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

Cos’è un cuscinetto a rulli conici?

Un cuscinetto a rulli conici contiene al suo interno rulli a sezione tronco-conica, inseriti tra la coppa (anello esterno) ed il cono (anello interno), guidati lungo il bordino posteriore della pista interna.

Essi hanno elevata capacità radiale ed assiale per applicazioni a velocità intermedia. Sono disponibili a singola, doppia e quadrupla fila. I cuscinetti a singola fila hanno una capacità assiale normalmente pari al 60% di quella radiale. Quelli a doppia fila hanno una maggiore capacità radiale e possono sopportare carichi assiali in entrambi i versi: le generatrici delle linee di contatto dei rulli con le piste possono convergere sull’asse di rotazione (montaggio delle file a O, altrimenti detto indiretto) – nel qual caso aumenta la rigidità del supporto dell’albero – oppure divergere (montaggio delle file a X, altrimenti detto diretto). I cuscinetti a doppia fila possono venire forniti con anello esterno doppio e due anelli interni singoli (montaggio a O), oppure alternativamente con anello interno doppio e due anelli esterni singoli (montaggio a X). I cuscinetti a rulli conici a 4 file si ottengono alternando file di rulli con generatrici convergenti e divergenti

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