Oil slinger for a turbocharger

Oil slinger for incorporation in a system for sealing the passage o f a rotating shaft (3) through an opening. The oil control device comprises an annular member (10) for rotation with said shaft (3) and provided with a circumferentially spaced array of passages (24,18) for centrifugally displacing fluid away from said shaft (3) as it rotates. The passages (24,18) comprise channels which are open along their length.