Seiko (NSK) has developed a noise to the original 1 / 3 of the needle bearing. Mainly used for EV (electric vehicle) and HEV (hybrid) and the motor can make the car quiet when driving a car Denso parts. 2015 annual sales target is 200 million yen.

    Denso automotive parts such as the use of needle roller bearings in order to avoid stress concentration end, most of the processing end to crown made of circular shape to withstand high loads. Prior to processing methods, making the process raised some roundness inferior to the central part of the roller. Therefore, the inclination of the larger roller to scroll bearing protruding part of the noise becomes large.

    Through the development of new products, high-precision processing methods, so that raised some roundness to the original 1 / 4. In this way, put the bearing noise level occurred (pressure ratio) down to 1 / 3 less.