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Gary Kruse Regular user Colorado Springs 146 Posts |
Can anyone point me to some info that explains how I can make my old magnetic coin a little stronger? I have two sets; both from Johnson and one is definitely stronger than the other.
Any ideas? Gary |
montemagic Elite user San Diego, CA 471 Posts |
I searched google for "how to recharge a magnet" and from what I read you need to create a powerful electromagnetic field in order to recharge the magnet. The following was taken from a website that offers a rental "remagnetizer". I don't know if this helps. Oh, they sell the machine for $75.00, but if you read the description you can see that they match up the poles of your magnet to a rare-earth (or neodymium) magnet. Rare-earth magnets are much stronger than regular magnets, so if this works all you need is a rare-earth magnet. I don't know if the coins are axially or diametrically magnetized, but try searching google it is a wealth of information.
http://www.science-is.com/rentals.htm Remagnetizer For revitalizing old Alnico, steel bars and horseshoe magnets. Save your science department time and money every school year. Instead of throwing away expensive Alnico, horseshoe and bar magnets that have lost their magnetism due to improper storage and repelling experiments, remagnetize them as often as you need with The Remagnetizer. (Other modern magnet materials such as ceramic, neodymium & samarium cobalt do not need remagnetizing.) Simply "recharge" your magnets by matching up opposite poles with The Remagnetizer (N to S and S to N). When the poles attract, the superior magnetism from the large neodymium magnets within The Remagnetizer rejuvenates the weak Alnico magnets. Adult supervision recommended. $5.00 per day, $20.00 per week
Aim To Amaze
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randirain Inner circle Fort Worth, TX 1650 Posts |
I saw on the History Channel once a whole thing about magnets.
It was cool. Any way... They were showing how they made neodymium magnets. First the metal isn't normally magnetic, they make it that way. Which was something I didn't know. On this show... They did not use an electro magnet coil to charge it. It was a crazy process. It used liquid nitrogen and other stuff. Now of course I could be wrong on all this, and if I am, I'm sure someone will correct me. I do not claim to be an expert here. I am just telling you what I saw. So... it might be kind of hard to charge a magnetic coin. Because I do know that it is neodymium inside the coin. I have seen one fall apart before. I do stuff with magnetic coins... From my experience, Johnson is the best hands down. Sasco is the worst. Actually JB Magic makes some that are pretty good, but hard to find. I talked to him at TAOM 2006 and asked him whats up. His were much cheaper than Johnson, so I wanted to know. He said he has been busy making his new three fly trick, but should be getting some out soon. But who knows... Randi |
caubeck Elite user 412 Posts |
You can't remagnetise a coin without special equipment, and the process costs more than a new coin. You can't recharge it with another neo magnet.
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Mediocre the Great Inner circle Rich Hurley 1062 Posts |
I used to magnatize the tip of a screwdriver by stroking the tip over a strong permenent magnet. I would assmume this would work with any magnetic material. Just make sure you stroke and lift, always passing by the magnet in the same direction. Try it, you have nothing to loose but a sore arm.
I don't think this will ever make it a strong magnet however.
Mediocrity is greatly under rated!
-------------------------------------------- Rich Hurley aka Mediocre The Great! www.RichHurleyMagic.com |
Gary Kruse Regular user Colorado Springs 146 Posts |
Thanks for the suggestions. I'll give re-magnetizing a try knowing that it is unlikely going to work well.
Gary |
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