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Alan B. Pearce wrote:
> >That's just there to drain off static charge that builds up.
> >It's not carrying any current to speak of.
> Micropolis used to have them on their full height 5.25 inch hard discs. the
> trouble was the brush would get to a point where it would squeak or squeal.
> We had a recommendation from Micropolis to remove them, as they did not seem
> to serve a useful purpose in that case.
A drop of oil fixes the squeal and the brushes
last practically forever. I know they are designed
for use other than carrying current, but a few mA
would be well within their range. :o)
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