Laser Cutting vs CNC Machining Glass: How to Choose: custom precision glass machined to drawing with inspection reports. Single-piece prototypes to production volumes, quoted from your drawing.
The laser cutting vs cnc machining glass: how to choose decision is really about thin free-form speed versus 3D feature depth. The short version: laser under 3 mm and for hole arrays; CNC for pockets, steps and thick sections.
Side by side
| Laser Cutting | CNC Machining | |
|---|---|---|
| Tolerance | +/-0.02 mm contour | +/-0.01 mm positional |
| Min feature | 0.10 mm hole diameter | 0.4 mm slot width |
| Finish | sealed edge, chip-free | Ra 0.4 um ground, optional polish |
| Thickness window | 0.03 – 6 mm | 0.5 – 50 mm |
| Strength | chip-free free-form contours and dense hole arrays in thin and ultra-thin glass | complex 3D geometry – pockets, steps, counterbores and compound edges in one setup |
| Limit | aspect ratio in a single pass tops out near 10:1; thicker sections shift to coring or ultrasonic work | internal corners carry a minimum radius equal to the smallest practical tool, typically R0.5 mm |
The decision axis is thin free-form speed versus 3D feature depth. Laser under 3 mm and for hole arrays; CNC for pockets, steps and thick sections.
Design guidance
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.
Where these parts end up
laser cutting vs cnc machining glass: how to choose shows up across semiconductor equipment (view ports, wafer carriers, plasma rings, chamber windows); microfluidic devices (chips, manifolds, via plates, bonded stacks); optical sensors (sensor windows, filter caps, lens covers).
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 special-shaped glass plates, wafer dicing process, Borofloat 33 selection guide.
Buyer questions, answered
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 should I choose?
As a rule: laser under 3 mm and for hole arrays; CNC for pockets, steps and thick sections. Borderline cases are worth a materials review with our engineers.
Specifications on this page were last reviewed by our engineering team in August 2026.