MW 12x50 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010020
GTIN/EAN: 5906301810193
Diameter Ø
12 mm [±0,1 mm]
Height
50 mm [±0,1 mm]
Weight
42.41 g
Magnetization Direction
↑ axial
Load capacity
2.62 kg / 25.73 N
Magnetic Induction
614.94 mT / 6149 Gs
Coating
[NiCuNi] Nickel
28.29 ZŁ with VAT / pcs + price for transport
23.00 ZŁ net + 23% VAT / pcs
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Detailed specification - MW 12x50 / N38 - cylindrical magnet
Specification / characteristics - MW 12x50 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010020 |
| GTIN/EAN | 5906301810193 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 50 mm [±0,1 mm] |
| Weight | 42.41 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.62 kg / 25.73 N |
| Magnetic Induction ~ ? | 614.94 mT / 6149 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 product - technical parameters
These values are the result of a physical calculation. Results rely on algorithms for the class Nd2Fe14B. Actual parameters may differ. Please consider these calculations as a supplementary guide during assembly planning.
Table 1: Static force (force vs gap) - characteristics
MW 12x50 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
6146 Gs
614.6 mT
|
2.62 kg / 5.78 pounds
2620.0 g / 25.7 N
|
strong |
| 1 mm |
5138 Gs
513.8 mT
|
1.83 kg / 4.04 pounds
1831.5 g / 18.0 N
|
weak grip |
| 2 mm |
4199 Gs
419.9 mT
|
1.22 kg / 2.70 pounds
1222.9 g / 12.0 N
|
weak grip |
| 3 mm |
3388 Gs
338.8 mT
|
0.80 kg / 1.76 pounds
796.3 g / 7.8 N
|
weak grip |
| 5 mm |
2194 Gs
219.4 mT
|
0.33 kg / 0.74 pounds
334.0 g / 3.3 N
|
weak grip |
| 10 mm |
853 Gs
85.3 mT
|
0.05 kg / 0.11 pounds
50.4 g / 0.5 N
|
weak grip |
| 15 mm |
417 Gs
41.7 mT
|
0.01 kg / 0.03 pounds
12.1 g / 0.1 N
|
weak grip |
| 20 mm |
239 Gs
23.9 mT
|
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
weak grip |
| 30 mm |
103 Gs
10.3 mT
|
0.00 kg / 0.00 pounds
0.7 g / 0.0 N
|
weak grip |
| 50 mm |
33 Gs
3.3 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
weak grip |
Table 2: Sliding hold (wall)
MW 12x50 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.52 kg / 1.16 pounds
524.0 g / 5.1 N
|
| 1 mm | Stal (~0.2) |
0.37 kg / 0.81 pounds
366.0 g / 3.6 N
|
| 2 mm | Stal (~0.2) |
0.24 kg / 0.54 pounds
244.0 g / 2.4 N
|
| 3 mm | Stal (~0.2) |
0.16 kg / 0.35 pounds
160.0 g / 1.6 N
|
| 5 mm | Stal (~0.2) |
0.07 kg / 0.15 pounds
66.0 g / 0.6 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
10.0 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) - behavior on slippery surfaces
MW 12x50 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.79 kg / 1.73 pounds
786.0 g / 7.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.52 kg / 1.16 pounds
524.0 g / 5.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.26 kg / 0.58 pounds
262.0 g / 2.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.31 kg / 2.89 pounds
1310.0 g / 12.9 N
|
Table 4: Material efficiency (saturation) - power losses
MW 12x50 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.26 kg / 0.58 pounds
262.0 g / 2.6 N
|
| 1 mm |
|
0.66 kg / 1.44 pounds
655.0 g / 6.4 N
|
| 2 mm |
|
1.31 kg / 2.89 pounds
1310.0 g / 12.9 N
|
| 3 mm |
|
1.97 kg / 4.33 pounds
1965.0 g / 19.3 N
|
| 5 mm |
|
2.62 kg / 5.78 pounds
2620.0 g / 25.7 N
|
| 10 mm |
|
2.62 kg / 5.78 pounds
2620.0 g / 25.7 N
|
| 11 mm |
|
2.62 kg / 5.78 pounds
2620.0 g / 25.7 N
|
| 12 mm |
|
2.62 kg / 5.78 pounds
2620.0 g / 25.7 N
|
Table 5: Working in heat (material behavior) - thermal limit
MW 12x50 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.62 kg / 5.78 pounds
2620.0 g / 25.7 N
|
OK |
| 40 °C | -2.2% |
2.56 kg / 5.65 pounds
2562.4 g / 25.1 N
|
OK |
| 60 °C | -4.4% |
2.50 kg / 5.52 pounds
2504.7 g / 24.6 N
|
OK |
| 80 °C | -6.6% |
2.45 kg / 5.39 pounds
2447.1 g / 24.0 N
|
|
| 100 °C | -28.8% |
1.87 kg / 4.11 pounds
1865.4 g / 18.3 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 12x50 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
26.33 kg / 58.05 pounds
6 179 Gs
|
3.95 kg / 8.71 pounds
3950 g / 38.7 N
|
N/A |
| 1 mm |
22.19 kg / 48.93 pounds
11 284 Gs
|
3.33 kg / 7.34 pounds
3329 g / 32.7 N
|
19.97 kg / 44.04 pounds
~0 Gs
|
| 2 mm |
18.41 kg / 40.58 pounds
10 277 Gs
|
2.76 kg / 6.09 pounds
2761 g / 27.1 N
|
16.57 kg / 36.53 pounds
~0 Gs
|
| 3 mm |
15.11 kg / 33.30 pounds
9 309 Gs
|
2.27 kg / 5.00 pounds
2266 g / 22.2 N
|
13.60 kg / 29.97 pounds
~0 Gs
|
| 5 mm |
9.94 kg / 21.91 pounds
7 551 Gs
|
1.49 kg / 3.29 pounds
1491 g / 14.6 N
|
8.94 kg / 19.72 pounds
~0 Gs
|
| 10 mm |
3.36 kg / 7.40 pounds
4 389 Gs
|
0.50 kg / 1.11 pounds
504 g / 4.9 N
|
3.02 kg / 6.66 pounds
~0 Gs
|
| 20 mm |
0.51 kg / 1.12 pounds
1 706 Gs
|
0.08 kg / 0.17 pounds
76 g / 0.7 N
|
0.46 kg / 1.01 pounds
~0 Gs
|
| 50 mm |
0.02 kg / 0.04 pounds
303 Gs
|
0.00 kg / 0.01 pounds
2 g / 0.0 N
|
0.01 kg / 0.03 pounds
~0 Gs
|
| 60 mm |
0.01 kg / 0.02 pounds
206 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
148 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
110 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
84 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
66 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) - precautionary measures
MW 12x50 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 11.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 8.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 6.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 5.0 cm |
