First, the magnetism of neodymium iron boron magnet is very strong, and it is hard but brittle. Therefore, when working in the occasions with the vibration, shock and so on, it may break and even fall off. Hit by strong impact, the magnet debris may even scatter. So there should be the design of necessary protection application to make sure that even though the magnet is broken, the debris will not fly out.
Second, neodymium iron boron magnet should be stored in indoor place that is ventilated and dry. Stored in the acidic, alkaline, hot and humid environment, or in the liquid like organic solvent and water, the magnet is easy to rust, and the powder coating shedding of magnet is easy to demagnetize.
Third, the magnet should work in the clean workplace, so as to avoid the iron filings and other small impurities adsorbed on the surface of the magnet.