Steel Cup · Threaded · Countersunk
A neodymium disc inside a steel cup, so nearly all flux leaves through one face.
A pot magnet roughly doubles the pull of the same magnet used bare, and the cup shields the sides from swarf and scratches.
Five mounting styles share that housing, from M4 to M12.
A neodymium pot magnet is a sintered NdFeB disc bonded into a mild steel cup, then plated as one unit.
The cup does two jobs. It shields the sides so the magnet does not grab swarf or scratch a painted panel, and it redirects flux that would otherwise leak sideways back into the working face.
That redirection is the whole point. A bare D32 disc and a D32 pot hold the same magnet, but the pot delivers close to twice the force on the same steel sheet.
The housing is the same. The way it attaches is what changes.
Pot magnet with external threaded stud, also called Neodymium cup magnet with male thread, is a type of magnet that features an external threaded hole or stud on its surface. In the various product and life areas, this threaded stud allows for easy and secure attachment to various objects or surfaces using nuts, bolts, or other threaded fasteners.
For pot magnet with internal threaded stud, the special threaded bush on the steel case of the Neodymium pot magnet with internal thread enables this threaded pot magnet to be mounted by steel rings, hooks or similar objects with a screw-in bar. It is also named as Neodymium shallow pot magnet with thread hole, Neodymium cup magnet with internal thread, and Neodymium round base magnet with female thread, etc.
Through hole pot magnet is a type of shallow pot magnet assembly that features a centrally located straight hole or bore along its axis. It is also commonly known as a pot magnet with a counterbore hole. The through hole allows for convenient mounting and fastening of the cup magnet to various surfaces or objects using screws or bolts.
Neodymium rectangular pot magnet, Neodymium channel magnet, or Neodymium rectangular channel mounting magnet utilizes a strong Neodymium block magnet with holes encased inside a steel channel to meet a versatile application in holding, mounting, securing or positioning.
Countersunk pot magnet is a type of magnet that has a specially designed hole or depression on one face, which allows it to be easily attached or mounted onto surfaces using screws or bolts. Neodymium countersunk pot magnet is also called Neodymium countersunk cup magnet, Neodymium countersunk round base magnet, Neodymium countersunk mounting magnet.
Pull measured on a 5 mm mild steel plate, perpendicular to the face, at 20 °C.
Force falls sharply with air gap. A 0.5 mm gap costs roughly 20 % of the rating, so paint, rust and grit all count against you. Use the magnetic pull force calculator for a specific stack.
Thread size and cup tolerance are quoted per order, not picked from a shelf list.
| Diameter | Thread options | Cup material | Plating | Operating temp |
|---|---|---|---|---|
| D16 / D20 | M4 | Mild steel | NiCuNi | 80 °C |
| D25 / D32 | M4, M5, M6 | Mild steel | NiCuNi | 80 °C |
| D36 / D42 | M6, M8 | Mild steel | NiCuNi / zinc | 80 °C |
| D48 / D60 | M8, M10 | Mild steel | NiCuNi / zinc | 80 °C |
| D66 | M10, M12 | Mild steel | NiCuNi / zinc | 80 °C |
For hot presses or engine bays, the standard pot is the wrong part. Move to a samarium cobalt assembly, which holds force past 300 °C.
The cup costs more per unit. It earns that back in handling and repeatability.
Most pot magnet manufacturers quote pull on a polished plate, so ask what thickness the figure assumes. Inside a motor rotor or a sensor housing, a bare neodymium magnet is the right call. Where a person places and removes it by hand every day, the pot wins.
Send diameter, thread and pull target. We confirm the closest housing or quote a new one.
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