| Remote | 50 Gs (5.0 mT) | 4.5 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Collisions (kinetic energy) - warning
MW 12x50 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
8.02 km/h
(2.23 m/s)
|
0.11 J | |
| 30 mm |
13.73 km/h
(3.81 m/s)
|
0.31 J | |
| 50 mm |
17.73 km/h
(4.92 m/s)
|
0.51 J | |
| 100 mm |
25.07 km/h
(6.96 m/s)
|
1.03 J |
Table 9: Surface protection spec
MW 12x50 / 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 12x50 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 8 230 Mx | 82.3 µWb |
| Pc Coefficient | 1.49 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 12x50 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.62 kg | Standard |
| Water (riverbed) |
3.00 kg
(+0.38 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical wall, the magnet retains merely ~20% of its perpendicular strength.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) severely reduces 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) = 1.49
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Advantages and disadvantages of Nd2Fe14B magnets.
Strengths
- They do not lose magnetism, even over approximately 10 years – the decrease in power is only ~1% (based on measurements),
- Magnets very well protect themselves against loss of magnetization caused by ambient magnetic noise,
- Thanks to the smooth finish, the layer of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
- Neodymium magnets create maximum magnetic induction on a small area, which allows for strong attraction,
- Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
- Due to the potential of free forming and customization to unique projects, neodymium magnets can be created in a variety of shapes and sizes, which expands the range of possible applications,
- Versatile presence in high-tech industry – they are utilized in mass storage devices, electromotive mechanisms, advanced medical instruments, also technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which enables their usage in small systems
Limitations
- To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
- When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power 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 corrode. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
- We recommend cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
- Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small components of these devices can be problematic in diagnostics medical in case of swallowing.
- With mass production the cost of neodymium magnets is a challenge,
Pull force analysis
Maximum magnetic pulling force – what it depends on?
- using a plate made of high-permeability steel, functioning as a circuit closing element
- whose transverse dimension reaches at least 10 mm
- characterized by lack of roughness
- under conditions of ideal adhesion (surface-to-surface)
- during pulling in a direction vertical to the plane
- in stable room temperature
Lifting capacity in practice – influencing factors
- Distance (between the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, rust or debris).
- Loading method – catalog parameter refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
- Base massiveness – insufficiently thick sheet does not accept the full field, causing part of the power to be lost to the other side.
- Chemical composition of the base – mild steel gives the best results. Alloy steels lower magnetic permeability and holding force.
- Plate texture – ground elements ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
- Thermal conditions – 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).
Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a slight gap between the magnet’s surface and the plate reduces the holding force.
Safe handling of neodymium magnets
Do not overheat magnets
Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.
Metal Allergy
Nickel alert: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, immediately stop handling magnets and use protective gear.
Risk of cracking
Protect your eyes. Magnets can explode upon violent connection, launching sharp fragments into the air. Wear goggles.
Bone fractures
Watch your fingers. Two powerful magnets will join instantly with a force of massive weight, destroying anything in their path. Be careful!
Protect data
Equipment safety: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, hearing aids, timepieces).
This is not a toy
NdFeB magnets are not suitable for play. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and necessitates urgent medical intervention.
Keep away from electronics
A strong magnetic field negatively affects the functioning of compasses in phones and navigation systems. Do not bring magnets close to a device to prevent breaking the sensors.
Handling guide
Handle magnets with awareness. Their immense force can surprise even professionals. Stay alert and do not underestimate their force.
Mechanical processing
Fire hazard: Neodymium dust is explosive. Avoid machining magnets in home conditions as this may cause fire.
Warning for heart patients
Individuals with a heart stimulator must maintain an large gap from magnets. The magnetic field can interfere with the operation of the implant.
