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About Neodymium Magnets

How is the surface field measured?

Gauss meters are used to calculate the magnetic field density at the surface of a magnet.  Each magnet has the surface field measurement listed in the specifications chart.

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How are neodymium magnets made?

Our neodymium magnets, also known as NIB or NdFeB magnets, are comprised of a neodymium, iron, and boron compound referred to as Nd2Fe14B. This compound is a powdered mixture. It is first poured, then pressed (using extreme pressure) into specially-cast molds. The compound is then sintered (heated under a vacuum), cooled, then ground or sliced into the desired shape.Next, the magnets are dipped in a specified coating material such as zinc, gold, or the triple-layer nickel/copper/nickel alloy plating. Finally, the magnets are magnetized by exposing them to an extremely strong magnetic field. This final step is what turns neodymium magnets...

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Are neodymium magnets the same as "rare earth" magnets?

Yes. Neodymium magnets are part of the rare earth magnet genre because neodymium is a rare earth element (symbol Nd) on the Periodic Table.

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What does pull force mean?

Every neodymium magnet has a pull force, which tells you exactly how strong that magnet is. Measured in pounds or kilograms, the pull force is the force required to pull that magnet straight free from a 1/8 inch (3.175 mm) thick steel plate. The pull force also tells you the limit on the holding power of the magnet.Generally, any magnet with a pull force above seven pounds (3.175 kg) can pinch your fingers. Stronger magnets can be even more dangerous and should only be handled by experienced individuals.Magnet placement can dramatically affect pull force.While the pull force rating enables you...

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Are neodymium magnets waterproof?

No. While magnets are typically coated with nickel, zinc or epoxy to protect them against rust and corrosion from moisture they are not waterproof. Neodymium magnets will work wet or submerged for a short period. Any water penetration into the magnet, however, will cause a slow deterioration of the magnet’s magnetic field and cause rust to leak from even the most microscopic scratch or aberration in the magnet’s outer coating. If you are looking for waterproof neodymium magnets, check out our Sewing Magnets. These magnets are encased in a waterproof PVC pouch that protects them from moisture.

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