Re: Hard Drive magnets.

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jason Johnson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <hvjjohnson13-at-hotmail-dot-com>


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, April 16, 2001 7:11 PM
Subject: Hard Drive magnets.


> Original poster: "Christopher Boden by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <chrisboden-at-hotmail-dot-com>
>
> >Original poster: "Jason Johnson by way of Terry Fritz
> ><twftesla-at-uswest-dot-net>" <hvjjohnson13-at-hotmail-dot-com>
>
> >I used were kidney shaped NIB (neodymium iron boron, I think) ones out of
> >an
> >old hard drive. They could lift 80 lbs of iron a piece.
>
> I wanna see this drive :) that's a SERIOUS magnet, I've gutted 300Lbs hard
> drives (out of a 3990IBM and also an IBM AS400 mainframe) and never seen a
> hard drive magnet that could lift 80lbs (though they WILL give you really
> nasty blood blisters). I want a couple of those magnets....the fun I could
> have :)

I didn't scrap the drive. I got these magnets from a guy on ebay who said
that they're from a hard drive. I beleive him because they are just like all
the hard drive magnets I got out of old drives, only bigger :-) I paid 9.00
for the pair. Just have a look on ebay, you'll find some big ones. They are
really fun too. Plasma experiments, wire bending, the slow falling magnet
trick etc. I'm going to experiment with magnetic quenching on my next medium
size coil (4" secondary). Should be done with that coil in a few days.

>
>
> SNIP
>
> LARGE (in size that is, not capacity, 5.25" high performance hard
> >drives under 100mb usually) hard drives there should be a pair in there.
> >
> >Jason Johnson
> >
>
> Before you go gutting out hard drives, look at the bottom. If there is a
> little stepepr motor in the corner, don't open it, there are no useable
> magnets inside (only a couple small ones in that stepper motor). You want
> what is referred to as a "Voice Coil Actuator" type hard drive.

Found that out too. Nice motors for little robots and whatnot.

Jason Johnson

>
> I've actually made working speakers form these. :) Really freaks out the
> guests, lol.
>
> Christopher A. Boden Geek#1
> President / C.E.O. / Alpha Geek
> The Geek Group
> www.thegeekgroup-dot-org
> Because the Geek shall inherit the Earth!
>