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Koyo is one of the main global bearing manufacturing companies that is actively involved in fighting counterfeit products
For more in depth information see related link to WBA: 

Recently we published a paper on the importance of the proper validation of bearings for the Automotive repair/maintenance application, in BearingNews. The main focus in that paper was on the "bearing design" validation. In the latest paper the focus is on the importance of proper "bearing manufacturing" validation.

 

    

This year’s HannoverMesse was visited by more than 215,000 visitors including ~40% international attendants joining this industrial fair with ~6500 global exhibitors. Among those exhibitors was JTEKT/Koyo with a booth in hall 22 displaying its latest bearing products and related technologies. As usual Koyo’s booth was well visited by industry experts, branch representatives, the press, students and other interested attendants. Among those visitors were several valued Koyo distributors, including Künemund, Kugellager Premium, Mondial, Ditzinger, Dono, PWO, Ubex, HL Group, Enso and others, that attended our cocktail drink on the Wednesday late afternoon to catch up with each other and exchange in a friendly spirit. During the fair our Partner Kugellager Premium invited us for joint visits to different OE customers. The open discussions were very fruitful and will reinforce our strategy to grow the aftermarket business through our distribution network.

This event again contributed successfully to the expansion and intensification of Koyo’s business activities in the roller bearing markets in “greater” Europe and beyond.

 

 

A Roller Bearing is really an extraordinary piece of mechanical engineering. The smallest types have a diameter of no more than a few millimeters and are used in dentist drilling devices with maximum rotation speeds of more than 30.000 rpm, while the largest ones are used in tunnel drilling equipment and measure more than 7 meters in diameter, while rotating at no more than a few rpm's per day.
 
Linked is an article about one of Koyo's mega bearings for such an application.

 

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.

For more information please click here “Products”

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