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Old 01-02-2008, 09:56 AM   #1
fustercluck
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Default Strongest magnets you can buy?

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
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Old 01-02-2008, 09:58 AM   #2
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Default Strongest magnets you can buy?

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.
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Old 01-02-2008, 10:01 AM   #3
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Default Strongest magnets you can buy?

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.
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Old 01-02-2008, 10:03 AM   #4
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Default Strongest magnets you can buy?

Quote:
Neodymium Magnet Safety

The neodymium magnets we sell are extremely strong, and must be handled with care to avoid personal injury and damage to the magnets. Fingers and other body parts can get severely pinched between two attracting magnets. Neodymium magnets are brittle, and can peel, crack or shatter if allowed to slam together. Eye protection should be worn when handling these magnets, because shattering magnets can launch pieces at great speeds.

The strong magnetic fields of neodymium magnets can also damage magnetic media such as floppy disks, credit cards, magnetic I.D. cards, cassette tapes, video tapes or other such devices. They can also damage televisions, VCRs, computer monitors and other CRT displays. Never place neodymium magnets near electronic appliances.

Children should not be allowed to handle neodymium magnets as they can be dangerous. Small magnets pose a choking hazard and should never be swallowed or inserted into any part of the body.

Never allow neodymium magnets near a person with a pacemaker or similar medical aid. The strong magnetic fields of the magnet can affect the operation of such devices.

Neodymium magnets are brittle and prone to chipping and cracking. They do not take kindly to machining.

Neodymium magnets will lose their magnetic properties if heated above 175° F (80° C).

Neodymium magnets should never be burned, as burning them will create toxic fumes.

Like any tool or toy, neodymium magnets can be fun and useful, but must always be treated with care.


http://www.kjmagnetics.com/safety.asp
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Old 01-02-2008, 10:04 AM   #5
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Default Strongest magnets you can buy?

In for 1...
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Old 01-02-2008, 10:06 AM   #6
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Default Strongest magnets you can buy?

At what grade do magnets become dangerous?

Also, how do they ship such strong magnets? Just curious.
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Old 01-02-2008, 10:09 AM   #7
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Default Strongest magnets you can buy?

http://www.kjmagnetics.com/pro...=BY0Y0X0%2DN52&cat=168

lol@390lb pull force. Now that would be fun to play with.
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Old 01-02-2008, 10:11 AM   #8
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Default Strongest magnets you can buy?

Quote:
Originally posted by: five40
http://www.kjmagnetics.com/pro...=BY0Y0X0%2DN52&cat=168

lol@390lb pull force. Now that would be fun to play with.
Until it flattens one of your fingers - Cool find.
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Old 01-02-2008, 10:14 AM   #9
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Default Strongest magnets you can buy?

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.
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Old 01-02-2008, 10:15 AM   #10
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Default Strongest magnets you can buy?

Quote:
Originally posted by: ropeadope
At what grade do magnets become dangerous?
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."
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Old 01-02-2008, 10:16 AM   #11
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Default Strongest magnets you can buy?

Quote:
Originally posted by: adairusmc
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.
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
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Old 01-02-2008, 10:16 AM   #12
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Default Strongest magnets you can buy?

I read the topic as "Strongest midgets you can buy?"
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Old 01-02-2008, 10:22 AM   #13
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Default Strongest magnets you can buy?

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. It can barely hold 3 sheets if you're gentle. Pretty amazing for such a tiny little thing.
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Old 01-02-2008, 10:24 AM   #14
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Default Strongest magnets you can buy?

Quote:
Originally posted by: ropeadope
Quote:
Originally posted by: adairusmc
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.
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
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.

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Old 01-02-2008, 10:29 AM   #15
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Default Strongest magnets you can buy?

Good source for magnet information
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Old 01-02-2008, 10:40 AM   #16
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Default Strongest magnets you can buy?

Quote:
Originally posted by: adairusmc
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.
Wow, that is freakin' crazy!
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Old 01-02-2008, 10:50 AM   #17
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Default Strongest magnets you can buy?

Quote:
Originally posted by: adairusmc
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.
I was waiting for this site to pop up.
Quote:
If carrying one into another room, carefully plan the route you will be taking. Sensitive instruments like computers & monitors will be affected in an entire room. Loose metallic objects and other magnets may become airborne and fly considerable distances - and at great speed - to attach themselves to this magnet. If you get caught in between the two, you can be severely injured. These magnets will crush bones in the blink of an eye. Two of these magnets close together can create an almost unbelievable magnetic field that can be incredibly dangerous. Of all the unique items we offer for sale, we consider these items the most dangerous of all. Our normal packing & shipping personnel refuse to package these magnets - our engineers have to do it. This is no joke or exaggeration - and we cannot stress it strongly enough. You must be extremely careful - and know what you're doing with these magnets. Two Supermagnets can very easily get out of control, crush fingers and instantly break ribs or even your arm if opposing poles fly at each other. A small child recently lost his hand when his father left two # 31 supermagnets unattended. The child picked one up and when he approached the other magnet on a nearby table, it became airborne and obliterated his small hand.
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Old 01-02-2008, 10:54 AM   #18
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Default Strongest magnets you can buy?

You know the refrigerator magnet is too strong when you open the door and find the pickle jar stuck to it.
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Old 01-02-2008, 11:00 AM   #19
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Default Strongest magnets you can buy?

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?
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Old 01-02-2008, 11:24 AM   #20
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Default Strongest magnets you can buy?

Quote:
Originally posted by: xboxist
I read the topic as "Strongest midgets you can buy?"
I'll take Danny DeVito for $200
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Old 01-02-2008, 11:37 AM   #21
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Default Strongest magnets you can buy?

Quote:
Originally posted by: Leros
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?
That's what I'm wondering too. Anyone have an answer to this one?
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Old 01-02-2008, 11:38 AM   #22
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Default Strongest magnets you can buy?

Quote:
Originally posted by: Quasmo
Quote:
Originally posted by: adairusmc
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.
I was waiting for this site to pop up.
Quote:
If carrying one into another room, carefully plan the route you will be taking. Sensitive instruments like computers & monitors will be affected in an entire room. Loose metallic objects and other magnets may become airborne and fly considerable distances - and at great speed - to attach themselves to this magnet. If you get caught in between the two, you can be severely injured. These magnets will crush bones in the blink of an eye. Two of these magnets close together can create an almost unbelievable magnetic field that can be incredibly dangerous. Of all the unique items we offer for sale, we consider these items the most dangerous of all. Our normal packing & shipping personnel refuse to package these magnets - our engineers have to do it. This is no joke or exaggeration - and we cannot stress it strongly enough. You must be extremely careful - and know what you're doing with these magnets. Two Supermagnets can very easily get out of control, crush fingers and instantly break ribs or even your arm if opposing poles fly at each other. A small child recently lost his hand when his father left two # 31 supermagnets unattended. The child picked one up and when he approached the other magnet on a nearby table, it became airborne and obliterated his small hand.

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.
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Old 01-02-2008, 11:40 AM   #23
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Default Strongest magnets you can buy?

double post
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Old 01-02-2008, 11:51 AM   #24
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Default Strongest magnets you can buy?

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.
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Old 01-02-2008, 11:57 AM   #25
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Default Strongest magnets you can buy?

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?
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