Disc slip preventing spacer ring apparatus and method of use

Abstract

An information handling system, such as a disc drive, includes 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 includes a cylindrical portion as well as a flange on one end of the spindle hub. At least one disc and a disc spacer are clamped to the spindle hub. The disc spacer includes at least one disc contact surface. In some instances the disc spacer may have two disc contact surfaces. In the disc contact surface also has channel or groove therein. The channel or groove is annular and continuous so that no localized stress or a minimum amount of localized stress will be produced. The channel or groove is dimensioned so that a specific coefficient of friction is produced between the disc spacer ring and the surface of the disc. The disc contact surface may have more than one channel or groove therein. Assembling the disc stack includes placing the at least one disc moveably about the spindle hub and placing the disc spacer ring moveably about the spindle hub. The disc contact surface of the disc spacer ring which has the groove or channel therein is positioned so that it contacts the surface of the disc. The disc and disc spacer are then clamped to the spindle hub with a force sufficient to cause the surface of the disc to protrude into the groove of the disc spacer ring.