China Neodymium And Ferrite Magnets Manufacturer & Supplier 
In the category of strong neodymium iron boron magnets, N52 belongs to the high magnetic energy product level and has extremely strong magnetic performance. So, how strong is the magnetic force of N52 magnet with a size of 20x10x5mm in actual use? The following will introduce this issue, hoping to be helpful to you.
Since the shape of this size is not clearly defined, the editor will introduce two possible shapes separately.
Firstly, there is the block shape (block), which is quite common and most likely the shape asked by customers. It is like a small rubber, although it is small, its magnetic force is not small at all. For example, the N52 grade surface magnetic strength of 4300 Gauss and a vertical pull force of over 7kg.
The following is a schematic diagram of the size of 20x10x5mm neodymium iron boron block magnet. Nickel plating is generally common, while black epoxy is suitable for more harsh environments.
Another possible shape is a ring shape, with an outer diameter of 20mm, an inner hole of 10mm, and a thickness of 5mm. A ring magnet will have a smaller pulling force than a block magnet of the same size because there is a hole in the center, reducing the contact area and dispersing the magnetic circuit. The estimated surface magnetic strength is around 3000 Gauss, and the pulling force is estimated to be over 4 pounds. The circular shape is more suitable for passing through some structural components, and the magnetic circuit is more uniform. It is often used for rotating sensors, motor magnetic rings, and other purposes.
The above is an introduction to the N52 grade magnetic force of 20x10x5mm. If you need to order high-performance neodymium magnetic blocks and rings, please feel free to contact the website customer service for a quotation.
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