magnet, small size magnet, strong magnetic magnet, 2*1,2*2

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.
Circular sizes are generally denoted by the letter D, which stands for diameter (for convenience, most people currently use the letter D instead of the special symbol Φ). For example, D10X1MM indicates a magnet with a diameter of 10 millimeters and a thickness of 1 millimeter. The letter X here represents the mathematical symbol for "times".
The size of the square is 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, such as for F50x25x13, the magnetization direction is the 13mm side, which means the direction of the height-wise magnetization. The NS poles are on the two largest sides, which are the 50x25 sides.
The size specification of a ring magnet is represented by its outer diameter (DX), inner diameter (DX), and height. For example, a ring magnet with a size of 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, ring magnets 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 referred to 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, 42SHMaximum operating temperature: 150 degrees Celsius
30UH, 33UH, 35UH, 38UH, 40UH Maximum operating temperature: 180 degrees Celsius
30EH, 33EH, 35EH, 38EH have a maximum operating temperature of 200 degrees. 30AH, 33AH, 35AHMaximum operating temperature: 230 degrees Celsius
33, 35, 38, 40, and 42 represent the maximum magnetic energy product. The maximum magnetic energy product of N33 neodymium iron boron material is about 33MGOe; the maximum magnetic energy product of N35 neodymium iron boron material is about 35MGOe; the maximum magnetic 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 magnetic 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.