[Viet1108]

I use sintered diamond ring tools to generate spherical surfaces on glass. Quartz/fused silica is very hard glass. our application only requires plunge cuts along the z-axis to generate a curve and with this material we can only use a feedrate of about 0.05 to 0.1 mm/min. Any faster and it squeals like a banshee and the glass starts to light up like a christmas tree. For drilling you might be able to get away with faster feedrates, I've never had to drill it before. We use sintered diamond tooling with 0.18 mm size diamond particles with 75%-100% concentration. That seems to work but you could probably cut faster with a rougher tool. Hope this helps.

Thank you for your help