MW 12x4 / N52 - cylindrical magnet
cylindrical magnet
Catalog no 010500
GTIN/EAN: 5906301814962
Diameter Ø
12 mm [±0,1 mm]
Height
4 mm [±0,1 mm]
Weight
3.39 g
Magnetization Direction
↑ axial
Load capacity
4.68 kg / 45.89 N
Magnetic Induction
400.45 mT / 4005 Gs
Coating
[NiCuNi] Nickel
2.18 ZŁ with VAT / pcs + price for transport
1.770 ZŁ net + 23% VAT / pcs
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Technical parameters of the product - MW 12x4 / N52 - cylindrical magnet
Specification / characteristics - MW 12x4 / N52 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010500 |
| GTIN/EAN | 5906301814962 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 4 mm [±0,1 mm] |
| Weight | 3.39 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 4.68 kg / 45.89 N |
| Magnetic Induction ~ ? | 400.45 mT / 4005 Gs |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±0.1 mm |
Magnetic properties of material N52
| properties | values | units |
|---|---|---|
| remenance Br [min. - max.] ? | 14.2-14.7 | kGs |
| remenance Br [min. - max.] ? | 1420-1470 | mT |
| coercivity bHc ? | 10.8-12.5 | kOe |
| coercivity bHc ? | 860-995 | kA/m |
| actual internal force iHc | ≥ 12 | kOe |
| actual internal force iHc | ≥ 955 | kA/m |
| energy density [min. - max.] ? | 48-53 | BH max MGOe |
| energy density [min. - max.] ? | 380-422 | 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 product - data
The following information represent the direct effect of a engineering analysis. Values are based on algorithms for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Please consider these calculations as a supplementary guide for designers.
Table 1: Static pull force (force vs distance) - power drop
MW 12x4 / N52
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4003 Gs
400.3 mT
|
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
|
medium risk |
| 1 mm |
3438 Gs
343.8 mT
|
3.45 kg / 7.61 pounds
3451.9 g / 33.9 N
|
medium risk |
| 2 mm |
2824 Gs
282.4 mT
|
2.33 kg / 5.14 pounds
2329.8 g / 22.9 N
|
medium risk |
| 3 mm |
2255 Gs
225.5 mT
|
1.48 kg / 3.27 pounds
1484.8 g / 14.6 N
|
weak grip |
| 5 mm |
1386 Gs
138.6 mT
|
0.56 kg / 1.24 pounds
561.3 g / 5.5 N
|
weak grip |
| 10 mm |
445 Gs
44.5 mT
|
0.06 kg / 0.13 pounds
58.0 g / 0.6 N
|
weak grip |
| 15 mm |
181 Gs
18.1 mT
|
0.01 kg / 0.02 pounds
9.6 g / 0.1 N
|
weak grip |
| 20 mm |
89 Gs
8.9 mT
|
0.00 kg / 0.01 pounds
2.3 g / 0.0 N
|
weak grip |
| 30 mm |
30 Gs
3.0 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
weak grip |
| 50 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Sliding capacity (wall)
MW 12x4 / N52
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.94 kg / 2.06 pounds
936.0 g / 9.2 N
|
| 1 mm | Stal (~0.2) |
0.69 kg / 1.52 pounds
690.0 g / 6.8 N
|
| 2 mm | Stal (~0.2) |
0.47 kg / 1.03 pounds
466.0 g / 4.6 N
|
| 3 mm | Stal (~0.2) |
0.30 kg / 0.65 pounds
296.0 g / 2.9 N
|
| 5 mm | Stal (~0.2) |
0.11 kg / 0.25 pounds
112.0 g / 1.1 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: Wall mounting (shearing) - vertical pull
MW 12x4 / N52
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.40 kg / 3.10 pounds
1404.0 g / 13.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.94 kg / 2.06 pounds
936.0 g / 9.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.47 kg / 1.03 pounds
468.0 g / 4.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.34 kg / 5.16 pounds
2340.0 g / 23.0 N
|
Table 4: Material efficiency (substrate influence) - power losses
MW 12x4 / N52
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.47 kg / 1.03 pounds
468.0 g / 4.6 N
|
| 1 mm |
|
1.17 kg / 2.58 pounds
1170.0 g / 11.5 N
|
| 2 mm |
|
2.34 kg / 5.16 pounds
2340.0 g / 23.0 N
|
| 3 mm |
|
3.51 kg / 7.74 pounds
3510.0 g / 34.4 N
|
| 5 mm |
|
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
|
| 10 mm |
|
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
|
| 11 mm |
|
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
|
| 12 mm |
|
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
|
Table 5: Thermal resistance (stability) - thermal limit
MW 12x4 / N52
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
|
OK |
| 40 °C | -2.2% |
4.58 kg / 10.09 pounds
4577.0 g / 44.9 N
|
OK |
| 60 °C | -4.4% |
4.47 kg / 9.86 pounds
4474.1 g / 43.9 N
|
|
| 80 °C | -6.6% |
4.37 kg / 9.64 pounds
4371.1 g / 42.9 N
|
|
| 100 °C | -28.8% |
3.33 kg / 7.35 pounds
3332.2 g / 32.7 N
|
Table 6: Two magnets (repulsion) - forces in the system
MW 12x4 / N52
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
11.17 kg / 24.63 pounds
5 771 Gs
|
1.68 kg / 3.69 pounds
1676 g / 16.4 N
|
N/A |
| 1 mm |
9.73 kg / 21.44 pounds
7 470 Gs
|
1.46 kg / 3.22 pounds
1459 g / 14.3 N
|
8.75 kg / 19.30 pounds
~0 Gs
|
| 2 mm |
8.24 kg / 18.16 pounds
6 875 Gs
|
1.24 kg / 2.72 pounds
1236 g / 12.1 N
|
7.42 kg / 16.35 pounds
~0 Gs
|
| 3 mm |
6.83 kg / 15.06 pounds
6 260 Gs
|
1.02 kg / 2.26 pounds
1024 g / 10.1 N
|
6.15 kg / 13.55 pounds
~0 Gs
|
| 5 mm |
4.46 kg / 9.84 pounds
5 060 Gs
|
0.67 kg / 1.48 pounds
670 g / 6.6 N
|
4.02 kg / 8.86 pounds
~0 Gs
|
| 10 mm |
1.34 kg / 2.95 pounds
2 772 Gs
|
0.20 kg / 0.44 pounds
201 g / 2.0 N
|
1.21 kg / 2.66 pounds
~0 Gs
|
| 20 mm |
0.14 kg / 0.30 pounds
891 Gs
|
0.02 kg / 0.05 pounds
21 g / 0.2 N
|
0.12 kg / 0.27 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
