Sapphire Watch
Zhongding Optical has been a qualified supplier to premium and luxury watch brands since 2009. We manufacture the full range of sapphire watch components in-house — from crystal faces and bezels to dials and case components — with annual output exceeding 5 million pieces.
The main transparent face of the watch. Sapphire offers Mohs 9 hardness — scratch-resistant even against steel. Supplied polished flat or with domed profile.
- Round, tonneau, cushion, freeform shapes
- Flat, single-dome, double-dome profiles
- AR anti-reflection coating available
- Anti-fingerprint coating available
- Thickness from 0.5 mm to 5 mm
The ring frame surrounding the dial. Machined to extremely tight tolerances for perfect assembly fit. Available polished, satin, or with graduation markings.
- Dimensional tolerance ±0.01 mm
- Dive-watch graduated bezel (silk-printed or laser-engraved)
- Coloured sapphire bezel inserts available
- Fixed and rotating bezel types
Skeletal or solid sapphire dials for premium watch movements. Fully transparent or with printed hour markers, indices, and brand text.
- Polished or sandblasted surface finish
- Silk-screen printed indices and text
- Custom cut-outs for sub-dials
- Compatible with luminous coating application
Exhibition case backs revealing the movement. Also: crown guards, pushers, tube inserts — complex 3D geometries machined on 5-axis CNC.
- Round and freeform exhibition windows
- Optical-grade polishing (view movement clearly)
- Gasket groove machining for waterproofing
- CNC-machined 3D case components
Standard Specifications
| Parameter | Range / Value |
|---|---|
| Material | Synthetic sapphire (Al₂O₃), single crystal, optical grade |
| Hardness | 9 Mohs (2000 Vickers) |
| Diameter | 5 mm – 60 mm (custom sizes available) |
| Thickness | 0.3 mm – 8 mm |
| Dimensional Tolerance | ±0.01 mm |
| Surface Roughness (Ra) | ≤ 0.5 nm (optical polish) |
| Scratch / Dig | 40-20 standard · 20-10 premium |
| Coatings Available | AR (single/multi-layer) · Anti-fingerprint · DLC |
| Sample Lead Time | 7 – 15 business days |
| Production Lead Time | 15 – 30 business days (volume-dependent) |
| MOQ | No hard MOQ — prototype orders welcomed |