WikiPedalia is not endorsed or affiliated with the Wikimedia Foundation.
Labyrinth Seal
From WikiPedalia
A bearing seal that adds no friction, because there is no seal contact between the revolving part and the stationary part. Contaminants can't easily enter the bearing because the baffles of the labyrinth seal deprive them of a straight route inward.
Labyrinth seals work very well as long as the bearing assembly is not immersed.
The illustration shows a standard hub, but similar seals are used on some
other bearing applications as well.
