How does a pot magnet work? Everything about force and design
A pot magnet is a more complex system than a standard disc or block magnet. It consists of a magnet recessed into a steel 'pot' or shell. This design offers major advantages regarding pull force and durability.
The physical principle: Concentrating the force
With a normal magnet, the magnetic field travels in an arc from the north pole to the south pole through the air. In a pot magnet, the back of the magnet is shielded by steel. This steel conducts the magnetism and redirects it back to the front. This brings both poles (north and south) to a single plane. The result? A massive concentration of force on the contact surface.
Advantages of the pot design
- Extreme pull force: In direct contact, a pot magnet is up to 50% stronger than a loose magnet of the same size.
- Robustness: Neodymium is brittle and breaks easily. The steel pot absorbs impacts and protects the core.
- Easy mounting: The steel casing allows for holes, threads, or hooks to be integrated without damaging the magnet.
Important for optimal results: Pot magnets are designed to stick directly to steel. As soon as there is a gap (such as a thick layer of paint or a wooden board), the pot magnet loses its strength faster than a regular magnet.
Looking for the right pot magnet? View all pot magnets and magnetic systems here.