Neodymium pot magnet with cylindrical countersink
Screw-on holding power: These countersunk pot magnets have a strong neodymium magnetic core and are very robust. They are usually mounted using a cylinder head screw.
If you want to mount the magnet with a countersunk head screw, we recommend using identical pot magnets with conical countersunk holes.
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From 1€6.28
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Pot magnets with cylindrical countersink
These strong permanent magnets consist of a neodymium ring magnet that is built into a steel cup. This protective steel jacket around the magnet has two advantages: it shields the magnet and guides the field lines to the open holding surface. This increases the holding force, which is why these magnet systems are considerably stronger than raw magnets of the same size.
Since the field lines are bundled by the steel pot, the magnetic field of the countersunk pot magnets with a cylindrical borehole is very strong but also quite flat. This means that the magnet must be in direct and full contact with the surface. This is the only way it can develop its full holding force. Even a small air gap of 1 mm between the pot magnet and the holding surface will reduce the adhesive force. An air gap can also be caused by paint, rust or uneven surfaces.
Our countersunk pot magnets are resistant to temperatures up to 80°C, axially magnetized and have a neodymium magnetic core. Alternatively, we also have affordable ferrite magnets with cylinder boreholes in our range.
Can a pot magnet with a borehole be used outside?
Although both the magnet and the steel pot are coated and corrosion-resistant, this coating can chip over time. Rust will quickly form at these points when used outdoors. This is not a big problem for the steel cup, but it does affect the built-in neodymium magnet.
Pot magnets with a cylinder bore are therefore not suitable for such applications.
For outdoor or humid areas, we recommend our rubberized magnets. These also have a strong neodymium magnet core and a cylinder bore.