These neodymium pot magnets with screw holes feature threaded holes that enable users to fasten them on walls, wood boards, etc for holding tools. NdFeB(neodymium) magnet is used for the strong force.
Pot magnet is named after its shape, and it is also called cup magnet . Which refers to a permanent magnet encased in a steel pot/cup, and the magnet is glued and magnetized together with the casing to create a holding force that is significantly stronger than an individual magnet. Based on this prototype there are so many extensions being made by adding different accessories, using different shape components. Some of them could look so different from the prototype pot magnet but as far as their core working principle does not change, we still call them "pot magnet".
Pot magnet with screw hole, as the name suggests, refers to a pot magnet that has a screw hole in the middle that enables users to fasten them on walls, wood boards or shelves etc. by screw for holding tools and other objects.
Pot magnets with screw holes are often used as magnetic bases and magnetic holders for large supermarket ceiling signs, as part of a light fitting for a magnetic down light, or to attach an exhibition display sign to a stand for marketing purposes, e.g. at a trade show.
We have these pot magnets with screw holes in several different diameters available from D25mm(160N), D32mm(330N), D40mm(500N), D50mm(800N) to D60mm(931N), D63mm(110N) and D74.6mm(1750N) to match for various screws from M4, M5, M8 to M10 etc.
Take M-RBNB40F(D40mm) for example, it can be accommodated to an M5x16 inner hexagon screw, and with a small through the hole on the working surface, it also works well with an M5x25 cross-recessed pan head screw (see the pictures below for better understanding). For M5x25 cross-recessed pan head screws, it is recommended to use a torque of 4Nm, while for M5x25 inner hexagon screws, it is recommended to use a torque of 2Nm on these bolts. Before installing on the machine, it is recommended to first clean thread parts with isopropanol and add Loctite 243 to threads.
Screw hole enables users to fasten these pot magnets onto, such as, a wooden object with ease. We understand that screw sizes may be different among different regions, so we offer screw sizes in both English measurement system and metric system.
Don't worry about the durability: we have chosen the most suitable glue, so the magnet won’t fall out as long as being used inappropriate environment. We are not just saying this but the glue is tested on its performance for every batch. Steel cup is finished with a coating which is proved by a test that they have the good corrosion-resistant capability. With most of our pot magnets, we put in filling material between magnet and steel cup to keep dust out so that the part is in a good state for long time use.
Most of our customers are located overseas which means our products are subject to long transportation before they arrive. For either air shipping or ocean shipping we are experienced in packing them well enough not to be damaged during their journey.