TAOMSUN supplies premium sapphire and ruby through-hole jewel bearings for precision instruments. Featuring excellent wear resistance and low friction. Available in plain straight-hole, arc-hole, single/double oil-groove, and convex types. Bore sizes range from Ø0.08mm to Ø5.00mm with tight tolerances down to 0.004mm. Ideal for timing instruments, dial indicators, and precision measuring systems. Custom OEM/ODM supported.

Sapphire & Ruby Through-Hole Jewel Bearings: The Core of Precision Instruments

Supplier:TAOMSUN ｜Overseas Tech Support:METICULAB (Korea) ｜Sourced fromISO-certified Partners

In precision instruments, micro-motors, and automation control systems, the friction and wear of the rotational support directly determine measurement accuracy and service life. TAOMSUN through-hole jewel bearings are machined from synthetic ruby and sapphire single crystals, offering excellent wear resistance, low friction, and long service life. We offer a wide range of structural types to match different assembly methods, rotational speeds, and lubrication requirements.

1. Core Technical Advantages

• High Hardness & Wear Resistance:Mohs hardness of 9 ensures long-term stability without deformation, extending the lifespan of the instrument.
• Ultra-low Friction:With precise bore clearance, it effectively reduces starting torque and improves instrument sensitivity.
• Chemical & Non-magnetic:Immune to acid/alkali corrosion and non-magnetic, avoiding interference with sensitive internal magnetic fields.
• Flexible Oil-Groove Options:Available with single, double, conical, or arc grooves to ensure stable lubrication at high speeds.
• Micro-hole Expertise:Capable of machining extremely small bores down to Ø0.08 mm with high precision.

2. Technical Specifications

Handling Notes:Jewel bearings are hard but brittle. Avoid impact, dropping, or point-loading on the bore edge. Store in original packaging before assembly. For ultra-small bores (Ø0.08–Ø0.20 mm), please share the length-to-diameter ratio so we can evaluate process feasibility.

3. Main Applications

⏱️ Timing & Precision Instruments:Watches, clocks, mechanical stopwatches, aircraft instruments, and gyroscopes.

📊 Industrial Measuring Equipment:Water meters, electricity meters, tachometers, dial indicators, and micrometers.

⚙️ Fluid Control:Wear-resistant guidance and support for micro flow meters and precision valves.

4. Payment & Lead Time

Payment:100% T/T advance payment before shipment.Lead time:15-30 days for custom instruments (excluding international shipping).

5. Customization & Service

Suzhou TAOMSUN Scientific Instruments Co., Ltd.provides professional supply chain integration for high-end precision components. We offer custom-designed jewel bearings based on your load, speed, and lubrication requirements. Please send us your technical drawing for accurate evaluation and quotation.