MW 12x6 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010021
GTIN/EAN: 5906301810209
Diameter Ø
12 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
5.09 g
Magnetization Direction
↑ axial
Load capacity
4.60 kg / 45.09 N
Magnetic Induction
437.99 mT / 4380 Gs
Coating
[NiCuNi] Nickel
1.882 ZŁ with VAT / pcs + price for transport
1.530 ZŁ net + 23% VAT / pcs
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Technical details - MW 12x6 / N38 - cylindrical magnet
Specification / characteristics - MW 12x6 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010021 |
| GTIN/EAN | 5906301810209 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 5.09 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 4.60 kg / 45.09 N |
| Magnetic Induction ~ ? | 437.99 mT / 4380 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 simulation of the assembly - report
The following data constitute the result of a physical analysis. Results were calculated on algorithms for the class Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Treat these data as a supplementary guide when designing systems.
Table 1: Static force (force vs distance) - power drop
MW 12x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4377 Gs
437.7 mT
|
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
warning |
| 1 mm |
3688 Gs
368.8 mT
|
3.27 kg / 7.20 pounds
3265.4 g / 32.0 N
|
warning |
| 2 mm |
2999 Gs
299.9 mT
|
2.16 kg / 4.76 pounds
2159.7 g / 21.2 N
|
warning |
| 3 mm |
2386 Gs
238.6 mT
|
1.37 kg / 3.01 pounds
1366.7 g / 13.4 N
|
low risk |
| 5 mm |
1474 Gs
147.4 mT
|
0.52 kg / 1.15 pounds
521.4 g / 5.1 N
|
low risk |
| 10 mm |
489 Gs
48.9 mT
|
0.06 kg / 0.13 pounds
57.4 g / 0.6 N
|
low risk |
| 15 mm |
205 Gs
20.5 mT
|
0.01 kg / 0.02 pounds
10.1 g / 0.1 N
|
low risk |
| 20 mm |
103 Gs
10.3 mT
|
0.00 kg / 0.01 pounds
2.5 g / 0.0 N
|
low risk |
| 30 mm |
36 Gs
3.6 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
low risk |
| 50 mm |
9 Gs
0.9 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding force (vertical surface)
MW 12x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.92 kg / 2.03 pounds
920.0 g / 9.0 N
|
| 1 mm | Stal (~0.2) |
0.65 kg / 1.44 pounds
654.0 g / 6.4 N
|
| 2 mm | Stal (~0.2) |
0.43 kg / 0.95 pounds
432.0 g / 4.2 N
|
| 3 mm | Stal (~0.2) |
0.27 kg / 0.60 pounds
274.0 g / 2.7 N
|
| 5 mm | Stal (~0.2) |
0.10 kg / 0.23 pounds
104.0 g / 1.0 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
12.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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: Vertical assembly (shearing) - behavior on slippery surfaces
MW 12x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.38 kg / 3.04 pounds
1380.0 g / 13.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.92 kg / 2.03 pounds
920.0 g / 9.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.46 kg / 1.01 pounds
460.0 g / 4.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.30 kg / 5.07 pounds
2300.0 g / 22.6 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 12x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.46 kg / 1.01 pounds
460.0 g / 4.5 N
|
| 1 mm |
|
1.15 kg / 2.54 pounds
1150.0 g / 11.3 N
|
| 2 mm |
|
2.30 kg / 5.07 pounds
2300.0 g / 22.6 N
|
| 3 mm |
|
3.45 kg / 7.61 pounds
3450.0 g / 33.8 N
|
| 5 mm |
|
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
| 10 mm |
|
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
| 11 mm |
|
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
| 12 mm |
|
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
Table 5: Thermal stability (material behavior) - thermal limit
MW 12x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
|
OK |
| 40 °C | -2.2% |
4.50 kg / 9.92 pounds
4498.8 g / 44.1 N
|
OK |
| 60 °C | -4.4% |
4.40 kg / 9.70 pounds
4397.6 g / 43.1 N
|
|
| 80 °C | -6.6% |
4.30 kg / 9.47 pounds
4296.4 g / 42.1 N
|
|
| 100 °C | -28.8% |
3.28 kg / 7.22 pounds
3275.2 g / 32.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 12x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
13.36 kg / 29.45 pounds
5 536 Gs
|
2.00 kg / 4.42 pounds
2004 g / 19.7 N
|
N/A |
| 1 mm |
11.39 kg / 25.10 pounds
8 082 Gs
|
1.71 kg / 3.77 pounds
1708 g / 16.8 N
|
10.25 kg / 22.59 pounds
~0 Gs
|
| 2 mm |
9.48 kg / 20.91 pounds
7 376 Gs
|
1.42 kg / 3.14 pounds
1423 g / 14.0 N
|
8.54 kg / 18.82 pounds
~0 Gs
|
| 3 mm |
7.77 kg / 17.12 pounds
6 675 Gs
|
1.17 kg / 2.57 pounds
1165 g / 11.4 N
|
6.99 kg / 15.41 pounds
~0 Gs
|
| 5 mm |
5.01 kg / 11.05 pounds
5 361 Gs
|
0.75 kg / 1.66 pounds
752 g / 7.4 N
|
4.51 kg / 9.94 pounds
~0 Gs
|
| 10 mm |
1.51 kg / 3.34 pounds
2 948 Gs
|
0.23 kg / 0.50 pounds
227 g / 2.2 N
|
1.36 kg / 3.01 pounds
~0 Gs
|
| 20 mm |
0.17 kg / 0.37 pounds
978 Gs
|
0.02 kg / 0.06 pounds
25 g / 0.2 N
|
0.15 kg / 0.33 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 pounds
116 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
72 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
48 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
