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  2. Jewel bearing - Wikipedia

    en.wikipedia.org/wiki/Jewel_bearing

    Ruby jewel bearings used for a balance wheel in a mechanical watch movement Cross-section of a jewel bearing in a mechanical watch. This type of donut-shaped bearing (red) is called a hole jewel, used for most of the ordinary wheels in the gear train. It is usually made of synthetic sapphire or ruby, press-fit into a hole in the movement's ...

  3. Incabloc shock protection system - Wikipedia

    en.wikipedia.org/wiki/Incabloc_shock_protection...

    Jewel bearing of a balance wheel, supported by a lyre-shaped spring. The Incabloc shock protection system is the trade name for a spring-loaded mounting system for the jewel bearings that support the balance wheel in a mechanical watch, to protect the wheel's delicate pivots from damage in the event of physical shock, such as if the watch is dropped.

  4. Tourbillon - Wikipedia

    en.wikipedia.org/wiki/Tourbillon

    In the three axis tourbillon movement, the 3rd (external) cage has a unique form which provides the possibility of using jewel bearings everywhere, instead of ball-bearings. This is a unique solution at this size and level of complication. [11] There are a few wrist and pocket watches that include the Triple Axis or Tri-Axial Tourbillon ...

  5. Mechanical watch - Wikipedia

    en.wikipedia.org/wiki/Mechanical_watch

    Jewel bearing and capstone used in balance wheel pivot Ordinary 'hole jewel' bearing. Jewel bearings were invented and introduced in watches by Nicolas Fatio (or Facio) de Duillier and Pierre and Jacob Debaufre around 1702 [13] [14] to reduce friction. They did not become widely used until the mid-19th century.

  6. Adamant Namiki Precision Jewel Co - Wikipedia

    en.wikipedia.org/wiki/Adamant_Namiki_Precision...

    Adamant Namiki uses integrated manufacturing, handling its products from the raw material, to processing, through to polishing. Industrial jewels, such as diamond, sapphire, and ruby, are used for jewel bearings, sapphire substrates, [4] [5] exterior watch parts, semiconductor wire bonding capillaries, nozzles, LTCC [6] (Co-fired ceramic) and so on.

  7. Adamant Co., Ltd. - Wikipedia

    en.wikipedia.org/wiki/Adamant_Co.,_Ltd.

    Started sales of jewel bearings for watches and clocks. 1959 - The Company Changed name to Adamant Kogyo Co., Ltd. 1960 - Began to manufacture jewelled bearings for watches. 1967 - Akita Factory was set up at Yuzawa City, Akita. 1969 - Started manufacturing and sales of component parts for medical equipment.

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