MW 15x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010027
GTIN/EAN: 5906301810261
Diameter Ø
15 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
13.25 g
Magnetization Direction
↑ axial
Load capacity
7.70 kg / 75.55 N
Magnetic Induction
495.60 mT / 4956 Gs
Coating
[NiCuNi] Nickel
4.51 ZŁ with VAT / pcs + price for transport
3.67 ZŁ net + 23% VAT / pcs
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Detailed specification - MW 15x10 / N38 - cylindrical magnet
Specification / characteristics - MW 15x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010027 |
| GTIN/EAN | 5906301810261 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 15 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 13.25 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 7.70 kg / 75.55 N |
| Magnetic Induction ~ ? | 495.60 mT / 4956 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 |
Physical simulation of the assembly - technical parameters
The following data represent the result of a physical analysis. Results were calculated on models for the class Nd2Fe14B. Real-world parameters might slightly differ. Use these calculations as a preliminary roadmap during assembly planning.
Table 1: Static force (force vs gap) - power drop
MW 15x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4954 Gs
495.4 mT
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
warning |
| 1 mm |
4303 Gs
430.3 mT
|
5.81 kg / 12.81 pounds
5810.9 g / 57.0 N
|
warning |
| 2 mm |
3660 Gs
366.0 mT
|
4.20 kg / 9.27 pounds
4203.8 g / 41.2 N
|
warning |
| 3 mm |
3068 Gs
306.8 mT
|
2.95 kg / 6.51 pounds
2953.2 g / 29.0 N
|
warning |
| 5 mm |
2106 Gs
210.6 mT
|
1.39 kg / 3.07 pounds
1392.2 g / 13.7 N
|
weak grip |
| 10 mm |
845 Gs
84.5 mT
|
0.22 kg / 0.49 pounds
224.2 g / 2.2 N
|
weak grip |
| 15 mm |
393 Gs
39.3 mT
|
0.05 kg / 0.11 pounds
48.5 g / 0.5 N
|
weak grip |
| 20 mm |
210 Gs
21.0 mT
|
0.01 kg / 0.03 pounds
13.8 g / 0.1 N
|
weak grip |
| 30 mm |
79 Gs
7.9 mT
|
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
weak grip |
| 50 mm |
21 Gs
2.1 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
weak grip |
Table 2: Shear load (vertical surface)
MW 15x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.54 kg / 3.40 pounds
1540.0 g / 15.1 N
|
| 1 mm | Stal (~0.2) |
1.16 kg / 2.56 pounds
1162.0 g / 11.4 N
|
| 2 mm | Stal (~0.2) |
0.84 kg / 1.85 pounds
840.0 g / 8.2 N
|
| 3 mm | Stal (~0.2) |
0.59 kg / 1.30 pounds
590.0 g / 5.8 N
|
| 5 mm | Stal (~0.2) |
0.28 kg / 0.61 pounds
278.0 g / 2.7 N
|
| 10 mm | Stal (~0.2) |
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
10.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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) - behavior on slippery surfaces
MW 15x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.31 kg / 5.09 pounds
2310.0 g / 22.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.54 kg / 3.40 pounds
1540.0 g / 15.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.77 kg / 1.70 pounds
770.0 g / 7.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
3.85 kg / 8.49 pounds
3850.0 g / 37.8 N
|
Table 4: Material efficiency (substrate influence) - power losses
MW 15x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.77 kg / 1.70 pounds
770.0 g / 7.6 N
|
| 1 mm |
|
1.93 kg / 4.24 pounds
1925.0 g / 18.9 N
|
| 2 mm |
|
3.85 kg / 8.49 pounds
3850.0 g / 37.8 N
|
| 3 mm |
|
5.78 kg / 12.73 pounds
5775.0 g / 56.7 N
|
| 5 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
| 10 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
| 11 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
| 12 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 15x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
OK |
| 40 °C | -2.2% |
7.53 kg / 16.60 pounds
7530.6 g / 73.9 N
|
OK |
| 60 °C | -4.4% |
7.36 kg / 16.23 pounds
7361.2 g / 72.2 N
|
OK |
| 80 °C | -6.6% |
7.19 kg / 15.86 pounds
7191.8 g / 70.6 N
|
|
| 100 °C | -28.8% |
5.48 kg / 12.09 pounds
5482.4 g / 53.8 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 15x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
26.73 kg / 58.93 pounds
5 797 Gs
|
4.01 kg / 8.84 pounds
4010 g / 39.3 N
|
N/A |
| 1 mm |
23.38 kg / 51.55 pounds
9 265 Gs
|
3.51 kg / 7.73 pounds
3507 g / 34.4 N
|
21.04 kg / 46.39 pounds
~0 Gs
|
| 2 mm |
20.17 kg / 44.48 pounds
8 606 Gs
|
3.03 kg / 6.67 pounds
3026 g / 29.7 N
|
18.16 kg / 40.03 pounds
~0 Gs
|
| 3 mm |
17.23 kg / 37.99 pounds
7 955 Gs
|
2.59 kg / 5.70 pounds
2585 g / 25.4 N
|
15.51 kg / 34.19 pounds
~0 Gs
|
| 5 mm |
12.27 kg / 27.05 pounds
6 712 Gs
|
1.84 kg / 4.06 pounds
1840 g / 18.1 N
|
11.04 kg / 24.34 pounds
~0 Gs
|
| 10 mm |
4.83 kg / 10.66 pounds
4 213 Gs
|
0.73 kg / 1.60 pounds
725 g / 7.1 N
|
4.35 kg / 9.59 pounds
~0 Gs
|
| 20 mm |
0.78 kg / 1.72 pounds
1 690 Gs
|
0.12 kg / 0.26 pounds
117 g / 1.1 N
|
0.70 kg / 1.54 pounds
~0 Gs
|
| 50 mm |
0.02 kg / 0.04 pounds
248 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.03 pounds
~0 Gs
|
| 60 mm |
0.01 kg / 0.01 pounds
158 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.01 pounds
107 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
75 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
