0769-23388351
Toggle Navigation
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.
Related magnet calculation tools;
Magnetic pull force online calculation
This product is round ferrite magnet with a diameter of 9mm and a thickness of 3mm, the performance class is Y30, magnetized in the thickness direction, without electroplating protective layer, the magnetic force is usually 700-1000gs, the working temperature is -40°C to +250°C, Suitable for sensors, suction parts, electrical appliances, Hall induction....
This is a very small size rectangular block magnet with galvanized surface, 3mm length, 1.5mm width and height, with very fine tolerance, magnetized by lengthwise direction, mainly used in precision electronics, instrumentation, please contact us if you need to buy....
Flat magnets can be flat square magnets or round magnets. Today's sample is a flat rectangular magnet, with a length of 20mm, a width of 10mm, a thickness of 1.5mm, and a zinc coating on the surface. Thickness magnetization is used for thin workpieces. The use of this relatively flat neodymium rectangular magnet requires special attention....
Looking for suppliers of radial 16 pole ring magnet and multi-level magnetic ring, welcome to contact carrich magnet manufacturers in China. We have more than 10 years of experience in the motor magnet industry. Our products have many specifications and good performance, which are highly praised by customers at home and abroad. We welcome to provide specifications, samples and batch prices....
This is a dedicated to screwdrivers, drills on top of the ring magnet, the material is rare earth neodymium, N38 grade, outer diameter 15mm, height 10mm. hole diameter 7mm, the use of very simple, is to set the magnetic ring in the screwdriver (screwdriver head) on top of the purchase of the hole is recommended to be larger 1mm....
Product name: 9.5mm diameter thickness 1.5mm neodymium intense magnetic，Type of magnet: permanent magnet，Magnet shape: Round，Magnet class: n45，Tolerance: ±0.05，Coating: conventional nickel copper nickel，Pull: About 1.6 pounds，Magnetic strength: about 2200 Gauss....
This is a C8 grade ceramic ferrite block rectangle, with white marks made according to the customer's requirements. The magnet size is 13mm long, 11mm wide and 10mm thick. If you are interested in such a magnet, you can contact us to provide you with samples, prices,...
This is a 6-pole ring magnet made of injection molded ferrite, with an outer diameter of 9.5mm, an inner hole of 1mm, a thickness of 2mm, single-sided 6-pole magnetization, 3 N poles and 3 S poles. It is mainly used for Hall encoder....