Patent ID: 7307414

Claim:
A bearing with integrated rotation sensor, which comprises: a rotating ring; a magnetic encoder mounted on the rotating ring and including a ring-shaped rotational speed to-be-detected member for use in detection of a rotational speed, which has a peripheral surface formed with a plurality of magnetic poles alternating relative to each other in a direction circumferentially thereof, and an origin position to-be-detected element for use in detection of an origin position axially juxtaposed to a portion of a circumferential direction of the rotational speed to-be-detected member; a stationary ring; and a rotational speed magnetic sensor for use in detection of the rotational speed and an origin position magnetic sensor for use in detection of the origin position, both mounted on the stationary ring and arranged so as to confront radially the rotational speed and origin position to-be-detected elements, respectively; wherein the magnetic encoder further includes a magnetized restoration element for use in restoration disposed in a axial portion thereof confronting the origin position magnetic sensor, and in an entire circumferential portion except the origin position to-be-detected element, for rendering the origin position magnetic sensor to be held in a non-detection level.