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Koyo rebranding to JTEKT

To whom it may concern.

February 2022

We would like to inform you that JTEKT Corporation will be unifying all its business brands to the JTEKT brand. For the Bearing business this means that the Koyo brand will be replaced by the JTEKT brand, as of our next fiscal year, starting on April 1, 2022.

JTEKT expects to generate synergies of technologies through Brand unification, to facilitate and proceed with cross sales activities and to create synergies between groups.

This brand unification is made in order to remove barriers between business units, to grant a sustainable growth beyond the next 100 years and to provide more efficient and customer oriented services.

Our customers can rely on the continued good service and quality of our products in the future and our commitment to keep the same excellent business relationship with our valued partners, as in the past.

The official corporate announcement can be found on our corporate website:

https://www.jtekt.co.jp/e/news/2022/220119.html

FAQ

What is an angular contact ball bearing?

An angular contact ball bearing uses axially asymmetric races. An axial load passes in a straight line through the bearing, whereas a radial load takes an oblique path that tends to want to separate the races axially. So the angle of contact on the inner race is the same as that on the outer race. Angular contact bearings better support "combined loads" (loading in both the radial and axial directions) and the contact angle of the bearing should be matched to the relative proportions of each. The larger the contact angle (typically in the range 10 to 45 degrees), the higher the axial load supported, but the lower the radial load. In high speed applications, such as turbines, jet engines, and dentistry equipment, the centrifugal forces generated by the balls changes the contact angle at the inner and outer race. Ceramics such as silicon nitride are now regularly used in such applications due to their low density (40% of steel). These materials significantly reduce centrifugal force and function well in high temperature environments. They also tend to wear in a similar way to bearing steel—rather than cracking or shattering like glass or porcelain.

Most bicycles use angular-contact bearings in the headsets because the forces on these bearings are in both the radial and axial direction.

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