Quick answer: How to Specify a Precision Glass Part covers custom precision glass machined to drawing with inspection reports. Prototypes ship in 5-10 working days.
The question behind how to specify a precision glass part is usually “What do engineers most often leave off?” – short answer: Which faces are optical, edge finish, and whether chips or bubbles matter – the three most-revised drawing items. The rest of this page covers the detail that changes the answer for specific parts.
Specification envelope
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
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Design guidance
Three items decide most of the cost and lead time on this work:
- 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
Orders for how to specify a precision glass part cluster in optical sensors (sensor windows, filter caps, lens covers); medical diagnostics (flow cells, slides, microplate bottoms, cuvette windows); mems devices (cap wafers, TGV substrates, motion-sensor lids).
If the part is easier to draw than describe, the custom glass machining 3D + 2D builder turns dimensions into an RFQ in a few minutes.
Useful companion pages: LED groove cover glass, glass hole micromachining, FTO conductive 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.
What do engineers most often leave off?
Which faces are optical, edge finish, and whether chips or bubbles matter – the three most-revised drawing items.
Is there a minimum order for how to specify a precision glass part?
No. Single prototypes are accepted, and pricing steps down at 10, 100 and 1,000 pieces.
Specifications on this page were last reviewed by our engineering team in August 2026.