Grinding JGS2 Quartz Glass – JGS2 Quartz Glass (CTE 0.55 x 10^-6 /K, 220 nm – 2.5 um); Grinding to flatness to 5 um over 100 mm. No minimum order; DFM review included with every RFQ.
We grind JGS2 Quartz Glass daily, in thicknesses from 0.3 – 60 mm. The controlling numbers: flatness to 5 um over 100 mm working tolerance, thickness to +/-0.005 mm minimum features, and Ra 0.2 – 0.8 um off the machine. Where the drawing asks for more, downstream lapping and polishing take over.
Specifications at a glance
| 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 | Grinding |
| Working tolerance | flatness to 5 um over 100 mm |
| Minimum feature | thickness to +/-0.005 mm |
| Surface finish | Ra 0.2 – 0.8 um |
| Thickness window | 0.3 – 60 mm |
| Edge condition | ground perimeter, squareness 0.02 mm |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Manufacturing capability
The core strength of Grinding is bringing thickness, flatness and parallelism into calibrated tolerance before polish. The honest limit: subsurface damage of 5 – 15 um must be budgeted and removed by polishing on optical faces. Both belong on the drawing before quoting, not after.
One material, many routes: on JGS2 Quartz Glass we also quote edge grinding, drilling, polishing, coring, 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: subsurface damage of 5 – 15 um must be budgeted and removed by polishing on optical faces.
- 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.
Typical applications
grinding jgs2 quartz glass shows up across industrial displays (touch covers, gauge windows, printed bezels); laser systems (windows, beam splitters, debris shields); semiconductor equipment (view ports, wafer carriers, plasma rings, chamber windows). Background reading on the underlying material science: ScienceDirect: fused quartz.
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.
Related reading on this site: precision glass grinding, fused silica wafers 2-12 inch, glass hole micromachining.
Buyer questions, answered
What equipment runs the grinding work?
Rotary surface grinders and double-disc machines with diamond wheels.
Is there a minimum order for grinding jgs2 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.
Do parts ship with inspection data?
Dimensional reports, surface certificates and material certs per melt are available; specify the level on the RFQ.
Specifications on this page were last reviewed by our engineering team in September 2026.