Patent ID: 8976487
Filing Date: 2015-03-10
Classification: G11B

Abstract:
1. A rotating device comprising: a hub on which a magnetic recording disk is to be mounted; a base configured to rotatably support the hub via a bearing; a shaft configured such that the shaft extends along a rotational axis of the hub; and a chassis arranged so as to face the magnetic recording disk, and configured to have a Young's modulus that is smaller than that of the base, wherein a base hole is provided to a face of the chassis that faces the magnetic recording disk such that the base hole extends along the rotational axis of the hub, wherein the base is fixedly mounted on the chassis by being fitted into the base hole, wherein the base is configured to have a circular protrusion portion configured such that the circular protrusion portion protrudes so as to surround the rotational axis of the hub, and wherein the rotating device further comprises: