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MW 25x2.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010449

GTIN/EAN: 5906301811121

5.00
Load capacity 2.55 kg / 25.03 N Magnetic Induction 121.57 mT / 1216 Gs
Diameter Ø
25 mm [±0,1 mm]
Height
2.5 mm [±0,1 mm]
Weight
9.2 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product parameters »

3.21 zł net / pcs

3.95 zł with VAT (23% VAT) / pcs

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Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Guides from the knowledge base

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.

PDF report Calculator
Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Product card - MW 25x2.5 / N38 - cylindrical magnet

Specification / characteristics - MW 25x2.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010449
GTIN/EAN 5906301811121
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 25 mm [±0,1 mm]
Height 2.5 mm [±0,1 mm]
Weight 9.2 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.55 kg / 25.03 N
Magnetic Induction ~ ? 121.57 mT / 1216 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 25x2.5 / N38 - cylindrical magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 simulation of the assembly - technical parameters

Presented information represent the outcome of a engineering simulation. Values were calculated on models for the class Nd2Fe14B. Real-world conditions may differ. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs gap) - interaction chart
MW 25x2.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1216 Gs
121.6 mT
 2.55 kg / 5.62 lbs
2550.0 g / 25.0 N
 warning
1 mm 1177 Gs
117.7 mT
 2.39 kg / 5.27 lbs
2391.6 g / 23.5 N
 warning
2 mm 1121 Gs
112.1 mT
 2.17 kg / 4.78 lbs
2166.6 g / 21.3 N
 warning
3 mm 1050 Gs
105.0 mT
 1.90 kg / 4.19 lbs
1902.7 g / 18.7 N
 weak grip
5 mm 887 Gs
88.7 mT
 1.36 kg / 2.99 lbs
1358.4 g / 13.3 N
 weak grip
10 mm 511 Gs
51.1 mT
 0.45 kg / 0.99 lbs
450.5 g / 4.4 N
 weak grip
15 mm 282 Gs
28.2 mT
 0.14 kg / 0.30 lbs
137.4 g / 1.3 N
 weak grip
20 mm 162 Gs
16.2 mT
 0.05 kg / 0.10 lbs
45.4 g / 0.4 N
 weak grip
30 mm 64 Gs
6.4 mT
 0.01 kg / 0.02 lbs
7.0 g / 0.1 N
 weak grip
50 mm 17 Gs
1.7 mT
 0.00 kg / 0.00 lbs
0.5 g / 0.0 N
 weak grip
Grip strength weakens drastically with every subsequent millimeter of gap. Keep in mind that every additional insulation layer (e.g., dirt, varnish, rust) significantly diminishes the holding power. Magnetic products operate most effectively during direct contact; air break nullifies the force. See how flashily the load capacity plummet, when the product does not adhere tightly to the metal substrate. When calculating the arrangement, discard redundant distances.

