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 modeling of the assembly - report
These values represent the result of a mathematical calculation. Values rely on models for the material Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.
Table 1: Static pull force (force vs distance) - interaction chart
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 LBS
2620.0 g / 25.7 N
|
warning |
| 1 mm |
5138 Gs
513.8 mT
|
1.83 kg / 4.04 LBS
1831.5 g / 18.0 N
|
low risk |
| 2 mm |
4199 Gs
419.9 mT
|
1.22 kg / 2.70 LBS
1222.9 g / 12.0 N
|
low risk |
| 3 mm |
3388 Gs
338.8 mT
|
0.80 kg / 1.76 LBS
796.3 g / 7.8 N
|
low risk |
| 5 mm |
2194 Gs
219.4 mT
|
0.33 kg / 0.74 LBS
334.0 g / 3.3 N
|
low risk |
| 10 mm |
853 Gs
85.3 mT
|
0.05 kg / 0.11 LBS
50.4 g / 0.5 N
|
low risk |
| 15 mm |
417 Gs
41.7 mT
|
0.01 kg / 0.03 LBS
12.1 g / 0.1 N
|
low risk |
| 20 mm |
239 Gs
23.9 mT
|
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
low risk |
| 30 mm |
103 Gs
10.3 mT
|
0.00 kg / 0.00 LBS
0.7 g / 0.0 N
|
low risk |
| 50 mm |
33 Gs
3.3 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
low risk |
Table 2: Vertical hold (vertical surface)
MW 12x50 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.52 kg / 1.16 LBS
524.0 g / 5.1 N
|
| 1 mm | Stal (~0.2) |
0.37 kg / 0.81 LBS
366.0 g / 3.6 N
|
| 2 mm | Stal (~0.2) |
0.24 kg / 0.54 LBS
244.0 g / 2.4 N
|
| 3 mm | Stal (~0.2) |
0.16 kg / 0.35 LBS
160.0 g / 1.6 N
|
| 5 mm | Stal (~0.2) |
0.07 kg / 0.15 LBS
66.0 g / 0.6 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
10.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Vertical assembly (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 LBS
786.0 g / 7.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.52 kg / 1.16 LBS
524.0 g / 5.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.26 kg / 0.58 LBS
262.0 g / 2.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.31 kg / 2.89 LBS
1310.0 g / 12.9 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 12x50 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.26 kg / 0.58 LBS
262.0 g / 2.6 N
|
| 1 mm |
|
0.66 kg / 1.44 LBS
655.0 g / 6.4 N
|
| 2 mm |
|
1.31 kg / 2.89 LBS
1310.0 g / 12.9 N
|
| 3 mm |
|
1.97 kg / 4.33 LBS
1965.0 g / 19.3 N
|
| 5 mm |
|
2.62 kg / 5.78 LBS
2620.0 g / 25.7 N
|
| 10 mm |
|
2.62 kg / 5.78 LBS
2620.0 g / 25.7 N
|
| 11 mm |
|
2.62 kg / 5.78 LBS
2620.0 g / 25.7 N
|
| 12 mm |
|
2.62 kg / 5.78 LBS
2620.0 g / 25.7 N
|
Table 5: Thermal stability (stability) - power drop
MW 12x50 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.62 kg / 5.78 LBS
2620.0 g / 25.7 N
|
OK |
| 40 °C | -2.2% |
2.56 kg / 5.65 LBS
2562.4 g / 25.1 N
|
OK |
| 60 °C | -4.4% |
2.50 kg / 5.52 LBS
2504.7 g / 24.6 N
|
OK |
| 80 °C | -6.6% |
2.45 kg / 5.39 LBS
2447.1 g / 24.0 N
|
|
| 100 °C | -28.8% |
1.87 kg / 4.11 LBS
1865.4 g / 18.3 N
|
Table 6: Two magnets (attraction) - field collision
MW 12x50 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
26.33 kg / 58.05 LBS
6 179 Gs
|
3.95 kg / 8.71 LBS
3950 g / 38.7 N
|
N/A |
| 1 mm |
22.19 kg / 48.93 LBS
11 284 Gs
|
3.33 kg / 7.34 LBS
3329 g / 32.7 N
|
19.97 kg / 44.04 LBS
~0 Gs
|
| 2 mm |
18.41 kg / 40.58 LBS
10 277 Gs
|
2.76 kg / 6.09 LBS
2761 g / 27.1 N
|
16.57 kg / 36.53 LBS
~0 Gs
|
| 3 mm |
15.11 kg / 33.30 LBS
9 309 Gs
|
2.27 kg / 5.00 LBS
2266 g / 22.2 N
|
13.60 kg / 29.97 LBS
~0 Gs
|
| 5 mm |
9.94 kg / 21.91 LBS
7 551 Gs
|
1.49 kg / 3.29 LBS
1491 g / 14.6 N
|
8.94 kg / 19.72 LBS
~0 Gs
|
| 10 mm |
3.36 kg / 7.40 LBS
4 389 Gs
|
0.50 kg / 1.11 LBS
504 g / 4.9 N
|
3.02 kg / 6.66 LBS
~0 Gs
|
| 20 mm |
0.51 kg / 1.12 LBS
1 706 Gs
|
0.08 kg / 0.17 LBS
76 g / 0.7 N
|
0.46 kg / 1.01 LBS
~0 Gs
|
| 50 mm |
0.02 kg / 0.04 LBS
303 Gs
|
0.00 kg / 0.01 LBS
2 g / 0.0 N
|
0.01 kg / 0.03 LBS
~0 Gs
|
| 60 mm |
0.01 kg / 0.02 LBS
206 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 70 mm |
0.00 kg / 0.01 LBS
148 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 LBS
110 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 LBS
84 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 LBS
66 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (electronics) - warnings
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 |
