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Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation

Name: Customized Ruby Bearings Mohs Hardness 9 for Precision Instrumentation
Brand: SHANGHAI FAMOUS TRADE CO.,LTD
SKU: Ruby Bearings
Price: 550.00 USD
Availability: InStock

Brand Name:	ZMSH
Model Number:	Ruby Bearings
MOQ:	25
Price:	by case
Delivery Time:	2-4 weeks
Payment Terms:	T/T

Detail Information

Product Description

Detail Information

Place of Origin:

CHINA

Certification:

rohs

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

Packaging Details:

package in 100-grade cleaning room

Highlight:

custom ruby bearings for precision instruments

ruby bearings with Mohs hardness 9

sapphire bearings for instrumentation

Product 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.

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.

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.

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

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

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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