Pulling apart a desktop hard drive to get rare earth magnets.

In this instructable I will show you the steps to take apart a computer hard drive and get the rare earth magnets from it.

Step 1 What you'll need...

1. A hard drive
2. Appropriate screwdrivers

Pretty simple, eh?

Comments

[dthomas-1]

I was doing this today and found the perfect method for removing the magnet from the metal plate it is attached to, without doing any damage to the magnet. Simply use the claw end of a claw hammer. slide the metal bracket the magnet is attached to into the claw,( keeping clear of the actual magnet itself) then apply pressure to the opposite end of the metal plate to bend the plate backwards. This creates a large gap under the magnet (and breaks any adhesive used to attach it to the plate) then you just slide the magnet off the plate. Works like a charm and nobody gets hurt. :)

[or_ford98]

put dental floss under the magnet and pull whilst holding on to the unmagnetised metal with pliers of some sort... but you need three hands :'(

[jazzdferry]

I tried Dthomas's method of removing the magnet with a claw hammer-it worked like a charm-very quick.i also put one end , very carefully- in a tabletop vise-much easier for a female who isnt quite as strong.

[WardXmodem]

I do dozens of these.

Several things work.

if you have one magnet that is on a purely flat piece of metal, grip the metal in a vice, and use a pliers to bend the admittedly pretty heavy duty metal, away from the magnet, until you can slide something thin under one end of the magnet - a knife blade, razor blade, or bending far enough, screwdriver.

HOWEVER when you pry it off, I find maybe 20-30% of the time, the nickle plating comes off, leaving the raw magnet under that area.

NOW, if you have one side of the 2 magnets whose metal bracket has lots of bends (bent up sections) you may be able to drop it on a cement floor or sidewalk in such a way as the G force of stopping suddenly, pops the magnet off. This has worked several times for me.

THE REAL QUESTION IS: What SOLVENT, if any, will gently remove the magnets? It might work best (if there is one) to have bent the metal to expose more of the underside to the solvent.

I have MEK, Lacquer thinner, and could buy some "super glue remover", and try them - if anyone has some try it and post back.

Thanks!

[ajohnson54]

I like B12 Chemtool you can find it at most autoparts stores.

[szabecki]

Hi!
I realized the great magnets in old hard drives because I take them apart to sell the aluminum. The body of a hard drive is a solid block of aluminum. Not cast. The magnets are a great perk. After I remove anything not aluminum (which is not very much) I put it in a box with others then bring them to the scrap metal place. Usually get around .80 and up per lbs.

[Ace Winget]

Great work john! I've been looking for something just like this bravo! For the people that are still having a hard time opening or disassembling their hard drive here is an easy to follow image that you should check out. It helped me out too.

[mcarrell]

Agree. Was looking for instructions on how to remove the magnet from the housing / brace it's attached to. This is an unfinished instructable without that critical info because it completely mutes magnetivity on the flat side of the magnet and the side that is magnetic has 1/4 " standoffs that make it useless for many applications because they get in the way. It seems fiercely attached to this. What method do you (or did you?) use to remove this thing??

[idiotjohn]

Hi there,
As i remember, used a vice and some heavy duty pliers to be the plate that is connected to the magnet, this allowed me to use a screwdriver to pry the magnet from the plate.

John

[lservis kompter]

how to repair hard drive when it sound like "click,"

[Rayisawesome]

well i couldnt find any screw drivers that were the rite kind for my hard drive soooooooo i grabbed a hatchet and started hacking. Two cuts, 3 slashes in my carpet, and 45 minutes later i have my rare earth magnets!

[1spartan95]

Thats how we do it down south!

[ronmaggi]

Wouldn't an electro-magnet be able to push it off? I say electro-magnet because you may need to reverse the polarity. the idea is to put it behind the casing and turn on the electro-magnet, if the magnet doesn't pop off, reverse the polarity.

