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​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​
​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​
​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​
​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​
​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​
​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​
Specifications
Brand Name :
ZMSH
Model Number :
Ruby Bearings
Certification :
rohs
Place of Origin :
CHINA
MOQ :
25
Price :
by case
Payment Terms :
T/T
Delivery Time :
2-4 weeks
Packaging Details :
package in 100-grade cleaning room
Material​​ :
Synthetic corundum (Al₂O₃), chromium-doped red
Static Friction Coefficient​​ :
0.10–0.15
Temperature Range​​ :
-200°C to +800°C
Corrosion Resistance​​ :
Resists acids/alkalis, oxidation
Surface Roughness​​ :
Ra <0.3 nm (optical grade polishing)
Size/Shape :
​​Customized
Description

​​Ruby Bearing Abstract

​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​

A ruby bearing is a sliding bearing made from synthetic corundum (aluminum oxide, Al₂O₃), precision-machined into spherical, conical, or straight-hole structures. It is widely used in precision instruments, watch movements, and high-sensitivity equipment. Its core functions include reducing friction between metal components, enhancing operational precision and service life, and offering corrosion and high-temperature resistance.

​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​

Ruby Bearing Key Features​

1. Material Properties​​

  • ​​High Hardness​​: Mohs hardness of 9, Knoop hardness of 1,800, far exceeding metal bearings in wear resistance.
  • ​​Low Friction Coefficient​​: Static friction coefficient ranges from 0.10–0.15 (vs. 0.35 for brass against steel), significantly reducing energy loss.
  • ​​Corrosion Resistance​​: Stable crystalline structure of alumina ensures resistance to acids, alkalis, and oxidation in harsh environments.

2. ​​Performance Advantages​​

  • ​​High-Temperature Tolerance​​: Withstands temperatures above 800°C, with low thermal expansion and excellent thermal stability.
  • ​​Lubrication-Free​​: Naturally smooth surface eliminates the need for long-term lubrication.

3. ​​Application Adaptability​​

  • ​​Low-Load Scenarios​​: Designed for lightweight, high-sensitivity applications such as watch escapement mechanisms and meter pointer pivots.
  • ​​Customizability​​: Supports spherical, conical, and straight-hole geometries to meet diverse mechanical requirements.

​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​

​​Ruby Bearing Applications​

1. Watch Movements​​

  • Critical components like balance wheel pivots and escapement wheels reduce friction and improve timekeeping accuracy (17–25 jewels in a typical mechanical watch).

2. ​​Precision Instruments​​

  • Used in galvanometers, gyroscopes, and micrometers to ensure stable and sensitive pointer movement.

3. ​​Military and Aerospace​​

  • High-precision navigation instruments and gyro-stabilized platforms operating in extreme temperatures and vibrations.
​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​

​​Ruby Bearing Key Parameters​

​​Parameter​​ ​​Value/Characteristic​​
​​Material​​ Synthetic corundum (Al₂O₃), chromium-doped red
​​Static Friction Coefficient​​ 0.10–0.15 (ruby vs. steel)
​​Temperature Range​​ -200°C to +800°C
​​Corrosion Resistance​​ Resists acids/alkalis, oxidation
​​Surface Roughness​​ Ra <0.3 nm (optical grade polishing)
​​Typical Dimensions​​ Outer diameter: 0.8–10 mm, height: 0.6–5 mm

Other Bearing Samples

1. Ruby Bearings Al₂O₃ Single Crystal for Precision Instruments and Meters

​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​

2. High-Precision Customized Sapphire Bearings Low Friction Industrial Applications

​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​

Ruby Bearing Q&A

1. Q: Why is ruby used for bearings?​​

A: Ruby is used for bearings due to its exceptional hardness (Mohs 9), low friction, and wear resistance, enabling precision and durability in high-stress applications.

​​2. Q: What are jewel bearings used for?​​

A: Jewel bearings are used in precision instruments (e.g., watches, gyroscopes), medical devices, and industrial equipment to reduce friction and enhance accuracy.


Tags: #Customized Ruby Bearings, #Customized, #​​Double-Side Polished, #High-Purity, #Optical Component, #Corrosion-Resistant, #High-Temperature Rated​​, #Mohs Hardness 9, #Precision Instrumentation​​, #Aluminum Oxide, Al₂O₃, #Sapphire

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​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​

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Product Detail
Brand Name :
ZMSH
Model Number :
Ruby Bearings
Certification :
rohs
Place of Origin :
CHINA
MOQ :
25
Price :
by case
Contact Supplier
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​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​
​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​
​​Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation​​

SHANGHAI FAMOUS TRADE CO.,LTD

Verified Supplier
8 Years
shanghai, shanghai
Since 2013
Business Type :
Manufacturer, Agent, Importer, Exporter, Trading Company
Main Products :
Gallium Nitride Wafer, Sapphire Wafer, SiC Substrate
Total Annual :
1000000-1500000
Certification Level :
Verified Supplier
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