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
0.830 ZŁ net + 23% VAT / pcs
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Technical of the product - 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 |
Engineering analysis of the magnet - report
Presented data represent the outcome of a physical calculation. Values were calculated on algorithms for the class Nd2Fe14B. Operational performance might slightly differ. Please consider these calculations as a reference point for designers.
Table 1: Static force (pull vs gap) - interaction chart
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 LBS
2800.0 g / 27.5 N
|
warning |
| 1 mm |
3168 Gs
316.8 mT
|
1.88 kg / 4.14 LBS
1879.8 g / 18.4 N
|
safe |
| 2 mm |
2460 Gs
246.0 mT
|
1.13 kg / 2.50 LBS
1133.7 g / 11.1 N
|
safe |
| 3 mm |
1855 Gs
185.5 mT
|
0.64 kg / 1.42 LBS
644.6 g / 6.3 N
|
safe |
| 5 mm |
1036 Gs
103.6 mT
|
0.20 kg / 0.44 LBS
200.9 g / 2.0 N
|
safe |
| 10 mm |
293 Gs
29.3 mT
|
0.02 kg / 0.04 LBS
16.1 g / 0.2 N
|
safe |
| 15 mm |
114 Gs
11.4 mT
|
0.00 kg / 0.01 LBS
2.4 g / 0.0 N
|
safe |
| 20 mm |
55 Gs
5.5 mT
|
0.00 kg / 0.00 LBS
0.6 g / 0.0 N
|
safe |
| 30 mm |
18 Gs
1.8 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
safe |
| 50 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Slippage load (wall)
MW 10x4 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
|
| 1 mm | Stal (~0.2) |
0.38 kg / 0.83 LBS
376.0 g / 3.7 N
|
| 2 mm | Stal (~0.2) |
0.23 kg / 0.50 LBS
226.0 g / 2.2 N
|
| 3 mm | Stal (~0.2) |
0.13 kg / 0.28 LBS
128.0 g / 1.3 N
|
| 5 mm | Stal (~0.2) |
0.04 kg / 0.09 LBS
40.0 g / 0.4 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
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 LBS
840.0 g / 8.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.28 kg / 0.62 LBS
280.0 g / 2.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.40 kg / 3.09 LBS
1400.0 g / 13.7 N
|
Table 4: Steel thickness (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 LBS
280.0 g / 2.7 N
|
| 1 mm |
|
0.70 kg / 1.54 LBS
700.0 g / 6.9 N
|
| 2 mm |
|
1.40 kg / 3.09 LBS
1400.0 g / 13.7 N
|
| 3 mm |
|
2.10 kg / 4.63 LBS
2100.0 g / 20.6 N
|
| 5 mm |
|
2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
|
| 10 mm |
|
2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
|
| 11 mm |
|
2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
|
| 12 mm |
|
2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
|
Table 5: Thermal resistance (stability) - 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 LBS
2800.0 g / 27.5 N
|
OK |
| 40 °C | -2.2% |
2.74 kg / 6.04 LBS
2738.4 g / 26.9 N
|
OK |
| 60 °C | -4.4% |
2.68 kg / 5.90 LBS
2676.8 g / 26.3 N
|
|
| 80 °C | -6.6% |
2.62 kg / 5.77 LBS
2615.2 g / 25.7 N
|
|
| 100 °C | -28.8% |
1.99 kg / 4.40 LBS
1993.6 g / 19.6 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
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 LBS
5 247 Gs
|
1.09 kg / 2.39 LBS
1086 g / 10.7 N
|
N/A |
| 1 mm |
6.04 kg / 13.31 LBS
7 061 Gs
|
0.91 kg / 2.00 LBS
905 g / 8.9 N
|
5.43 kg / 11.98 LBS
~0 Gs
|
| 2 mm |
4.86 kg / 10.71 LBS
6 336 Gs
|
0.73 kg / 1.61 LBS
729 g / 7.2 N
|
4.37 kg / 9.64 LBS
~0 Gs
|
| 3 mm |
3.81 kg / 8.41 LBS
5 612 Gs
|
0.57 kg / 1.26 LBS
572 g / 5.6 N
|
3.43 kg / 7.56 LBS
~0 Gs
|
| 5 mm |
2.22 kg / 4.90 LBS
4 283 Gs
|
0.33 kg / 0.73 LBS
333 g / 3.3 N
|
2.00 kg / 4.41 LBS
~0 Gs
|
| 10 mm |
0.52 kg / 1.15 LBS
2 071 Gs
|
0.08 kg / 0.17 LBS
78 g / 0.8 N
|
0.47 kg / 1.03 LBS
~0 Gs
|
| 20 mm |
0.04 kg / 0.09 LBS
587 Gs
|
0.01 kg / 0.01 LBS
6 g / 0.1 N
|
0.04 kg / 0.08 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
61 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 LBS
37 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 LBS
24 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 LBS
16 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 LBS
12 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 LBS
9 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (implants) - precautionary measures
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 |
| Mobile device | 40 Gs (4.0 mT) | 2.5 cm |
| Car key | 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: Dynamics (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: Anti-corrosion coating durability
