[dorkbotsea-blabber] where can I get a magnet?

[daniel joyce]

Magnetrons from old micrawaves have large ceramic ring magnets.

On Sun, Sep 21, 2008 at 11:51 AM,  <mike at clarkeconsulting.com> wrote:
> You'd also find a ring-shaped magnet in a brushless dc motor (or fan), if you have one of about that size that you are willing to rip apart.  Vetco in Bellevue also has a few bins of various magnets -- you might give them a call to see if they have one like what you need (or a motor/fan/speaker that would have it).
>
> -Mike
>
> -----Original Message-----
> From: Wim Lewis <wiml at hhhh.org>
>
> Date: Sun, 21 Sep 2008 10:52:54
> To: A discussion list for dorkbot-sea<dorkbotsea-blabber at dorkbot.org>
> Subject: Re: [dorkbotsea-blabber] where can I get a magnet?
>
>
>
> On Sep 21, 2008, at 10:15 AM, Heurihermilab wrote:
>> I'm looking for a ring-shaped magnet, should be at least two inches
>> in diameter.  I figure someone here might know a brick-and-mortar
>> location in this area that sells them, perhaps a science or hobby
>> supply store...
>
> Sounds like the kind of magnet you find on the back of a large
> speaker. Does it matter to you how the poles are arranged? Maybe you
> could find a cheap or damaged woofer somewhere and scavenge its
> magnet, assuming speaker design hasn't changed much since the last
> time I pulled one apart. (Sometimes the magnets are hard to remove
> from the speaker without breaking them, though.)
>
> Otherwise, maybe Science Art & More in Roosevelt?
>
>
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