99 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
61 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
40 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
27 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
20 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
15 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (electronics) - warnings
MW 12x4 / N52
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 3.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.0 cm |
| Remote | 50 Gs (5.0 mT) | 2.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Collisions (kinetic energy) - warning
MW 12x4 / N52
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
37.76 km/h
(10.49 m/s)
|
0.19 J | |
| 30 mm |
64.91 km/h
(18.03 m/s)
|
0.55 J | |
| 50 mm |
83.79 km/h
(23.27 m/s)
|
0.92 J | |
| 100 mm |
118.50 km/h
(32.92 m/s)
|
1.84 J |
Table 9: Anti-corrosion coating durability
MW 12x4 / N52
| 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 12x4 / N52
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 794 Mx | 47.9 µWb |
| Pc Coefficient | 0.44 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 12x4 / N52
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 4.68 kg | Standard |
| Water (riverbed) |
5.36 kg
(+0.68 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical wall, the magnet retains just ~20% of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) drastically reduces the holding force.
3. Temperature resistance
*For N38 material, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.44
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 |
Check out also products
Advantages and disadvantages of rare earth magnets.
Pros
- They do not lose magnetism, even over approximately 10 years – the drop in power is only ~1% (based on measurements),
- Neodymium magnets are distinguished by remarkably resistant to demagnetization caused by external magnetic fields,
- By using a lustrous coating of silver, the element acquires an proper look,
- The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- In view of the potential of precise molding and customization to custom solutions, neodymium magnets can be modeled in a variety of shapes and sizes, which amplifies use scope,
- Universal use in innovative solutions – they find application in data components, electromotive mechanisms, precision medical tools, also industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in compact constructions
Cons
- 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 power 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
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
- Limited possibility of creating nuts in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
- Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child safety. Additionally, small elements of these devices can complicate diagnosis medical when they are in the body.
- Due to complex production process, their price is higher than average,
Pull force analysis
Maximum lifting force for a neodymium magnet – what contributes to it?
- with the application of a yoke made of low-carbon steel, ensuring full magnetic saturation
- whose thickness equals approx. 10 mm
- with an ground contact surface
- without the slightest air gap between the magnet and steel
- under vertical force direction (90-degree angle)
- in stable room temperature
Lifting capacity in practice – influencing factors
- Distance (between the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
- Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
- Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be escaped to the other side.
- Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
- Surface structure – the more even the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
- Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet’s surface and the plate reduces the load capacity.
Warnings
Medical implants
Individuals with a heart stimulator should keep an absolute distance from magnets. The magnetic field can stop the operation of the implant.
Serious injuries
Danger of trauma: The pulling power is so immense that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.
Compass and GPS
An intense magnetic field disrupts the operation of magnetometers in smartphones and GPS navigation. Keep magnets near a device to avoid damaging the sensors.
Machining danger
Dust generated during cutting of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
Cards and drives
Intense magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.
Material brittleness
Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.
Respect the power
Use magnets consciously. Their huge power can surprise even experienced users. Stay alert and respect their power.
Heat warning
Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. Damage is permanent.
Avoid contact if allergic
Certain individuals have a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Frequent touching might lead to a rash. It is best to wear safety gloves.
This is not a toy
Neodymium magnets are not suitable for play. Accidental ingestion of several magnets may result in them attracting across intestines, which poses a critical condition and requires urgent medical intervention.
