SINGLE-CRYSTAL SAPPHIRE · CUSTOM ENGINEERED
Clarity. Strength.
Built for your process.
Precision sapphire tubes for optical access, sensor protection and demanding environments. From micro bores to large cylinders, made to your drawing.
01 / APPLICATIONS
Sapphire tubes combine an optically accessible wall with a hard, chemically resistant crystal structure. Select the tube around the medium, temperature profile and measurement task, not just its diameter.
A sapphire protection tube can isolate a temperature sensor from a challenging process atmosphere. Consider one-end-closed geometry for probe designs, subject to engineering review.
Immersion length, sensor clearance, response time, seal design and controlled heating/cooling.
Review a sensor applicationA polished sapphire tube provides optical access around a cylindrical component. Evaluate lamp sleeves, optical instruments and inspection assemblies where scratch resistance matters.
Wavelength, wall optical quality, curvature-induced refraction and the actual optical path.
Specify an optical sleeveSingle-crystal sapphire tubes are candidates for sensor housings and process-monitoring components. Material purity is relevant, but does not by itself guarantee a contamination-free process.
Process gases, cleaning protocol, particle limits, batch documentation and thermal cycling.
Discuss process compatibilityA custom sapphire tube offers a transparent alternative for selected reaction, digestion and analytical assemblies. Compatibility must be checked for the exact chemical, concentration and temperature.
Media compatibility, cleaning agents, exposure duration, pressure and assembly qualification.
Share your process conditionsSapphire tubes can support high-temperature measurement development in furnace and energy equipment. They require suitable mounting and validation under the actual atmosphere.
Temperature gradients, deposits, support spacing, vibration and replacement access.
Evaluate a protection tubeMicro sapphire tubes and short cylindrical sleeves suit small instrument concepts where bore geometry, electrical insulation and durable optical surfaces are useful.
Bore size, concentricity, edge condition, crystal orientation and prototype inspection.
Start a custom developmentApplication examples are engineering starting points, not approvals for a particular pressure, chemical or safety-critical installation.
02 / PRODUCT COLLECTION
Explore actual XINKEHUI sapphire tube photographs. The images illustrate available forms; exact dimensions, tolerances and end configurations are confirmed against your drawing.
Open-ended sapphire tubes for sleeves, optical instruments and custom assemblies. Define OD, ID and length as a coordinated set.
Request a custom sizeWide-bore sapphire tube concepts for inspection and instrument housings. Review wall thickness, diameter and handling requirements.
Discuss a cylinder designCompact sapphire tube components for precision devices. UST micro-bore dimensions are also listed below; this photo is not a scale reference.
Review your componentA CLOSER LOOK
Product footage shows a real transparent sapphire cylinder. Optical appearance in a photograph is not a substitute for a specified transmission test or dimensional inspection.
Request inspection requirements
Material detail / actual XINKEHUI product03 / MATERIAL ADVANTAGES
Mohs 9 sapphire provides high scratch and wear resistance. A sapphire tube remains brittle, however, so edge impacts and point loading must be avoided.
Single-crystal sapphire is an optical material used in visible and infrared systems. For a polished sapphire tube, specify wavelength and transmission through the actual wall geometry.
Sapphire has no polycrystalline grain-boundary network. The finished sapphire tube and its seals still require leak testing when a gas-tight assembly is needed.
Thermal and chemical resistance make sapphire tubes useful candidates for challenging environments. Operating limits depend on the medium, crystal orientation, geometry and assembly.
04 / TECHNICAL SPECIFICATIONS
Published XINKEHUI sapphire tube series ranges, with application-specific items separated from catalog dimensions. All dimensions below are in millimeters.
| Series | Outer Diameter | Wall / Bore | Maximum Length | Configuration |
|---|---|---|---|---|
| ST5 | 5-10 mm | Wall: 1-4 mm | Up to 1,400 mm | Open-ended; closed-end on review |
| ST10 | 10-20 mm | Wall: 1-8 mm | Up to 1,400 mm | Open-ended; closed-end on review |
| ST20 | 20-30 mm | Wall: 1-10 mm | Up to 1,400 mm | Open-ended; closed-end on review |
| ST30 | 30-50 mm | Wall: 1-15 mm | Up to 1,400 mm | Open-ended; closed-end on review |
| ST50 | 50-70 mm | Wall: 1-15 mm | Up to 400 mm | Open-ended; closed-end on review |
| UST | 1-3 mm | Inner bore: 0.3-1 mm | Up to 150 mm | Micro tube; ends by agreement |
For an open bore, ID = OD - 2 × wall thickness must be positive. Length and wall limits are feasibility-dependent; a catalog maximum is not a promise for every diameter.
For a custom sapphire tube, specify OD × ID × length, quantity, wall finish, end configuration and operating conditions. Window flatness and wafer roughness specifications do not automatically apply to a curved tube wall.
