- Please contact the following phone number if you have any question forCeramics, bearings
- Miyota Works +81-267-31-1133 Open hours: 8:30-17:30 (Except weekends and holidays)
- If you have any problems for Ceramics, bearings to solve, please feel free to contact to us.
You can also request a document from inquiries. - By inquiry form
We handle a wide range of ceramic products and
offer high-precision ceramic components
based on our expertise as a bearing manufacturer.
Dimensional accuracy down to ±0.5μm is available※
Light weight with high wear resistance when compared to metals
Specifications suitable for different usages
※Depending on the product and the price
Designated processing is available for designated surface roughness and clearance can be specified for processing. We also pride ourselves in excellent dimensional accuracy.
CITIZEN FINEDEVICE runs integrated production from raw material composition, granulating, molding, firing complete through processing. Besides granulation technology and near net shape, we use press powder molding, or CIP molding technology, in addition precision process finishing, we manufacture ceramics and bearings with dimensional accuracy to the sub-micron level which are not available elsewhere in the market. Hole dimensional accuracy for the bearings is available down to ±0.5μm. Available Surface roughness and dimension accuracy are at high standard of Ra 0.03μm and below.
Excellent durability, wear resistance and hostile-environment resistance
The images below show the results of a 10-minute abrasion test comparing the end faces of a metal bearing (left) and a ceramic bearing (right). The metal bearing exhibits significant wear, deformation, and the presence of abrasion powder, while the ceramic bearing shows virtually no wear or deformation.
This demonstrates that ceramic bearings offer outstanding wear resistance, durability, and resistance to harsh environments, maintaining high performance even under demanding conditions.
Materials
We primarily use alumina and zirconia ceramics, carefully selecting the optimal material to meet your specific application requirements. Leveraging our extensive knowledge and experience, we ensure high dimensional accuracy, strength, and overall quality to satisfy even the most stringent customer specifications.
As a result, we are able to provide high-performance ceramic components suitable for a wide range of environments and applications.
In addition, we offer a variety of color options depending on the material. Alumina is available in red and white, and can also be provided in blue upon request.
Zirconia is available in white, black, and gray.
We can propose the most suitable color to match your application or design needs.
 |
 |
Shaping the Future with Microfabrication and Precision Technology
Product Features
We boast exceptional expertise in processing hard materials. In particular, we excel at high-precision machining of extremely small components, achieving the level of accuracy required in watch manufacturing. By maximizing the unique properties of ceramics, we provide high-quality parts not only for the watch industry but also for a wide range of industrial fields. We flexibly respond to the recent demands for miniaturization and thinness, continually meeting our customers’ advanced requirements with our microfabrication technology.
In recent years, our technical capabilities have also been utilized for replacing metal parts, and our ceramic components have been adopted in applications such as cooling fans for notebook computers and pump parts for water-cooling systems in data centers. We have a proven track record with shafts, bearings, washers, and more, and can handle everything from prototyping to mass production of similar shapes and sizes according to customer designs.
Please consider our CITIZEN FINEDEVICE ceramics with high processing precision for the replacement of metallic components.
- Please contact the following phone number if you have any question forCeramics, bearings
- Miyota Works +81-267-31-1133 Open hours: 8:30-17:30 (Except weekends and holidays)
- If you have any problems for Ceramics, bearings to solve, please feel free to contact to us.
You can also request a document from inquiries. - By inquiry form
Ceramics, bearings Case Study
Company name: Confidential / Industry: Bearing
Problem for Ceramics, bearings
The customer had problems that the metal bearing caused metal drop-out due to “poor inner dimension accuracy, roundness accuracy, surface roughness, etc…”, in addition, it caused rotation failure due to high viscosity of lubricant. Moreover, the bearings were also easy to deform by shock and caused noise. The customer wanted to solve these problems. The customer also wanted to try ceramics; however, there were no vendors immediately available.
About products or solutions
We proposed a drawing to the customer after discussing the design of the bearing made of ceramic material (this accuracy is not available for metals). We discussed about the design with the customer’s engineers and completed the final design which was approved by the customer. For those portions where we could not immediately make a decision for the dimensions, we made multiple kinds prototypes to evaluate.
