Synthetic Sapphire Crystal Watch Case 0.5-200mm Thickness with 1370 kg/mm² Hardness and Advanced Optical Properties
Sapphire crystal, nearly as hard as diamond, offers exceptional scratch resistance and durability for luxury watch applications. Our advanced manufacturing techniques enable precise cutting and shaping into various forms including round, tonneau, square, and custom designs.
- Direct observation capability during crystal growth process
- Free liquid surface growth minimizes crystal stress
- Oriented seed crystal and necking process for superior quality
- Rapid growth rates while maintaining crystal integrity
| Property | Specifications |
|---|---|
| Thickness | 0.5-200mm |
| Size Tolerance | ±0.01 |
| Edge Finish | Ground and beveled |
| Surface Quality | 40-20 scratch-dig |
| Surface Flatness | λ/4@633nm |
| Parallelism | ≤3 arc min (≤0.9mrad) |
| Clear Aperture | ＞80% of central diameter |
| Hardness (Knoop) | 1370 kg/mm² |
| Young's modulus | 3.4×10¹¹ N/m² |
| Thermal Limit | 22 W/m/K |
| Thermal expansion coefficient | 8.4×10⁻⁶/K |
- High mechanical strength withstands speed pressure loads
- Excellent thermal stability for temperature shock resistance
- Superior chemical stability against corrosion and moisture
- High optical transmission from UV to medium infrared
- Minimal optical scattering with uniform refractive index
- Capable of meeting large window requirements
- Direct manufacturer of color sapphire boule
- Proprietary CZ and KY crystal growth equipment
- Custom production based on client CAD/3D drawings
- Precision sapphire processing and polishing expertise
- Experienced technical team with skilled craftsmanship
We operate as both a professional sapphire products factory and trading company.
Yes, we specialize in custom production and OEM work. CAD or 3D drawings are required.
Samples are available with charge, refundable on orders exceeding 100 pieces.
Standard delivery for 200 watch cases is 5-8 weeks, depending on processing complexity.
T/T payment is preferred.
Primarily via air freight services including DHL and FedEx.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.