| Phone / Smartphone | 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 (cracking risk) - collision effects
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: Anti-corrosion coating durability
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. Vertical hold
*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its perpendicular strength.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) significantly reduces the holding force.
3. Thermal stability
*For N38 grade, the safety limit 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.
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Advantages as well as disadvantages of Nd2Fe14B magnets.
Strengths
- Their power is maintained, and after approximately 10 years it drops only by ~1% (according to research),
- They feature excellent resistance to weakening of magnetic properties when exposed to external fields,
- A magnet with a shiny gold surface looks better,
- Neodymium magnets generate maximum magnetic induction on a contact point, which allows for strong attraction,
- 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...
- Thanks to the potential of free molding and customization to unique requirements, magnetic components can be manufactured in a broad palette of geometric configurations, which expands the range of possible applications,
- Fundamental importance in modern industrial fields – they are utilized in data components, electric motors, advanced medical instruments, and complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in miniature devices
Disadvantages
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
- Neodymium magnets lose 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- We suggest a housing - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated shapes.
- Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities
Pull force analysis
Best holding force of the magnet in ideal parameters – what affects it?
- using a plate made of mild steel, functioning as a circuit closing element
- whose transverse dimension is min. 10 mm
- characterized by smoothness
- under conditions of ideal adhesion (surface-to-surface)
- during detachment in a direction perpendicular to the plane
- at temperature approx. 20 degrees Celsius
Lifting capacity in real conditions – factors
- Air gap (between the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Load vector – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
- Steel thickness – insufficiently thick sheet does not accept the full field, causing part of the flux to be escaped into the air.
- Material type – the best choice is pure iron steel. Hardened steels may generate lower lifting capacity.
- Surface condition – 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 gain strength (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate reduces the load capacity.
Warnings
Serious injuries
Mind your fingers. Two large magnets will snap together immediately with a force of massive weight, crushing anything in their path. Be careful!
Mechanical processing
Combustion risk: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.
Warning for heart patients
Warning for patients: Powerful magnets affect electronics. Keep minimum 30 cm distance or request help to handle the magnets.
Skin irritation risks
Nickel alert: The Ni-Cu-Ni coating contains nickel. If skin irritation happens, cease working with magnets and use protective gear.
Eye protection
Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Threat to electronics
Intense magnetic fields can destroy records on payment cards, hard drives, and storage devices. Stay away of min. 10 cm.
Danger to the youngest
Absolutely keep magnets away from children. Risk of swallowing is significant, and the effects of magnets clamping inside the body are very dangerous.
Power loss in heat
Avoid heat. Neodymium magnets are susceptible to heat. If you need resistance above 80°C, ask us about HT versions (H, SH, UH).
Phone sensors
An intense magnetic field interferes with the operation of compasses in phones and navigation systems. Do not bring magnets close to a smartphone to prevent damaging the sensors.
Handling guide
Use magnets with awareness. Their huge power can surprise even experienced users. Stay alert and respect their force.
