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Magnets flying great distances and colliding... with a finger!

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Hon1nbo

Sat Feb 21 2009, 04:21AM

Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: North Texas
Posts: 1040

found this posted online... though you guys might want to see it
the person in question ordered some peculiarly large magnets, and had them fly about twenty inches and smash his finger... here is the link:
HERE

rp181

Sat Feb 21 2009, 04:27AM

Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529

OMG! 404 error =p

aonomus

Sat Feb 21 2009, 04:56AM

Registered Member #1497 Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801

Warning: the link contains graphic images and should be viewed with caution!

Actual link:

Essentially, a large 75mm diam, 70mm long cylinder, and a 50mmx50mmx100mm brick (both N45) had their poles aligned from 50cm (20") away, and his finger got caught. The finger bone was smashed, and his fingernail was removed, intact. His hand required surgery and its a bloody (no pun intended) mess.

Shaun

Sat Feb 21 2009, 09:22PM

Registered Member #690 Joined: Tue May 08 2007, 03:47AM
Location: New Jersey, USA
Posts: 616

I have a large 2"dia 1"thick N50 disk and I always thought it was capable of something like this... that's why I keep the smaller 1" ones stored separately and never take them all out at the same time.

And those pics are really f***ing gross

Hazmatt_(The Underdog)

Sat Feb 21 2009, 09:57PM

Registered Member #135 Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735

OWWWWWWW!!!!

I guess that means that magnets like this will require a waiver before purchase and maybe even a data sheet that details critical distances for the magnets, eg. safe distance and hazard distance.

Hon1nbo

Sat Feb 21 2009, 11:52PM

Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: North Texas
Posts: 1040

Hazmatt_(The Underdog) wrote ...

OWWWWWWW!!!!

I guess that means that magnets like this will require a waiver before purchase and maybe even a data sheet that details critical distances for the magnets, eg. safe distance and hazard distance.

the company I plan to get one from for a project requires that someone at least 21 years old, with ID, has to sign for it, and that it be shipped via ground, etc...
I took another look at their site, and they added a story about someone losing an entire hand from these types of magnets... strong stuff...

Backyard Skunkworks

Sun Feb 22 2009, 07:09AM

Registered Member #1262 Joined: Fri Jan 25 2008, 05:22AM
Location: Maryland, USA
Posts: 451

DaJJHman wrote ...

Yeah, I had heard about that story from unitednuclear. Yet another freak accident with super strong magnets...

I've never handled any magnets nearly that powerful, but I can certianly see how dangerous those really are. A good word of advice for anyone thinking of purchasing one (or more) just to play around with: don't.

El_Roberto

Sun Feb 22 2009, 09:40AM

Registered Member #1774 Joined: Wed Oct 22 2008, 02:51AM
Location:
Posts: 135

Nasty, I once saw somone cut their finger of by crushing half of it in a door, I never messed around with doors again (I was 12 at the time). This looks almost as nasty, I had no idea perminent magnets are powerfull enough to do this. How can so much energy be stored in the magnet? I'd think they'd lose strength really fast.

Conundrum

Sun Feb 22 2009, 11:58AM

Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061

Molecular scale domains lining up IIRC. Best analogy is like the cells in an electric eel producing kilovolts when each modified muscle cell generates 100+ mV

badastronaut

Sun Feb 22 2009, 08:27PM

Registered Member #222 Joined: Mon Feb 20 2006, 05:49PM
Location:
Posts: 96

Those pictures were unnecessarily gross. I could have gone without seeing them....

What would you do with such large magnets anyway? The only thing I can thnk of are weird eddy current experiments. I guess you could make a sucky alternator with them.

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