Custom Sapphire Multi-Bore Tubes – 2-Hole & 4-Hole Precision Sapphire Tubing

Precision 2-Hole, 4-Hole and Multi-Channel Sapphire Tubing

Sapphire multi-bore tubes are precision-machined tubular components made from synthetic single-crystal sapphire. Unlike conventional single-hole sapphire tubes, multi-bore designs integrate two, four or multiple independent channels within one compact cylindrical body.

These structures are suitable for applications requiring multiple isolated channels, compact dimensions, high wear resistance, electrical insulation, optical transparency or operation under elevated temperatures and harsh environments.

We provide customized sapphire multi-hole tubes according to customer drawings, including bore diameter, outer diameter, hole quantity, hole arrangement, tube length, dimensional tolerance and surface finish.

Product Features

Multi-Bore Structure

Available configurations include:

• 2-hole sapphire tubes
• 4-hole sapphire tubes
• Multi-channel sapphire tubes
• Symmetrical or customized hole arrangements
• Different bore diameters within one tube
• Custom OD, ID and tube length

The bore layout can be designed according to the customer's assembly, fluid, optical fiber, sensor or electrode requirements.

Typical Specifications

Reference Sizes

Based on your current samples, this section can be added directly:

Other dimensions are available upon request.

Why Sapphire for Multi-Bore Tubes?

High Hardness and Wear Resistance

Sapphire has excellent hardness and abrasion resistance, making sapphire multi-hole tubes suitable for components exposed to repeated friction, sliding, wire movement or long-term mechanical wear.

Compared with conventional glass or polymer tubing, sapphire provides much better dimensional stability in demanding working environments.

High Temperature Resistance

Sapphire maintains good structural stability at elevated temperatures and can be used in applications where ordinary glass, plastic or polymer tubes may soften, deform or degrade.

Electrical Insulation

As an electrically insulating ceramic crystal, sapphire is suitable for isolating wires, electrodes, sensors or other conductive components within compact assemblies.

Optical Transparency

Sapphire offers optical transmission over a broad spectral range, making it suitable for optical, sensing and laser-related applications where a transparent structural material is required.

Chemical and Corrosion Resistance

Sapphire provides good resistance to many chemicals and harsh environments, making it useful for analytical, semiconductor and industrial systems.

Precision Multi-Bore Machining

Producing several small bores inside a sapphire tube requires precise control of:

• Bore diameter
• Bore-to-bore spacing
• Hole position
• Concentricity
• Outer diameter
• Wall thickness
• Channel straightness
• End-face quality
• Chipping and edge condition

For small-diameter sapphire tubing, the relationship between outer diameter, bore diameter and remaining wall thickness is especially important.

Our engineering team can review customer drawings before production and evaluate whether the requested multi-bore geometry is suitable for machining.

Custom Hole Configurations

Multi-bore sapphire tubes can be manufactured according to different layouts.

2-Bore Sapphire Tube

Two parallel channels are integrated into one sapphire tube.

Suitable for:

• Dual-wire insulation
• Electrode separation
• Sensor assemblies
• Optical fiber protection
• Gas or fluid channels

4-Bore Sapphire Tube

Four independent channels are arranged inside one compact sapphire body.

Suitable for:

• Multi-electrode assemblies
• Multi-fiber positioning
• Compact sensor structures
• Instrumentation components
• Precision feedthrough structures

Custom Multi-Channel Sapphire Tube

For specialized projects, bore quantity, position and diameter can be customized according to technical drawings.

Applications

Sapphire multi-bore tubes can be used in:

• Semiconductor equipment
• High-temperature sensors
• Optical instruments
• Laser systems
• Fiber-optic assemblies
• Electrical insulation components
• Electrode positioning
• Analytical instruments
• Precision measuring equipment
• Scientific research equipment
• Vacuum systems
• High-temperature furnaces
• Industrial sensor assemblies

Surface and End-Face Options

Different surface finishes can be supplied according to application requirements.

Outer surface

• Ground
• Fine ground
• Polished

End face

• Ground
• Fine polished
• Optical polished upon request

Edges

• As-cut
• Deburred
• Chamfered

For applications involving fiber insertion, wire feeding or precision assembly, bore entrance condition and edge chipping can also be controlled according to customer requirements.

Custom Sapphire Tube Manufacturing

We support both prototype development and batch production.

Customers can provide:

• 2D drawing
• 3D drawing
• Sample
• OD and bore dimensions
• Hole quantity
• Hole arrangement
• Tube length
• Tolerance requirements
• Surface finish requirements
• Application conditions

Our team can evaluate manufacturability and recommend suitable dimensions before quotation.

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