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Material: Synthetic corundum (Ruby / Sapphire / Al₂O₃) | Mohs Hardness: 9 | Origin: China | Korea Sales / Technical Support: METICULAB (Korea) | ISO 9001 · Precision Manufacturing
The TAOMSUN high-hardness conical jewel bearing is a key support component for instruments and precision equipment. It is manufactured from synthetic corundum (ruby / sapphire) with a Mohs hardness of 9 – second only to diamond – offering excellent wear resistance, high-temperature tolerance and mechanical strength. The conical structure distributes load more evenly, improving load-bearing stability; precision taper-angle machining ensures close fit with mating parts, enhancing positioning accuracy and reducing running deviation. It suits high-precision, high-reliability applications such as precision instruments, industrial automation, aerospace and medical devices.
🔍 Key Feature: Compared with flat-end or ball-end structures, the conical design distributes load more evenly and provides superior load-bearing stability, making it ideal for high-load, high-precision axial (thrust) support applications.

Bearing overview

Conical structure

Ruby / sapphire materials

Precision taper angle

Custom dimensions

| Product Name | High-Hardness Conical Jewel Bearing |
| Brand / OEM | TAOMSUN (Overseas partner: METICULAB) |
| Origin | China |
| Korea Sales / Technical Support | METICULAB (Korea) |
| Material | Synthetic corundum (Ruby / Sapphire / Al₂O₃) – single crystal |
| Mohs Hardness | 9 (second only to diamond) |
| Surface Roughness (Ra) | ≤ 0.01 μm (ultra-precision finishing) |
| Friction Coefficient (vs. Steel) | ≈ 0.14 (low-friction operation) |
| Outer Diameter Range | Φ0.8 – 6.0 mm (customizable) |
| Thickness Range | 0.3 – 2.0 mm |
| Bore Diameter Range | Φ0.15 – 3.0 mm |
| End Face Shape | Conical – even load distribution, precise positioning |
| Temperature Range | Excellent high-temperature tolerance (suited to complex thermal environments) |
| Mechanical Strength | High elastic modulus · excellent impact resistance |
| Quality System | ISO 9001 · Precision Manufacturing |
| Customization Service | Dimensions, tolerances and taper angle can be customized on request |
Q: What are the advantages of the conical structure compared with flat-end or ball-end structures?
A: The conical structure distributes load more evenly and effectively improves load-bearing stability; precise taper-angle machining ensures close fit with mating parts and higher positioning accuracy, especially suitable for high-load axial (thrust) support applications.
Q: What is the difference between ruby and sapphire bearings?
A: Both ruby and sapphire are synthetic corundum (Al₂O₃) with identical mechanical and chemical properties. The color difference comes from trace doping elements – ruby contains chromium, while sapphire is a pure crystal or contains other dopants. Both offer Mohs 9 hardness with the same performance.
Q: What is the friction coefficient of this bearing?
A: Approximately 0.14 against steel, which effectively reduces energy loss and extends equipment service life.
Q: What are the standard size ranges?
A: Outer diameter Φ0.8–6.0 mm, thickness 0.3–2.0 mm, bore Φ0.15–3.0 mm. The taper angle can be customized on request.
Q: Can you customize non-standard dimensions or special taper angles?
A: Yes. TAOMSUN supports customization of non-standard dimensions and taper angles. Please provide CAD drawings or specification requirements, and we will provide a targeted quotation.
Q: What is the typical lead time for custom orders?
A: Standard stock products ship within 3–5 working days. Custom specifications usually take 2–4 weeks, depending on complexity and quantity.
TAOMSUN is a precision component manufacturer specializing in hard material machining and bearing technology. The company is certified under the ISO 9001 quality management system and focuses on synthetic ruby / sapphire bearings, precision shafts and high-performance mechanical components, serving the instrument, automation and aerospace industries. The core team brings decades of Japanese precision machining experience, ensuring outstanding quality and reliability of every product.
🌏 Overseas sales and technical support is provided by METICULAB™ (Korea).TAOMSUN Precision Bearing Components | 📧 Sales Inquiry taomsun@vip.163.com +86-13862625813 | 🌏 Overseas Sales / Technical Support METICULAB™ (Korea) choikyuc@gmail.com +82-10-3988-4813 💬 WhatsApp / KakaoTalk |
All TAOMSUN products are manufactured under the ISO 9001 quality management system. Specifications are typical values and may vary with custom configurations. For OEM/ODM customization, non-standard sizes or special taper angles, please contact our sales team. Overseas customers can contact METICULAB (Korea) for Korean / English technical consultation.
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