55 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
41 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (implants) - warnings
MW 15x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 7.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 5.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 4.0 cm |
| Car key | 50 Gs (5.0 mT) | 4.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Dynamics (kinetic energy) - collision effects
MW 15x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.75 km/h
(6.88 m/s)
|
0.31 J | |
| 30 mm |
42.12 km/h
(11.70 m/s)
|
0.91 J | |
| 50 mm |
54.36 km/h
(15.10 m/s)
|
1.51 J | |
| 100 mm |
76.88 km/h
(21.36 m/s)
|
3.02 J |
Table 9: Corrosion resistance
MW 15x10 / 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 15x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 8 827 Mx | 88.3 µWb |
| Pc Coefficient | 0.71 | High (Stable) |
Table 11: Physics of underwater searching
MW 15x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 7.70 kg | Standard |
| Water (riverbed) |
8.82 kg
(+1.12 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical surface, the magnet holds only approx. 20-30% of its nominal pull.
2. Steel saturation
*Thin metal sheet (e.g. 0.5mm PC case) significantly limits the holding force.
3. Power loss vs temp
*For N38 material, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.71
The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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 |
View also products
Pros as well as cons of rare earth magnets.
Strengths
- They virtually do not lose power, because even after ten years the performance loss is only ~1% (based on calculations),
- Neodymium magnets are characterized by remarkably resistant to demagnetization caused by magnetic disturbances,
- By using a reflective coating of silver, the element acquires an proper look,
- Magnetic induction on the surface of the magnet remains extremely intense,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to the possibility of free shaping and customization to unique solutions, magnetic components can be modeled in a wide range of shapes and sizes, which expands the range of possible applications,
- Huge importance in electronics industry – they are utilized in hard drives, motor assemblies, diagnostic systems, and complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in small systems
Disadvantages
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
- Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- We suggest casing - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complex forms.
- Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which becomes key in the context of child health protection. Additionally, small components of these devices can be problematic in diagnostics medical when they are in the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Maximum lifting force for a neodymium magnet – what contributes to it?
- using a base made of high-permeability steel, acting as a circuit closing element
- possessing a thickness of min. 10 mm to ensure full flux closure
- with a plane cleaned and smooth
- with total lack of distance (no paint)
- during pulling in a direction vertical to the mounting surface
- at temperature approx. 20 degrees Celsius
Determinants of lifting force in real conditions
- Gap (betwixt the magnet and the plate), because even a microscopic clearance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Material type – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
- Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
- Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Lifting capacity was measured with the use of a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate reduces the load capacity.
Safe handling of NdFeB magnets
Data carriers
Intense magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.
Keep away from children
Always store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets connecting inside the body are very dangerous.
Mechanical processing
Powder produced during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Magnetic interference
A strong magnetic field disrupts the functioning of magnetometers in phones and GPS navigation. Maintain magnets near a smartphone to prevent breaking the sensors.
Beware of splinters
NdFeB magnets are ceramic materials, which means they are very brittle. Collision of two magnets will cause them shattering into shards.
Medical implants
Medical warning: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.
Nickel coating and allergies
Studies show that nickel (standard magnet coating) is a common allergen. If you have an allergy, avoid touching magnets with bare hands or select coated magnets.
Operating temperature
Keep cool. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
Bodily injuries
Protect your hands. Two large magnets will snap together immediately with a force of massive weight, crushing everything in their path. Be careful!
Immense force
Handle with care. Neodymium magnets act from a distance and connect with huge force, often faster than you can react.
