Disk storage device with improved spindle torque and acceleration

DETAILED DESCRIPTION The foregoing and other objects are achieved by providing a disk storage device that utilizes an inner rotor spindle motor in which the spindle shaft is fixed to the disk mounting hub and rotates therewith.
Support for the spindle is provided by a bearing tube that has a greater diameter and greater rigidity than the stationary shaft or post typically employed to support the disk stack in an outer rotor arrangement.
The bearing tube supports the bearings in which the spindle shaft is journalled and allows wider axial spacing between the bearings, reducing spindle run out.
At the same time, the bearing tube functions to entrap contaminants from the bearings within the internal motor space and reduces contamination in the clean chamber.
Further, the motor elements are located outside the clean room chamber, further enhancing the cleanliness of the environment surrounding the data storage disks.
These and other objects, features and advantages of the invention are illustrated in the following description of preferred embodiments, as illustrated in the drawings as follows.