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The vast majority of people's knowledge of magnets is the force between the magnetic poles and the magnetic field on ferromagnetic objects. In fact, in addition to the conventional surface magnetism, magnetic flux and magnetic moment, attraction can also be used as a relative measurement of magnetic properties in specific applications. The attraction of permanent magnets can be roughly calculated by certain formulas, and some foreign companies have also introduced formulas for calculating the attraction of magnets.
Factors affecting the suction force of permanent magnets ?
1. Type (shape) and grade of magnet;
2. The magnetic pole area of the magnet;
3. The working temperature range of the magnet;
4. The air gap between the magnet and the test steel plate. According to the finite element analysis results, the suction force of the permanent magnet decreases with the increase of the air gap, and even a small air gap will have a huge impact on the suction force.
The influence of air gap on magnet attraction;
5. Test the steel plate. The test steel plate should use low-carbon steel with high magnetic permeability and sufficient thickness to avoid magnetic saturation. In addition, the flatness and roughness of the tested steel plate are the source of the air gap and are easily overlooked.
As a magnet supplier in China, we can provide you with rare earth neodymium magnets, ceramic ferrite magnets and multi-pole magnetic rings at competitive prices.
More introduction of magnetic attraction;
Are there any ultra thin magnets with strong suction?
1mm thick round neodymium magnet magnetic field strength and suction force
This is a multi-pole magnetized bonded neodymium magnetic ring, mainly used in electric motors, the outer diameter of the ring is 25.8mm, the height is 40mm, it can be 4-pole or 8-pole magnetized, samples are available, welcome to inquire about price or other sizes....
Our common epoxy coated magnet is black epoxy, but in fact the epoxy can be many colors, such as red, green, white, you are now seeing this is a red round neodymium magnet, is the use of red epoxy coating, the material is neodymium-iron-boron, the diameter of 5mm, the thickness of 2mm...
This product is a block neodymium magnet with a length of 25 mm, a width of 10 mm and a thickness of 2 mm. It has a small tolerance and belongs to the 1-inch block permanent magnet series. It has a double-sided magnetic force, and its magnetic strength is around 1900 gauss....
This is a 5mm thick ring magnet made of sintered rare earth neodymium, the outer diameter of the ring is 62mm, the inner hole is also relatively large, 54mm, belongs to the medium size neodymium ring magnet, there is no need to customize in stock, axial magnetization, nickel plated surface, silver white,...
Product Name: Customized T-shaped NdFeB Magnet，Shape: T-shaped, convex，Size: customized，Grade: N35-N52，Tolerance: ±0.1mm，Place of Origin: Dongguan, China, Our company has great advantages for this T-shaped magnet, special-shaped neodymium magnet, especially the high-performance grade, you are welcome to come to the drawing consultation....
This product is a through hole ring magnet with diameter 10mm, thickness 5mm, hole 5mm, galvanized on the surface, magnetized in thickness direction, N35-N52 grade can be selected, the highest temperature is 80-220 degrees, and it is packed as foam + carton + magnetic separator plate + outer box. If you want to know the price, please send us an email....
This is a customized 2.5 inches powerful ring magnet, material is rare earth neodymium, the outer diameter of the ring 65mm, hole 46mm, thickness 8mm, the surface of the conventional nickel-plated treatment,...
This is a bonded neodymium magnet with an outer diameter of 44.6mm, an inner diameter of 39.8mm and a height of 6.8mm. It has 16-pole magnetization in the radial direction, 8 N poles and 8 S poles. Because it contains rare earth components, its magnetism is relatively strong, generally reaching more than 2000 gauss. These magnets are ideal for consumer electronics (digital cameras, video cameras, TV sets, DVD players, computers, servers),...