Neodymium (Rare Earth) Magnetic/Physical Properties

Neodymium Magnets are the strongest of all permanent magnets with a strong magnetic field and highly resistant to demagneising when influenced by another magnetic field. Due to their strength they should be handled with care as they can be attract to another magnet or a ferrous surface with a strong force.
These magnets are also inherently fragile and allowing them to attract to a surface with force will cause them to shatter and splinter. Our Pot and Holding range however is designed with a steel surround that not only protects the magnet from physical damage but also redirects the magnetic field making a stronger single sided magnet allowing for a strong holding solution.

As they are the strongest magnet available on the market these have quickly become the most commonly used magnet in items from mobile phones to magnetic separation equipment used in food processing plants to not only protect machinery but also to ensure a ferrous free product.
Magnets New Zealand stock a massive range of Neodymium Magnets in all sizes and shapes to cater to any need, however should you require a size that we don’t stock, we are able to custom make a magnet on request.

Our standard range of Neodymium Magnets have a heat tolerance of up to 80°C, subjecting to temperatures over this will cause the magnet to loose a portion of its magnetism as it looses its magnetic properties and reverts back to its previous state being iron. We have a number of higher grades that allow for a higher heat tolerance up to a maximum of 230°C, use our advanced find a magnet system to filter our high temperature range. If you need a magnet with a higher heat tolerance we would recommend the use of Samarium Magnets that can withstand up to 250°C.

Many of our Neodymium Magnets are nickle coated for protection however if these are placed into an area of high moisture or a chemical environment they will corrode and fail over time making our standard range not suitable for outdoor environments as they lack a waterproof protective layer.

Our Fishing Magnet range is the only exception for this as they are designed to be be used short term in bodies of water, these magnets are a part of our Pot and Holding range and as such uses a steel surround to protect the magnet from physical impacts. When finished these should be thoroughly dried for storage.

If you are wanting a waterproof magnet we have several plastic and rubber encased magnets that are suitable for an outdoor environment, please note that due to the plastic casing there is now an ‘airgap’ between the magnet and the surface it is attracting to which has resulted in a slightly reduced magnetic holding force.

For full technical specs regarding our Neodymium Magnet, please download our Neodymium MSDS sheet.