MW 14x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010391
GTIN/EAN: 5906301811084
Diameter Ø
14 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
11.55 g
Magnetization Direction
↑ axial
Load capacity
6.71 kg / 65.83 N
Magnetic Induction
507.48 mT / 5075 Gs
Coating
[NiCuNi] Nickel
6.84 ZŁ with VAT / pcs + price for transport
5.56 ZŁ net + 23% VAT / pcs
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Technical specification of the product - MW 14x10 / N38 - cylindrical magnet
Specification / characteristics - MW 14x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010391 |
| GTIN/EAN | 5906301811084 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 14 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 11.55 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 6.71 kg / 65.83 N |
| Magnetic Induction ~ ? | 507.48 mT / 5075 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 magnet - report
Presented information are the result of a mathematical analysis. Results were calculated on models for the class Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Treat these data as a reference point when designing systems.
Table 1: Static force (pull vs gap) - interaction chart
MW 14x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5072 Gs
507.2 mT
|
6.71 kg / 14.79 pounds
6710.0 g / 65.8 N
|
warning |
| 1 mm |
4354 Gs
435.4 mT
|
4.94 kg / 10.90 pounds
4944.4 g / 48.5 N
|
warning |
| 2 mm |
3652 Gs
365.2 mT
|
3.48 kg / 7.67 pounds
3479.0 g / 34.1 N
|
warning |
| 3 mm |
3017 Gs
301.7 mT
|
2.37 kg / 5.23 pounds
2373.5 g / 23.3 N
|
warning |
| 5 mm |
2015 Gs
201.5 mT
|
1.06 kg / 2.33 pounds
1058.7 g / 10.4 N
|
low risk |
| 10 mm |
773 Gs
77.3 mT
|
0.16 kg / 0.34 pounds
155.7 g / 1.5 N
|
low risk |
| 15 mm |
352 Gs
35.2 mT
|
0.03 kg / 0.07 pounds
32.3 g / 0.3 N
|
low risk |
| 20 mm |
186 Gs
18.6 mT
|
0.01 kg / 0.02 pounds
9.0 g / 0.1 N
|
low risk |
| 30 mm |
69 Gs
6.9 mT
|
0.00 kg / 0.00 pounds
1.3 g / 0.0 N
|
low risk |
| 50 mm |
18 Gs
1.8 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
low risk |
Table 2: Vertical force (wall)
MW 14x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.34 kg / 2.96 pounds
1342.0 g / 13.2 N
|
| 1 mm | Stal (~0.2) |
0.99 kg / 2.18 pounds
988.0 g / 9.7 N
|
| 2 mm | Stal (~0.2) |
0.70 kg / 1.53 pounds
696.0 g / 6.8 N
|
| 3 mm | Stal (~0.2) |
0.47 kg / 1.04 pounds
474.0 g / 4.6 N
|
| 5 mm | Stal (~0.2) |
0.21 kg / 0.47 pounds
212.0 g / 2.1 N
|
| 10 mm | Stal (~0.2) |
0.03 kg / 0.07 pounds
32.0 g / 0.3 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.01 pounds
6.0 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: Vertical assembly (sliding) - behavior on slippery surfaces
MW 14x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.01 kg / 4.44 pounds
2013.0 g / 19.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.34 kg / 2.96 pounds
1342.0 g / 13.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.67 kg / 1.48 pounds
671.0 g / 6.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
3.36 kg / 7.40 pounds
3355.0 g / 32.9 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MW 14x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.67 kg / 1.48 pounds
671.0 g / 6.6 N
|
| 1 mm |
|
1.68 kg / 3.70 pounds
1677.5 g / 16.5 N
|
| 2 mm |
|
3.36 kg / 7.40 pounds
3355.0 g / 32.9 N
|
| 3 mm |
|
5.03 kg / 11.09 pounds
5032.5 g / 49.4 N
|
| 5 mm |
|
6.71 kg / 14.79 pounds
6710.0 g / 65.8 N
|
| 10 mm |
|
6.71 kg / 14.79 pounds
6710.0 g / 65.8 N
|
| 11 mm |
|
6.71 kg / 14.79 pounds
6710.0 g / 65.8 N
|
| 12 mm |
|
6.71 kg / 14.79 pounds
6710.0 g / 65.8 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 14x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
6.71 kg / 14.79 pounds
6710.0 g / 65.8 N
|
OK |
| 40 °C | -2.2% |
6.56 kg / 14.47 pounds
6562.4 g / 64.4 N
|
OK |
| 60 °C | -4.4% |
6.41 kg / 14.14 pounds
6414.8 g / 62.9 N
|
OK |
| 80 °C | -6.6% |
6.27 kg / 13.82 pounds
6267.1 g / 61.5 N
|
|
| 100 °C | -28.8% |
4.78 kg / 10.53 pounds
4777.5 g / 46.9 N
|
Table 6: Two magnets (repulsion) - forces in the system
MW 14x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
24.41 kg / 53.82 pounds
5 843 Gs
|
3.66 kg / 8.07 pounds
3662 g / 35.9 N
|
N/A |
| 1 mm |
21.12 kg / 46.55 pounds
9 434 Gs
|
3.17 kg / 6.98 pounds
3167 g / 31.1 N
|
19.00 kg / 41.90 pounds
~0 Gs
|
| 2 mm |
17.99 kg / 39.66 pounds
8 708 Gs
|
2.70 kg / 5.95 pounds
2699 g / 26.5 N
|
16.19 kg / 35.70 pounds
~0 Gs
|
| 3 mm |
15.16 kg / 33.43 pounds
7 994 Gs
|
2.27 kg / 5.01 pounds
2274 g / 22.3 N
|
13.65 kg / 30.08 pounds
~0 Gs
|
| 5 mm |
10.49 kg / 23.12 pounds
6 649 Gs
|
1.57 kg / 3.47 pounds
1573 g / 15.4 N
|
9.44 kg / 20.81 pounds
~0 Gs
|
| 10 mm |
3.85 kg / 8.49 pounds
4 029 Gs
|
0.58 kg / 1.27 pounds
578 g / 5.7 N
|
3.47 kg / 7.64 pounds
~0 Gs
|
| 20 mm |
0.57 kg / 1.25 pounds
1 545 Gs
|
0.08 kg / 0.19 pounds
85 g / 0.8 N
|
0.51 kg / 1.12 pounds
~0 Gs
|
| 50 mm |
0.01 kg / 0.02 pounds
218 Gs
|
0.00 kg / 0.00 pounds
2 g / 0.0 N
|
0.01 kg / 0.02 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.01 pounds
139 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 / 0.00 pounds