Tube series and catalog purity: XINKEHUI sapphire tube catalog. General single-crystal optical/material background: sapphire material reference. Published material properties are not a finished-part or system certification.
05 / CUSTOM MANUFACTURING
A reliable sapphire tube order starts with a shared definition of success. Align geometry, inspection and the delivery plan before production is released.
Share the sapphire tube drawing, quantity, application and temperature / chemical exposure.
Agree feasible dimensions, finish, acceptance criteria, quotation and the proposed schedule.
Manufacture to the approved requirements. Define any sample approval or special test before ordering.
Confirm protective packing, shipment details and revision control for subsequent sapphire tube orders.
Choose when optical access and high surface hardness justify precision crystal machining. Validate chemical exposure and avoid brittle edge loading.
Consider where low thermal expansion or a particular optical band is the priority. Evaluate scratch durability and high-temperature behavior separately.
Consider for nontransparent ceramic protection applications. Grade, porosity, gas permeability and assembly conditions still matter.
06 / ABOUT XINKEHUI
XINKEHUI is a Shanghai-based technology company working in semiconductor substrates and optical crystal materials. Our public company profile describes an engineering team, precision processing equipment and inspection capabilities for non-standard components.
For this sapphire tube program, the focus is simple: a feasible drawing, appropriate processing and a clearly agreed delivery plan. Contact shanghai xinkehui new materails co.,ltd for custom sapphire tubes, sleeves and cylinders.
Company OverviewDrawing-led machining, grinding, polishing and edge processing, subject to geometry review.
Inspection requirements established around your sapphire tube, not borrowed from a wafer datasheet.
Confirm production timing and shipment milestones at quotation. Fixed lead times and on-time rates are not assumed.
07 / QUESTIONS, ANSWERED
Useful answers for engineers and procurement teams, from a first drawing to a repeat order.
Ask a Technical QuestionA sapphire tube is a hollow component made from single-crystal aluminum oxide, alpha-Al2O3. It combines optical transparency with high hardness and is used in optical sleeves, sensor protection and precision instruments.
Yes, XINKEHUI supports drawing-led customization. Provide outer diameter, inner diameter, length, quantity, surface finish and operating conditions. Feasibility and tolerances are confirmed before a sapphire tube order is accepted.
ST5-ST50 series span 5-70 mm outer diameter. Catalog maximum lengths reach 1400 mm for ST5-ST30 and 400 mm for ST50. UST micro tubes list 1-3 mm OD, 0.3-1 mm bore and up to 150 mm length. Not every combination is feasible.
The XINKEHUI catalog includes one-end-closed sapphire tube configurations. Confirm the end geometry, remaining wall thickness, overall length and sensor fit. Pressure and leak requirements must be agreed for the finished assembly.
There is no universal operating-temperature rating for every sapphire tube. Atmosphere, thermal gradients, geometry, mounting and cycling matter. Share the normal and peak temperatures and heating/cooling rates for engineering review.
Do not assume an unrestricted thermal-shock rating. Sapphire is a brittle crystal; gradients and constrained expansion can cause damage. Use controlled temperature changes and qualify the actual sapphire tube assembly under representative conditions.
Sapphire has useful chemical resistance, but not universal compatibility. Provide the medium, concentration, operating temperature, exposure time and cleaning process. Harsh chemicals and molten materials require application-specific evaluation.
Specify which surfaces need polishing and the optical or roughness requirement. Inner-wall access depends on bore size and length. A polished sapphire tube still needs wavelength-specific evaluation when optical performance is critical.
Sapphire offers much higher surface hardness, while fused silica offers low thermal expansion. Optical behavior, temperature capability and chemical compatibility differ. Select a sapphire tube or quartz tube against the complete application, not one headline property.
No universal pressure or leak-rate guarantee is offered here. A dense crystal wall does not certify the complete sapphire tube assembly. Wall geometry, surface damage, end conditions and seals determine the required qualification.
Sapphire tube pricing, minimum order quantity, stock and delivery timing are confirmed by quotation. Diameter, length, bore, polishing, end configuration, inspection and quantity affect cost and scheduling. No numeric price range or live stock status is verified on this page.
Avoid point loads, edge impact and rigid mounting that prevents thermal expansion. Use compatible cleaning methods and protect polished surfaces from abrasive contact. Qualify seals, supports and cleaning agents for the actual sapphire tube application.
Define the sapphire tube inspection scope with the quotation: dimensions, visual acceptance, optical tests, material purity evidence or special leak tests where applicable. Documents and test methods must be agreed; they are not automatically included.
08 / LET'S BUILD YOUR PART
Tell us what the component needs to do. We will review dimensions, application conditions, inspection requirements and a proposed delivery schedule.
For drawings, send your PDF, STEP file or technical sketch directly by email or WhatsApp.
