This custom short thick-wall fused quartz tube is a precision-machined quartz component featuring a compact cylindrical body and a single straight bore running through the product in the axial direction. Compared with conventional long, thin-wall quartz tubing, this component has a relatively large outer diameter, short overall length, and substantial wall thickness.
Its distinctive short-cylinder shape provides a stable structure for installation, positioning, insulation, flow guidance, spacing, and high-temperature equipment applications. The product can also be described as a thick-wall quartz sleeve, quartz bushing, precision quartz spacer, or short fused silica tube, depending on its final use.
As shown by its shape, the component consists of a transparent cylindrical quartz body, two flat circular end faces, and one continuous internal hole. There is no separate side port or additional capillary connection. The visible internal structure is the wall of the single axial bore viewed through the transparent quartz body.
The outer diameter, total length, internal hole diameter, wall thickness, end-face condition, concentricity, and dimensional tolerances can all be customized according to customer drawings or physical samples.
Compact Short-Cylinder Structure
The most recognizable feature of this product is its compact, drum-like cylindrical geometry. Its overall length is significantly shorter than that of a conventional quartz pipe, while the outer diameter is comparatively large. This creates a thick and mechanically stable quartz structure
around the internal bore.
The short cylindrical form is suitable for equipment with limited installation space. It can be installed as an independent quartz component or assembled together with metal, ceramic, graphite, semiconductor, or other high-temperature parts.
Depending on the application, the component may be used as:
- A quartz insulating sleeve;
- A precision positioning spacer;
- A high-temperature support component;
- A gas or liquid guide tube;
- A quartz bushing;
- An optical equipment component;
- A semiconductor equipment quartz part;
- A protective sleeve around another component.
The exact function depends on the internal hole diameter, wall thickness, end-face design, and operating environment.
Single Axial Through-Bore
A straight hole passes through the quartz body along its longitudinal axis. This internal bore is the main functional feature of the component.
The bore can be manufactured as a centered hole or, where technically required, as a slightly offset hole according to a customer drawing. Its diameter may be selected for inserting rods, wires, sensors, optical fibers, electrodes, thermocouples, gas lines, or other small components.
When used as a flow channel, the bore may also guide gas or liquid through the quartz body. However, the appropriate inner diameter, operating pressure, sealing method, and connection structure should be confirmed according to the actual application.
The bore surface can be supplied in different conditions, including standard machined, ground, fire-polished, or specially cleaned finishes. For applications involving small internal diameters, the achievable inner-surface finish depends on the bore size and processing method.
High-Purity Fused Quartz Material
The product can be manufactured from fused quartz or fused silica material selected according to the required purity, optical performance, temperature resistance, and processing environment.
Fused quartz offers several advantages for industrial and laboratory applications:
- Low thermal expansion;
- Good thermal shock resistance;
- High-temperature stability;
- Good electrical insulation;
- High chemical purity;
- Low contamination potential;
- Good transmission in selected optical wavelengths;
- Transparent appearance for visual inspection.
These characteristics make fused quartz suitable for semiconductor processing, laboratory instruments, thermal equipment, optical systems, vacuum assemblies, analytical devices, and high-purity industrial applications.
Different quartz grades can be offered according to the project. Customers should specify whether the component requires standard industrial fused quartz, high-purity quartz, ultraviolet-grade fused silica, or another specific quartz material.
Precision End-Face Processing
Both ends of the short quartz tube are formed as circular flat surfaces. The end faces can be processed according to installation and sealing requirements.
Available end-face options may include:
- Fine-ground finish;
- Lapped finish;
- Transparent polished finish;
- Frosted finish;
- Fire-polished finish;
- Chamfered edges;
- Rounded edges;
- Controlled flatness;
- Controlled parallelism.
For positioning or assembly applications, end-face parallelism is important because uneven end surfaces may cause tilting or unstable contact.
For optical or inspection-related applications, transparent polishing may be required. For general mechanical installation, a fine-ground or lapped surface may be sufficient and more economical.
The edges can also be chamfered or rounded to reduce the risk of chipping during handling, cleaning, assembly, and transportation.
Customized Dimensions and Tolerances
This quartz tube is primarily supplied as a custom-manufactured component. There is no single standard dimension suitable for every application.
The following parameters can be customized:
- Outer diameter;
- Overall length;
- Inner-hole diameter;
- Wall thickness;
- Hole position;
- Hole straightness;
- Outer-diameter tolerance;
- Inner-diameter tolerance;
- End-face flatness;
- End-face parallelism;
- Inner and outer concentricity;
- Surface roughness;
- Edge chamfer dimensions;
- Quartz material grade;
- Cleaning level;
- Packaging method.
For components with a very small internal hole and a relatively large outer diameter, maintaining accurate concentricity and straightness requires careful material selection and processing control.