93 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
66 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
48 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
36 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 14x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 5.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 4.0 cm |
| Remote | 50 Gs (5.0 mT) | 3.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Impact energy (cracking risk) - warning
MW 14x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.66 km/h
(6.85 m/s)
|
0.27 J | |
| 30 mm |
42.11 km/h
(11.70 m/s)
|
0.79 J | |
| 50 mm |
54.36 km/h
(15.10 m/s)
|
1.32 J | |
| 100 mm |
76.87 km/h
(21.35 m/s)
|
2.63 J |
Table 9: Corrosion resistance
MW 14x10 / 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 (Flux)
MW 14x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 7 886 Mx | 78.9 µWb |
| Pc Coefficient | 0.74 | High (Stable) |
Table 11: Physics of underwater searching
MW 14x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 6.71 kg | Standard |
| Water (riverbed) |
7.68 kg
(+0.97 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Note: On a vertical surface, the magnet retains merely approx. 20-30% of its perpendicular strength.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) significantly weakens the holding force.
3. Power loss vs temp
*For standard magnets, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.74
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.
Material specification
| 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 proposals
Pros and cons of Nd2Fe14B magnets.
Benefits
- They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (based on calculations),
- They maintain their magnetic properties even under strong external field,
- A magnet with a shiny gold surface has better aesthetics,
- Magnetic induction on the top side of the magnet is exceptional,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Possibility of accurate modeling and adapting to atypical conditions,
- Key role in modern industrial fields – they are utilized in mass storage devices, drive modules, diagnostic systems, and multitasking production systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Weaknesses
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. 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 corrode. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Limited ability of making nuts in the magnet and complex shapes - preferred is cover - magnet mounting.
- Health risk resulting from small fragments of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, tiny parts of these products can disrupt the diagnostic process medical when they are in the body.
- Due to expensive raw materials, their price is relatively high,
Holding force characteristics
Maximum magnetic pulling force – what it depends on?
- on a plate made of structural steel, effectively closing the magnetic flux
- with a thickness of at least 10 mm
- with an ideally smooth contact surface
- under conditions of ideal adhesion (metal-to-metal)
- under perpendicular application of breakaway force (90-degree angle)
- at standard ambient temperature
Determinants of practical lifting force of a magnet
- Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds much less (typically approx. 20-30% of nominal force).
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
- Chemical composition of the base – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and lifting capacity.
- Smoothness – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
- Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.
H&S for magnets
Avoid contact if allergic
Studies show that the nickel plating (standard magnet coating) is a potent allergen. For allergy sufferers, prevent touching magnets with bare hands or choose coated magnets.
GPS Danger
Be aware: neodymium magnets generate a field that disrupts precision electronics. Keep a separation from your mobile, device, and navigation systems.
Heat warning
Control the heat. Heating the magnet above 80 degrees Celsius will destroy its magnetic structure and strength.
Finger safety
Risk of injury: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Use thick gloves.
Eye protection
Protect your eyes. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Wear goggles.
No play value
These products are not intended for children. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which poses a direct threat to life and requires immediate surgery.
Protect data
Avoid bringing magnets close to a purse, computer, or screen. The magnetism can permanently damage these devices and wipe information from cards.
Flammability
Machining of neodymium magnets poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Implant safety
For implant holders: Strong magnetic fields affect electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.
Respect the power
Exercise caution. Neodymium magnets act from a distance and connect with huge force, often faster than you can react.
