Electrically insulated bearings prevent damage

In order to prevent damage of this kind, it is advisable to insulate the bearing seat in the housing or on the shaft. However, this entails additional design measures of the surrounding parts. A simple, economical approach in this case is to use electrically insulated rolling bearings from NKE. Since the key dimensions and performance data of the insulated bearings is identical with those of the corresponding uninsulated models, no changes to the overall design are required.

Electrically insulated bearings from NKE, designated with the suffix SQ77, are provided with an oxide ceramic insulation layer. An overview of the various design variants of the insulation layer is given in the table. Electrically insulated rolling bearings from NKE offer exactly the same outer dimensions and technical characteristics as the corresponding uninsulated types.

The most important advantages of these bearings are higher operating reliability, which is assured by optimal protection against electrical corrosion. Electrically insulated bearings are less expensive than, for example, applying insulation to housings or shafts. They are interchangeable with conventional bearings because they have the same key dimensions and technical characteristics. They also offer a reduced risk of damage and thus also longer operating life than conventional bearings when used in electrical machines. When electrically insulated bearings are handled properly, there is no risk of damage to the coating.

The main range of electrically insulated bearings consists of cylindrical roller bearings and deep groove ball bearings, but all other bearing types can also be electrically isolated. Application areas include traction motors of railway vehicles, electric motors and generators, particularly in conjunction with fast-switching frequency converters.

Linqing Nine Star Bearing Science & Technology Co., Ltd 

( Insulated bearing, Hybrid ceramic bearing and  Brass cage DGBB)

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