Customers are encouraged to provide a complete technical drawing showing all dimensions, tolerances, surface requirements, and critical inspection points. Physical samples can also be evaluated when drawings are unavailable.
Manufacturing and Processing Capabilities
The production of a short thick-wall quartz tube may involve several processes, depending on the original quartz material and final dimensions.
Available processing services include:
- Quartz tube cutting;
- Quartz rod drilling;
- Precision bore machining;
- Outer-diameter grinding;
- Centerless grinding;
- End-face grinding;
- Surface polishing;
- Inner-hole processing;
- Edge chamfering;
- Fire polishing;
- Quartz welding;
- Ultrasonic cleaning;
- High-purity cleaning;
- Customized packaging.
For relatively thick components, the part may be produced from a thick-wall quartz tube blank or machined from solid quartz material. The most suitable method depends on the required outer diameter, internal hole size, length, tolerance, quantity, and surface finish.
Typical Applications
Because of its compact cylindrical form and precision axial bore, this custom quartz tube can be used in a wide range of industrial and research systems.
Typical application areas include:
- Semiconductor process equipment;
- Quartz furnace accessories;
- High-temperature laboratory instruments;
- Gas delivery and sampling systems;
- Optical and analytical equipment;
- Sensor protection assemblies;
- Thermocouple insulation;
- Electrical insulation components;
- Vacuum equipment;
- Plasma processing systems;
- Chemical processing instruments;
- Research and testing equipment;
- Precision positioning fixtures;
- Quartz spacers and bushings;
- High-purity fluid handling equipment.
The product may also be designed as a supporting or insulating component around a metal rod, ceramic tube, electrode, heating element, wire, or sensor.
Because the actual application cannot be determined solely from the product shape, operating temperature, media, pressure, assembly method, and loading conditions should be provided before production.
Product Advantages
Thick and Stable Structure
The large wall thickness provides better handling stability than very thin quartz tubes. It also allows the component to be machined with a small internal hole while maintaining sufficient surrounding material.
Compact Installation Size
The short cylindrical shape is suitable for compact equipment assemblies and confined installation positions.
Precision Internal Bore
The single axial hole can be manufactured according to the required diameter and tolerance for positioning, insulation, insertion, or flow-guidance applications.
Transparent Quartz Body
The transparent body allows visual observation of the internal bore, inserted component, contamination, residue, or assembly position.
High-Temperature Compatibility
Fused quartz can be used in many elevated-temperature environments, provided that the actual operating temperature, thermal cycle, mechanical loading, and installation conditions are properly evaluated.
Custom Manufacturing
The product can be manufactured in different outer diameters, lengths, bore sizes, surface finishes, quartz grades, and tolerance levels.
Quality Inspection
Customized quartz components can be inspected according to the agreed drawing and technical requirements. Typical inspection items include:
- Outer diameter;
- Overall length;
- Inner-hole diameter;
- Wall thickness;
- Bore straightness;
- Hole position;
- Concentricity;
- End-face flatness;
- End-face parallelism;
- Surface scratches;
- Edge chips;
- Visible bubbles;
- Internal inclusions;
- Surface cleanliness;
- Packaging condition.
For precision projects, dimensional inspection records, product photographs, material information, and inspection reports can be provided according to the purchase requirements.
Ordering Information
For an accurate quotation, please provide:
- Required outer diameter;
- Overall length;
- Axial through-hole diameter;
- Dimensional tolerances;
- End-face finish;
- Surface finish requirement;
- Concentricity requirement;
- Quartz purity or material grade;
- Operating temperature;
- Intended application;
- Contact media or process gas;
- Required quantity;
- Technical drawing or physical sample.
Prototype production, small-quantity orders, and batch manufacturing can be evaluated according to the component dimensions and processing difficulty.
FAQ
1. Is this a solid quartz rod or a quartz tube?
It is a thick-wall quartz tube because it contains a continuous axial hole. Its large wall thickness and short length may make it look similar to a solid quartz cylinder, but the through-bore makes it a tubular component.
2. Does the product have a side capillary port?
No. The pictured structure has one axial through-bore and does not have a separate side capillary port. The internal shape visible through the transparent body is caused by the bore and the optical refraction of quartz.
3. Can the internal-hole diameter be customized?
Yes. The bore diameter can be customized according to the customer’s drawing. Manufacturing feasibility depends on the outer diameter, total length, minimum wall thickness, tolerance, and required hole straightness.
4. Can both end faces be transparently polished?
Yes. The end faces can be ground, lapped, frosted, fire-polished, or transparently polished. The appropriate finish should be selected according to positioning, optical, sealing, and cost requirements.
5. Can you manufacture the product according to a sample?
Yes. Production can be evaluated using a physical sample, but a dimensional drawing is recommended for accurately controlling the outer diameter, length, bore diameter, flatness, parallelism, and tolerances.
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