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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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Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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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

Engineering analysis of the magnet - technical parameters

These data are the result of a physical analysis. Results were calculated on models for the class Nd2Fe14B. Actual performance may deviate from the simulation results. Please consider these data as a supplementary guide when designing systems.

Table 1: Static force (force vs distance) - 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 lbs
2620.0 g / 25.7 N
medium risk
1 mm 5138 Gs
513.8 mT
1.83 kg / 4.04 lbs
1831.5 g / 18.0 N
weak grip
2 mm 4199 Gs
419.9 mT
1.22 kg / 2.70 lbs
1222.9 g / 12.0 N
weak grip
3 mm 3388 Gs
338.8 mT
0.80 kg / 1.76 lbs
796.3 g / 7.8 N
weak grip
5 mm 2194 Gs
219.4 mT
0.33 kg / 0.74 lbs
334.0 g / 3.3 N
weak grip
10 mm 853 Gs
85.3 mT
0.05 kg / 0.11 lbs
50.4 g / 0.5 N
weak grip
15 mm 417 Gs
41.7 mT
0.01 kg / 0.03 lbs
12.1 g / 0.1 N
weak grip
20 mm 239 Gs
23.9 mT
0.00 kg / 0.01 lbs
4.0 g / 0.0 N
weak grip
30 mm 103 Gs
10.3 mT
0.00 kg / 0.00 lbs
0.7 g / 0.0 N
weak grip
50 mm 33 Gs
3.3 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
weak grip

Table 2: Shear load (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) - 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 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 resistance (material behavior) - 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) Sliding 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: Safety (HSE) (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: Dynamics (kinetic energy) - 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: Corrosion resistance
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. Sliding resistance

*Warning: On a vertical wall, the magnet retains only ~20% of its nominal pull.

2. Efficiency vs thickness

*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.

3. Temperature resistance

*For N38 material, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.49

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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.

Engineering data and GPSR
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%
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
Measurement Calculator
Pulling force

Field Strength

Other proposals

The offered product is an extremely powerful cylindrical magnet, manufactured from modern NdFeB material, which, with dimensions of Ø12x50 mm, guarantees the highest energy density. The MW 12x50 / N38 component features a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 2.62 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures 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 rod is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the recommended way 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.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and operational stability. 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 in continuous sale in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 50 mm. 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 protects the surface 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. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Advantages

Apart from their notable magnetism, neodymium magnets have these key benefits:
  • They have unchanged lifting capacity, and over more than ten years their performance decreases symbolically – ~1% (according to theory),
  • They do not lose their magnetic properties even under external field action,
  • Thanks to the shiny finish, the layer of nickel, gold-plated, or silver gives an elegant appearance,
  • Magnetic induction on the working part of the magnet turns out to be strong,
  • 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 option of accurate forming and adaptation to specialized projects, neodymium magnets can be created in a variety of forms and dimensions, which makes them more universal,
  • Significant place in advanced technology sectors – they are commonly used in data components, electric drive systems, medical equipment, as well as complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Limited ability of producing threads in the magnet and complex shapes - preferred is cover - mounting mechanism.
  • Possible danger to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the context of child safety. Furthermore, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

The force parameter is a measurement result executed under specific, ideal conditions:
  • using a sheet made of mild steel, serving as a circuit closing element
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with a surface perfectly flat
  • without the slightest insulating layer between the magnet and steel
  • during pulling in a direction vertical to the plane
  • at temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

During everyday use, the actual holding force depends on a number of factors, listed from the most important:
  • Clearance – the presence of foreign body (paint, dirt, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Material composition – not every steel attracts identically. Alloy additives weaken the interaction with the magnet.
  • Surface structure – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet and the plate decreases the load capacity.

Safe handling of neodymium magnets
Heat sensitivity

Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

Safe operation

Before use, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Nickel coating and allergies

Studies show that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, refrain from direct skin contact and opt for coated magnets.

Pacemakers

People with a ICD must maintain an large gap from magnets. The magnetism can stop the functioning of the implant.

Cards and drives

Very strong magnetic fields can destroy records on payment cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.

Compass and GPS

Be aware: neodymium magnets generate a field that interferes with precision electronics. Keep a separation from your phone, tablet, and GPS.

Product not for children

Only for adults. Small elements can be swallowed, causing intestinal necrosis. Keep out of reach of kids and pets.

Finger safety

Protect your hands. Two powerful magnets will join instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Protective goggles

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Wear goggles.

Flammability

Powder created during grinding of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Important! Details about hazards in the article: Safety of working with magnets.