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Re: Source for NIB magnets
---------- Forwarded message ----------
Date: Wed, 1 Oct 1997 17:26:45 +0000
From: BertPool <Bert.Pool-at-flash-dot-net>
Reply-To: bertpool-at-flash-dot-net
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Source for NIB magnets
> Date: Wed, 1 Oct 1997 14:03:24 -0600 (MDT)
> To: tesla-at-pupman-dot-com
> Subject: Source for NIB magnets
> From: Tesla List <tesla-at-pupman-dot-com>
>
>
> ---------- Forwarded message ----------
> Date: Wed, 1 Oct 97 15:36:00 EDT
> From: Gary Lau 01-Oct-1997 1508 <lau-at-hdecad.ENET.dec-dot-com>
> To: tesla-at-pupman-dot-com
<SNIP>
>
> A cheap/free source of these magnets is from junked brick-sized hard disk
> drives. The magnets are used to move the head assembly across the
> surface of the disk. The bigger the drive, the bigger the magnet, though
> I'm not familiar with the older drawer-sized jobs, these might be
> pre-NIB-technology. The pole pieces must do a remarkably efficient job
> at containing the field so as not to corrupt the disk data. Just be very
> careful when trying to remove the magnets from the pole pieces. They are
> glued with some very tough glue. ANY attempt at whacking them off or
> even gripping them in a vice will instantly shatter the magnets, they're
> brittle like ceramic. Better to try to slowly bend the pole pieces in a
> vice or arbor press so they peel away from the magnets. Then, keep your
> fingers out from between them!
>
> Gary Lau
> Waltham, MA
>
>
>
You may also carefully use a hot-air gun and heat the magnet/pole
piece assembly until the glue just softens. If done carefully, you
will keep the magnets below their Curie point and they will suffer no
heat related damage.
Bert Pool
TCBFW
bertpool-at-flash-dot-net