While "strongest" can be subjective depending on the application, disc magnets are generally considered among the most powerful permanent magnets.
Here's why:
- Large Pole Area: Disc magnets have a wide, flat surface which translates to a large pole area. This increased surface area allows for a stronger magnetic field to be generated and maintained.
- Industrial Applications: Disc magnets are commonly used in industrial applications like lifting heavy objects (e.g., cars) and in powerful electromagnets because of their strength and efficiency.
- Material Considerations: The overall strength of a magnet also depends on the material it's made from. Neodymium magnets, regardless of shape, are typically much stronger than ceramic or alnico magnets. However, disc shapes made from neodymium are particularly potent due to the large pole area leveraging the strong material.
Therefore, a disc-shaped neodymium magnet will often be the strongest option for many applications where a high holding force is needed. Other shapes might be more suitable for specific magnetic circuit designs, but for raw holding power, discs are excellent.
