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MW 10x4 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010010

GTIN/EAN: 5906301810094

5.00

Diameter Ø

10 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

2.36 g

Magnetization Direction

↑ axial

Load capacity

2.80 kg / 27.42 N

Magnetic Induction

386.91 mT / 3869 Gs

Coating

[NiCuNi] Nickel

1.021 with VAT / pcs + price for transport

0.830 ZŁ net + 23% VAT / pcs

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Physical properties - MW 10x4 / N38 - cylindrical magnet

Specification / characteristics - MW 10x4 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010010
GTIN/EAN 5906301810094
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 10 mm [±0,1 mm]
Height 4 mm [±0,1 mm]
Weight 2.36 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.80 kg / 27.42 N
Magnetic Induction ~ ? 386.91 mT / 3869 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 10x4 / N38 - cylindrical magnet
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 312 - 380 °C
Curie Temperature TF 593 - 716 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Technical analysis of the magnet - report

These data constitute the result of a physical calculation. Results rely on models for the material Nd2Fe14B. Actual parameters might slightly deviate from the simulation results. Use these calculations as a reference point during assembly planning.

Table 1: Static force (force vs gap) - characteristics
MW 10x4 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3867 Gs
386.7 mT
2.80 kg / 6.17 pounds
2800.0 g / 27.5 N
warning
1 mm 3168 Gs
316.8 mT
1.88 kg / 4.14 pounds
1879.8 g / 18.4 N
low risk
2 mm 2460 Gs
246.0 mT
1.13 kg / 2.50 pounds
1133.7 g / 11.1 N
low risk
3 mm 1855 Gs
185.5 mT
0.64 kg / 1.42 pounds
644.6 g / 6.3 N
low risk
5 mm 1036 Gs
103.6 mT
0.20 kg / 0.44 pounds
200.9 g / 2.0 N
low risk
10 mm 293 Gs
29.3 mT
0.02 kg / 0.04 pounds
16.1 g / 0.2 N
low risk
15 mm 114 Gs
11.4 mT
0.00 kg / 0.01 pounds
2.4 g / 0.0 N
low risk
20 mm 55 Gs
5.5 mT
0.00 kg / 0.00 pounds
0.6 g / 0.0 N
low risk
30 mm 18 Gs
1.8 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
low risk
50 mm 4 Gs
0.4 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk

Table 2: Sliding force (wall)
MW 10x4 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.56 kg / 1.23 pounds
560.0 g / 5.5 N
1 mm Stal (~0.2) 0.38 kg / 0.83 pounds
376.0 g / 3.7 N
2 mm Stal (~0.2) 0.23 kg / 0.50 pounds
226.0 g / 2.2 N
3 mm Stal (~0.2) 0.13 kg / 0.28 pounds
128.0 g / 1.3 N
5 mm Stal (~0.2) 0.04 kg / 0.09 pounds
40.0 g / 0.4 N
10 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - vertical pull
MW 10x4 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.84 kg / 1.85 pounds
840.0 g / 8.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.56 kg / 1.23 pounds
560.0 g / 5.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.28 kg / 0.62 pounds
280.0 g / 2.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.40 kg / 3.09 pounds
1400.0 g / 13.7 N

Table 4: Material efficiency (saturation) - power losses
MW 10x4 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.28 kg / 0.62 pounds
280.0 g / 2.7 N
1 mm
25%
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
2 mm
50%
1.40 kg / 3.09 pounds
1400.0 g / 13.7 N
3 mm
75%
2.10 kg / 4.63 pounds
2100.0 g / 20.6 N
5 mm
100%
2.80 kg / 6.17 pounds
2800.0 g / 27.5 N
10 mm
100%
2.80 kg / 6.17 pounds
2800.0 g / 27.5 N
11 mm
100%
2.80 kg / 6.17 pounds
2800.0 g / 27.5 N
12 mm
100%
2.80 kg / 6.17 pounds
2800.0 g / 27.5 N

Table 5: Thermal resistance (material behavior) - thermal limit
MW 10x4 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.80 kg / 6.17 pounds
2800.0 g / 27.5 N
OK
40 °C -2.2% 2.74 kg / 6.04 pounds
2738.4 g / 26.9 N
OK
60 °C -4.4% 2.68 kg / 5.90 pounds
2676.8 g / 26.3 N
80 °C -6.6% 2.62 kg / 5.77 pounds
2615.2 g / 25.7 N
100 °C -28.8% 1.99 kg / 4.40 pounds
1993.6 g / 19.6 N

