What's that gizmo?

[ftit@yahara.engin.umich.edu (Sergej Roytman)]

Here's a question for those of you who still remember the Disk ][.  My
drive's spindle rubs against the bottom of the case and the disk can't
spin up to the right speed.  I suspect that there's some sort of collar
missing on top of the spindle that's supposed to keep it at the right
height, but I haven't found any worn pieces inside my drive.  The
spindle does have more than 1/8" of play, however, so it seems as if
there should be something in there.

ASCII graphics:
                  ______
hypothesized _\  /______\   <-- hub for disk
   collar     /    |  |     <-- sleeve in which spindle spins
  location         |__|
                  __||__    <-- spindle sticking out
                 [______]   <-- disc which takes driving belt
                ----------  <-- case bottom

Does anyone know what the real deal is and what can be done to fix it?

Thanks in advance for any suggestions.

--
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|  ftit@engin.umich.edu   |   "... a stainless steel rat in the       |
|    (Sergej Roytman)     |  ferroconcrete wainscoting of Internet"   |
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