Sapphire Crystal for Watch
Material: Sapphire Crystal
Color: Clear, Blue, Red, etc.
Logo Print: According to customers' requirements (Metallization, Printing, Laser Engraving, etc.).
Coating: AR Coating (according to customers' requirements).
MOQ: 100 pcs.
Production Lead Time: 15-25 days.
Sample Lead Time: 7-15 days.
Product Features:
· Sapphire optical windows are ideal for applications where high pressure, vacuum, or corrosive atmospheres are a consideration.
· Sapphire, a single crystal form of Al2O3, is resistant to attack by strong acids due to its high dielectric constant.
· It has high compressive strength and a high melting point.
Specifications:
Parameter | Specification | Tolerance |
Material | Synthetic Sapphire Crystal (Al₂O₃) | ASTM F2356 |
Hardness (Vickers) | 1800-2000 HV | ±50 HV |
Surface Flatness | < 0.005mm | DIN 876 |
Diameter Range | 25mm - 52mm (Custom: 5mm-60mm) | ±0.01mm |
Thickness Range | 0.8mm - 4.0mm | ±0.02mm |
Edge Treatment | Polished, Beveled, Flat (Per assembly specs) | -- |
AR Coating | Optional Single/Double Side (Anti-Glare/VIS) | MIL-C-675C |
Application
· Watch glass, watch case, watch dials
Quality Control:
1. Pre-production samples can be available before production if you need.
2. Production will be processed by both machine and skilled handmade workers.
3. The extra pieces will be ready as backup products.
4. The products will be double-checked before the final packing.
