Design considerations for SKF INSOCOAT bearings

SKF 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.

Design considerations

when desining, you should consider abutment dimensions. To maximize the effectiveness of the insulation, SKF recommends the following guidelines for dimensioning the shaft and housing shoulders:

SKF bearings with a coated outer ring (designation suffix VL0241 or VL0246): housing abutment diameter ≥ Da min

SKF INSOCOAT bearings with a coated inner ring (designation suffix VL2071 or VL2076): shaft abutment diameter ≤ da max


During mounting, INSOCOAT bearings should be handled in the same way as standard bearings.

When using an induction heater for bearings with a coated inner ring (designation suffix VL2071 or VL2076), use a protective sleeve or an additional plastic support block.

In cases where springs are used to apply preload to deep groove ball bearings or lock nuts are used for axial clamping, SKF recommends inserting a steel spacer ring between the bearing and the preload or locking device.

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