[kjbaran]

That would work if the magnet was attached with its own magnetism. However, it is securely stuck in place with a bonding material that ensures the magnet doesn't move during normal operations. :D

[snausage]

What do I do with the rest of the parts? How can I recycle those? Is there anything toxic in them? THX!

[a_guy]

Is it possible to run the motor in the hard drive using another power source?

[lmlisak]

I have been lucky with an X-ACTO knife. Some magnet brackets have 2 threaded holes that are right under each pole of the magnet. Then carefully using the drives machine screws and the xacto knife, I break the bond... eventually getting a slotted screwdriver blade under it. I only broke one... and from then on, I've gotten the "Feel" of it..

[Fat Bagel]

Im in Aus to hard rubbish is on now ive seen a few computers around but i dont want to hang around to long getting the hard drives out because they made it illegal to take stuff. but i might give it a shot. cool instructable

[milamber]

dude im in aus and it not realy illigal iv taken pcs xboxes and all kinds o stuff no one cares

[clics]

A better way to do this is to put the magnet with the casing in a vice and use a pair of pliers or vice grips to bend away the back casing. This will usually make the magnet come off the backing in one corner. You can then simply pull it off if you've got enough separation. If not, you can use a flat head screw driver to get under the magnet and gently pry it off.

[mel81]

can you find rare magnets from other electrical equipments such as an old printer or scanner?

[idiotjohn]

thats great that all of you have found this so useful

[Tailslvr7_7]

umm... One of my magnets aren't getting off.

[Tailslvr7_7]

nm I got them off

[sideways]

I've been doing this for years because the magnets are so strong. I even use them to hold a christmas wreath on my front window (they'll work thru glass). But watch it, they're strong enough that the force of two of them coming together might break whatever's in between them, like your finger or window. I put a piece of felt between mine and the window.

[looking4ideas]

This is off topic but why are these magnets called Rare Earth Magnets

[idiotjohn]

I don't think that is off topic... They are called rare earth magnets because they are made from rare earth alloys of rare earth elements which are: LinkyLinky

John

[topazeyes]

You said the stuff inside is bad for you. I didn't. know that. I've broken so many of them.

[jirtan]

I took apart over 20 hard drives at work over the course of two or three days, and I made sure to salvage the magnets. I now have a log of magnets and steel on my shelf.

[jare-bear]

this is a sweet instructable. now i just have to get my parents let me do it to one of our really old HDs lol

[SpaceBiscuit]

Forgot to add in my last POST: the platers make great cubical mirrors :-)

[SpaceBiscuit]

I work in IT we just replaced about 300 computers, me and a co-worker pulled all drives (for security reasons) and been doing this for the past month. NOTE: we have a lot of down time with nothing to do :-)

[frosty1433]

those magnets aren't rare

[idiotjohn]

they may not be rare (meaning not very many) but they are actually called Rare Earth Magnets - search google...

[frosty1433]

oh. lol

[uLTIMA]

i been doin this since my great great grand father was sucking on his moms teet, the best way to remove the magnets from the plate is to get 2 pairs of pliers and bend the plate, that breaks the glue and makes the magnet effortless to remove, due to the plate having a curve and the magnet just see-sawing on the plate

[daytribe]

Followed your directions and now I have a really strong magnet. There was only one in my drive though. I still need to work out how to get the silver magnet off the silver plate though.

[les_SD_3386]

LOL nice! Although many people would find this instructable pointless I must admit the 2 magnets in the HD are STRONG!!!!! and VERY useful, they make great file cabnet magnets and screw holders lol, thanks for the instructable.

[Deathcapt]

I get my Rare earth Magnets at Lee Valley Tools, They're like 1$ for 4

[chuckr44]

Great idea. I've done this several times and broke 2 torx bits trying to get the screws out. Now I spray the screws with penetrant, then tap with a hammer, then let them sit 24 hours before I do anything. No more broken bits. Also, many screws are hidden under stickers on drives. I don't remove the stickers, I just feel around for a depression. When I find one I just jam my screwdriver in there and unscrew the screw.