A spindle motor is equipped with pre-installed adjustable balance clips on a
stainless
steel motor hub to facilitate better balance correction. A balance clip holder
feature is formed in the hub and has grooves to hold the balance clips. The balance
clip holder can be an integrally formed part of the hub, or it can be a separate
piece that is assembled to the hub before the complete motor is assembled. In addition,
the balance clips are provided with an improved coating to reduce friction during
adjustment of the clips in the balance process. Each clip has a coating of nickel-Teflon
to achieve a better coating quality and cleanliness over prior art designs. The
nickel-Teflon combination yields unexpected results, such as a significantly smoother
surface with more uniform coating thickness, and significantly less particle sloughing
to reduce contamination.