FAQ - Frequently Asked Questions
What are special features of a pot magnet?
Important features of pot magnets
Principle:A pot magnet is 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 won’t be able to put as much strain on it.
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 won’t be able to put as much strain on a pot magnet if you use it on a wall as opposed to using it on the ceiling. Please note our FAQ regarding shear force. By using appropriate rubber caps on the bottom side of pot magnets, you can enhance the adhesive force in shear force considerably. Or you can use pot magnets with rubber coating: They adhere much more in shear force.
Rust:Neodymium pot magnets are not rust-proof and therefore intended for dry indoor use. Our ferrite pot magnets, on the other hand, are rust-proof.
Maximum working temperature:Most pot magnets can be heated to a temperature of up to 80°C without losing their magnetisation (ferrite magnets and certain CSN-types even higher). The adhesive that connects the magnet and the steel pot may become brittle at continuous heating to this temperature. Hence, it is recommended to use pot magnets only at room temperature.
Magnetic flux lines of raw magnets vs. pot magnets
Raw magnetWith a "naked" magnet (raw magnet) the field lines move freely through the air. They surround the magnet widely in all directions and can therefore attract a counterpart from a distance of a few millimetres.
Pot magnetThe field lines move even easier through iron than through the air. The steel pot of a pot magnet directs the magnetic field lines downward to the contact surface. This causes the magnetic force to be bundled at the contact surface (see picture below).
Why can't I put two pot magnets flush on top of each other>
OffsetTo protect the magnet and ensure maximum adhesive force, the magnet must not protrude from the pot. In practice the magnet is lightly recessed in the pot, which varies from magnet to magnet, but the adhesive force indicated on the web shop is guaranteed.
Suitable counterparts to pot magnets
Screw-on metal discsWe recommend inexpensive and practical countersunk metal discs as an ideal surface for pot magnets. They can easily be screwed onto non-magnetic surfaces with a countersunk head screw. They are also suitable counterparts for disc magnets (available with our without borehole).
Glue-on metal discsWe also recommend self-adhesive metal discs as counterparts to pot magnets (available untreated or with white coating). They are only suitable for pot magnets and disc magnets with a diameter of up to 20 mm.
Combination of pot magnet with raw magnet
Pot magnet application areas
- Booth construction, store construction, interior fittings
- Bath and kitchen installations
- Cabinetry, furniture construction
- Metal construction
- Machine and plant construction
- Lighting industry