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View Full Version : What kind of magnet in BP21 motor?


Twizter68
01-17-2007, 02:47 AM
What are the magnets made of in a BP21 cdrom type motor, andhow are they comparedthe a rare earth agnet?

DIALED/CHUCK
01-20-2007, 03:26 PM
only 4 days and not a post....man this forum needs to hop it up! :D

--C

stinkweed007
01-20-2007, 03:54 PM
well... we might have a good answer if we flew computers....

I have no clue..

carlospq
02-06-2007, 08:09 PM
I think they are neodyme magnets.

This is my BM2408-21 (similar to BP21):

http://img362.imageshack.us/my.php?image=pc170083large6pa.jpg

GallopingGhost
02-06-2007, 10:54 PM
Geez all I know is they make pretty good power for a cheap motor. Look lie Neo's to me, maybe Cheapodyminium? :)

ScubaSteve
02-13-2007, 08:31 PM
Most magnets in rewound/cdrom-style motors nowadays are neodymium. Usually anywhere from N40-N50. I don't know of any rebuilds that use cobalt.

Ghost, where's Gimp? Haven't heard him lately.