Engineered Jewel Bearings – Ruby / Sapphire (Al₂O₃)
We are a Korea-based engineering company specializing in precision jewel bearings for meters, watches, medical devices, and instruments. Our bearings are used where low friction, long life, and high reliability are critical.
Why customers choose us:
We solve application problems – not just take orders. Send us your drawing or describe your operating conditions (load, speed, temperature). We will recommend the optimal geometry, material, and surface finish.
We manage quality across the entire process. Production at our ISO9001-certified partner facility under our inspection. You get factory pricing with engineering oversight.
Low MOQ, fast sample turnaround. Sample orders from 10 pieces. Engineering samples ready in 5-7 days.
Typical applications we have supported:
Analog panel meters (ammeter, voltmeter, watt-hour) – Korea, Japan, EU markets
Water meters and flow meters – export to 8+ countries
- Mechanical watches and clocks – including OEM for luxury brands
Specifications at a glance:
Material: Synthetic ruby or sapphire (99.99% Al₂O₃)
Hardness: 9 Mohs (2300 HV)
Inner diameter: 0.10 – 5.00mm (±0.005mm)
Surface finish: Ra ≤ 0.02μm (mirror polish)
Operating temp: -50°C to +200°C
Custom shapes: cup, endstone, Vee, orifice, or any per drawing
Price range: $0.50 – $3.00/piece depending on size, quantity, and specification.
Ready to move forward?
Send us your bearing drawing or application requirements. We will reply within 24 hours with:
No drawing yet? Just describe your application and we will help.
