Hard disk material

Tony Duell ard at p850ug1.demon.co.uk
Tue Nov 25 13:29:36 CST 2008

> My thinking is that the drum could be recoated (this is assuming it is
> indeed shot), and using the rigid cast chassis, ground down to a
> smooth surface with a custom made tool. This is much like a "poor mans
> wheel lathe" used on railroad wheels. As long as the bearings are
> still pretty tight, there should be very little wobble between the

If there is signifcant play in the bearings, you have prolems anyway, 
since the drum won't remain at hthe right distance form the heads. You'd 
need to sort that out before re-coating it.

> drum and chassis. With each head being adjustable for height, much
> inaccuracy across the drum becomes fairly unimportant. Inaccuracy
> around the drum is more of an issue, but I suspect it will not be too
> bad if the correct tool material and magnetic coating is used, and the
> drum ground down gently. I will ask my real machinist friends about
> the tooling, as I doubt I (or any of us) could make it.

I wonder  if you coud remove the heads and mount something in place of 
each one temproraily holding a cutting or grinding tool. Then slowly feed 
it in with the drum spinng. It shouldn't matter if all trackes aren't 
exactlyy the same height, that's what the head adjustments are for :-). 
Afterwards, replace the heads and adjust.


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