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Neodymium Ring Magnets

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Neodymium Ring Magnets

• Strongest magnetic performance
• With countersunk hole
• Nickel plated
• N35 grade material
• 80°C max operating temperature

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Neodymium (rare earth) NdFeB ring magnets / NdFeB countersunk ring magnets / NdFeB counterbore ring magnets

A Neodymium(rare earth) ring magnet or NdFeB ring magnet is a NdFeB disc magnet with a concentric hole inside it. A Neodymium countersunk magnet is a Neodymium ring magnet with one side appearing as a standard ring but the other side has an angled countersink to take a screw head, the angle usually being (but not always) 90 degrees. A Neodymium counterbore ring magnet is a ring magnet with a cylindrical flat-bottomed hole on one side that enlarges the main central hole to take a cap head screw.

Alternative Names for Neodymium Ring Magnets

Neodymium ring magnets are also known as Neodymium pure ring magnets, Neodymium countersunk ring magnets are also called Neodymium countersunk magnets, and Neodymium counterbore ring magnets are also called Neodymium counterbore magnets.

All these Neodymium ring magnet variations are nearly always axially magnetised - the magnet is magnetised along its central axis. So one flat end face is a North pole and the other flat end face is a South pole. For pure rings, turning over the ring changes the polarity. But for the NdFeB countersunk rings and the NdFeB counterbore rings the countersunk or counterbore side will be a North or a South and the other end (which will visually look like a pure ring) will have the opposite polarity).

In some applications where a NdFeB counterbore ring is attracting another NdFeB counterbore ring or a NdFeB countersunk ring is attracting another NdFeB countersunk ring you will probably require a set of Norths and a set of Souths to achieve unlike poles attracting. If the magnets are attracting onto a ferromagnetic surface only, the any type of ring magnet (regardless of axial polarity direction) will be fine to consider using (combinations of Norths and Souths together will be fine - sometimes a N-S-N-S alternating pattern may give a small boost in performance if the magnets are close enough).

When we state a ring magnet is a North, the countersunk face or counterbore face will be the North pole face (the other end will be the South pole face). When we state a ring magnet is a South, the countersunk face or counterbore face will be the South pole face (the other end will be the North pole face).

Custom Neodymium Ring Magnets

Nearly all our magnets have a nickel plating. Other platings are possible e.g. epoxy coated. Likewise, different grades of NdFeB are possible. We also produce custom magnets. If there is a size or shape you require that is not shown, we can look to produce it for you. We can produce diametrically magnetised rings if they are required. We can also produce double countersunk rings and double counterbore rings (both ends have a countersink or counterbore).

For note, please do not over tighten the screws onto the NdFeB ring magnets - the material is a sintered powder and too much force on it may cause the NdFeB ring magnet to break.

If you are in any doubt about the choice of magnet, its size or need technical assistance, please contact us. And if you need a quotation for higher quantities or a custom magnet shape, let us know.

If you need magnets for higher temperature applications see our range of Alnico magnets.