Powerful neodymium magnets: discs and cylinders

Looking for massive power in small size? We offer rich assortment of disc, cylindrical and ring magnets. Best choice for domestic applications, workshop and industrial tasks. Check our offer with fast shipping.

see price list and dimensions

Equipment for treasure hunters

Begin your hobby with treasure salvaging! Our double-handle grips (F200, F400) provide safety guarantee and immense power. Stainless steel construction and reinforced ropes will perform in rivers and lakes.

find your water magnet

Magnetic mounts for industry

Proven solutions for mounting without drilling. Threaded grips (M8, M10, M12) guarantee instant organization of work on warehouses. They are indispensable mounting lamps, sensors and banners.

see available threads

🚀 Express processing: orders by 14:00 shipped within 24h!

Dhit sp. z o.o.
Product available Ships today (order by 14:00)

MW 12x4 / N52 - cylindrical magnet

cylindrical magnet

Catalog no 010500

GTIN/EAN: 5906301814962

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

3.39 g

Magnetization Direction

↑ axial

Load capacity

4.68 kg / 45.89 N

Magnetic Induction

400.45 mT / 4005 Gs

Coating

[NiCuNi] Nickel

2.18 with VAT / pcs + price for transport

1.770 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
1.770 ZŁ
2.18 ZŁ
price from 350 pcs
1.664 ZŁ
2.05 ZŁ
price from 1450 pcs
1.558 ZŁ
1.916 ZŁ
Not sure which magnet to buy?

Call us +48 22 499 98 98 or contact us using form the contact section.
Lifting power and form of magnetic components can be estimated with our magnetic calculator.

Same-day shipping for orders placed before 14:00.

Technical parameters of the product - MW 12x4 / N52 - cylindrical magnet

Specification / characteristics - MW 12x4 / N52 - cylindrical magnet

properties
properties values
Cat. no. 010500
GTIN/EAN 5906301814962
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 4 mm [±0,1 mm]
Weight 3.39 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.68 kg / 45.89 N
Magnetic Induction ~ ? 400.45 mT / 4005 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N52

Specification / characteristics MW 12x4 / N52 - cylindrical magnet
properties values units
remenance Br [min. - max.] ? 14.2-14.7 kGs
remenance Br [min. - max.] ? 1420-1470 mT
coercivity bHc ? 10.8-12.5 kOe
coercivity bHc ? 860-995 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 48-53 BH max MGOe
energy density [min. - max.] ? 380-422 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

Technical analysis of the product - data

The following information represent the direct effect of a engineering analysis. Values are based on algorithms for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Please consider these calculations as a supplementary guide for designers.

Table 1: Static pull force (force vs distance) - power drop
MW 12x4 / N52

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4003 Gs
400.3 mT
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
medium risk
1 mm 3438 Gs
343.8 mT
3.45 kg / 7.61 pounds
3451.9 g / 33.9 N
medium risk
2 mm 2824 Gs
282.4 mT
2.33 kg / 5.14 pounds
2329.8 g / 22.9 N
medium risk
3 mm 2255 Gs
225.5 mT
1.48 kg / 3.27 pounds
1484.8 g / 14.6 N
weak grip
5 mm 1386 Gs
138.6 mT
0.56 kg / 1.24 pounds
561.3 g / 5.5 N
weak grip
10 mm 445 Gs
44.5 mT
0.06 kg / 0.13 pounds
58.0 g / 0.6 N
weak grip
15 mm 181 Gs
18.1 mT
0.01 kg / 0.02 pounds
9.6 g / 0.1 N
weak grip
20 mm 89 Gs
8.9 mT
0.00 kg / 0.01 pounds
2.3 g / 0.0 N
weak grip
30 mm 30 Gs
3.0 mT
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
weak grip
50 mm 7 Gs
0.7 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

Table 2: Sliding capacity (wall)
MW 12x4 / N52

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.94 kg / 2.06 pounds
936.0 g / 9.2 N
1 mm Stal (~0.2) 0.69 kg / 1.52 pounds
690.0 g / 6.8 N
2 mm Stal (~0.2) 0.47 kg / 1.03 pounds
466.0 g / 4.6 N
3 mm Stal (~0.2) 0.30 kg / 0.65 pounds
296.0 g / 2.9 N
5 mm Stal (~0.2) 0.11 kg / 0.25 pounds
112.0 g / 1.1 N
10 mm Stal (~0.2) 0.01 kg / 0.03 pounds
12.0 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) - vertical pull
MW 12x4 / N52

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.40 kg / 3.10 pounds
1404.0 g / 13.8 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.94 kg / 2.06 pounds
936.0 g / 9.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.47 kg / 1.03 pounds
468.0 g / 4.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.34 kg / 5.16 pounds
2340.0 g / 23.0 N

Table 4: Material efficiency (substrate influence) - power losses
MW 12x4 / N52

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.47 kg / 1.03 pounds
468.0 g / 4.6 N
1 mm
25%
1.17 kg / 2.58 pounds
1170.0 g / 11.5 N
2 mm
50%
2.34 kg / 5.16 pounds
2340.0 g / 23.0 N
3 mm
75%
3.51 kg / 7.74 pounds
3510.0 g / 34.4 N
5 mm
100%
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
10 mm
100%
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
11 mm
100%
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
12 mm
100%
4.68 kg / 10.32 pounds
4680.0 g / 45.9 N

Table 5: Thermal resistance (stability) - thermal limit
MW 12x4 / N52

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.68 kg / 10.32 pounds
4680.0 g / 45.9 N
OK
40 °C -2.2% 4.58 kg / 10.09 pounds
4577.0 g / 44.9 N
OK
60 °C -4.4% 4.47 kg / 9.86 pounds
4474.1 g / 43.9 N
80 °C -6.6% 4.37 kg / 9.64 pounds
4371.1 g / 42.9 N
100 °C -28.8% 3.33 kg / 7.35 pounds
3332.2 g / 32.7 N

