CNC Machining JGS1 Quartz Glass – JGS1 Quartz Glass (CTE 0.55 x 10^-6 /K, 185 nm – 2.5 um (UV grade)); CNC Machining to +/-0.01 mm positional. No minimum order; DFM review included with every RFQ.
Ask any process engineer what makes jgs1 quartz glass difficult and the answer is specific: UV-grade surfaces must be polished without subsurface damage that scatters below 250 nm. Our cnc machining line is tooled around exactly that – 4-axis machining centers with diamond tooling and through-spindle coolant – holding +/-0.01 mm positional on parts from 0.5 – 50 mm thick.
Specification envelope
| Material | JGS1 Quartz Glass (UV-grade synthetic, bubble class 0) |
|---|---|
| Thermal expansion (CTE) | 0.55 x 10^-6 /K |
| Service temperature | 1,100 C continuous |
| Transmission range | 185 nm – 2.5 um (UV grade) |
| Density | 2.20 g/cm3 |
| Knoop hardness | 500 kg/mm2 |
| Refractive index | 1.458 @ 587 nm |
| Stock thickness | 0.10 – 30 mm |
| Maximum blank size | 300 mm diameter |
| Process | CNC Machining |
| Working tolerance | +/-0.01 mm positional |
| Minimum feature | 0.4 mm slot width |
| Surface finish | Ra 0.4 um ground, optional polish |
| Thickness window | 0.5 – 50 mm |
| Edge condition | chamfered 0.1 – 0.5 mm as standard |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Manufacturing capability
The core strength of CNC Machining is complex 3D geometry – pockets, steps, counterbores and compound edges in one setup. The honest limit: internal corners carry a minimum radius equal to the smallest practical tool, typically R0.5 mm. Both belong on the drawing before quoting, not after.
One material, many routes: on JGS1 Quartz Glass we also quote edge grinding, coring, double-side polishing, polishing, and multi-step drawings are the norm rather than the exception.
DFM notes from the shop floor
Before sending the RFQ, check these against your drawing:
- Material note: UV-grade surfaces must be polished without subsurface damage that scatters below 250 nm.
- Process boundary: internal corners carry a minimum radius equal to the smallest practical tool, typically R0.5 mm.
- 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
cnc machining jgs1 quartz glass shows up across laser systems (windows, beam splitters, debris shields); aerospace optics (sensor windows, star-tracker flats, radiation-tolerant ports). Background reading on the underlying material science: RP Photonics: fused silica.
Dimensions still moving? Configure this part live in the 3D builder below, or open the full custom glass machining 3D builder to start from a blank canvas.
Useful companion pages: JGS1 quartz glass, fused silica wafers 2-12 inch, CNC machining capability.
Buyer questions, answered
What tolerances are achievable on JGS1 Quartz Glass parts?
Ground features hold +/-0.01 mm and lapped thickness reaches +/-0.003 mm. UV-grade surfaces must be polished without subsurface damage that scatters below 250 nm.
What thickness range do you stock for JGS1 Quartz Glass?
Standard stock spans 0.10 – 30 mm, with blanks up to 300 mm diameter. Other formats are sourced per order.
How does JGS1 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 deep-UV transmission to 185 nm matters.
What accuracy does cnc machining hold?
+/-0.01 mm positional with minimum features of 0.4 mm slot width. Internal corners carry a minimum radius equal to the smallest practical tool, typically R0.5 mm.
What equipment runs the cnc machining work?
4-axis machining centers with diamond tooling and through-spindle coolant.
Specifications on this page were last reviewed by our engineering team in July 2026.