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A jewel bearing is a plain bearing in which a metal spindle turns in a jewel-lined pivot hole. The hole is typically shaped like a torus and is slightly larger than the shaft diameter. The jewels are typically made from the mineral corundum , usually either synthetic sapphire or synthetic ruby .
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 ...
Jewel Tower, a tower of the Palace of Westminster, in London, England; Fraternal jewels, the medals worn in both secular and religious fraternal organisations; Jewel beetles, the family Buprestidae; Jewel butterflies, various Lycaenidae; Jewel damselflies, the family Chlorocyphidae; Jewel bearing, a jewel-lined bearing commonly used in ...
A ball bearing. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.
Wheel bearing may refer to: Ball bearing; Bearing (mechanical) Fluid bearing; Jewel bearing; Journal bearing; Needle roller bearing; Plain bearing; Rolling-element bearing; Self-aligning ball bearing; Spherical roller bearing; Tapered roller bearing; Thrust bearing
Namiki Precision Jewel Co., Ltd. (並木精密宝石株式会社, Namiki Seimitu Houseki Kabushiki-gaisha) is a Japanese component manufacturing company based in Tokyo, Japan. The company was founded in 1939 as a manufacturer of synthetic sapphire jewel bearings for electrical measuring instruments.
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.
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