Colored Sapphire Crystal Watch Case for Large-Size Processing with 0.5-200mm Thickness and 1370 kg/mm² Hardness
This colored sapphire crystal watch case is engineered for large-size processing applications using the advanced Kyropoulos (KY) method. Sapphire material, nearly as hard as diamond, provides exceptional scratch resistance and durability for premium timepieces.
| 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 high-speed movement and pressure loads
- Excellent thermal stability maintains performance across temperature variations
- Superior chemical resistance prevents corrosion and moisture absorption
- High optical transmission rate for ultraviolet to medium infrared radiation
- Optimal optical characteristics with minimal scattering and uniform refractive index
- Meets large window requirements for premium watch applications
- Rare source manufacturer of color sapphire boule with proprietary KY and CZ methods
- Specialized expertise in sapphire watch case processing and polishing
- Custom production capabilities with CAD and 3D drawing support
- Experienced technical team with skilled craftsmanship
We are a professional sapphire products factory with integrated trading capabilities.
Yes, we specialize in custom production and OEM work using CAD and 3D drawings.
Yes, samples are available with charge, refundable on orders exceeding 100 pieces.
Standard delivery is 5-8 weeks for 200 pieces, depending on processing complexity.
T/T payment is preferred for all transactions.
Most shipments are handled via air courier services including DHL and FedEx.
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.