A bearing seal for a rolling bearing with standard boundary dimensions that comprises a first flinger fitted into a first bearing ring and a second flinger fitted into a second bearing ring. Each flinger further comprises a correspondingly numbered sealing body. A first sealing body engages the second flinger and/or the second bearing ring, and a second sealing body engages the first flinger and/or the first bearing ring. The axial width of the bearing seal varies along the radial direction of the bearing. Starting at the first bearing ring, with a narrow width W, defined relative to the total radial size of the bearing seal L, wherein the ratio W/L is less than or equal to 0.5, the bearing seal widens toward the second bearing ring, thereby providing extra space between the rolling elements and/or cage and the bearing seal adjacent to the first bearing ring.

A sealing device including a U-shaped slinger to achieve reduction of torque and improvement of sealing ability is provided. A core member portion of the sealing device includes a seal lip portion which performs relative rotational motion while being in contact with the slinger and is made of an elastic material. The slinger includes a first cylindrical portion, a disk portion, and a second cylindrical portion, and has a recessed space as an outer frame which is defined by the first cylindrical portion, the disk portion, and the second cylindrical portion. At least two continuous faces of a first face of the disk portion and a second face of the disk portion are roughened, the first face facing the recessed space, the second face being adjacent to the first face are roughened.