> These mechanical components exhibit wear proportional to their use Actually the spindle isn't touching anything any more, because the spindle/rotor (one part

> These mechanical components exhibit wear proportional to their use Actually the spindle isn't touching anything any more, because the spindle/rotor (one part) is supported by a fluid bearing; it basically floats on a thin layer of oil. If the spindle touches the bearing at, essentially any speed that isn't zero, the bearing surfaces are damaged instantly and the resulting burrs and debris will degrade and lock up the bearing very quickly. I believe the only rolling-element/contact bearing used in modern disks is the pivot bearing of the arm assembly.