| 摘要 |
In a spindle hub configured for rotation about an axis, through holes extend from a first end of the spindle hub to a second end of the spindle hub. The through holes are generally parallel to the axis. A method of achieving two-plane balance of a disc pack assembly by positioning one or more weights in one or more of the through holes and retaining the weight in the position, such that it is possible to access each weight from the top of the spindle hub.
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