Precision Diameter Glass Discs – diameter +/-0.01 mm, roundness 5 um. No minimum order; DFM review included with every RFQ.
Drawings fail at the tolerance block more than anywhere else. For precision diameter glass discs the achievable envelope is diameter +/-0.01 mm, roundness 5 um – the method is centerless edge grinding.
The numbers
| Held tolerance | diameter +/-0.01 mm, roundness 5 um |
|---|---|
| Method | centerless edge grinding |
| Reference standard | to-drawing verification |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Getting the drawing right
The shop-floor rules that matter here:
- Cite to-drawing verification on the drawing so both sides measure the same way.
- 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.
Where these parts end up
The recurring buyers of precision diameter glass discs: laboratory instruments (cuvettes, sight glasses, stir-cell windows); machine vision (camera windows, ring-light diffusers, calibration plates); oled packaging (cover lids, frit-seal frames, fill-port plates).
Prefer to sketch it? Our custom glass machining 3D + 2D builder accepts your dimensions directly and routes them to engineering.
Related reading on this site: thickness and flatness guide, wafer dicing process, custom FTO glass.
Frequently asked questions
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.
Which standard governs this?
to-drawing verification, verified by centerless edge grinding.
Specifications on this page were last reviewed by our engineering team in August 2026.