Figure 1. High-Precision Al₂O₃ Crystal Components

Material Composition & Attributes:
We utilize ultra-pure α-Al₂O₃ single crystals. This material is renowned for its near-diamond hardness (Mohs 9.0), resulting in exceptional resistance to abrasive wear. Furthermore, it offers a negligible friction coefficient and superior chemical inertness against corrosive elements.

Structural Configuration:
Unlike conventional ball bearings, ruby jewels are typically fashioned as sliding contact bearings. Common geometries include Ring Jewels (Through-hole), Cup Jewels, and V-Notch Jewels. These are frequently mounted into brass, steel, or aluminum housings to create a robust, ready-to-install assembly.

Evolution of Utility:
Originally developed for the horological industry to support balance wheels and escapement levers in mechanical timepieces, this technology has evolved. Today, it serves as the backbone for micro-precision instrumentation where longevity, accuracy, and minimal friction are non-negotiable.

The operational advantages of our ruby bearings are derived from the intrinsic physics of synthetic sapphire:

1. Metering & Gauges

Standard in electricity meters, fluid flow sensors, and pressure gauges where low friction enables high measurement sensitivity.

2. Precision Horology

The "Jewels" in mechanical watches. Essential for reducing friction in the escapement and balance wheel assembly.

3. Aerospace Systems

Critical for the stability of gyroscopes, inertial guidance units, and optical targeting systems in defense applications.

4. Medical Technology

Used in blood analyzers and surgical tools due to their biocompatibility and ability to withstand sterilization.

5. Semiconductor Fab

Provides non-magnetic, dust-free support for wafer handling robotics and lithography stages.

6. Metrology Equipment

Key components in CMM probes, dial indicators, and laser alignment tools.

Q1: Is the material natural ruby or synthetic?

A: We strictly use Synthetic Sapphire (Al₂O₃). While chemically identical to natural gems, lab-grown crystals offer superior structural purity and consistent hardness required for industrial precision.

Q2: How do jewel bearings improve instrument life?

A: By providing a surface harder than steel with a mirror finish, they drastically minimize friction. This prevents the "pivotal wear" that typically causes instruments to lose accuracy over time.

Q3: Can these replace stainless steel bearings?

A: Yes. In applications requiring zero corrosion, non-magnetic properties, and lubrication-free operation, ruby bearings are vastly superior to steel alternatives.