Coring JGS2 Quartz Glass – JGS2 Quartz Glass (CTE 0.55 x 10^-6 /K, 220 nm – 2.5 um); Coring to diameter +/-0.05 mm. No minimum order; DFM review included with every RFQ.
Ask any process engineer what makes jgs2 quartz glass difficult and the answer is specific: thicker blanks need stress-relief annealing before tight-flatness grinding. Our coring line is tooled around exactly that – diamond core drills with rotary fixtures – holding diameter +/-0.05 mm on parts from 1 – 60 mm thick.
Specification envelope
| Material | JGS2 Quartz Glass (Optical grade, bubble class 1) |
|---|---|
| Thermal expansion (CTE) | 0.55 x 10^-6 /K |
| Service temperature | 1,100 C continuous |
| Transmission range | 220 nm – 2.5 um |
| Density | 2.20 g/cm3 |
| Knoop hardness | 500 kg/mm2 |
| Refractive index | 1.458 @ 587 nm |
| Stock thickness | 0.20 – 40 mm |
| Maximum blank size | 300 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 |
Capabilities and limits
The core strength of Coring is large-diameter discs, rings and through-bores from plate stock up to 60 mm thick. The honest limit: wall thickness between adjacent cores should exceed 2 mm to avoid bridge cracking. Both belong on the drawing before quoting, not after.
One material, many routes: on JGS2 Quartz Glass we also quote drilling, dicing, laser cutting, cnc machining, and multi-step drawings are the norm rather than the exception.
Design guidance
Three items decide most of the cost and lead time on this work:
- Material note: thicker blanks need stress-relief annealing before tight-flatness grinding.
- 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.
The full rules live in our tolerance design guide and holes and edges design guide.
Who orders this
The recurring buyers of coring jgs2 quartz glass: laser systems (windows, beam splitters, debris shields); scientific instruments (reference flats, cells, prism mounts, stage inserts); led packaging (groove covers, phosphor carriers, package windows). Background reading on the underlying material science: ScienceDirect: fused quartz.
The fastest route to a quote is geometry: use the 3D configurator below, or the site-wide custom glass machining 3D builder for fully custom parts.
Related reading on this site: glass wafer coring, fused silica wafers 2-12 inch, glass hole micromachining.
Common questions
What tolerances are achievable on JGS2 Quartz Glass parts?
Ground features hold +/-0.01 mm and lapped thickness reaches +/-0.003 mm. Thicker blanks need stress-relief annealing before tight-flatness grinding.
What thickness range do you stock for JGS2 Quartz Glass?
Standard stock spans 0.20 – 40 mm, with blanks up to 300 mm diameter. Other formats are sourced per order.
How does JGS2 Quartz Glass behave under heat?
CTE is 0.55 x 10^-6 /K and continuous service reaches 1,100 C continuous, which is what drives its use where visible and near-IR clarity matters.
What accuracy does coring hold?
Diameter +/-0.05 mm with minimum features of 2 mm core diameter. Wall thickness between adjacent cores should exceed 2 mm to avoid bridge cracking.
Specifications on this page were last reviewed by our engineering team in July 2026.