What is the second type of magnet in a magnet? Type II magnets are mostly NdFeb.
In the production process of NdFeb, due to operational errors, there are various losses and defective products, but it does not affect the use of products. For example, the production formula was originally N42, but the tested performance of the product produced due to operation error is N38. Such products are defined as second-class magnets.
In the case of machining; Every product has tolerance requirements. If you exceed that, you're a second grade. However, individual customers do not have particularly high tolerance requirements. If the tolerance is around 0.1, then the second grade can be used as normal.
In addition, there are electroplating; Individual customers have high requirements for coating, and they will have high requirements for coating on the surface. You can't have defects, if you have corners or something like that, it's second class, but performance is not affected.
I thought we were holding hands looking for second-class magnets with defective coatings in NdFeb, and all day long our fingers were not fingers... These are the reasons why neodymium magnets appear as type II magnets. Relatively speaking, the price of the second class magnet will be less than the normal product. Some customers can not accept the high price of the case will choose second class magnets. After all, performance doesn't make a difference. .
