What to pay attention to when ordering strong magnets
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line-height:180%;'>1. Performance: Strong magnet refers to a powerful magnet, professional name: rare earth magnet, neodymium iron boron, this kind of magnet generally has higher performance and is commonly used in toys and packaging boxes , Lamps, handicrafts, speakers, medical machinery, health care products, electronic products, hardware tools and other products, generally N33, N35, N38 are suitable, these three are the most common performance of neodymium iron boron strong magnetism, under normal circumstances, If the requirements are not very high, these three performance magnets are almost the same. High performance above N40: This performance is generally used in mobile phones, precision instruments, aerospace, and cutting-edge scientific research. It can be divided into nine types: N40, N42, N45, N48, N50, and N52. The temperature resistance of the above nine properties is ≤80℃. Once the temperature exceeds this temperature, it will be demagnetized. Therefore, if the customer considers high temperature resistance and high performance, then the following properties are recommended: 1. The data ends with M, for example ：N50M temperature resistance is generally ≤100℃ 2, the data ends with H, for example: N48H temperature resistance is generally ≤120℃ 3, the data ends with SH, for example: N45SH temperature resistance is generally ≤150℃ 4, the data is followed by UH ends, for example: N35UH temperature resistance is generally ≤180℃ 5, and the data ends with EH, for example: N35EH temperature resistance is generally ≤200℃ The above five properties are high temperature resistance type. If the temperature exceeds the predetermined temperature, the magnet It will demagnetize. Second, coating Many customers don’t understand what coating means. NdFeB magnets generally require coating, which can prevent rust and also beautiful. There are generally two types of coatings: zinc plating and nickel plating. Galvanized is generally white, the surface looks like the color of stainless steel, the price is the cheapest; nickel plating is generally silver-white, looks like silver, the price is more expensive than galvanized, but the color of nickel The color is better than zinc, and the plating layer is also longer than zinc, and it is not easy to peel off. There is another case for the coating. Generally European and American customers are very fancy about environmental protection, so they require the magnet to be environmentally friendly. In this case, the price is relatively more expensive. The surface of the environmentally friendly zinc (blue zinc) plating looks blue, but the surface of the magnet It's still white. There is no difference in nickel plating. 3. Tolerance requirements The strong magnetic tolerance is calculated and processed according to the standard tolerance for general manufacturers. The standard tolerance is ±0.05 wire (1 mm u003d 100 wire). If the customer has no tolerance requirements, it will be processed according to this standard. 4. Magnetizing direction General disc: Axial magnetism and radial magnetism Axial magnetism: Ordinary magnetism, generally divided into N and S poles, the magnetic force is on the front and back of the disc, if it is cylindrical It is radial magnetization at both ends: generally there are more cylinders. After magnetization, the magnetic force will be on the entire cylinder instead of the two ends, which is just the opposite of axial magnetization. Here is the focus on the direction of the block's magnetization: It has a wide range of uses. After many customers reported the size and performance of the block, when I asked them which direction is the magnetizing direction, they all said they didn’t know, and they didn’t know. It should be understood that the price of magnetizing is different if the magnetizing direction is different, and if the magnetizing direction is wrong, the magnets made will be useless. This is mainly for strong magnetic blocks: F30*10*5 mm. Generally, the direction of magnetization of the block is in the thickness, which is the last number. For example, if it is the thickness of magnetization, it should be 5. In this case , The attraction surface of the magnet is the two large surfaces of 30*10. Generally, magnets are divided into SN poles, which means that the SN poles of this square magnet are on the two large surfaces of 30*10.