Koyo delivers mega bearing for tunnel excavating machine

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.

http://www.bearing-news.com/delivers-77m-diameter-slewing-bearing-for-one-of-japans-largest-tunnel-excavation-shield-machines/

FAQ

Que sont les roulements à billes EXSEV de KOYO?

Les roulements EXSEV (EXtreme Special EnVironment) et céramique sont conçus pour des applications et des environnements spécifiques, où les roulements conventionnels ne suffisent pas. Ces roulements fonctionnent de manière optimale dans des environnements extrêmes comme les salles blanches, sous vide, à hautes températures, ou encore dans des milieux corrosifs et/ou contaminés. Ils sont d’ores et déjà utilisés dans une large gamme d’applications de pointes.

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