SKF INSOCOAT Bearings: Reliable Insulation Solutions to Protect Electric Motors and Generators from Electrical Erosion
Electric motors, generators and associated equipment are at risk when an electric current passes through their bearings. This can damage the contact surfaces of rolling elements and raceways in the bearings (electrical erosion) and rapidly degrade the grease. An additional risk in electric motors and generators comes from high frequency currents caused by the inherent stray capacitance. The risk of damage increases where the application uses a frequency converter.
INSOCOAT bearings are designed to prevent electric current from passing through the bearing. The external surfaces of either their inner or outer ring are coated with an insulating aluminium oxide layer, by applying a sophisticated plasma-spray process for an outstanding quality finish. The solutions are very cost-effective compared with other insulation methods.
The standard assortment of INSOCOAT bearings listed here constitutes the most commonly used sizes and variants of:
For bearing types and sizes not listed in the product tables (Deep groove ball bearings, Cylindrical roller bearings), contact SKF.
For applications where smaller bearings than those listed are needed, SKF recommends using SKF Hybrid bearings.
In addition to the standard assortment, SKF can supply special INSOCOAT bearings and bearing units with complex ring geometries, such as:
For availability and detailed information, contact SKF.
Here are examples of applications in which INSOCOAT bearings might be used:
