Borofloat 33 Glass Plates With Holes – Borofloat 33 (CTE 3.25 x 10^-6 /K, 350 nm – 2.0 um); Holes 0.15 – 100 mm in plates to 40 mm thick. No minimum order; DFM review included with every RFQ.
borofloat 33 glass plates with holes are ordered for mounting plates, feedthroughs and manifolds. The geometry envelope is Holes 0.15 – 100 mm in plates to 40 mm thick, held to position +/-0.02 mm, in Borofloat 33.
Specifications at a glance
| Material | Borofloat 33 (SCHOTT float production, wafer grade) |
|---|---|
| Thermal expansion (CTE) | 3.25 x 10^-6 /K |
| Service temperature | 450 C continuous |
| Transmission range | 350 nm – 2.0 um |
| Density | 2.23 g/cm3 |
| Knoop hardness | 480 kg/mm2 |
| Refractive index | 1.471 @ 587 nm |
| Stock thickness | 0.70 – 25.4 mm |
| Maximum blank size | 500 x 500 mm |
| Geometry | Glass Plates With Holes |
| Size envelope | Holes 0.15 – 100 mm in plates to 40 mm thick |
| Key tolerance | position +/-0.02 mm |
| RFQ inputs | PDF/DXF/STEP drawing, quantity brackets, surface and edge spec |
Manufacturing capability
One material, many routes: on Borofloat 33 we also quote dicing, polishing, ultrasonic machining, cnc machining, and multi-step drawings are the norm rather than the exception.
Production route: drilling, coring, laser cutting – selected per geometry and volume. Edge condition: optional chamfered hole entry.
Design guidance
Three items decide most of the cost and lead time on this work:
- Material note: float tin side must be tracked when parts see coating or bonding steps.
- Hold the controlling dimension (position +/-0.02 mm) and let secondary dimensions carry standard tolerance – it is the single biggest cost lever.
- 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
Orders for borofloat 33 glass plates with holes cluster in microfluidic devices (chips, manifolds, via plates, bonded stacks); led packaging (groove covers, phosphor carriers, package windows); machine vision (camera windows, ring-light diffusers, calibration plates). Background reading on the underlying material science: SCHOTT BOROFLOAT product page.
The fastest route to a quote is geometry: use the 3D builder below, draw a dimensioned 2D drawing from it, or open the site-wide custom glass machining 3D + 2D builder for fully custom parts.
Engineers scoping this work usually also review custom ITO glass, alkali-free display glass, edge grinding overview.
Common questions
Is there a minimum order for borofloat 33 glass plates with holes?
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.
Do parts ship with inspection data?
Dimensional reports, surface certificates and material certs per melt are available; specify the level on the RFQ.
Specifications on this page were last reviewed by our engineering team in September 2026.