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  6. Gemstones for automobiles (alumina bearings)

Gemstones for automobiles (alumina bearings)

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last updated:Jan 28, 2026

Citizen Finedevice Co.,Ltd
Citizen Finedevice Co.,Ltd
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Achieving low friction, Citizen Fine Devices' gemstone (alumina bearings)

In the automotive industry, there is a demand for improved fuel efficiency and enhanced durability of components. Particularly for movable parts such as engines and transmissions, it is important to reduce friction resistance and suppress wear. High friction can lead to decreased energy efficiency and potentially shorten the lifespan of components. Citizen Fine Devices' gem (alumina bearings) addresses these challenges with its high wear resistance and low friction characteristics. 【Application Scenes】 - Bearings inside the engine - Bearings inside the transmission - Steering mechanism 【Effects of Implementation】 - Improved fuel efficiency due to reduced friction resistance - Extended lifespan of components - Achieving smooth operation

    Plastic bearings
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Gemstones for automobiles (alumina bearings)

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2021-09-30_09h45_40.png
  • Related Link - https://cfd.citizen.co.jp/aluminaruby/
  • Special site - Product/service details - https://pr.mono.ipros.com/cfd-citizen/product/

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【Features】 - High wear resistance - High dimensional accuracy - Transparency close to that of synthetic ruby - Consistent processing for a variety of products and mass production - Provision of near-net-shape blanks with dimensions close to completion 【Our Strengths】 Citizen Fine Devices leverages the technology cultivated over many years in the field of functional components that require small size, precision, and high detail to provide high value-added microdevice products. Through a consistent production line from process design to machining, assembly, and functional testing, along with the unique development of our own processing machines, we have supplied small, high-precision components to our customers for many years.

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【Usage Examples】 ■Movement for wristwatches ■Signal indicator ■Analog meter *For more details, please refer to the PDF document or feel free to contact us.

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Aluminaruby (alumina bearing)

Aluminaruby (alumina bearing)

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High-performance, high-precision ceramic components of Citizen Fine Devices.

High-performance, high-precision ceramic components of Citizen Fine Devices.

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Citizen

Citizen Finedevice Co.,Ltd

Ceramics

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The area where Citizen Fine Devices demonstrates its strength is in the realm of functional components that require small size, precision, high accuracy, and high detail. We believe that our mission is to continue providing high-value-added microdevice products by leveraging the unique technologies we have developed over many years. Utilizing metal processing technology rooted in watch manufacturing, we have consistently supplied small, high-precision components to our customers for many years through a fully integrated production line that encompasses process design, machining, assembly, and functional testing, along with the unique development of our own processing machines. Additionally, mass-producing components with high precision and efficiency using brittle materials is also one of our core technologies. By integrating material technology with ultra-precision machining, thin-film technology, and bonding technology, we produce not only high-precision components such as ceramics and quartz but also high-quality functional device products like liquid crystal devices and sensing devices. Continuing to provide high-value-added products to the market is a significant dream for our employees. We will contribute to the creation of new value through manufacturing driven by the challenge spirit of each individual, working towards the realization of that dream.

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