirror polish for low friction).
2. Are silicon nitride balls FDA-approved for medical use?
Yes! Si3N4 is biocompatible (ISO 6474-1) and used in spinal implants, dental devices, and joint replacements due to its antibacterial properties.
3. How do I choose the right Si3N4 balls for my application?
Consider:
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Load & speed requirements (dynamic/static stress).
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Temperature range (Si3N4 excels in high heat).
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Chemical exposure (resistant to most acids/alkalis).
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Electrical insulation needs (non-conductive).
Product Tags:
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25.4mm Ceramic Silicon Nitride Balls Mill Media For High Speed Automotive Bearings Images
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