Custom Through-Hole Sapphire Bearings Precision Sliding Bearing
Based on Drawings
A sapphire bearing is a precision sliding bearing that uses
synthetic sapphire (single-crystal aluminum oxide, α-Al₂O₃) as its
core material, formed through high-temperature melt growth and
precision machining. With a Mohs hardness of 9 (second only to
diamond), it exhibits an extremely low friction coefficient,
excellent wear resistance, and strong corrosion resistance.
Recognized as an ideal bearing material for instruments, control
devices, and high-precision mechanical systems, it maintains
long-term stable operation under harsh conditions such as high
temperatures and strong corrosive environments.
Sapphire Bearings Characteristic
- Exceptional Hardness: Its outstanding hardness provides wear and impact resistance,
reducing friction loss during equipment operation and extending
service life.
- Strong Environmental Adaptability: It can withstand high and low temperatures (-200°C to 500°C),
humidity, chemical corrosion, and other complex working conditions.
- Stable Precision: The high surface finish ensures accurate positioning of equipment
during high-speed or micro-operation.
Sapphire Bearings Application Fields
- Precision Instruments: In laboratory spectrometers, analytical balances, and medical
equipment like CT scanners and blood analyzers, sapphire bearings
maintain stability during high-frequency, high-precision
operations, preventing measurement errors caused by wear.
- Industrial Automation: Used in servo motors of automated production lines, robotic arm
joints, and spindle components of CNC machine tools, their high
wear resistance reduces downtime for maintenance and improves
production efficiency.
- Equipment for Extreme Environments: Aerospace instruments (e.g., gyroscopes) can withstand
high-altitude low temperatures and low pressure; deep-sea
exploration equipment (e.g., underwater robots) can resist seawater
corrosion; outdoor meteorological monitors can endure weather
exposure, ensuring continuous and reliable data acquisition.
- Consumer Electronics & High-End Equipment: In the movements of smartwatches and mechanical watches, sapphire
bearings ensure accurate timekeeping; in laser cutting equipment
and optical communication modules, they reduce component wear and
extend the equipment's service life.
Sapphire Bearings Key Data
| Parameter Category | Specific Value/Characteristic |
| Material Composition | Synthetic Sapphire (α-Al₂O₃), purity ≥99.99% |
| Mohs Hardness | Level 9 |
| Friction Coefficient | 0.08–0.12 (against steel) |
| Temperature Range | -200°C ~ +1800°C |
| Surface Roughness | Ra ≤0.005μm (mirror-grade polish) |
| Corrosion Resistance | Resistant to acids/alkalis (except HF), oxidation |
| Thermal Conductivity | 25.12 W/m·K (@100°C) |
| Dielectric Constant | 11.5 (∥c-axis), 9.3 (⊥c-axis) |
1. Q: How does a jewel bearing work?
A: A jewel bearing operates by allowing a metal spindle to rotate
within a pivot hole lined with a hard gemstone material (like
synthetic sapphire or ruby), which minimizes friction through its
ultra-smooth, hard surface.
2. Q: What are the types of bearings?
A:Bearings are primarily categorized into two main types: rolling
element bearings (such as ball bearings and roller bearings) and
plain/sliding bearings (like jewel bearings or fluid bearings),
each designed to support different load directions and motion
requirements.
Tags: # Custom Through-Hole Sapphire Bearings, #Sapphire Bearings, #Double-Side Polished, #High-Purity, #Optical Component,
#Corrosion-Resistant, #High-Temperature Rated, #Mohs Hardness 9, #Precision Instrumentation, #Aluminum Oxide,
Al₂O₃, #Sapphire, #Precision Sliding Bearing, #Bearing Based on
Drawings
