External diameter
4 [mm] +0,1/-0,1
Height
4 [mm] +0,1/-0,1
Magnetizing direction along dimension
4 [mm]
Grade
N38
Magnet type
Neodymium
Maximal hoisting capacity
0,47 [kg]
Magnetic field in geometrical center of the magnetic pole surface
0,353 [T]
Coating
Nickel-plated (NiCuNi)
Maximum working temperature
≤ 80 [°C]
Magnetic moment
58,596 [nWb]x[m]
Weight
0,38 [g]
Performance parameters
Direction of magnetization along the height means that one circular surface of a magnet makes the N-pole, while the other – opposite – circular surface refers to the S-pole.
The magnetic force value given above, expressed in kilograms, was measured under ideal conditions. A thick iron plate with a smooth, unpainted surface was used. The force required to detach the magnet from the plate was perpendicular to the plate.
do not use in water
Sintered neodymium magnets are brittle (fragile). A neodymium magnet without housing could break after an impact with another strong magnet.
The maximum operating temperature of a magnet depends on the specific magnetic circuit in which the magnet is placed. Curie’s temperature is ~ 310°[C]. Temperature coefficient of remanence TK(Br): ≤ -0,12 %/°[C]. Temperature coefficient of coercivity TK(HcJ): ≤ -0,6 %/°[C].
The magnet parameter values presented here are the result of measurements taken on one specific magnet and are used to compare magnets available in the online shop. We recommend testing the magnet yourself under the expected operating conditions.
Magnetic properties of material grade N38
remanence Br |
~1,21 [T] |
coercivity HcB |
min. 876 [kA/m] |
coercivity HcJ |
min. 955 [kA/m] |
| The magnetic properties of the material are not identical for every magnet. The measurement results for different magnets will vary due to the inherent heterogeneity of the magnetic material and the measurement tolerances of the measuring device. |
Physical properties
Density |
~7,5 [g/cm3] |
Vickers’ hardness (HV) |
~600 [kg/mm2] |
Resistivity |
~144 [uOhm x cm] |
If you require neodymium magnets manufactured to strict specifications, please send us your enquiry along with your requirements.
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D4x4/N38 - small cylindrical magnet
This small cylindrical magnet was produced with N38 material. Of course, the strongest magnet will be made of the material with the highest magnetic properties and will also be the largest, but these materials with the highest magnetic properties are much more expensive than standard ones. A taller magnet will have a greater magnetic field range, the magnetic field lines will shoot straight up from the pole plane and there is a chance of attracting an iron object from a greater distance. On the other hand, a flat magnet will have a greater lifting capacity in practice and will be able to hold and lift objects with a larger surface area.