The ferrite pot magnets in this group have a countersunk borehole (CSF) or an internal thread (ITF). They are made of ferrite and not neodymium like the otherwise identical countersunk pot magnets and pot magnets with internal thread. They have therefore a lower adhesive force and are larger. But they are cheaper than neodymium magnets and can be used outdoors as well.
The ferrite magnet systems in this group are especially suitable for store construction and warehousing.
Principle: The strong neodymium magnets are embedded in a steel pot. The steel pot increases the adhesive force of the magnet on direct contact with a thick iron surface. If there is no direct contact with the counterpart, or if the steel plate is thin, painted or rough, you can strain it much less.
Shear force: The indicated adhesive force was measured perpendicular to the surface to which the magnet should stick. It takes a lot less strength to move the magnet sideways. Therefore, you can strain a pot magnet much less if you use it on a wall as opposed to using it on the ceiling.
Rust: These magnets are rust-proof and can therefore be used outdoors and in wet surroundings. The pots around the magnets, however, may build up a rust film over time.
All further information regarding these products can be found in our FAQ about pot magnets.