Sapphire Balls High-Precision Components Bearings Optical High Compressive

Short Description:

Our expertise lies in producing ultra-precise sapphire and ruby spheres with diameters spanning from 0.60 mm to 150 mm. Crafted from synthetic single-crystal aluminum oxide (Al₂O₃), these precision balls feature exceptional hardness, durability, and chemical stability. Ranking Mohs 9 in hardness, sapphire balls are second only to diamond, ensuring reliable operation even in the harshest conditions.

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Features

Detailed Diagram

Overview of Sapphire Balls

We specialize in producing high-precision sapphire and ruby balls with diameters ranging from 0.60 mm to 150 mm. Made from synthetic single-crystal aluminum oxide (Al₂O₃), these spheres offer:

Exceptional hardness (Mohs 9, second only to diamond)
Outstanding wear resistance
Superior chemical stability

Thanks to these properties, sapphire balls deliver long-lasting performance even in extreme conditions.

Widely used in precision engineering, fluid control, optics, and measurement technologies, they outperform steel, glass, and ceramics by combining durability, chemical inertness, and optical transparency.

Material Properties

Material: Synthetic Sapphire / Ruby (Al₂O₃)
Hardness: Mohs 9 (extremely hard, scratch-resistant)
Melting Point: 2045 °C (3713 °F)
Refractive Index: No = 1.768, Ne = 1.760

Key Features:

High resistance to mechanical wear
Chemically inert to most acids, alkalis, and solvents
Wide optical transmission range (200 nm – 5 μm)
Stable under high pressure and thermal cycling
Available in multiple diameters and tolerances upon request

Applications

Special Bearings: Low-friction, long-life components in lubrication-limited systems
Medical & Chemical Devices: Resistant to aggressive reagents, ensuring reliability
Flow Control: Precision balls in pumps, valves, and flow meters
Writing Instruments: Precision tips for fountain pens and ballpoint pens
Optical & Measurement Tools: Gauges, scanners, and fiber optic connectors requiring accuracy and stability

Specifications

Property / Parameter	Specification
Diameter Range	0.60 mm – 150 mm
Diameter Tolerance	± 2 nm max.
Roundness Tolerance	< 0.0005 mm
Surface Quality	10/5 max. (MIL-PRF-13830B)
Roughness (Ra)	≤ 2 nm
Refractive Index	No = 1.768, Ne = 1.760
Hardness	Mohs 9
Melting Point	2045 °C (3713 °F)
Inspection	100% microscopic inspection
Packaging	Blister tray, glass bottles, or vacuum-sealed bags
Cleanroom Standard	Fully inspected and packaged in cleanroom conditions

Product Advantages

Durability: Mohs 9 hardness ensures extremely long service life
Chemical Stability: Performs reliably in corrosive environments
Precision: Ultra-tight tolerances (±2 nm, roundness <0.0005 mm)
Versatility: Applied across aerospace, semiconductor, biomedical, and electronics industries
Customization: Wide range of sizes, tolerances, and finishes available

FAQ

Q1: What is a sapphire ball?
A sapphire ball is a precision sphere made from single-crystal Al₂O₃. It combines extreme hardness, wear resistance, chemical stability, and optical transparency, making it suitable for industrial, optical, and scientific use.

Q2: How do sapphire balls compare to steel or ceramic balls?

Hardness: Mohs 9 (second only to diamond)
Chemical Resistance: Inert to most acids, alkalis, and solvents
Temperature Stability: Up to 1900 °C in air, 2000 °C in inert atmosphere
Optical Transparency: Transmission from UV (0.2 μm) to IR (5.5 μm)
Non-Magnetic & Electrically Insulating

Q3: What are the main applications?

Industrial Bearings
Medical Devices (valves, pumps, biocompatible parts)
Semiconductor & Electronics (spacers, wear-resistant components)
Optics & Lasers (calibration, light transmission)
Scientific Research (high-pressure cells, microfluidics, extreme testing)

About Us

XKH specializes in high-tech development, production, and sales of special optical glass and new crystal materials. Our products serve optical electronics, consumer electronics, and the military. We offer Sapphire optical components, mobile phone lens covers, Ceramics, LT, Silicon Carbide SIC, Quartz, and semiconductor crystal wafers. With skilled expertise and cutting-edge equipment, we excel in non-standard product processing, aiming to be a leading optoelectronic materials high-tech enterprise.