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  6. 【For precision measuring instruments】Gemstones (Alumina bearings)

【For precision measuring instruments】Gemstones (Alumina bearings)

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last updated:Jan 28, 2026

Citizen Finedevice Co.,Ltd
Citizen Finedevice Co.,Ltd
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Transparency that is almost indistinguishable from synthetic ruby, supporting high-precision measurements.

In the precision measurement equipment industry, it is important to minimize friction and wear of bearings in order to obtain high-precision measurement results. Especially in measuring instruments that capture minute movements, the performance of the bearings greatly affects measurement accuracy. If the quality of the bearings is low, measurement errors may occur, leading to the possibility of obtaining inaccurate data. Citizen Fine Devices' gem (alumina bearings) achieve high wear resistance and high dimensional accuracy, contributing to the performance improvement of precision measurement instruments that require high resolution. 【Application Scenarios】 - Measurement instruments that require high precision - Sensors that detect minute movements - Equipment that requires stable measurements over long periods 【Effects of Implementation】 - Improvement in measurement accuracy - Prolonged lifespan of equipment - Provision of stable measurement results

    Plastic bearings
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【For precision measuring instruments】Gemstones (Alumina bearings)

2021-09-30_09h45_40.png
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】 - Achieves high wear resistance and high dimensional accuracy - Widely adopted in fields such as watches, measuring instruments, and meters - Consistent processing from granulation to molding, firing, and completion for a variety of products in large quantities - Transparency that is nearly identical to synthetic ruby - Possibility of providing blanks with dimensions close to completion through near-net-shape molding 【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 customers with high-quality 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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Company information

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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