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Customized Ruby Jewel Bearings (Al₂O₃) for Precision Instruments and Watch Movements

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December 05, 2025
Conexão de Categoria: Peças da safira
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#tubo da safira #rolamentos da safira #janelas da safira
Resumo: We show the practical steps and results so you can judge suitability quickly. This video demonstrates the manufacturing process and performance testing of Customized Ruby Jewel Bearings (Al₂O₃), showcasing their ultra-precision grinding and optical-grade polishing techniques. You'll see how these bearings deliver exceptional wear resistance and low friction in precision instruments and watch movements.
Características do produto relacionadas:
  • Manufactured from synthetic corundum (Al₂O₃) doped with chromium for exceptional hardness and low friction characteristics.
  • Features Mohs hardness of 9 and surface roughness Ra < 0.3 nm through optical-grade polishing.
  • Operates across extreme temperature ranges from -200°C to +800°C with high dimensional stability.
  • Provides corrosion resistance against acids, alkalis, oxidation, and moisture for harsh environments.
  • Available in multiple precision geometries including spherical, conical, straight-hole, and ring-type bearings.
  • Supports customization with OD range 0.8-10 mm, height 0.6-5 mm, and bore diameter 0.05-3 mm.
  • Enables lubrication-free operation due to ultra-smooth crystal structure and minimal frictional loss.
  • Ideal for precision instruments, watch movements, aerospace navigation, and medical equipment applications.
FAQ:
  • Why is ruby used for precision bearings?
    Ruby provides extremely low friction, exceptional wear resistance, and long-term dimensional stability, making it far superior to metal bearings for precision applications.
  • Do ruby bearings require lubrication?
    In many applications, no lubrication is required because the polished crystal structure provides natural low-friction performance.
  • Are ruby and sapphire bearings the same?
    Yes, both are Al₂O₃ single crystals. Ruby contains chromium which gives it a red color, while sapphire is typically clear or blue.
  • Can ruby bearings work in harsh environments?
    Yes, they resist acids, alkalis, high temperature, humidity, and vibration, making them suitable for demanding applications.
  • Are jewel bearings suitable for high-speed micro-rotation?
    Yes, their low friction and micro-scale precision make them ideal for watch escapements, micro-motors, and sensitive instruments requiring high-speed rotation.
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