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Precision Sapphire Tubes – Polished OD & Ground ID for Optical, Fluidic & Semiconductor Use

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January 09, 2026
Category Connection: Sapphire Parts
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#sapphire tube #sapphire bearings #sapphire windows
Brief: Looking for a straightforward way to solve challenges in optical, fluidic, and semiconductor applications? This video showcases our precision sapphire tubes, demonstrating their dual-finish design with a polished OD for optical clarity and a ground ID for wear resistance. You'll see how these durable, chemically inert tubes perform in extreme environments and learn about their key engineering specifications.
Related Product Features:
  • Features a dual-finish design with an optically polished outside diameter for clarity and a fine-ground inside diameter for controlled friction.
  • Constructed from 99.9% single-crystal sapphire for extreme durability and a Mohs 9 hardness rating.
  • Offers exceptional thermal stability, performing reliably from cryogenic temperatures up to 2000°C.
  • Exhibits high chemical inertness, resisting aggressive plasma, strong acids, and alkalis.
  • Precision-engineered for optimal concentricity and parallelism, ensuring reliable high-pressure sealing.
  • Ideal for semiconductor processing, medical fluidics, laser cavities, and precision mechanical assemblies.
  • Available in a wide range of sizes, with a maximum length of 250mm and diameter up to φ250mm.
  • Can be custom-manufactured to precise specifications, including micro-orifices as small as 0.2mm.
FAQs:
  • Why choose a sapphire tube with a polished OD and ground ID?
    This configuration is ideal for applications requiring both optical access and mechanical performance. The polished OD allows for visual monitoring or laser transmission, while the ground ID ensures controlled friction and better wear resistance for moving parts like plungers.
  • What are the maximum dimensions available for these sapphire tubes?
    We can manufacture sapphire tubes up to 250mm in length and up to φ250mm in diameter, accommodating a wide range of applications from micro-fluidics to larger industrial systems.
  • How is the concentricity between the OD and ID ensured?
    Using precision CNC grinding centers, we achieve concentricity up to 0.02mm and parallelism as tight as 2 Arc Seconds, which is critical for high-pressure seals and precise optical alignment.
  • Is the sapphire tube resistant to hydrofluoric acid (HF)?
    Yes, sapphire exhibits excellent chemical resistance and can withstand most acids, including HF at common concentrations used in semiconductor etching. We recommend verifying specific process conditions for extreme cases.
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