Table 6: Two magnets (attraction) - field range
MW 10x4 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 7.24 kg / 15.96 pounds
5 247 Gs
1.09 kg / 2.39 pounds
1086 g / 10.7 N
N/A
1 mm 6.04 kg / 13.31 pounds
7 061 Gs
0.91 kg / 2.00 pounds
905 g / 8.9 N
5.43 kg / 11.98 pounds
~0 Gs
2 mm 4.86 kg / 10.71 pounds
6 336 Gs
0.73 kg / 1.61 pounds
729 g / 7.2 N
4.37 kg / 9.64 pounds
~0 Gs
3 mm 3.81 kg / 8.41 pounds
5 612 Gs
0.57 kg / 1.26 pounds
572 g / 5.6 N
3.43 kg / 7.56 pounds
~0 Gs
5 mm 2.22 kg / 4.90 pounds
4 283 Gs
0.33 kg / 0.73 pounds
333 g / 3.3 N
2.00 kg / 4.41 pounds
~0 Gs
10 mm 0.52 kg / 1.15 pounds
2 071 Gs
0.08 kg / 0.17 pounds
78 g / 0.8 N
0.47 kg / 1.03 pounds
~0 Gs
20 mm 0.04 kg / 0.09 pounds
587 Gs
0.01 kg / 0.01 pounds
6 g / 0.1 N
0.04 kg / 0.08 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
61 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
37 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
24 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
16 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
12 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
9 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Safety (HSE) (electronics) - warnings
MW 10x4 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.0 cm
Hearing aid 10 Gs (1.0 mT) 4.0 cm
Mechanical watch 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Remote 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Impact energy (cracking risk) - warning
MW 10x4 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 34.86 km/h
(9.68 m/s)
0.11 J
30 mm 60.17 km/h
(16.71 m/s)
0.33 J
50 mm 77.68 km/h
(21.58 m/s)
0.55 J
100 mm 109.85 km/h
(30.51 m/s)
1.10 J

Table 9: Corrosion resistance
MW 10x4 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)

Table 10: Electrical data (Pc)
MW 10x4 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 142 Mx 31.4 µWb
Pc Coefficient 0.50 Low (Flat)

Table 11: Underwater work (magnet fishing)
MW 10x4 / N38

Environment Effective steel pull Effect
Air (land) 2.80 kg Standard
Water (riverbed) 3.21 kg
(+0.41 kg buoyancy gain)
+14.5%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Shear force

*Caution: On a vertical surface, the magnet retains just a fraction of its perpendicular strength.

2. Steel saturation

*Thin steel (e.g. computer case) drastically reduces the holding force.

3. Thermal stability

*For N38 grade, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.50

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Engineering data and GPSR
Elemental analysis
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Ecology and recycling (GPSR)
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010010-2026
Measurement Calculator
Magnet pull force

Magnetic Field

Other offers

The offered product is a very strong cylinder magnet, made from advanced NdFeB material, which, at dimensions of Ø10x4 mm, guarantees optimal power. The MW 10x4 / N38 component is characterized by an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 2.80 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 27.42 N with a weight of only 2.36 g, this rod is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets N38 are suitable for the majority of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø10x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
This model is characterized by dimensions Ø10x4 mm, which, at a weight of 2.36 g, makes it an element with impressive magnetic energy density. The key parameter here is the holding force amounting to approximately 2.80 kg (force ~27.42 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 4 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Advantages

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • Their strength is durable, and after approximately ten years it drops only by ~1% (theoretically),
  • Neodymium magnets remain extremely resistant to magnetic field loss caused by external magnetic fields,
  • In other words, due to the shiny finish of silver, the element is aesthetically pleasing,
  • Neodymium magnets ensure maximum magnetic induction on a small surface, which increases force concentration,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Considering the option of free shaping and adaptation to custom needs, NdFeB magnets can be produced in a variety of shapes and sizes, which amplifies use scope,
  • Fundamental importance in future technologies – they are commonly used in magnetic memories, motor assemblies, medical devices, as well as complex engineering applications.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Limitations

Problematic aspects of neodymium magnets: tips and applications.
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Limited possibility of creating nuts in the magnet and complicated forms - preferred is cover - mounting mechanism.
  • Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that small components of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what affects it?

Information about lifting capacity is the result of a measurement for optimal configuration, including:
  • using a plate made of mild steel, functioning as a magnetic yoke
  • whose thickness equals approx. 10 mm
  • with an polished contact surface
  • under conditions of gap-free contact (surface-to-surface)
  • during detachment in a direction vertical to the plane
  • in stable room temperature

Magnet lifting force in use – key factors

In practice, the real power is determined by many variables, listed from most significant:
  • Gap (between the magnet and the plate), as even a tiny clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, rust or debris).
  • Angle of force application – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Steel grade – the best choice is high-permeability steel. Cast iron may have worse magnetic properties.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
  • Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.

H&S for magnets
Metal Allergy

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation appears, cease handling magnets and wear gloves.

Handling rules

Exercise caution. Rare earth magnets act from a distance and snap with massive power, often quicker than you can react.

Warning for heart patients

Warning for patients: Powerful magnets disrupt medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Demagnetization risk

Control the heat. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

Protect data

Intense magnetic fields can erase data on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

Shattering risk

Neodymium magnets are sintered ceramics, meaning they are very brittle. Impact of two magnets leads to them cracking into small pieces.

Flammability

Dust generated during grinding of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Danger to the youngest

Always store magnets away from children. Choking hazard is high, and the effects of magnets clamping inside the body are life-threatening.

Hand protection

Danger of trauma: The pulling power is so great that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.

Impact on smartphones

Remember: neodymium magnets generate a field that disrupts sensitive sensors. Keep a separation from your phone, tablet, and navigation systems.

Important! Need more info? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98