Wälzlager - 2014-06-16
Roller bearings that can support heavy loads are used in gearboxes* used in large industrial machines such as wind power generators, mining and construction equipment, and steelmaking equipment. In recent years, wind power generators have increased in size in order to generate more power. Also, mining and construction equipment and steelmaking equipment are used in very harsh conditions. Therefore, bearings used in the large gearboxes used for such applications must be highly reliable.
In response to these needs, NSK has developed large sized roller bearings that provide a high level of reliability through a combination of special heat treatment technology and material developed by NSK.
NSK was able satisfy the demand for greater performance in roller bearings for large gearboxes by combining special heat treatment technology and material developed by NSK. In particular, NSK has been able to decrease early damage by white structure flaking that leads to seven times service life longer than conventional bearing.
*Gearbox: A device made of many gears that is located between the input and output shafts and that is used to change the input RPM to the desired output RPM.
The newly developed bearing is better than the conventional bearing as outlined below, for improved gearbox reliability in harsh usage environments.
|White Structure Flaking Life||7 times|
|Surface originated Flaking Life||3 times|
|Subsurface originated Flaking Life||Twice|
|Dimensional Change Rate||1/50th|