Numerous delivery achievements: Bearings that do not require oil or grease lubrication.
Adopted in the Tokyo 2020 Paralympics: No need for lubrication due to the absence of a retaining device. All issues related to oil and grease have been resolved through the structure.
ADB bearings offer the following advantages due to their structure without retainers. ■ Advantage 1: Reduces maintenance burden with oil-free operation By minimizing sliding friction, oil and grease become unnecessary. This enables operation without relying on lubrication, leading to longer maintenance intervals and reduced maintenance and operational costs. ■ Advantage 2: Achieves overwhelming low friction by suppressing sliding friction Depending on the application and conditions, friction can be reduced by up to 1/14. ■ Advantage 3: Contributes to longer lifespan It eliminates common issues that can occur in bearings, such as deformation, wear, and damage of retainers, as well as problems caused by wear particles, thereby contributing to a longer lifespan. ■ Advantage 4: Capable of operating in harsh environments Since it can be used without oil, it performs well in conditions where the use of lubricants is difficult, such as high temperatures, underwater, in vacuum or zero gravity, and in environments requiring chemical resistance. ■ Advantage 5: Achieves stable rotation It can accommodate more balls internally than conventional bearings, distributing the load per ball and demonstrating higher load-bearing performance. ▼ For more details (Handling company: Coo Space Co., Ltd. official website) https://coo-space.com/
basic information
<Mechanism and Structure of ADB> The mechanism of ADB ("Autonomous Distributed Rolling Bearing") is very simple. There are small "indentations" where the balls of the outer ring make contact. In a conventional bearing, the balls roll directly beneath the axis, but in ADB, the indentations on the outer ring cause the balls to roll slightly off to the side from the vertical position. As a result, even when the balls make a complete rotation, the distance they travel is reduced. This causes the balls to slightly decelerate when passing through the indentations and then accelerate again after passing through. Furthermore, behind the accelerated balls, the following balls are still decelerating, creating small gaps between the balls. ADB utilizes this principle to naturally separate the balls from each other without the use of a retainer.
Price information
- Tokyo 2020 Paralympics: Adopted for the wheelchair of the Japan national wheelchair rugby team (won bronze medal) - Paris 2024 Paralympics: Adopted for the wheelchair of the Japan national wheelchair rugby team (won gold medal) (Scheduled to be adopted for the Los Angeles 2028 Paralympics as well) - Recorded 1.68 million views and 1,380 comments on YouTube (as of October 2026) - Kawasaki Entrepreneur Audition: Won the Entrepreneur Award - Invention Award: Won the Encouragement Award for Inventions - Nikkei Monozukuri: Featured in an 8-page special article - Various patents obtained
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Model number/Brand name
Self-regulating decentralized rolling bearing
Applications/Examples of results
<Aerospace Field> ■Delivery Record: JAXA ADB has been adopted for equipment used in harsh environments, such as attitude control for artificial satellites requiring long life, thrust vector control for rockets requiring vibration resistance, and rotors for Mars drones requiring high-speed rotation. <Marine Research Field> ■Delivery Record: JAMSTEC ADB has been adopted for equipment used in seawater environments, leveraging its characteristic of being able to use seawater directly as a lubricating medium. <Machine Tools, Robotics, and Canning Field> ■Delivery Record: OSG, DMG Mori Seiki Thanks to ADB's ability to rotate with low torque, it has contributed to increasing speeds to 30,000 rpm, approximately 2.5 times faster than conventional methods. It is also utilized for improving the efficiency of robotic movements and reducing takt time. <Energy Field> ■Delivery Record: Railway Technical Research Institute, Wind Power Generation Related Companies ADB has been adopted as a touchdown bearing used in the event of magnetic bearing failure. <Automotive and Engine Field> ■Delivery Record: Toyota Motor Corporation, among others A design report for ADB capable of high-speed rotation conditions of 180,000 rpm with a shaft diameter of 33 mm was delivered for turbochargers, which are particularly exposed to harsh environments among automotive parts.
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