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Ruby Bearings Al₂O₃ Single Crystal for Precision Instruments and Meters

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August 26, 2025
Category Connection: Sapphire Parts
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Ruby bearings are a paradigm of human use of materials science to solve precision engineering challenges. Though small, they are indispensable "unsung heroes" in many high-end devices. With their extreme smoothness, exceptional hardness, superior stability, and nearly wear-free longevity, they guard the accuracy and reliability of the macroscopic world at a microscopic scale. As technology advances toward greater precision and miniaturization, ruby bearings and their technical variants (e.g., micro-hole jewel nozzles, sapphire windows) will continue to play an irreplaceable role.
Tags:
#sapphire tube #sapphire bearings #sapphire windows
Brief: Discover the precision and durability of Ruby Bearings Al₂O₃ Single Crystal, designed for precision instruments and meters. These bearings, made from synthetic sapphire, offer exceptional hardness, low friction, and long service life, making them ideal for high-accuracy applications.
Related Product Features:
  • Extreme hardness with a Mohs hardness of 9, second only to diamond.
  • Very low coefficient of friction for smooth and responsive operation.
  • Excellent wear resistance ensures long-term geometric accuracy.
  • Outstanding chemical inertness, resistant to strong acids and alkalis.
  • Good thermal stability with a high melting point of 2050°C.
  • High rigidity provides stable and reliable support for precision instruments.
  • Electrical insulation properties advantageous for electronic devices.
  • Available in various design forms like through-hole and V-notch jewel bearings.
Faqs:
  • What are ruby bearings made of?
    Ruby bearings are made from synthetic sapphire (monocrystalline aluminum oxide, Al₂O₃), which is artificially grown to achieve extreme hardness and a perfectly smooth surface.
  • Why are jewels used in watches?
    Jewels (ruby bearings) are used in watches to drastically reduce friction at pivotal movement points, which minimizes wear, improves accuracy, and extends the lifespan of the timepiece.
  • What are the advantages of ruby bearings over metal?
    Ruby bearings offer superior advantages over metal, including exceptional wear resistance, an extremely low coefficient of friction, and excellent corrosion resistance, leading to longer service life and higher reliability in precision instruments.
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