🚀 go-pugleaf

dd@adobe.com (David DiGiacomo) wrote:

>In article <4p50qf$2u9@clarknet.clark.net>,
>Robert Blackshaw <blckshaw@clark.net> wrote:
>>cdewick@jedi.apana.org.au (Craig Dewick) wrote:
>>>I have three Micropolis 1558 ESDI drives which function perfectly except
>>>that the bearings are shot from old age. I believe at least two of the
>>>drives only need the bearings to be re-lubricated, while one is probably
>>>unrepairable.
>>
>>I can't remember what my 1558 looks like, but some of the older HDs
>>used to have a phosphor bronze spring strip that bore against the
>>main shaft. This was to "drain" static electricity I believe. Unfortunately
>>they also devloped a noise like a 747 at takeoff. I have seen people
>>lube the spring and I have seen them simply torn off, both solutions
>>seem to work.

>The 1558 has no external accessible hub brush.  I have heard different
>opinions about whether the noise is due to a hub brush or the bearings,
>but I don't know anyone who has actually opened a "screamer" to find out.

Funny, there was a post here earlier that claimed they do have this brush
and you don't have to open the drive as they are external to the drive
proper.

>>As another poster noted, if your bearings are really shot
>>you should have had a head crash by now.

>Why would worn bearings cause a head crash?

If they are shot to the point of making such noises the platters would
most liely wobble. The heads are supposed to "fly" on air but they
would be unlikely to cope with a wobble.

Bob


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