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Article #6415

Re: fixing screaming bearings on Micropolis 1558 ESDI drives

#6415
From: David DiGiacomo
Date: Thu, 06 Jun 1996 00:00
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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.

>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?
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From: dd@adobe.com (David DiGiacomo)
Subject: Re: fixing screaming bearings on Micropolis 1558 ESDI drives
Date: 1996/06/06
Message-ID: <4p7e98$5sl@enquirer.mv.us.adobe.com>
X-Deja-AN: 158850979
references: <4ovmkp$1dg@jedi.apana.org.au> <4p50qf$2u9@clarknet.clark.net>
organization: Adobe Systems Incorporated
newsgroups: aus.computers.sun,comp.sys.sun.hardware,alt.sys.sun
originator: dd@slack