Magnets are very useful and interesting, but they are not without danger. Before handling or using magnets, please read the following recommendations and remember, safety first! 1. There is a danger of cracking or chipping Neodymium magnets have very strong magnetic force. Put two magnets together, even if they are very small magnets, they will attract each other, jump to each other with great acceleration, and then slam together. This is the most common cause of magnet fracture. It is possible that one or both magnets may be broken or broken. Due to the force exerted by the magnet, the fragments generated by the collision of the magnet may fly into human eyes at high speed. Therefore, we recommend that you wear goggles when handling multiple neodymium magnets. Shards and broken magnets are sharper, so treat them with care like broken glass. 2. The danger to children Children should always supervise children when handling or playing with magnets. Children who may swallow magnets should always stay away from magnets. You can often see news about children eating magnets. If more than one magnet is swallowed, they will attract each other through the intestinal wall, jam and squeeze the digestive tract, causing severe swelling and even life-threatening, requiring surgery. It is best to keep all neodymium magnets out of the reach of children. 3. Crushed fingers or broken bones Larger magnets can crush human fingers and fractures. 4. Magnetically sensitive items need to keep a safe distance Neodymium magnets are ten times stronger than ordinary magnets. Keep a safe distance (at least 20 cm) between the magnet and all objects that may be damaged by magnetism. Mechanical watches, pacemakers, cathode ray tube monitors and televisions, credit cards, disks and other magnetic storage media (such as video tapes) are all affected by powerful magnets. 5. Affect the pacemaker There is a general lack of understanding of how magnets affect pacemakers. The operation of the pacemaker will be affected by the close proximity of the magnet. Most pacemakers are made of metal, and metal needs to avoid contact with strong magnetic fields. Because under the magnetic field, the pacemaker will stop working because of the magnetic field. This will have a serious impact on patients during emergency work, causing unnecessary casualties. Therefore, it is recommended that you do not place magnets around the pacemaker.

Magnetic materials are an important class of basic functional materials with a wide range of applications, including electronics, information, power tools, automobiles, home appliances and other industries. The demand for magnetic materials is irreplaceable. At the same time, because we advocates energy conservation, environmental protection, and green development, as a kind of clean energy, magnetic materials are more and more widely used in emerging fields such as energy saving and environmental protection, new energy, electric vehicles, smart cities, and smart earth. They have even begun to be used in robots, drones, aerospace, Satellite remote sensing and other military and national defense fields.

Motor customers often encounter the problem of permanent magnet demagnetization. What is going on? What could be caused by it? 1. Demagnetization caused by the permanent magnet material itself Motor permanent magnet The servo motors we currently use all use neodymium iron boron permanent magnets (arc-shaped). The neodymium iron boron permanent magnets have the advantages of high remanence and high intrinsic coercivity. It is the permanent magnet material with the highest magnetic performance at present. The content of rare earths is high, iron and boron are cheap, and they do not contain cobalt, a strategic material. However, the disadvantage of NdFeB permanent magnet materials is poor thermal stability. The NdFeB permanent magnets with the magnet grade N38SH we use have a temperature resistance of 150℃. As long as the temperature exceeds 150℃, it will cause irreversible demagnetization. Iron-boron permanent magnets contain a large amount of iron and neodymium metal materials, and the surface is easy to oxidize. Generally, there will be epoxy resin coating or electrophoresis or electroplating coating. If the coating process is unqualified, the permanent magnet will be locally oxidized during use. And cause demagnetization. 2. Demagnetization caused by motor design If the motor does not fully understand the operating conditions of the motor during the design, so that the actual operating point is below the inflection point of the demagnetization curve, then irreversible demagnetization will occur during use. In addition, the operating point usually calculated during the design is often the average operating point of the permanent magnet , And due to the local differences of the permanent magnet materials, the maximum demagnetization operating point of the permanent magnet must be calculated. In addition, the motor design must fully consider whether the internal temperature rise of the motor is within 105K, if it exceeds this range, it will also cause irreversible demagnetization. 3. Demagnetization caused by improper use The environment where the motor is used is harsh, especially high temperature or severe mechanical vibration, which may demagnetize the motor's magnets; in addition, the motor will be irreversibly demagnetized due to excessive temperature when the motor is overloaded for a long time.

Magnets are very common. In our home, you can easily find some magnets. Many of our household appliances can’t work without magnets. Let’s see where magnets are used in the house and what role do they play? 1. Magnets for books If you are a bookworm and often read, then you may find that some books on your shelf use magnets (such as neodymium magnets) to keep them closed. 2. Magnetic knife holder For many people, how to properly place some sharp kitchen utensils, such as knives and forks, has always been a very headache. We all know that putting sharp knives in drawers is very dangerous. With the help of magnets, Sharp knives and forks can be safely held on the knife holder on the wall. 3. Microwave magnet Almost every family has a microwave oven, which brings a lot of convenience to our daily life, but have you ever thought that magnets play a very important role in microwave ovens? Usually, there are two magnets in the magnetron in the microwave oven, which are used to guide the electron to heat the food. 4. Magnets for laptops Many small parts of our commonly used laptops use magnets. For example, magnets are used in laptop speakers and small fan motors. In addition, you can also find a magnet on the hard drive of a laptop, usually on the lid, so that the computer can know whether the lid is open or closed. 5. Telephone magnet The mobile phones we often use also have magnets, and small magnets are used in microphones and speakers to capture and emit sound. 6. Magnet for vacuum cleaner Magnets are also one of the important parts of vacuum cleaners. The working principle of the vacuum cleaner is to use a motor to drive the blades to rotate at a high speed and generate negative pressure air in the sealed shell to collect dust. The motor of the vacuum cleaner uses a powerful neodymium magnet to generate high suction. 7. Horn magnet One of the most important equipment in our home audio system is the speaker. You can find magnets in all speakers. Magnets can interact with the coils in the speakers to produce sound. In order to produce powerful sounds, some small high-power speakers use Neodymium magnet. 8. The magnet of the treadmill Treadmill is a good choice for home fitness equipment. Normally, a magnet is needed on the treadmill. When we are running on the treadmill, when the machine moves, a magnet passes through the sensor to calculate the number of revolutions and convert it into distance information. . 9, handbag magnet Many girls like handbags, not only because they are useful, but also because they represent fashion.Handbags are known for using magnets. Due to the power of magnetism, these magnets can easily close the handbags together.

Small and medium-sized magnets can usually be separated by hand by sliding the end magnet off of the stack. Medium-large magnets can often be separated by using the edge of a table or countertop. Place the magnets on a table top with one of the magnets hanging over the edge. Then, using your body weight, hold the magnet(s) on the table and push down on the magnet hanging over the edge. With a little work and practice, you should be able to slide the magnets apart. Just be careful that they don't snap back together once they become separated.  For very large magnets (generally 2" and larger), we use a specially made magnet separating tool.

Yes. Neodymium Iron Boron magnets are sensitive to heat. If a magnet heated above its maximum operating temperature (176°F (80°C) for standard N grades) the magnet will permanently lose a fraction of its magnetic strength. If they are heated above their Curie temperature (590°F (310°C) for standard N grades), they will lose all of their magnetic properties. Different grades have different maximum operating and Curie temperatures. See our Neodymium Magnet Specifications for more details.