| 摘要 |
An information handling system, such as a disc drive, including a base, a disc stack rotatably attached to the base, and an actuator assembly movably attached to the base. The disc stack assembly includes a spindle hub rotatably coupled to the disc drive. The spindle hub has an axis of rotation about which the disc stack assembly rotates. The spindle hub includes a cylindrical portion. The disc stack assembly also includes a clamp, a disc spacer, and a disc coupled to a spindle hub. The disc spacer has an opening therein dimensioned to receive the cylindrical portion of the spindle hub. The disc spacer is asymmetrical and positioned to counter balance a mass offset in the disc stack assembly. The asymmetrical disc spacer also includes a registration surface. The registration surface is on the outer perimeter of the disc spacer. The disc spacer has a center of mass offset from the axial centerline of the opening. The disc spacer is used to counter the center of mass offset of the disc stack assembly. Typically, balancing the disc stack assembly requires that the center of mass of the spacer is on one side of the axis of rotation of the hub and the center of mass of the disc stack assembly is on the other side of the axis of rotation of the hub. The flat surface of the asymmetrical disc spacer is positioned so the plane of the flat surface intersects a plane defined by the axial centerline of the disc stack assembly and a point associated with the mass offset of the disc assembly.
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