Custom Quartz Glass
Machined, Formed & Built to Your Drawing
FGQuartz fabricates custom quartz glass components to your drawing when standard parts won’t fit. Using high-purity fused silica and in-house CNC diamond machining, oxy-hydrogen flame working, welding and fire polishing, we produce non-standard geometries and assemblies — special flow paths, flanged joints, multi-port reactors and optical windows — from prototype to production with no minimum order quantity.
No catalogue covers every application. When a standard tube, rod or plate cannot do the job, FGQuartz produces the custom fused silica component your process requires — to your drawing, your dimensions and your geometry. From a single prototype to full production, our facility has manufactured precision custom quartz components for semiconductor, optical, solar and research customers across 40+ countries since 2005.
What Is Custom Quartz Glass Fabrication?
Custom quartz glass fabrication is the process of manufacturing high-purity fused silica components directly to a customer’s CAD drawing, dimension set or functional specification — rather than from a fixed catalogue of standard sizes. It covers everything from a simple non-standard length tube cut, through to multi-port reactor vessels with precision-machined flanges, optical-grade polished windows, and flame-welded gas inlet assemblies.
This capability is essential whenever application geometry, dimensional constraints or specialized equipment interfaces cannot be met by any stock product. Semiconductor tool engineers, photonic systems designers, solar process engineers and laboratory researchers rely on custom fabrication to bring their designs to life.
Why Fused Silica for Custom Components?
Fused silica (amorphous silicon dioxide) uniquely combines extreme thermal stability, near-zero coefficient of thermal expansion, broad UV-to-IR optical transmission and chemical inertness to most industrial process environments. No other affordable glass or ceramic material provides all of these properties simultaneously.
These characteristics make custom quartz components irreplaceable in high-temperature, chemically aggressive or optically critical applications where polymers, metals and ordinary glasses fail. Fused silica is also fully machinable — it can be ground, drilled, turned and polished with diamond tooling to the tight geometrical accuracy demanded by precision process equipment.
When to Choose Custom Over Standard
- Non-standard outer diameter, wall thickness or length not found in any catalogue
- Flanges, ports, closed ends or other fabricated features on a tube or vessel
- Complex hollow geometries — tees, crosses, multi-arm manifolds, bent sections
- Optical elements — windows, cuvettes, prisms — with specific dimensions or surface quality
- Assembly of multiple quartz components into a single integrated unit
- Reproduction of a broken component for which no drawing exists
Two Core Fabrication Routes: CNC Cold Machining & Thermal Processing
FGQuartz executes complex custom projects by deploying two highly complementary manufacturing routes. Advanced components often require seamless integration of both processes to achieve strict mechanical tolerances and complex geometries.
Thermal Processing — Oxy-Hydrogen Forming & Vacuum Welding
Thermal processing applies intensely focused oxy-hydrogen flames to soften, bend, fuse and vacuum-seal fused silica, enabling the construction of complex hollow structures and seamless joints.
Key Capabilities:
- High-integrity flame welding for tube-to-tube and tube-to-flange integration
- Precision tube bending, stretching and diameter expansion/reduction
- Domed or flat end-sealing and complex side-arm additions
- Fire polishing for ultra-clean, particulate-free surfaces
- Controlled thermal annealing to eliminate localized weld stress
Typical Engineered Components:
- Multi-chamber reactor vessels and complex chemical baths
- Vacuum-sealed thermocouple protection tubes and heating envelopes
- Multi-port gas manifolds (Tees, Crosses, Y-joints)
- Integrated U-shaped, L-shaped and serpentine process tubes
- Controlled-atmosphere process modules
Cold Processing — Precision CNC Machining & Grinding
Cold processing leverages multi-axis CNC centers and specialized diamond tooling to achieve micro-tolerances and geometric complexities that thermal forming alone cannot produce.
Key Capabilities:
- Precision CNC turning and centerless grinding
- Multi-axis milling of tight-tolerance slots, pockets and freeform profiles
- Diamond core drilling (through holes and blind holes)
- Thread machining (internal and external) and edge chamfering
- Lapping and optical-grade surface polishing (controlled Ra)
Typical Engineered Components:
- Process tubes featuring machined steps, tapers or O-ring grooves
- Solid support rods, push paddles and structural isolation elements
- Optical windows, specialized cuvettes and vacuum substrates
- Semiconductor wafer boats with highly accurate pitch slotting
- Custom CNC-machined flanges and base plates
Custom Quartz Product Categories
Almost any geometry that can be modeled in CAD can be manufactured in high-purity fused silica. Below are the primary custom product families we engineer and fabricate.
