Industrial applications in challenging environmental conditions call for special bearing solutions. Bearing manufacturer NKE Austria GmbH has developed hybrid bearings for precisely these applications.
NKE hybrid bearings consist of ultrapure steel bearing rings and ceramic rolling elements made of bearing grade silicon nitride Si3N4 . At first glance, this material pairing is highly unusual, but it offers many advantages in an enormous range of applications, which significantly increases the reliability of the overall system.
The ceramic rolling elements have high wear resistance and can achieve better results under extremely demanding conditions, such as poor lubrication, thereby extending service life significantly. The very good 'dry-running properties' of a hybrid bearing play an extremely critical part in substantially enhancing the reliability of an application.
Higher speed suitability: centrifugal force reduction due to the light rolling elements
Lightweight: Silicon nitride is 60% lighter than conventional rolling element steel
Extended service life: longer bearing life and longer re-lubrication intervals
Reduced friction: less frictional heat, especially at high speeds
High wear resistance
Higher rigidity: less deformation in rolling contact areas
Reduced risk of poor lubrication at high speeds and fast accelerations, or in the case of insufficient lubricating film
Low running noise operational bearings
Significantly less susceptible to standstill marks known as “false brinelling”
Reduced thermal expansion
More precise control of preload and bearing clearance
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