Why would repel each other after magnet disconnected? Magnet manufacturers find a variety of magnet to do the experiment, the results show that the fracture surface magnetic bar magnets broke at the opposite (that appears synonym poles), two of the fracture surface are attracted to each other easily connected together; and the fracture surface at the rear magnet ring and pie fracture are mutually exclusive high mechanical magnet, it is difficult to both pressed together, even if they are hard to be with him, as long as the hand is released immediately will be open to each other, and one will be instantly reversed, the fracture surface at the poles seem to be of the same name. Annular or pie-shaped magnet fracture surface at mutually exclusive reasons: Because the two poles on the torus or round surface, namely the upper and lower surfaces of the N, S pole, after the break, which is still up and down the pole on both surfaces, thus two at the top and bottom of the fracture surface will be two magnet poles specialized in selling machinery, when the fracture surface near the mechanical magnet quote, upper and lower sides of the same name is the corresponding poles, poles of the same name is mutually exclusive, so it will have a fracture surface at the poles of the same name illusion. Once one piece upside down over and will be able to attract firmly together. How to define the performance of the magnet? Mainly has the following three performance parameters to determine the performance of the magnet: remanence Br: permanent magnet magnetized to technical saturation, and after removing the external magnetic field, called the retained residual magnetic flux density Br. Coercive force Hc: to technical saturation magnetization of the permanent magnet B is reduced to zero, the need to add a reverse magnetic field strength is called magnetic induction coercive force, referred to as coercivity magnet machinery Quote | New Tong Xin magnetic | machinery magnet provided by the Dongguan City, Tong Xin magnetic Limited. Dongguan City, Tong Xin magnetic Limited (www.dgxtxmagnet.com/) Dongguan, Guangdong, magnetic leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. New Tong Xin magnetic leadership with the staff warmly welcome all inquiries to discuss, with new magnetic Xin Tong better future.