Low-torque ball bearing KOYO

Development of low-torque ball bearing that improves automotive fuel efficiency.

JTEKT Corporation has developed a low-torque ball bearing for use in oil lubrication that improves automotive fuel efficiency.

Many oil-lubrication ball bearings are used in the motor-support areas of hybrid vehicle transmissions and the gear-support areas of automotive automatic transmissions, manual transmissions, and continuously variable transmissions.

Further improvement in automotive fuel efficiency is currently sought, and further reduction of rotational resistance (rotational torque) in the ball bearings used in the above mechanisms is seen as essential. By optimizing the design dimensions of the bearing internal parts, JTEKT has succeeded in reducing rotational torque 40% in comparison with the conventional product.

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