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

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November 18, 2025
Category Connection: Sapphire Parts
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Tags:
#sapphire tube #sapphire bearings #sapphire windows
Brief: Let’s dive in — see how customized ruby bearings (Al₂O₃) enhance precision instruments and watch movements with their ultra-low friction, high wear resistance, and reliability in harsh environments. This video showcases their key features, applications, and performance benefits.
Related Product Features:
  • Made from synthetic corundum (Al₂O₃) doped with chromium for exceptional hardness and wear resistance.
  • Low friction coefficient (0.10-0.15) ensures smooth operation and reduced energy loss.
  • High-temperature resistance up to 800°C with excellent thermal stability.
  • Corrosion-resistant, ideal for harsh environments like aerospace and industrial settings.
  • Lubrication-free design due to ultra-smooth crystal surfaces.
  • Customizable geometries (spherical, conical, straight-hole) to fit specific applications.
  • Widely used in watch movements, precision instruments, and high-sensitivity devices.
  • Long service life with minimal wear, even under continuous micro-loading.
Faqs:
  • Why are ruby bearings preferred for precision instruments?
    Ruby bearings offer exceptional hardness, low friction, and high wear resistance, making them ideal for precision and long-term durability in mechanical systems.
  • Do ruby bearings require lubrication?
    Generally no. The polished crystal surface provides naturally low friction, allowing lubrication-free operation in many applications.
  • Can ruby bearings withstand extreme environments?
    Yes. Ruby is chemically inert and highly resistant to corrosion, extreme temperatures, and humidity, making it suitable for aerospace, laboratory, and industrial environments.
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