Round
Crafted from high-purity monocrystalline sapphire (Al₂O₃ ≥ 99.99%), this round crystal offers a powerful combination of optical clarity, surface hardness, and chemical resistance. Its customizable diameter (Φ10–50 mm) and thickness (0.3–3.0 mm) make it compatible with a wide range of mechanical watches, diver watches, and smartwatches, ensuring a precise fit across diverse designs.
With light transmittance exceeding 90% and optional coatings such as AR, AF, and DLC, the crystal performs reliably in harsh environments—resisting scratches, pressure, and saltwater corrosion. Each unit meets ISO9001, BSCI, and RoHS standards, and is delivered with export-grade packaging and technical support for global OEM/ODM projects.
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| Specification | Details |
|---|---|
| Material | Monocrystalline Sapphire (Al₂O₃ ≥ 99.99%) |
| Shape | Round (Flat / Domed available) |
| Diameter Range | Φ10 mm – Φ50 mm (customizable) |
| Thickness Range | 0.3 mm – 3.0 mm (customizable) |
| Hardness | HV700 – HV1800 |
| Light Transmittance | >90% (Visible Spectrum) |
| Edge Finish | Polished / Chamfered / Beveled / Rounded |
| Coating Options | AR / AF / UV / ITO / DLC (optional) |
| Surface Treatment | Electroplating / Laser Marking / Screen Printing |
| Tolerance | ±0.02 mm – ±0.10 mm |
| Packaging | Anti-scratch layered tray + export carton |
| Lead Time | 5–15 days (standard) / 20–45 days (custom orders) |
| Certifications | ISO9001 / BSCI / RoHS |
| Application | Watches, Wearables, Optical Windows |
Overview
The Round Sapphire Watch Crystal is precision-engineered to meet the demands of high-end watchmaking and wearable device manufacturing. Made from ultra-pure monocrystalline sapphire, it combines durability, optical clarity, and resistance to environmental stressors.
Designed for use in mechanical watches, diver watches, and smart devices, this crystal maintains excellent visibility and structural integrity even in challenging conditions like saltwater, high pressure, and rapid thermal fluctuations.
🔍 Key Benefits at a Glance
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Exceptional Hardness — Rated HV700–HV1800, second only to diamond.
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Superior Clarity — Light transmittance >90%, distortion-free viewing.
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Custom Precision — Diameter and thickness tailored to your build.
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Multiple Coatings Available — AR, AF, UV, ITO, DLC for specialized use.
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Ready for Integration — Compatible with common bezel mounting designs and UV bonding methods.
🔧 Technical Detail Snapshot
| Feature | Value/Range |
|---|---|
| Material | Monocrystalline Sapphire (Al₂O₃ ≥ 99.99%) |
| Diameter | Φ10 mm – Φ50 mm (customizable) |
| Thickness | 0.3 mm – 3.0 mm |
| Edge Finish | Polished, Chamfered, or Rounded |
| Surface Treatment | Electroplated / Printed / Laser Marked |
| Dimensional Tolerance | ±0.02 mm – ±0.10 mm |
📦 Application Scenarios
“Where precision meets durability.”
This crystal is ideal for:
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Luxury Watchmakers requiring flawless optics and consistent mechanical fit.
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Diver Watch Designs where anti-corrosion and pressure resistance are critical.
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Smartwatch OEMs seeking custom-form sapphire lenses with coating and bonding compatibility.
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Optical Modules & Instruments requiring high transmission and durability.
✅ Compliance & Manufacturing Confidence
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ISO 9001 Certified Production
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RoHS + BSCI Compliance
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Global OEM/ODM Delivery Support
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Standard Lead Time: 5–15 days
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Custom Production: 20–45 days
Packaging follows strict export-grade protocols: anti-scratch layering, moisture barriers, and tray systems to ensure safe delivery worldwide.
