MW 10x4 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010010
GTIN/EAN: 5906301810094
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 ZŁ with VAT / pcs + price for transport
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Physical properties - MW 10x4 / N38 - cylindrical magnet
Specification / characteristics - MW 10x4 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010010 |
| GTIN/EAN | 5906301810094 |
| Production/Distribution | Dhit sp. z o.o. |
| 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
| 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
| 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 |
|
0.28 kg / 0.62 pounds
280.0 g / 2.7 N
|
| 1 mm |
|
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
| 2 mm |
|
1.40 kg / 3.09 pounds
1400.0 g / 13.7 N
|
| 3 mm |
|
2.10 kg / 4.63 pounds
2100.0 g / 20.6 N
|
| 5 mm |
|
2.80 kg / 6.17 pounds
2800.0 g / 27.5 N
|
| 10 mm |
|
2.80 kg / 6.17 pounds
2800.0 g / 27.5 N
|
| 11 mm |
|
2.80 kg / 6.17 pounds
2800.0 g / 27.5 N
|
| 12 mm |
|
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% |
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.
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 |
Other offers
Advantages as well as disadvantages of Nd2Fe14B magnets.
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
- 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?
- 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
- 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.
