Where can I purchase magnets? A great place to start is Grainger. The store offers a wide assortment of rare earth magnetics discs, cylinders and discs along with a vast choice of neodymium that include the extremely efficient NdFeB. Rare earth magnets are perfect for everyday use and also offer many industrial applications.
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Most people don’t know that neodymium magnets are used in computers. They are tiny magnets that are hard-core, and are used in hard-drives to store data. When data is written to the drives magnetic cells are constructed of metal. A loudspeaker is powered by the neodymium magnet to create sound.