Neodymium Ring Magnet 8 x 2.5 x 4 mm N48
Neodymium (NdFeB) is among the strongest magnetic materials. The ring shape is practical because its central hole helps with mounting and alignment. Alongside high magnetic attraction, the surface coating helps improve durability. N48 indicates the magnetic grade. NdFeB grades commonly range from N35 to N52, with higher numbers generally indicating stronger magnets. The central hole simplifies mounting and positioning, making it useful for frames, holders and repeatable installations.
At Ø8/Ø2.5×4 mm, this magnet is useful for magnetic catches, DIY, organisation and lighter attachments to steel. (Ø8/Ø2.5×4 mm) Holding force depends strongly on the thickness and condition of the metal surface. It is greater on thick steel and weaker on thin sheet metal.
Warning: keep out of reach of children. Swallowing magnets poses a serious risk and requires immediate medical attention. Magnetic attraction is strong. Bring magnets together and separate them carefully to avoid pinching injuries and chipping. Keep them away from bank cards, sensitive electronics and medical devices such as pacemakers.
Neodymium Ring Magnet 8 x 2.5 x 4 mm N48
| Shape | Ring |
| Dimensions | 8 x 2,5 x 4 mm |
| Outer Diameter | 8 mm |
| Inner Diameter | 2,5 mm |
| Height | 4 mm |
| Material | NdFeB |
| Magnetic Grade | N48 |
| Coating | Ni-Cu-Ni |
| Dimensional Tolerance | ±0,1 mm |
| Approximate Weight | 1,39 g |
| Holding Force | 1,3 kg (12,75 N) |
| Maximum Operating Temperature | 80 °C |
| Magnetisation Direction | Axial |
| Remanence Br | 13,7 - 14,2 kGs |
| Coercivity bHc | ≥ 10,5 kOe |
| Intrinsic Coercivity iHc | ≥ 12 kOe |
| Maximum Energy Product BHmax | 45 - 48 MGOe |
