A-axis Watch Sapphire single crystal glass lens rough material/
optical grade Sapphire Watch glass lens/ rough sapphire glass
plates for watch glass
ZMKJ / WUXI FINE CRYSTAL TECHNOLOGY Sapphire Crystal Watch Glass
Window Materials for High-class watches
Features of Keeppromise’s Sapphire:
Sapphire is scaled at Mohs hardness 9 ,the hardest next to diamond
.
It has the excellent endurance and eternal btilliance and transparency .
This is why it has become intimate as the window materials of
wristwatches with so many custoners all over the world .
| Thickness | 0.5-50mm |
| Size tolerance | ±0.03mm |
| Edge Finish | Ground and beveled |
| Surface Quality | 40-20 scratch-dig |
| Parallelism | ≤3 arc min (≤0.9 mrad) |
| Clear Aperture | >80% of central diameter |
| Hardness (Knoop) | 1370 kg mm-2 |
| Young's modulus | 3.4 x 1011 N m-2 |
| Thermal Limit | 22 W m-1 K-1 |
| Thermal expansion coefficient | 8.4 x 10-6 K-1 |
Feature:
Hardness is second only to diamonds
Much stronger than other optical materials (65,000 modulus of
rupture)
Extremely hard surface
High scratch resistance and wear.
Very wide optical transmission band from UV to Mid IR
Extremely high melting point
High electrical resistance
Chemical properties of stability
High thermal conductivity for a non-conductor, even better than
copper at cryogenic temperatures
High dielectric constant
Customized Colorful or White Sapphire Watch Glass
1. OEM Size and Design. Any shape is ok.
2. CE&Rohs Material. Europe, Japan,China, depend on your
requirements.
3. We can provide engineer drawing.
4. Printting logo is ok. Camera Lens
5. Fast delivery date.
6. High quality
Our company export some of watch glass to Europe and
USA；Japan......
We can provide the samples to check the quality. The Sample we have
available,free charge.
Application
Sapphire has become the preferred material for high-end watch
windows due to its remarkable durability and clarity. With a Mohs
hardness rating of 9, second only to diamond, sapphire is highly
resistant to scratches and wear, making it an ideal choice for
wristwatches that are subject to daily use and exposure to various
elements. The material’s exceptional hardness ensures that the
watch face remains pristine, preserving its aesthetic appeal over
time.
In addition to its durability, sapphire offers excellent brilliance
and transparency, allowing for clear visibility of the watch face
and enhancing the overall luxury feel of the timepiece. This
combination of strength and beauty makes sapphire a top choice for
prestigious watch brands around the world. Customers appreciate the
long-lasting clarity and the peace of mind that comes with knowing
their watch window will remain in perfect condition for years.
Keeppromise’s sapphire, with its superior endurance and elegance,
has garnered a strong reputation among watch enthusiasts. The use
of sapphire windows not only elevates the watch's functionality but
also enhances its visual appeal, making it a symbol of luxury and
reliability for discerning customers.
About the Delivery
FAQ
Q1. Are you a factory?
A1. Yes, we have a professional optical lens manufactruer in wuxi
city of China.
Q2. What is the MOQ of optical lens?
A2. No MOQ for customer if optical lens is in stock. if for customized size ,MOQ is 3-10pcs by case.
Q3: Can I customize the products based on my need?
A3.Yes, we can customize the material, specifications and optical
coating for your optical components based on your needs.
Q4. How can I get sample from you?
A4. Just send us your requirements, then we will send samples
accordingly.
Q5. How many days will samples be finished? How about mass
products?
A5. Generally, we need 1~2 weeks to finish the sample production.
As for the mass products, it depends on your order quantity.
Q6. What's the deliver time?
A6. (1) For inventory: the delivery time is 5 workdays after received
your payment.
(2) For customized products: the delivery time is 7 to 20 workdays.
According to the quantity.
Q7. How do you control lens quality?
A7. Producing process is in vacuum dust-free shop, like prepare
material, mixed material and take out . Four times quality checking
during production process.
Q8. How about your payment and quality service ?
A8. Usually 100％ payment before delivery, and if the products is disqualification and we will reback your
money .
