How to choose NdFeB strong magnet?

How to choose NdFeB strong magnet?
NdFeB magnets are now widely used in daily life, involving almost all walks of life, such as some high-end motors such as nuclear magnetic resonance wind turbines, and low-end ones such as audio, door magnets, and mahjong magnets.

So when purchasing a powerful NdFeB magnet, how to judge whether the magnet (NdFeB magnet) is good or not? This is a question that many newcomers often encounter. What kind of magnet is good?

First of all, you need to know what is the working environment where your magnet is located?

What are the requirements for the magnetic force and temperature of the magnet?

There is also how the external environment selects the coating required for the magnet.

In terms of magnetic force, you can choose the brand according to your specifications. The temperature is specific. Below 80°C, choose N series; above 80°C, there is H series, which can withstand 120°C; SH series, which can withstand 150°C; UH series, which can withstand 180°C ; And EH and AH above 200°C are available for selection.

Common coatings are galvanized and nickel-plated, and epoxy-plated can be used for those with high requirements. Of course, other coatings, such as gold-plated, can also be plated according to requirements.

Usually the quality of NdFeB is mainly evaluated from two aspects:
1. Appearance: Check whether there are missing edges or corners, whether the electroplating layer is intact, and whether the size meets the design requirements.
2. Performance: The performance of NdFeB has a unified standard, and the main inspection indicators include magnetic energy product, coercive force, and residual magnetism.