- JTEKT developed a deep-groove ball bearing capable of operating at 40,000 rpm for EV e-axles.
- The new bearing design helps reduce e-axle size and weight for improved EV efficiency and range.
JTEKT Corporation has announced the development of an ultra-high-speed rotating deep-groove ball bearing designed for electric vehicle e-axles. The company stated that mass production of the new product will begin in June. The newly developed bearing can support rotational speeds of up to 40,000 revolutions per minute, making it the highest-speed deep-groove ball bearing currently available for automotive drive motors. The advancement is expected to support the growing demand for compact and high-efficiency electric drivetrain systems in next-generation EV platforms.
The company explained that the new bearing technology contributes to the reduction of e-axle size and overall system weight, which can help improve electricity consumption efficiency and extend vehicle cruising range. To achieve this performance level, JTEKT optimized both the shape and material composition of the resin cage used inside the bearing assembly. The updated structure suppresses centrifugal force generated during ultra-high-speed rotation, helping maintain stability and durability under demanding operating conditions.
According to the company, deformation of the cage caused by centrifugal force has been reduced by nearly 70% compared with conventional bearing products. The newly adopted resin material also provides the rigidity required to withstand high-temperature environments generated during continuous high-speed operation. This prevents excessive wear and deformation even when the bearing rotates at speeds reaching 40,000 revolutions per minute, supporting long-term operational reliability for electric drive motors.
Key Technical Improvements in the New Bearing
The newly developed deep-groove ball bearing incorporates several engineering enhancements intended to improve performance in electric vehicle e-axle systems. These improvements focus on rotational stability, thermal resistance, durability, and compact drivetrain integration. The company also utilized its proprietary model-based development methodology to shorten the overall development cycle while ensuring product reliability during validation and testing processes.
| Technical Parameter | Improvement |
|---|---|
| Maximum Rotational Speed | 40,000 rpm capability |
| Cage Deformation Reduction | Approximately 70% lower than conventional products |
| Material Enhancement | High-rigidity resin for high-temperature environments |
| Development Method | Proprietary model-based development process |
The company noted that its proprietary model-based development approach played a major role in reducing the development timeline while maintaining high product reliability standards. The technology is expected to support automakers seeking higher motor speeds and more compact drivetrain packaging in future electric vehicles. Beyond automotive applications, the company also plans to expand sales of the bearing technology into a wider range of industrial and high-speed rotational applications in the future.
Frequently Asked Questions
What is special about JTEKT’s new deep-groove ball bearing for EVs?
JTEKT’s newly developed deep-groove ball bearing can operate at speeds up to 40,000 revolutions per minute for automotive drive motors. The bearing uses an optimized resin cage design and high-rigidity material to reduce deformation and improve durability under high-speed and high-temperature conditions. This enables smaller and lighter e-axle systems for electric vehicles, helping improve electricity efficiency and extend driving range. The company also utilized model-based development techniques to accelerate development while maintaining product reliability and performance standards.
How does the new bearing improve electric vehicle performance?
The new bearing technology helps reduce the size and weight of EV e-axle systems by enabling stable ultra-high-speed motor operation. Its optimized cage structure suppresses centrifugal force and minimizes deformation during rotation, which improves drivetrain efficiency and reliability. The lightweight and compact e-axle configuration can contribute to lower electricity consumption and longer cruising range for electric vehicles. In addition, the high-temperature-resistant resin material enhances durability during continuous high-speed operation, making the bearing suitable for advanced next-generation EV powertrain systems.
Top of Form
Bottom of Form
Click above to visit the official source.