Strongest magnets you can buy?

Discussion in 'Off Topic' started by fustercluck, Jan 2, 2008.

  1. fustercluck

    fustercluck Diamond Member

    Joined:
    Dec 29, 2002
    Messages:
    7,404
    Likes Received:
    0
    Somehow I stumbled upon to this magnet site, and it got me wondering what the strongest magnets you can buy are. It seems the strongest ones they sell are these here. Why i'm interested in these I have no idea. Might be fun to fiddle around with, and they're pretty cheap. Would just have to keep them away from electronics :p
     
  2. Doodoo

    Doodoo Golden Member

    Joined:
    Feb 14, 2000
    Messages:
    1,423
    Likes Received:
    0
    Those only have 24lbs of pull force...i've seen some with 60 and i'm sure there are stronger ones out there. Gotta be careful with those...they'll mess up your fingers if you get em stuck between the magnets.
     
  3. Nohr

    Nohr Diamond Member

    Joined:
    Jan 6, 2001
    Messages:
    7,273
    Likes Received:
    5
    The grade tells you how strong they are, those being N40. Grade N54 is the strongest neodymium magnet according to wikipedia.

    K&J Magnetics has some N52 magnets. The larger ones are not toys.
     
  4. FoBoT

    FoBoT No Lifer

    Joined:
    Apr 30, 2001
    Messages:
    63,094
    Likes Received:
    8
    http://www.kjmagnetics.com/safety.asp
     
  5. homercles337

    homercles337 Diamond Member

    Joined:
    Dec 29, 2004
    Messages:
    6,341
    Likes Received:
    1
    In for 1...
     
  6. fustercluck

    fustercluck Diamond Member

    Joined:
    Dec 29, 2002
    Messages:
    7,404
    Likes Received:
    0
    At what grade do magnets become dangerous? :p

    Also, how do they ship such strong magnets? Just curious.
     
  7. five40

    five40 Golden Member

    Joined:
    Oct 4, 2004
    Messages:
    1,875
    Likes Received:
    0
  8. fustercluck

    fustercluck Diamond Member

    Joined:
    Dec 29, 2002
    Messages:
    7,404
    Likes Received:
    0
  9. adairusmc

    adairusmc Diamond Member

    Joined:
    Jul 24, 2006
    Messages:
    6,968
    Likes Received:
    11
    They have an 800lb pull force magnet here -

    http://www.unitednuclear.com/magnets.htm

    Look under supermagnets.

    I have a number 32 ( 535lb full force) myself. I have to keep it out in the garage. It WILL make metal stuff fly from quite a ways away.
     
  10. Nohr

    Nohr Diamond Member

    Joined:
    Jan 6, 2001
    Messages:
    7,273
    Likes Received:
    5
    It's not just the grade, it's the size as well. If you're just looking for something to play around with I don't think I'd buy anything larger than an 1/4" cube. Even that will give your finger a good pinch if you aren't careful.

    Regarding K&J's 1.5" N42 cubes: "These 1 1/2" cubes are incredibly powerful and must be handled with care to avoid personal injury and damage to the magnets. Two of these cubes stuck together are impossible to separate by hand."
     
  11. fustercluck

    fustercluck Diamond Member

    Joined:
    Dec 29, 2002
    Messages:
    7,404
    Likes Received:
    0
    What do you use it for? With that much pull force, how far away do you have to keep it from electronics?

    Again, just curious and bored here :p
     
  12. xboxist

    xboxist Diamond Member

    Joined:
    Jun 25, 2002
    Messages:
    3,027
    Likes Received:
    0
    I read the topic as "Strongest midgets you can buy?"
     
  13. Nohr

    Nohr Diamond Member

    Joined:
    Jan 6, 2001
    Messages:
    7,273
    Likes Received:
    5
    I've got some of these little guys, 1/8" diameter x 1/16" thick. One will hold a sheet of paper on my fridge easily. :D It can barely hold 3 sheets if you're gentle. Pretty amazing for such a tiny little thing.
     
  14. adairusmc

    adairusmc Diamond Member

    Joined:
    Jul 24, 2006
    Messages:
    6,968
    Likes Received:
    11
    I actually bought it for my nephew. He was doing a science fair project, and came to me for a unique idea. We made a rail gun, though we ended up using a bunch of the smaller ones from that site instead (I did not fully know how to make one myself, I thought at first one big magnet and one smaller one would do the trick). It was definitely overkill.

    As far as electronics, I would try to keep it at least 40 feet away if possible. They aren't joking when they say on that site that you have to plan your route when you are carrying one of those.

     
  15. shiner

    shiner Lifer

    Joined:
    Jul 18, 2000
    Messages:
    17,118
    Likes Received:
    0
  16. JackBurton

    JackBurton Lifer

    Joined:
    Jul 18, 2000
    Messages:
    15,995
    Likes Received:
    14
    Wow, that is freakin' crazy!
     
  17. Quasmo

    Quasmo Diamond Member

    Joined:
    Jul 7, 2004
    Messages:
    9,631
    Likes Received:
    1
    I was waiting for this site to pop up.
     
  18. Miramonti

    Miramonti Lifer

    Joined:
    Aug 26, 2000
    Messages:
    28,529
    Likes Received:
    84
    You know the refrigerator magnet is too strong when you open the door and find the pickle jar stuck to it.
     
  19. Leros

    Leros Lifer

    Joined:
    Jul 11, 2004
    Messages:
    21,883
    Likes Received:
    6
    So if you can't carry a magnet through a room with electronics or within 10 feet of metallic objects, how the heck do you ship it? It would get stuck to or break other objects. It would interfere with the computer in whatever vehicle is moving it. Or it would get stuck to the vehicle moving it.

    Single magnet on a wooden horse-drawn carriage?
     
  20. BrokenVisage

    BrokenVisage Lifer

    Joined:
    Jan 29, 2005
    Messages:
    24,781
    Likes Received:
    3
    I'll take Danny DeVito for $200
     
  21. flxnimprtmscl

    flxnimprtmscl Diamond Member

    Joined:
    Jan 30, 2003
    Messages:
    7,963
    Likes Received:
    0
    That's what I'm wondering too. Anyone have an answer to this one?
     
  22. invidia

    invidia Platinum Member

    Joined:
    Oct 8, 2006
    Messages:
    2,152
    Likes Received:
    0

    They aren't joking. I've seen and used magnets similar to the #33 and stronger smash concrete into pieces. The stronger ones I've used in the lab will attract metal 20-something feet away. We had some guy's glasses (the screws) fly off his face onto the magnet.
     
  23. invidia

    invidia Platinum Member

    Joined:
    Oct 8, 2006
    Messages:
    2,152
    Likes Received:
    0
    double post
     
  24. Agentbolt

    Agentbolt Diamond Member

    Joined:
    Jul 9, 2004
    Messages:
    3,342
    Likes Received:
    0
    Awesome scenario: Buy two of these super duper magnets, have a friend stand 20 feet away or so, and then throw them at each other. They'd vaporize each other.
     
  25. MegaVovaN

    MegaVovaN Diamond Member

    Joined:
    May 20, 2005
    Messages:
    4,131
    Likes Received:
    0
    What are these used for?
    Seems like for less than $1000 one can get 3 #33 magnets for unbelievable strength. Woo!

    Also, how do you make a rail gun?