A balance clip in a hard disk drive spindle motor facilitates improved disk pack
balance correction. The balance clip has one end that is offset from the semi-circular
shape of the body of the balance clip. The offset end is located opposite the precise
bent tab that provides tooling engagement in the balance clip. The offset end of
the balance clip is offset at a radius that is less than the radius of the balance
clip, or at a pre-determined, lesser radial offset from the original circular shape.
Consequently, the cross-sectional edge of the clip at the offset end does not make
contact with the surface of the groove in which the balance clip is seated. This
design eliminates scratching between the offset end and motor hub, and thereby
greatly reduces friction and particle generation during clip adjustment in the
disk pack balancing process.
