Single row deep groove ball bearings for brush motors

Bearings used in Universal Motors need to meet high running speeds and provide good protection against ingress of brush dust contamination.

Universal motors driving washing machines are fitted with metal shielded deep groove ball bearings. The internal radial clearance is optimised to meet the requirements of high speed and low noise. Bearings are typically charged with grease combining high speed lubrication capability and low noise properties.

The design requirements on wet and dry vacuum cleaners are for deep groove ball bearings that can provide protection against ingress of brush dust contamination and humidity. Where brush dust is the contaminant bearings are fitted with metal shields incorporating a special labyrinth design. In conditions where humidity is a problem, heavy contacting rubber seals are the preferred solution.

In those designs where higher speeds are required the internal radial clearance is optimised and grease selected that can cope with the operating conditions.

SKF application engineers can offer bearing arrangements to meet the design requirements.
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