Description

Custom Sapphire Multi-Hole Capillary Tubes

Sapphire multi-hole capillary tubes are precision components manufactured from synthetic single-crystal sapphire and designed with two, four or multiple longitudinal holes inside one compact tubular body.

The multi-hole structure allows several wires, fibers, electrodes or other small components to pass through a single sapphire tube while maintaining physical separation between individual channels.

With excellent hardness, wear resistance, electrical insulation and thermal stability, sapphire multi-hole tubes are suitable for demanding precision assemblies where conventional glass, ceramic or polymer tubing may not provide sufficient durability.

We provide custom sapphire tubing according to drawings, including outer diameter, bore diameter, number of holes, bore spacing, length, tolerance and surface finish.

Product Specifications

Typical Available Dimensions

Current multi-hole sapphire tube designs include:

These dimensions are examples only.

Custom outer diameter, hole diameter, hole spacing and tube length are available according to customer drawings.

Key Features

Precision Multi-Hole Structure

Two or more longitudinal holes can be integrated into one sapphire component.

Depending on the application, we can evaluate:

• 2-hole structures
• 4-hole structures
• Multiple micro holes
• Parallel bore layouts
• Symmetrical bore arrangements
• Different bore diameters
• Customized hole spacing

This makes it possible to combine multiple functional channels in a compact component.

Excellent Wear Resistance

Sapphire offers very high hardness and excellent resistance to abrasion.

This property is particularly useful when wires, fibers, electrodes or other components repeatedly contact the internal bore surfaces.

Compared with ordinary glass or plastic tubing, sapphire provides better long-term dimensional stability in demanding mechanical environments.

Electrical Insulation

Sapphire is an electrically insulating material.

Multiple holes within one sapphire tube can therefore be used to separate several conductive elements in a compact assembly.

Typical examples include:

• Electrical leads
• Sensor wires
• Electrodes
• Probe components
• Precision feedthrough structures

High Temperature Performance

Sapphire maintains excellent dimensional and mechanical stability under elevated temperatures.

For this reason, sapphire tubing can be considered for:

• High-temperature sensors
• Furnace instrumentation
• Thermal processing equipment
• Vacuum systems
• Semiconductor equipment
• Industrial monitoring systems

High Chemical Stability

Sapphire provides good resistance to many aggressive environments and can maintain surface integrity in applications where ordinary materials may deteriorate.

This property is useful for analytical instruments, process equipment and specialized industrial systems.

Dual-Hole Sapphire Capillary Tube

The dual-hole design contains two independent longitudinal channels within one sapphire body.

This structure is suitable for applications such as:

• Dual electrode positioning
• Two-wire insulation
• Temperature sensor assemblies
• Optical fiber positioning
• Precision electrical feedthroughs
• Probe assemblies

Hole diameter and spacing can be optimized according to customer requirements.

Four-Hole Sapphire Capillary Tube

Four-hole sapphire tubing provides four independent channels within one compact outer diameter.

Typical applications include:

• Multi-wire insulation
• Four-electrode assemblies
• Optical fiber positioning
• Sensor packages
• Scientific instruments
• Precision feedthrough components

The four-hole arrangement can be customized according to the final assembly design.

Precision Bore and Geometry Control

The manufacturing of small sapphire multi-hole tubes requires careful control of both external dimensions and internal bore geometry.

Important parameters include:

• Bore diameter
• Bore position
• Hole-to-hole spacing
• Channel straightness
• Outer diameter
• Minimum wall thickness
• Concentricity
• Tube length
• End-face quality
• Edge chipping

For very small outer diameters, the ratio between hole diameter and remaining sapphire wall thickness is especially important.

We recommend providing a technical drawing for manufacturability evaluation before production.

Surface Finish Options

Different finishing processes can be selected according to the final application.

Outer Surface

• Ground
• Fine ground
• Polished

End Face

• Standard ground
• Fine ground
• Polished

Bore Entrance

• Standard edge
• Deburred
• Light chamfer
• Custom edge treatment

Special surface requirements can be reviewed according to bore size and component geometry.

Applications

Sapphire multi-hole capillary tubing can be used in:

• Semiconductor equipment
• High-temperature sensors
• Electrical feedthroughs
• Optical fiber assemblies
• Laser equipment
• Precision instruments
• Analytical systems
• Scientific equipment
• Electrode positioning
• Vacuum systems
• Furnace equipment
• Industrial probes
• Measurement equipment
• High-temperature insulation assemblies

Custom Sapphire Tube Manufacturing

We support customized sapphire tube projects for both prototype development and volume production.

Customers can provide:

• Product drawing
• Outer diameter
• Bore quantity
• Bore diameter
• Hole spacing
• Tube length
• Dimensional tolerance
• Surface finish
• Edge requirement
• Required quantity

Our engineering team can review the design and evaluate the feasibility of the requested bore geometry before quotation.

Information Required for Quotation

For faster quotation, please provide:

1. Outer diameter
2. Number of holes
3. Bore diameter
4. Bore spacing
5. Tube length
6. Quantity
7. Dimensional tolerance
8. Surface finish
9. End-face requirement
10. Drawing or application

Custom drawings, prototype quantities and repeat production are welcome.