The two polarities of a magnet repel each other (magnetic repulsion: like poles repel each other)

For the magnets in our life, everyone should be most familiar with their adsorption ability, and besides this, they also have a very important feature: the same poles repel each other, that is, when two magnets with the same magnetism are close, they will repel each other and will not adsorb together. This repulsive force is magnetic repulsion. Next, we will introduce this characteristic in detail from three aspects: size specification, performance grade and high temperature resistance.

As a professional manufacturer of magnets, Sanen Magnetic Industry can provide customers with a variety of size choices, flexibly meet the needs of different projects, and provide you with a wide range of highly customizable magnet solutions to meet your diverse needs. Let’s learn about magnetic exclusion together!

I. Dimensions and specifications

The size and specification of the magnet are determined according to the customer’s requirements, uses and the magnetic force to be borne. Under the condition of the same size and specification, the magnetic force that the magnet can bear will be different. Generally speaking, the larger the suction, the larger the size of the magnet, but try to reduce the size of the magnet under the premise of ensuring the suction, so as to facilitate the use of customers in the project. The smallest size and diameter that magnets can produce are generally about 1mm, and the largest size can reach more than 500 mm. At the same time, there are many shapes of magnets, the most common ones are round, square, strip, ring, etc. If customers have special shape requirements, they can also be customized.

The two polarities of a magnet repel each other (magnetic repulsion: like poles repel each other)

Second, the performance brand

The performance grades of magnets are classified according to their magnetic ability. At present, the commonly used magnet performance brands in the world are N, H, SH, UH and EH grades. These grades represent the maximum magnetic energy product and the upper temperature limit that the magnet can bear, and also represent the price and production difficulty of the magnet. Generally speaking, the higher the performance grade, the greater the maximum magnetic force it can bear, but the price and processing difficulty also increase. When customers choose magnets, they need to consider the performance, use and budget of magnets.

Third, high temperature resistance

The two polarities of a magnet repel each other (magnetic repulsion: like poles repel each other)

The high temperature resistance of magnets means that magnets still maintain good magnetic ability in high temperature environment. Generally speaking, the high temperature resistance of N and H magnets is about 80℃, while the high temperature resistance of SH, UH and EH magnets can reach above 200℃. When selecting magnets, customers need to choose suitable magnets according to the use environment, so as to avoid the failure of magnets due to excessive temperature. At the same time, if magnets need to be used in high temperature environment, the high temperature resistance of magnets can be improved by adding rare earth elements.

To sum up, magnetic repulsion is a very important characteristic of magnets. Size specification, performance grade and high temperature resistance are the key factors affecting magnetic rejection, and customers need to consider them comprehensively when choosing magnets. If you need magnet-related products and services, please contact Sanen Magnetic Industry!

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