high precision mechanical watch jewel bearings
- Category: >>>
- Supplier: Chongqing CYS Machinery Co. Ltd.
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Product Overview
Description
Products Description
Synthetic ruby/sapphire bearing
Synthetic Sapphire bearing are made of synthetic sapphire/ruby.
They are largely used in heavily corrosive environment and optical fiber communication because of its anticorrosion, wearable and fine transmission characteristics.
Balls measuring head jewels are used as insulated measure head on precise instruments.
Specification
Material
MAN MADE CORUNDUM PROPERTY | ||||
General | Chemical Formula | Al2O3 | ||
Crystal System | Trigonal | |||
Class | Hexagonal-scalenohedral | |||
Melting Temperature | 2030℃ | |||
Thermal | Thermal Expansion | Parallel to C-axis: 6.7× 10-6 | ||
Perpendicular to C-axis: 5.0×10-6 | ||||
Specific Heat | 0.18 Cal/gmoK（25℃） | |||
Mechanical | Density | 3.98 ~ 4.1g/cm3 | ||
Hardness | 9Moh’s Scale | |||
（Hv）≥1700kg/mm2 | ||||
Modulus Of Elasticity | 340-380Gpa | |||
Compressive Strength | 2.1Gpa | |||
Tensile Strength | 0.19Gpa | |||
Optical | Index of Refraction | Parallel to C-axis:1.769 | ||
Perpendicular to C-axis:1.76 | ||||
Index of IR Transmission | 85% | |||
Electrical | Electrical Resistance | 1016 Ω/cm(25°c) | ||
Dielectric Constant | 7.5-10 | |||
Chemical | Can not be corroded by acid or alkali at normal temperature, only can be corroded by HF at 300℃ | |||
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Packing and shipment
1. vaccum packaging
2.packing with bubble film
3. with suitable boxes
We will choose the most suitble express company to promise the shiping time and to save money for our customers.
Our Workshop
Company Profile
Chongqing CYS Machinery Co., Ltd Located in Chongqing - one of the largest industrial cities in China.
we focus on designing, producing of the synthetic sapphire and ruby bearing, marine equipments etc. more than 15 years. and have rich experice in importing and exporting.
To explore new market for our products, our company often launches various products worldwide as well.
We are the company with first-rate teamwork and our motto is "to foster sustainable development, to set up sincere reputation, to improve service, to optimize investing environment, to form close strategic partnerships with customers, to serve customers wholeheartedly and to develop together with customers".
Now, facing the keen competition of the market, and with rich experience in international trade, we have a high reputation, good quality products and competitive price. We have had cooperation with worldwide enterprises. We hope that our work can make your business perfect. We are looking forward to establishing relationships with you in the near future.
we focus on designing, producing of the synthetic sapphire and ruby bearing, marine equipments etc. more than 15 years. and have rich experice in importing and exporting.
To explore new market for our products, our company often launches various products worldwide as well.
We are the company with first-rate teamwork and our motto is "to foster sustainable development, to set up sincere reputation, to improve service, to optimize investing environment, to form close strategic partnerships with customers, to serve customers wholeheartedly and to develop together with customers".
Now, facing the keen competition of the market, and with rich experience in international trade, we have a high reputation, good quality products and competitive price. We have had cooperation with worldwide enterprises. We hope that our work can make your business perfect. We are looking forward to establishing relationships with you in the near future.
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