Manufacturing prototype – Delivery process – Customer feedback
We expedited production of multiple kinds of samples and delivered them to the customer. At the same time, we simulated the manufacturing line subject to the mass production and proposed an estimation for the mass production to the customer. The customer started evaluation immediately, and after the products passed the initial evaluation, we started several thousand hours of endurance tests. During the endurance test, we communicated often and discussed the future by considering issues and measures which need to be taken care of at the time of mass production and also considering issues about the new bearings. Subsequently, the products passed the endurance test, we decided upon the best dimension from the test, proposed the final drawing, and gained approval by the customer.
Pricing
Generally, ceramic components are more expensive than metal ones.
However, due to their excellent durability, they are highly valued overall.
Delivery
Delivery times vary depending on the product, but we basically accommodate your requested delivery schedule.
Customer feedback
We were able to improve performance drastically, which will be well-received by the market. The bearing price met our expectations. However, since we would like to increase the number of the products in the future, so please collaborate with us on the pricing and let’s establish a good Win-Win relationship.
CITIZEN FINEDEVICE’s ceramic products are available with flexible response according to each customer.
Please contact us once.
- Please contact the following phone number if you have any question forCeramics, bearings
- Miyota Works +81-267-31-1133 Open hours: 8:30-17:30 (Except weekends and holidays)
- If you have any problems for Ceramics, bearings to solve, please feel free to contact to us.
You can also request a document from inquiries. - By inquiry form
FAQ about Ceramics, bearings
Characteristics comparison for ceramics (hardness, wear resistance, etc…)
| Material name | Sialon | Zilconia | Alumina | Silicon nitride |
High-carbon chrome bearing steel (SUJ2) |
Stainless steel |
| Specific gravity | 3.2 | 6.0 | 3.9 | 3.2 | 7.8 | 7.75 |
| Vickers hardness value (Hv) | 1600 | 1300 | 1700 | 1500 | 700 | 410～570 |
| Vickers hardness value (Hv) | 6.0 | 5.8 | 3.0 | 6.0 | 15 | 20～30 |
| Thermal expansion coefficient | 3 | 10 | 8 | 3 | 10 | 10 |
What kind of materials do you deal with?
Alumina , Zilconia
What kind of methods do you use for molding?
Powder press / Extrusion / CIP
What kind of production processes do you have?
Can you manufacture porous ceramics?
Possible.
What kind of equipment do you have?
Surface grinder, rotary grinder, wire saw, double-sided polishing device, single-side polishing device, centerless processor, wet grinding mill, spray dryer, electric furnace (air and vacuum), servo press machine, barrel machine, inner diameter process machine
What is the best hole dimensional accuracy?
Hole dimensional accuracy down to ±0.5μm is available.
Please explain about your capability for roughness and dimension accuracy.
Ra 0.03μm or below. (Alumina , Zilconia , Sialon)
How precise can you make the hole diameter?
The hole diameter accuracy is available down to ±0.5µm.
How big is the inner diameter?
We can handle from 0.1mm to 8mm.
What is kind of advantages over metal?
Please check the characteristic list above.
Can you form groove inside of the hole?
Possible. Please contact us for details.
For Chinese customers
As for as Chinese customers’ inquiries, please contact to our Taiwan office.
CFD TAIWAN LIAISON OFFICE
9F.-7, No. 483, Zhongshan 2nd Rd., Lingya Dist., Kaohsiung City 802, Taiwan (R.O.C.)
TEL 886-7-537-9502
886-7-537-9503
FAX 886-7-537-9880
Johnny Chiang (江志超)
johnnytt@ms39.hinet.net
Jon Chiang （江柏昇）
Jon@cfdco.tw
Please consider our CITIZEN FINEDEVICE ceramics with high processing precision for the replacement of metallic components.
- Please contact the following phone number if you have any question forCeramics, bearings
- Miyota Works +81-267-31-1133 Open hours: 8:30-17:30 (Except weekends and holidays)
- If you have any problems for Ceramics, bearings to solve, please feel free to contact to us.
You can also request a document from inquiries. - By inquiry form