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: Construction 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: Submerged application
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. Wall mount (shear)
*Warning: On a vertical wall, the magnet holds only a fraction of its perpendicular strength.
2. Steel saturation
*Thin metal sheet (e.g. computer case) severely limits the holding force.
3. Power loss vs temp
*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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Advantages and disadvantages of Nd2Fe14B magnets.
Benefits
- They retain full power for nearly 10 years – the loss is just ~1% (in theory),
- Magnets very well resist against demagnetization caused by foreign field sources,
- By using a lustrous layer of nickel, the element gains an modern look,
- Magnetic induction on the top side of the magnet remains maximum,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Possibility of exact forming and adapting to precise applications,
- Versatile presence in modern technologies – they are used in mass storage devices, drive modules, advanced medical instruments, as well as technologically advanced constructions.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Disadvantages
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength 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
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Limited possibility of making threads in the magnet and complex forms - preferred is cover - magnet mounting.
- Health risk to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that small elements of these devices can complicate diagnosis medical in case of swallowing.
- With large orders the cost of neodymium magnets can be a barrier,
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what affects it?
- on a base made of structural steel, optimally conducting the magnetic flux
- with a thickness no less than 10 mm
- characterized by smoothness
- with direct contact (no impurities)
- for force acting at a right angle (in the magnet axis)
- in stable room temperature
What influences lifting capacity in practice
- Distance (betwixt the magnet and the metal), as even a very small clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, corrosion or dirt).
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Steel type – low-carbon steel gives the best results. Higher carbon content lower magnetic permeability and lifting capacity.
- Surface condition – ground elements ensure maximum contact, which increases force. Uneven metal reduce efficiency.
- Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).
Lifting capacity was measured by applying a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate reduces the load capacity.
Safe handling of neodymium magnets
Magnet fragility
NdFeB magnets are ceramic materials, meaning they are fragile like glass. Impact of two magnets will cause them shattering into shards.
Hand protection
Watch your fingers. Two large magnets will join instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!
Heat sensitivity
Avoid heat. NdFeB magnets are sensitive to heat. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
This is not a toy
Only for adults. Small elements pose a choking risk, causing intestinal necrosis. Keep away from children and animals.
Handling rules
Use magnets with awareness. Their huge power can shock even professionals. Be vigilant and respect their force.
Do not drill into magnets
Dust generated during machining of magnets is flammable. Avoid drilling into magnets unless you are an expert.
Cards and drives
Do not bring magnets close to a purse, computer, or screen. The magnetic field can destroy these devices and erase data from cards.
Warning for heart patients
Warning for patients: Powerful magnets affect electronics. Maintain at least 30 cm distance or request help to handle the magnets.
Magnetic interference
GPS units and mobile phones are extremely susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can permanently damage the sensors in your phone.
Nickel allergy
Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. If you have an allergy, prevent touching magnets with bare hands or select encased magnets.