Table 6: Two magnets (repulsion) - forces in the system
MW 12x4 / N52

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 11.17 kg / 24.63 pounds
5 771 Gs
1.68 kg / 3.69 pounds
1676 g / 16.4 N
N/A
1 mm 9.73 kg / 21.44 pounds
7 470 Gs
1.46 kg / 3.22 pounds
1459 g / 14.3 N
8.75 kg / 19.30 pounds
~0 Gs
2 mm 8.24 kg / 18.16 pounds
6 875 Gs
1.24 kg / 2.72 pounds
1236 g / 12.1 N
7.42 kg / 16.35 pounds
~0 Gs
3 mm 6.83 kg / 15.06 pounds
6 260 Gs
1.02 kg / 2.26 pounds
1024 g / 10.1 N
6.15 kg / 13.55 pounds
~0 Gs
5 mm 4.46 kg / 9.84 pounds
5 060 Gs
0.67 kg / 1.48 pounds
670 g / 6.6 N
4.02 kg / 8.86 pounds
~0 Gs
10 mm 1.34 kg / 2.95 pounds
2 772 Gs
0.20 kg / 0.44 pounds
201 g / 2.0 N
1.21 kg / 2.66 pounds
~0 Gs
20 mm 0.14 kg / 0.30 pounds
891 Gs
0.02 kg / 0.05 pounds
21 g / 0.2 N
0.12 kg / 0.27 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
99 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
61 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
40 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
27 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
20 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
15 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) - warnings
MW 12x4 / N52

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 3.0 cm
Remote 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Collisions (kinetic energy) - warning
MW 12x4 / N52

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 37.76 km/h
(10.49 m/s)
0.19 J
30 mm 64.91 km/h
(18.03 m/s)
0.55 J
50 mm 83.79 km/h
(23.27 m/s)
0.92 J
100 mm 118.50 km/h
(32.92 m/s)
1.84 J

Table 9: Anti-corrosion coating durability
MW 12x4 / N52

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 (Flux)
MW 12x4 / N52

Parameter Value SI Unit / Description
Magnetic Flux 4 794 Mx 47.9 µWb
Pc Coefficient 0.44 Low (Flat)

Table 11: Hydrostatics and buoyancy
MW 12x4 / N52

Environment Effective steel pull Effect
Air (land) 4.68 kg Standard
Water (riverbed) 5.36 kg
(+0.68 kg buoyancy gain)
+14.5%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

*Warning: On a vertical wall, the magnet retains just ~20% of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically reduces the holding force.

3. Temperature resistance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.44

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.

Engineering data and GPSR
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%
Sustainability
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: 010500-2026
Measurement Calculator
Magnet pull force

Field Strength

Check out also products

The presented product is an exceptionally strong cylinder magnet, produced from modern NdFeB material, which, with dimensions of Ø12x4 mm, guarantees maximum efficiency. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 4.68 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 45.89 N with a weight of only 3.39 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are strong enough for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø12x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 4 mm. The key parameter here is the holding force amounting to approximately 4.68 kg (force ~45.89 N), which, with such compact dimensions, proves the high power of the NdFeB material. 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. 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 rare earth magnets.

Pros

Besides their remarkable pulling force, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even over approximately 10 years – the drop in power is only ~1% (based on measurements),
  • Neodymium magnets are distinguished by remarkably resistant to demagnetization caused by external magnetic fields,
  • By using a lustrous coating of silver, the element acquires an proper look,
  • The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
  • 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 potential of precise molding and customization to custom solutions, neodymium magnets can be modeled in a variety of shapes and sizes, which amplifies use scope,
  • Universal use in innovative solutions – they find application in data components, electromotive mechanisms, precision medical tools, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in compact constructions

Cons

What to avoid - cons of neodymium magnets: application proposals
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • Neodymium magnets lose their power 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
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited possibility of creating nuts in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
  • Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child safety. Additionally, small elements of these devices can complicate diagnosis medical when they are in the body.
  • Due to complex production process, their price is higher than average,

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

The load parameter shown represents the maximum value, recorded under optimal environment, namely:
  • with the application of a yoke made of low-carbon steel, ensuring full magnetic saturation
  • whose thickness equals approx. 10 mm
  • with an ground contact surface
  • without the slightest air gap between the magnet and steel
  • under vertical force direction (90-degree angle)
  • in stable room temperature

Lifting capacity in practice – influencing factors

Please note that the application force may be lower influenced by elements below, in order of importance:
  • Distance (between the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
  • Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be escaped to the other side.
  • Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Surface structure – the more even the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Warnings
Medical implants

Individuals with a heart stimulator should keep an absolute distance from magnets. The magnetic field can stop the operation of the implant.

Serious injuries

Danger of trauma: The pulling power is so immense that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Compass and GPS

An intense magnetic field disrupts the operation of magnetometers in smartphones and GPS navigation. Keep magnets near a device to avoid damaging the sensors.

Machining danger

Dust generated during cutting of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Cards and drives

Intense magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Material brittleness

Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Respect the power

Use magnets consciously. Their huge power can surprise even experienced users. Stay alert and respect their power.

Heat warning

Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. Damage is permanent.

Avoid contact if allergic

Certain individuals have a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Frequent touching might lead to a rash. It is best to wear safety gloves.

This is not a toy

Neodymium magnets are not suitable for play. Accidental ingestion of several magnets may result in them attracting across intestines, which poses a critical condition and requires urgent medical intervention.

Important! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98