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 |
|---|
DFM notes from the shop floor
Before sending the RFQ, check these against your drawing:
- 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.
Application context
how to specify a precision glass part shows up across mems devices (cap wafers, TGV substrates, motion-sensor lids); machine vision (camera windows, ring-light diffusers, calibration plates); medical diagnostics (flow cells, slides, microplate bottoms, cuvette windows).
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.
For adjacent specifications, see custom FTO glass, material selection guide, optical glass options.
Frequently asked questions
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.
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.
Specifications on this page were last reviewed by our engineering team in September 2026.