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Got a magnet strength question...

Started by AgentNitz, November 13, 2005, 09:21:33 PM

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AgentNitz

November 13, 2005, 09:21:33 PM
I was reading the 1 dollar tankbag do-it-yourself bit, and I got to wondering... Just how strong are the magnets in a hard drive compared to the ones used by cortech, oxford, joe rocket, icon, etc etc? Could I buy a stronger bag for say... 20$ or so, some stronger magnets for 10-15, and have a nicely sized bag for 30? If anyone knows about magnetic strength, and can explain it in idiot layman's terms, I'd be greatly appreciative =)
Aaaaah, Los Angeles. Where if the traffic don't kill ya, the air will =P

GeeP

#1
November 13, 2005, 09:27:24 PM
The magnets out of 3.5" disc drives are very strong.  I have a feeling the steel backer plate helps to direct the flux, but I've never really bothered to experiment.

I do know that on a flat 18ga. steel surface under bearing load, a 3.5" disc drive magnet provides about 50 lbs of pull.  I put handles on them and use them around the shop for moving sections of sheetmetal.
Every zero you add to the tolerance adds a zero to the price.

If the product "fails" will the product liability insurance pay for the "failure" until it turns 18?

Red '96
Black MK2 SV

Onlypastrana199

#2
November 13, 2005, 09:38:41 PM
One of the strongest i've ever played with was out an old school microwave i massacred....it pulled the paint off my fridge though  :o
'93 cf two bros can, alsa cobalt blue custom paint, fenderectomy, repositioned directionals, 15t sprocket, ignition advancer, SM2's, national cycle f-16 dark sport, cbr rearsets - fully rebuilt after a crash

The Buddha

#3
November 14, 2005, 11:26:32 AM
Quote from: GeePThe magnets out of 3.5" disc drives are very strong.  I have a feeling the steel backer plate helps to direct the flux, but I've never really bothered to experiment.

I do know that on a flat 18ga. steel surface under bearing load, a 3.5" disc drive magnet provides about 50 lbs of pull.  I put handles on them and use them around the shop for moving sections of sheetmetal.

The back plate isn't doing much at all except hold it on and they bolt it to the fixture. The magnets are horrendously strong ...between 2 of them if you get a little skin caught ... yea you'll howl in pain ... Tiny magnets and insanely strong.
Cool.
Srinath.
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natedawg120

#4
November 14, 2005, 04:25:25 PM
yeah i had some out of an old HD with 5.5 inch platters.  You could take the magnets and if you got on within 5 inches of the other they would snap to life.  Pinched my hand many times playing with them.  Out of a normal 3.5 inch they are really strong as well.  The $1 tank bag you could make with laptop hard drive magnets.
Bikeless in RVA

starwalt

#5
November 15, 2005, 07:15:26 AM
They are all wussy compared to these magnets. Can you believe I get paid to work on these things. What a great planet!  :lol:

Of course the only proble with them is that your GS gets stuck to it rather than the other way around.
-=Doug......   IT ≠ IQ.

God save us from LED turn signal mods!

Get an Ebay GS value  HERE.

1990 GS running, 1990 GS work-in-progress, 1990 basket case.
The trend here is entropy
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