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MW 12x50 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010020

GTIN/EAN: 5906301810193

5.00

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 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
properties values
Cat. no. 010020
GTIN/EAN 5906301810193
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
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

Specification / characteristics MW 12x50 / N38 - cylindrical magnet
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

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
10%
0.26 kg / 0.58 LBS
262.0 g / 2.6 N
1 mm
25%
0.66 kg / 1.44 LBS
655.0 g / 6.4 N
2 mm
50%
1.31 kg / 2.89 LBS
1310.0 g / 12.9 N
3 mm
75%
1.97 kg / 4.33 LBS
1965.0 g / 19.3 N
5 mm
100%
2.62 kg / 5.78 LBS
2620.0 g / 25.7 N
10 mm
100%
2.62 kg / 5.78 LBS
2620.0 g / 25.7 N
11 mm
100%
2.62 kg / 5.78 LBS
2620.0 g / 25.7 N
12 mm
100%
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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
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.

Technical specification and ecology
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
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010020-2026
Quick Unit Converter
Magnet pull force

Magnetic Induction

Other proposals

The offered product is an extremely powerful cylinder magnet, produced from durable NdFeB material, which, at dimensions of Ø12x50 mm, guarantees the highest energy density. The MW 12x50 / N38 component features high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 2.62 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 25.73 N with a weight of only 42.41 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are strong enough for 90% of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø12x50), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
This model is characterized by dimensions Ø12x50 mm, which, at a weight of 42.41 g, makes it an element with high magnetic energy density. The value of 25.73 N means that the magnet is capable of holding a weight many times exceeding its own mass of 42.41 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 12 mm. Such an arrangement is standard when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized through the diameter if your project requires it.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

Besides their immense pulling force, neodymium magnets offer the following advantages:
  • 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

Cons of neodymium magnets: application proposals
  • 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 parameterswhat affects it?

The lifting capacity listed is a result of laboratory testing conducted under the following configuration:
  • 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

It is worth knowing that the application force may be lower influenced by the following factors, in order of importance:
  • 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.

Caution! More info about hazards in the article: Magnet Safety Guide.