Quick answer: Coring Quartz Glass covers Quartz Glass (CTE 0.59 x 10^-6 /K, 260 nm – 2.5 um); Coring to diameter +/-0.05 mm. Prototypes ship in 5-10 working days.
coring quartz glass is a materials problem before it is a machining problem. Quartz Glass has fused from natural quartz crystal and a Knoop hardness of 500 kg/mm2, so the coring recipe – feeds, coolant, tooling – differs from what works on ordinary float glass. The line runs diamond core drills with rotary fixtures and holds diameter +/-0.05 mm.
Key parameters
| Material | Quartz Glass (GE214-equivalent, semiconductor grade) |
|---|---|
| Thermal expansion (CTE) | 0.59 x 10^-6 /K |
| Service temperature | 1,050 C continuous |
| Transmission range | 260 nm – 2.5 um |
| Density | 2.20 g/cm3 |
| Knoop hardness | 500 kg/mm2 |
| Refractive index | 1.459 @ 587 nm |
| Stock thickness | 0.20 – 60 mm |
| Maximum blank size | 450 mm diameter |
| Process | Coring |
| Working tolerance | diameter +/-0.05 mm |
| Minimum feature | 2 mm core diameter |
| Surface finish | ground bore, honed option |
| Thickness window | 1 – 60 mm |
| Edge condition | entry/exit chamfer standard |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Getting the drawing right
The shop-floor rules that matter here:
- Material note: natural-quartz batches vary in metallic ppm, so semiconductor lots need certs per melt.
- Process boundary: wall thickness between adjacent cores should exceed 2 mm to avoid bridge cracking.
- Over-specification is the quiet budget killer: a 20/10 scratch-dig face costs roughly three times an 80/50 face, so grade each surface individually.
For the complete framework, see the tolerance design guide and the holes and edges design guide.
What the process holds
Coring earns its place through large-diameter discs, rings and through-bores from plate stock up to 60 mm thick. Its boundary condition – wall thickness between adjacent cores should exceed 2 mm to avoid bridge cracking – is the first thing our DFM review checks.
Beyond this page, Quartz Glass routinely runs through cnc machining, double-side polishing, laser cutting, ultrasonic machining in our shop – most real parts combine two or three of these steps.
Who orders this
Orders for coring quartz glass cluster in semiconductor equipment (view ports, wafer carriers, plasma rings, chamber windows); laboratory instruments (cuvettes, sight glasses, stir-cell windows). Background reading on the underlying material science: ScienceDirect: quartz glass.
The fastest route to a quote is geometry: use the 3D builder below, draw a dimensioned 2D drawing from it, or open the site-wide custom glass machining 3D + 2D builder for fully custom parts.
Engineers scoping this work usually also review CNC machining capability, ultra-thin quartz discs, precision glass grinding.
Buyer questions, answered
What equipment runs the coring work?
Diamond core drills with rotary fixtures.
Is there a minimum order for coring quartz glass?
No. Single prototypes are accepted, and pricing steps down at 10, 100 and 1,000 pieces.
How fast can prototypes ship?
Machined prototypes ship in 5 – 10 working days. Coated or bonded parts add 1 – 2 weeks depending on queue slots.
What files do you need for a quote?
A dimensioned PDF plus DXF or STEP geometry. If only a sketch exists, our drawing review service formalizes it before quoting.
Specifications on this page were last reviewed by our engineering team in September 2026.