How to Purchase A Right Neodymium Magnet
Before purchasing a magnet, you should familiarize yourself with the different types and features. A neodymium magnet is a very popular permanent super magnet. Nd has an atomic weight of 60 on the periodic table. It is in the rare earth (lanthanide) family. Because of its strength, this alloy of Neodymium, Iron and Boron is supplied worldwide. When compared to other permanent magnets, NdFeB is still the strongest. It is roughly 5 to 7 times stronger than hard ferrite or ceramic magnets. SmCo, the initially founded rare earth magnet, is also stronger than Alnico magnets and ceramic magnets.
Even so, its magnetic field is weaker than neodymium’ s. Because of this fact, customers can pick between samarium cobalt magnet and NdFeB magnets based on how they intend to apply them. The strength of neo magnets is known by their N-rating or grade. This rating ranges between N35 and N55. Magnets get stronger as one climbs the ladder. Some applications require small and less powerful permanent magnets. If a customer picks a neodymium magnet, they should focus on its N-rating. This is the only way they can tell between a stronger and weaker magnet. The grade brings equilibrium between the thermal aptitude and MEP (maximum energy product) of a material.
If the poles of a magnet are not symbolized by colors, one could use a gauss meter or a compass direction to identify them. Additionally, if they already have another magnet, with identified North Pole and the South Pole, they can use it to discover the poles of their new NIB magnet. Another thing to note about the poles is that they have equal strength. None of them has unique surface gauss. The magnetic field density at the surface of a given magnet is measured with a Gauss Meter and measurement is either in Gauss or Tesla. Finally, a Neo magnet with a single pole does not exist. It cannot be found online or offline.
Another thing to consider when purchasing a neodymium magnet is its pull force. This is the force needed to perpendicularly remove a magnet from a flat plate made of steel. A dependable manufacturer and seller will mention this on their blog, FAQ section or product description. The labeled pull force is usually the maximum weight the magnet in question can support. An interested and passionate customer may want to know if there is anything they can do to a magnet to make it stronger.
This is possible in given projects. The flux density from an unused area of a magnet is transferred to a used one. For instance, it could be moved from the rear side of the magnet to the top side. Another way to enhance the magnetic field is to stack a few magnets together. This will boost the magnet’s strength up to a given diameter to thickness ratio. The recommended stacking ratio is 1:4. Beyond this one will not notice any effect on the measured surface gauss.