Custom Quartz Tubes & Reactors
Built to print with non-standard diameters, customized wall thicknesses, welded flanges, side ports, end caps and complex multi-port configurations. Discover our baseline quartz glass tubes.
Optical Windows, Cuvettes & Plates
Precision-machined viewports, beam-splitter substrates, cuvettes and flow cells produced in JGS1 / JGS2 / JGS3 grades, featuring laser-grade surface polishing. See our quartz glass plates & windows.
Semi & Solar Equipment Parts
Highly tailored wafer boats, push paddles, furnace liners, gas injectors and specialty process hardware optimized for OEM tool platforms and Solar PV applications.
Custom Rods, Paddles & Structural Parts
Solid centerless-ground rods, flat push blades, electrical isolation columns, specialized thermocouple fittings and structural quartz members. View our quartz glass rods.
Complex Assemblies & Special Shapes
Fully integrated quartz devices fusing CNC-machined and thermal-worked elements. Ideal for highly specialized laboratory apparatus, optical systems and high-temperature processing environments.
OEM / ODM & Reverse Engineering
From rapid NPI (New Product Introduction) and reverse engineering of legacy parts, to full-scale OEM blanket orders supported by robust traceability. Learn more about FGQuartz.
How to Order Custom Quartz Glass from FGQuartz
Our agile NPI workflow guarantees that rigorous engineering standards are applied equally — whether we are producing a single R&D prototype or high-volume OEM blanket orders.
1. Submit CAD Drawings
Provide your technical drawings (DXF, STEP, IGES, PDF) or dimensioned engineering sketches. Please include specific tolerances and functional application details.
2. DFM Review & Optimization
Our engineering team conducts a thorough Design for Manufacturability analysis, determining the most efficient CNC cold or thermal hot processing routes to reduce costs and ensure structural integrity.
3. Quotation & Approval
You will receive a transparent quotation detailing pricing tiers, manufacturing lead times and finalized production drawings for your final approval before scheduling.
4. First Article Inspection (FAI)
For highly complex or critical OEM designs, we manufacture a First Article accompanied by a comprehensive dimensional metrology report for your physical validation prior to volume production.
5. Manufacturing & Strict QA
Batch production follows under ISO 9001 controls. Optical finishes and high-vacuum flame welds undergo rigorous polariscopic stress inspection and surface profiling.
6. Clean Packaging & Global Despatch
Components are meticulously cleaned, vacuum-sealed if required, and secured in custom export packaging to guarantee damage-free global transit. Full material CoC documentation is included.
Why Choose FGQuartz for Custom Quartz Fabrication
- End-to-end integration: Advanced CNC cold machining and expert thermal flame processing under one roof
- Agile manufacturing with NO Minimum Order Quantity — single R&D prototypes are highly welcomed
- Complimentary Engineering DFM (Design for Manufacturability) review
- Rapid engineering quotes typically returned within 24 business hours
- Guaranteed ultra-high-purity fused silica (SiO₂ ≥ 99.99%) across all custom components
- Strictly managed ISO 9001-certified production workflows
- Deep technical legacy since 2005, serving top-tier semiconductor, solar and photonics OEMs
- Established export network to 40+ countries with full compliance documentation
- Comprehensive OEM / ODM manufacturing programs perfectly scaled to your supply chain
- Secure NDA (Non-Disclosure Agreement) protection available prior to drawing submission
- Unwavering quality consistency translating seamlessly from FAI prototypes to volume rollouts
- Full ecosystem access: tubes, rods, plates, wafer boats, crucibles and more
Frequently Asked Questions
CNC machining (turning, milling, drilling), flame working (blowing, welding, forming), and optical grinding and polishing.
Low MOQ — we accept single-piece prototypes through volume production.
DXF, STEP, IGES and PDF. We provide a free design-for-manufacturability review before quoting.
Custom tubes with welded flanges and side holes, custom rods and plates, multi-port reactors, optical windows and integrated assemblies.
Ready to Start Your Custom Quartz Project?
Submit your CAD drawings or dimensional specifications today. Our engineering team will rigorously review the design for manufacturability, recommend the optimal CNC or thermal processing route, and provide a transparent quotation — typically within 24 business hours. Both single-piece R&D prototypes and high-volume production schedules are fully supported.