Thanks to its unique know-how, CIMD is able to machine synthetic monocrystalline / polycrystalline ruby, sapphire and other crystalline materials, as well as ceramics and hard materials.
Bearing for watch movement
Synthetic ruby is the material of choice for the manufacture of watch stones and bridges.
Set at the heart of a watch movement, the ruby plays a vital role in reducing friction between the jewel and the metal pivot. Thanks to its high mechanical strength and ability to withstand heavy loads, it helps to limit wear and prevent seizing that can occur between metal components.
Technical specifications:
Dimensions :
- Inside diameter from 7 to 360 hundredths
- Outside diameter from 40 to 465 hundredths
- Height from 11 to 300 hundredths
General tolerances :
- Hole diameter: 0/+2μm
- Outer diameter : 0/+4μm
- Height: ± 10μm
- Olive hole: 0/+3μm














