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Koyo & Koyo-Torrington Needle Roller Bearings brand integration

Following the acquisition of the Needle Roller Bearing Division in 2010, JTEKT has announced full brand integration starting on 1 January 2013. Needle Roller Bearings, branded Koyo-Torrington until the end of 2012, will now bear the Koyo logo exclusively, thus adding to the very complete range of Koyo ball and roller bearings.

 

The decision is justified by the advances in the integration of the ball, roller and needle bearing businesses under the umbrella of JTEKT. Therefore, starting on 1 January 2013, for all your bearing needs, there is only one name you need to know: Koyo.

 

Bearing 3D
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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