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RestlessMind
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Is there any way to dampen the strength of a standard magnet? Some kind of material you could put on it to make it weaker?
Thanks!
Thanks!
Bob S said:To reduce the field by about 50%, one solution would be to estimate the cross section of the magnet (e.g., 1" diameter is 0.78 square inches), and "short" one pole to the other by using perhaps 0.25 square inches of soft iron. Several layers of thin sheet metal is better than a single piece of thick steel..
Draven said:Er, well, I just want one side of a typical bar magnet to be weaker than the other side. So if the N side had a pull force of "1" if 2 cm (for example) from the S side of another magnet, then the S side of this same former magnet with the dampener applied would only have "0.5" pull force (or something) with the N side of said latter magnet if the same distance (2 cm) away.
I hope that made sense.
Draven said:Wait... are these the wedges you speak of? I found some at K&J.
http://www.kjmagnetics.com/proddetail.asp?prod=AY0X030-N
I prefer to have a strong one. Sure is expensive though. o_0 This place has them cheaper though: http://www.magnet4less.com/product_info.php?cPath=15&products_id=457 at grade N42, and I don't even need that strong.That's it, but 25 dollars a piece at grade N50.
That's perfect really.Come to think of it they're only an inch long, so, even though the field strength is 2:1 at the surface, the ratio should diminish greatly an inch away.
Draven said:I prefer to have a strong one. Sure is expensive though. o_0 This place has them cheaper though: http://www.magnet4less.com/product_info.php?cPath=15&products_id=457 at grade N42, and I don't even need that strong.
That's perfect really.
Draven said:Is there any way to dampen the strength of a standard magnet? Some kind of material you could put on it to make it weaker?
Thanks!
Hey, I contacted K&J magnetics and they tell me that this magnet: http://www.kjmagnetics.com/proddetail.asp?prod=AY0X030-N has a field density on the outer radius of 6420 Gauss but 6850 on the inner radius. I hope I'm not getting "density" and "strength" mixed up here... or at least, I want to know if on this magnet the inner radius will not attract an object with as much force as the outer radius if they were both placed at the same distance from the same object...OK, the respective areas are 2:1 for magnets in the URL, so 2:1 field stength. Good luck with the purpetual motion machine, or whatever it is.
You're right.The word 'dampen' implies a rate dependency. You want to reduce the field strength of a magnet.
Draven said:Hey, I contacted K&J magnetics and they tell me that this magnet: http://www.kjmagnetics.com/proddetail.asp?prod=AY0X030-N has a field density on the outer radius of 6420 Gauss but 6850 on the inner radius. I hope I'm not getting "density" and "strength" mixed up here... or at least, I want to know if on this magnet the inner radius will not attract an object with as much force as the outer radius if they were both placed at the same distance from the same object...
Draven said:Endcap?
I think the other magnets will be about an inch away, maybe an inch and a half. But I could probably push it to 2 or maybe even 2.5 because of the fact that these are neodymium and very strong...