Reliable Bearings for the Industrial Motor Industry

Industrial Motors

Motors across industries depend on NSK bearings for smooth and quiet rotation under load.

Electrification of industrial machinery requires motors to use less energy and reduce loss while reliably operating for longer periods. NSK rises to this challenge with high-performance bearings that fully utilize our technologies and expertise in tribology.

NSK’s advancements in reducing energy losses and extending operational life reflect the indispensable role of motors and our commitment to the environment as we move to the future.

Operating conditions: constant torques plus changing speeds

Electric motors and generators place completely different demands on bearings compared to gears. Knocks and fluctuating torques rarely occur. Different speeds are usually the key consideration when it comes to selecting bearings.

Performance classes vary, however. Electric motors and generators in the consumer segment – such as drive motors for washing machines or car alternators – usually have to fit in a very small space and tend to operate under constant conditions. Motors and generators with a higher power density are normally used in industrial plants or to produce power, where considerable load variations are commonplace.

In electric motors and generators, the shaft bearing often has to be insulated from the housing to prevent damage caused by current conduction. With this in mind, NSK has developed electrically insulated bearings with a ceramic coating which are suitable for the conditions associated with these specific mechatronic applications.
NSK can supply the right bearings for all operating conditions and applications, such as extremely compact deep-groove ball bearings which deliver ultra-quiet running along with optimised low energy consumption and require no maintenance.

Electrically insulated bearings with a ceramic coating

Some applications are prone to causing bearing damage and premature failure due to electrical corrosion. Electrical corrosion is damage to the raceway resulting from electrical discharges between the rolling elements and the raceway. With its electrically insulated bearings, NSK offers a special product with high insulation resistance to deal with this problem. The bearings’ rings are coated with a layer of ceramic which has a set thickness. This is applied using a special spraying technique designed to ensure that the coating bonds securely to the bearing steel.

Our innovations:
The HR series of deep-groove ball bearings
Hybrid bearings with ceramic balls