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I saw many friends on the Internet looking for the formula for calculating the weight of magnets. Today, Xiaofu, the manufacturer of courage magnets, will share with you the weight calculation method of round, ring and block magnets for neodymium magnets.
Magnets of different materials have different densities and need to be replaced before calculation. The following calculation formulas are all taking neodymium magnets as an example, and the density of ferrite is 4.9.
For example: NdFeB Magnet F20x10x3mm, where the density is calculated as 7.5
The formula is: 20*10*3*7.5/1000=4.5g,
The formula for calculating the weight of disc Nd-Fe-B magnet is as follows: (density is calculated by 7.5)
For example, the disc magnet specification is 20.5 x 8.9mm
The formula is: area x thickness x density/1000 = weight (g), that is
7.5 x 3.14 x 20.5² x 8.9/4000=22.02g或7.5 x 3.14 x 10..25² x 8.9/1000=22.02g
Formula for calculating the weight of ring magnet
π x (a+b)(a-b) x c(thickness) x p(density)/4000 [where A and B represent length and width respectively]
For example, the weight of a magnet with an outer diameter of 12mm, an inner diameter of 7mm and a thickness of 3mm is; 3.14 x (12+7) x (12-7) x3 x 7.5/4000 is approximately equal to 1.7g
As for the calculation formula of the motor arc magnet, Xiaofu can't do it yet.
This article is originally shared by Xiaofu, a china magnet manufacturer, to learn more about magnets by clicking on the magnet question and answer.
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