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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 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
10%
0.26 kg / 0.58 pounds
262.0 g / 2.6 N
1 mm
25%
0.66 kg / 1.44 pounds
655.0 g / 6.4 N
2 mm
50%
1.31 kg / 2.89 pounds
1310.0 g / 12.9 N
3 mm
75%
1.97 kg / 4.33 pounds
1965.0 g / 19.3 N
5 mm
100%
2.62 kg / 5.78 pounds
2620.0 g / 25.7 N
10 mm
100%
2.62 kg / 5.78 pounds
2620.0 g / 25.7 N
11 mm
100%
2.62 kg / 5.78 pounds
2620.0 g / 25.7 N
12 mm
100%
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%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
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.

Technical specification and ecology
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
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
Magnet Unit Converter
Force (pull)

Magnetic Field

Other products

The offered product is an incredibly powerful rod magnet, manufactured from advanced NdFeB material, which, at dimensions of Ø12x50 mm, guarantees optimal power. The MW 12x50 / N38 component is characterized by high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 2.62 kg), this product is available off-the-shelf from our European logistics center, ensuring quick 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.
It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 25.73 N with a weight of only 42.41 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 12.1 mm) using epoxy glues. To ensure stability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets N38 are suitable for 90% of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø12x50), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf 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 key parameter here is the holding force amounting to approximately 2.62 kg (force ~25.73 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, 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 most desirable 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 diametrically if your project requires it.

Advantages and disadvantages of Nd2Fe14B magnets.

Strengths

Apart from their consistent magnetism, neodymium magnets have these key benefits:
  • 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

Disadvantages of NdFeB magnets:
  • 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 forcewhat it depends on?

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

It is worth knowing that the working load may be lower subject to elements below, starting with the most relevant:
  • 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.

Danger! More info about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98