The third-generation rare earth permanent magnet Nd-Fe-B is the strongest permanent magnet among contemporary magnets, with extremely high potential magnetic performance. Its drawback is poor temperature performance, with significant magnetic losses at high temperatures, and a relatively low maximum operating temperature, usually around 80 degrees Celsius. (Special materials that undergo special treatment can reach a maximum operating temperature of 200 degrees Celsius, but this requires custom quantities!)
Magnetic field direction: For cylinders (disks), the magnetic field is filled in a plane (the two ends are N and S poles), and for long cubes, the largest two surfaces are magnetized (the largest two surfaces are N and S poles), except for those marked. The shapes include disks, cylinders, rings, squares, cubes, tile shapes, fan shapes, and various irregular shapes.
Magnetization direction: N and S poles on the flat surface at both ends
Working temperature: maximum 80°C
Process Galvanized Magnets
Type of Magnet
Specification D5*2mm
Usage Instructions:
1. Temperature: When selecting neodymium iron boron magnets, customers should choose the appropriate magnet grade based on their operating temperature. If the operating temperature exceeds the magnet grade's bearing temperature, the magnet will gradually demagnetize until it becomes non-magnetic. Please ensure that you confirm the operating temperature and the grade suitable for your use before placing an order.
2. Environment If the magnetic device is in a sealed state, it is possible to choose magnetic iron with non-electroplated or white zinc plated surface, which can save costs. If the magnetic iron is exposed to humid air, especially in the salt mist environment, it is recommended to consider using magnetic iron with surface nickel plating. The magnetic iron should be stored in a dry and constant temperature environment, separated with plastic, wood, hard paper, foam, etc., and wrapped well. It should be away from iron and easily magnetized items, such as monitors, bank cards, computers, TVs, mobile phones, etc.
3. User Objectives
Regarding environmental protection, users in relatively developed countries, such as North America, Europe, and others, should pay special attention to environmental matters. Exports must comply with the SGS EU six standards. For users in developing or underdeveloped countries, environmental requirements are not given much consideration.
4. Handling and Storing
NdFeB magnets are hard, brittle, and have strong magnetic fields. They should be handled with care (especially for large sizes and thin pieces). When handling magnets, be careful not to impact them, as they may attract or repel other iron objects. This can easily cause damage to the magnets or injure fingers. Since NdFeB is a multi-metal alloy material with a density between 7.45, it is heavy and brittle. Therefore, special care should be taken when handling to prevent the magnets from breaking. It is also important to maintain a dry storage environment and not to directly pile them on the ground. It is best to place them on thick cardboard or on shelves.
5、 Use Instructions: When two magnets are attracted to each other and cannot be separated, it is recommended to push them apart flatly, rather than forcefully twist or pry. With your left hand, firmly hold the entire length of the magnet, and with your right hand, use your index finger and thumb to move the magnet horizontally. After moving the magnet, do not immediately throw it back into the magnet pile. Please immediately isolate the magnet. Handle with care, keep it away from iron or magnetic objects by about 16 centimeters (6.3 inches), or wrap it in paper and pack it thickly. This will be safer. If you need to put the magnet back into the entire length of the magnet, please slowly put it back, and start to move it in from the edge at a close distance. Always hold the magnet firmly until it has been moved in completely.
Before purchasing neodymium iron boron magnets, the following matters need to be understood by the customer:
1. The magnetic iron sold by Yiwu Haoci Magnetic Materials Factory belongs to neodymium iron boron rare earth permanent magnets, which are all high-intensity magnets. They are the highest commercially available magnetic materials, and are rightly considered the strongest magnets. Due to their excellent magnetic properties, they are known as the "King of Magnets." Please rest assured to purchase and use with caution.
2. Our company produces a variety of specifications, including round, square, circular, irregular, trapezoidal, tile-shaped, spherical, and irregular shapes. We can custom-make high-strength neodymium iron boron magnets based on your samples. All our magnet sizes are measured in millimeters.
【1】圆形尺寸一般用D表示直径(因属于特殊符号为方便目前大多数人使用以D代替Φ),比如D10X1MM表示的是直径是10毫米，厚度是1毫米的磁铁。X这是数学符号"乘号”。
The dimensions of a square are generally represented by the symbol F, where the dimensions are length X width X height. For example, F50x25x13MM indicates that the square magnet is 50mm long, 25mm wide, and 13mm thick. Generally, the last digit indicates the magnetization direction of the square magnet. For example, for the magnet F50x25x13, the magnetization direction is the 13mm side, which is the height direction of the magnetization. The NS poles are on the two largest sides, which are the 50x25 sides.
The dimensions of the ring are indicated by the outer diameter DX the inner diameter DX the height. For example, the ring magnet with D32XD18X6 indicates an outer diameter of 32mm, an inner diameter of 18mm, and a height of 6mm. The height is also known as the thickness. Currently, rings are also divided into straight holes and counterbored holes. Straight holes are drilled vertically, while counterbored holes are divided into large holes and small holes, with the depth of the large holes and the depth of the small holes being commonly known as screw holes.
III. Our company can produce a variety of grades of neodymium iron boron magnets, as follows:
N35, N38, N40, N42, N45, N48, N50, N52 Maximum operating temperature: 80 degrees Celsius
35M, 38M, 40M, 42M, 45M, 48M, 50M Maximum operating temperature: 100 degrees Celsius
33H 35H 38H 40H 42H 45H 48H Maximum operating temperature: 120 degrees Celsius
30SH, 33SH, 35SH, 38SH, 40SH, 42SH Maximum operating temperature: 150 degrees Celsius
30UH 33UH 35UH 38UH 40UH Maximum operating temperature: 180 degrees Celsius
30EH 33EH 35EH 38EH nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp 最大工作温度200度 nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp30AH 33AH 35AH nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbsp nbspMaximum operating temperature: 230 degrees Celsius
33, 35, 38, 40, and 42 represent the maximum energy product. The maximum energy product of N33 neodymium iron boron material is about 33MGOe; the maximum energy product of N35 neodymium iron boron material is about 35MGOe; the maximum energy product of N40 neodymium iron boron material is about 40MGOe. The conversion between MGOe and kA/m3 is 1MGOe = 8kA/m3, which means the maximum energy product of N40 is about 320kA/m3.
The higher the grade of the magnet, the stronger its magnetic force, and the corresponding price is also higher. Therefore, the specific grade should be determined according to the actual needs of the customer. In general, products with low requirements such as packaging, machinery, and stationery are mainly selected with n33 grade. Magnets for medium-low-grade loudspeakers are mostly selected with n35 grade.
Sintered Neodymium Iron Boron Magnets, with an incredible super magnetic force, theoretically have a maximum attraction force hundreds of times their own weight, making them the strongest permanent magnets currently available. Of course, the larger the magnet, the stronger the magnetic force. If you need to custom-make them, please contact our customer service, stating the dimensions, grade, quantity, electroplating layer, tolerance requirements, and magnetization direction you require. We will produce them according to your specifications.