33 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
24 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
18 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 12x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 4.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.0 cm |
| Car key | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Dynamics (cracking risk) - collision effects
MW 12x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
30.55 km/h
(8.49 m/s)
|
0.18 J | |
| 30 mm |
52.51 km/h
(14.59 m/s)
|
0.54 J | |
| 50 mm |
67.79 km/h
(18.83 m/s)
|
0.90 J | |
| 100 mm |
95.87 km/h
(26.63 m/s)
|
1.81 J |
Table 9: Corrosion resistance
MW 12x6 / 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 12x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 024 Mx | 50.2 µWb |
| Pc Coefficient | 0.59 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 12x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 4.60 kg | Standard |
| Water (riverbed) |
5.27 kg
(+0.67 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical surface, the magnet holds merely a fraction of its max power.
2. Steel saturation
*Thin steel (e.g. computer case) severely weakens the holding force.
3. Thermal stability
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.59
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.
Chemical composition
| 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 proposals
Pros and cons of neodymium magnets.
Advantages
- They do not lose strength, even over nearly 10 years – the decrease in strength is only ~1% (based on measurements),
- They possess excellent resistance to magnetic field loss when exposed to external fields,
- In other words, due to the reflective layer of silver, the element is aesthetically pleasing,
- They show high magnetic induction at the operating surface, making them more effective,
- Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to freedom in constructing and the capacity to customize to specific needs,
- Significant place in advanced technology sectors – they serve a role in hard drives, motor assemblies, medical devices, as well as multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which allows their use in miniature devices
Limitations
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
- Neodymium magnets decrease their force 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 stability even at temperatures up to 230°C
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- Limited possibility of creating nuts in the magnet and complex forms - recommended is cover - magnet mounting.
- Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these devices are able to 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
Detachment force of the magnet in optimal conditions – what affects it?
- using a plate made of high-permeability steel, serving as a magnetic yoke
- whose thickness reaches at least 10 mm
- with an ideally smooth contact surface
- under conditions of gap-free contact (metal-to-metal)
- for force applied at a right angle (pull-off, not shear)
- at room temperature
Determinants of practical lifting force of a magnet
- Distance – the presence of foreign body (paint, tape, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
- Base massiveness – too thin plate does not close the flux, causing part of the flux to be escaped to the other side.
- Steel grade – ideal substrate is high-permeability steel. Hardened steels may attract less.
- Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
- Temperature – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.
Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate reduces the holding force.
Warnings
Avoid contact if allergic
Certain individuals experience a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Extended handling can result in dermatitis. We strongly advise wear protective gloves.
Dust is flammable
Mechanical processing of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.
Medical implants
Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.
Compass and GPS
An intense magnetic field negatively affects the operation of magnetometers in phones and GPS navigation. Maintain magnets close to a smartphone to prevent breaking the sensors.
Conscious usage
Be careful. Neodymium magnets act from a long distance and snap with massive power, often faster than you can react.
Keep away from computers
Intense magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Stay away of min. 10 cm.
Crushing risk
Large magnets can break fingers instantly. Never place your hand betwixt two strong magnets.
This is not a toy
Always store magnets away from children. Ingestion danger is high, and the consequences of magnets connecting inside the body are very dangerous.
Permanent damage
Standard neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. This process is irreversible.
Risk of cracking
Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
