Countersunk pot magnet, Ø25 mm. - Ferrite

Pot magnet with ferrite core and screw hole for countersunk screw.

The magnet has a strength of approx. 2.2 kg.

Although ferrite is nowhere near as strong as neodymium (this is almost 90% weaker than Ø25 neodymium magnet), there are still some clear advantages to choosing a ferrite pot magnet: 

• Can be used outdoors

• Cheap alternative to neodymium magnet

Ferrite magnets are often used outdoors because they can withstand direct sunlight and they do not rust despite wind and weather. Be aware that the steel pot can get a thin layer of rust - this does not affect the magnetism, however.

SPECIFICATIONS
Diameter: 2.5 cm.
Height: 7 mm.
Screw hole: ø 5.5 mm. (M5)
Strength: approx. 2,200 g.
Magnetism: Y30BH
Steel pot: Q235
Max. temperature: 50°C

The steel pot has 2 functions: reinforces the magnetism and holds the magnet in place so that it is more resistant to blows.

The strength of these pot magnets with ferrite is measured directly on a strong, magnetic steel plate. The strength weakens the further the magnet is from the magnetic surface. 

Note that magnets always have the strongest pull on a horizontal surface, as the magnet can slide on a vertical surface. A vertical pull on the magnet demands more strength from the magnet as it is not a direct pull.

Please contact us for strength requirement calculations if you need a magnet that is further away from the magnetic surface or it needs to adhere vertically - both require a lot of the magnet and quickly weaken the magnet with 75% or more.

Ferrite magnets are not suitable for glass boards.