Table 2: Vertical load (vertical surface)
MW 25x2.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.51 kg / 1.12 lbs
510.0 g / 5.0 N
1 mm Stal (~0.2) 0.48 kg / 1.05 lbs
478.0 g / 4.7 N
2 mm Stal (~0.2) 0.43 kg / 0.96 lbs
434.0 g / 4.3 N
3 mm Stal (~0.2) 0.38 kg / 0.84 lbs
380.0 g / 3.7 N
5 mm Stal (~0.2) 0.27 kg / 0.60 lbs
272.0 g / 2.7 N
10 mm Stal (~0.2) 0.09 kg / 0.20 lbs
90.0 g / 0.9 N
15 mm Stal (~0.2) 0.03 kg / 0.06 lbs
28.0 g / 0.3 N
20 mm Stal (~0.2) 0.01 kg / 0.02 lbs
10.0 g / 0.1 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
This section defines the estimated shear load sufficient to start the sliding of the magnet vertically against a upright steel wall (considering standard friction coefficient). The holding force is a function of the gap size between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MW 25x2.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.76 kg / 1.69 lbs
765.0 g / 7.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.51 kg / 1.12 lbs
510.0 g / 5.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.26 kg / 0.56 lbs
255.0 g / 2.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.28 kg / 2.81 lbs
1275.0 g / 12.5 N
When hanging a magnet on a upright plane (e.g., a board), it will maintain just approx. 1/5 of nominal attraction strength. Gravitational force and a weak degree of grip mean that holders move down easier than they pop off the substrate. Designing a wall mount? Remember that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the holder will slip down under a significantly smaller weight. Utilizing a rubberized layer can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - power losses
MW 25x2.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.26 kg / 0.56 lbs
255.0 g / 2.5 N
1 mm
25%
 0.64 kg / 1.41 lbs
637.5 g / 6.3 N
2 mm
50%
 1.28 kg / 2.81 lbs
1275.0 g / 12.5 N
3 mm
75%
 1.91 kg / 4.22 lbs
1912.5 g / 18.8 N
5 mm
100%
 2.55 kg / 5.62 lbs
2550.0 g / 25.0 N
10 mm
100%
 2.55 kg / 5.62 lbs
2550.0 g / 25.0 N
11 mm
100%
 2.55 kg / 5.62 lbs
2550.0 g / 25.0 N
12 mm
100%
 2.55 kg / 5.62 lbs
2550.0 g / 25.0 N
A thin metal plate is not enough to conduct the full magnetic flux, which squanders power of the magnet. Should you install a neodymium to a too thin substrate, the field will pass right through and the pull force will drop sharply. To utilize the maximum of this neodymium's power, you require a sufficiently solid backing of metal. The material oversaturation means that on thin elements (e.g., thin profiles), the magnet holds weaker. We advise picking the steel dimension according to the table below.

Table 5: Thermal stability (material behavior) - power drop
MW 25x2.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.55 kg / 5.62 lbs
2550.0 g / 25.0 N
 OK
40 °C -2.2% 2.49 kg / 5.50 lbs
2493.9 g / 24.5 N
 OK
60 °C -4.4% 2.44 kg / 5.37 lbs
2437.8 g / 23.9 N
80 °C -6.6% 2.38 kg / 5.25 lbs
2381.7 g / 23.4 N
100 °C -28.8% 1.82 kg / 4.00 lbs
1815.6 g / 17.8 N
Standard neodymium magnets irreversibly lose power above the temperature limit. Protect against heat – heat can permanently demagnetize this product. With increasing heat, the neodymium's force temporarily drops. Do not use this product close to heaters exceeding its working range. Ignoring the limit will cause permanent loss of magnetic properties.
*Engineering note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (low Pc) risk losing magnetic properties at lower temperatures compared to rod magnets. Red status in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 25x2.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.47 kg / 9.86 lbs
2 302 Gs
0.67 kg / 1.48 lbs
671 g / 6.6 N
 N/A
1 mm 4.35 kg / 9.59 lbs
2 398 Gs
0.65 kg / 1.44 lbs
653 g / 6.4 N
 3.92 kg / 8.63 lbs
~0 Gs
2 mm 4.19 kg / 9.25 lbs
2 355 Gs
0.63 kg / 1.39 lbs
629 g / 6.2 N
 3.77 kg / 8.32 lbs
~0 Gs
3 mm 4.01 kg / 8.84 lbs
2 302 Gs
0.60 kg / 1.33 lbs
601 g / 5.9 N
 3.61 kg / 7.95 lbs
~0 Gs
5 mm 3.57 kg / 7.88 lbs
2 173 Gs
0.54 kg / 1.18 lbs
536 g / 5.3 N
 3.22 kg / 7.09 lbs
~0 Gs
10 mm 2.38 kg / 5.25 lbs
1 775 Gs
0.36 kg / 0.79 lbs
357 g / 3.5 N
 2.14 kg / 4.73 lbs
~0 Gs
20 mm 0.79 kg / 1.74 lbs
1 022 Gs
0.12 kg / 0.26 lbs
119 g / 1.2 N
 0.71 kg / 1.57 lbs
~0 Gs
50 mm 0.03 kg / 0.07 lbs
198 Gs
0.00 kg / 0.01 lbs
4 g / 0.0 N
 0.03 kg / 0.06 lbs
~0 Gs
60 mm 0.01 kg / 0.03 lbs
127 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
 0.01 kg / 0.02 lbs
~0 Gs
70 mm 0.01 kg / 0.01 lbs
86 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 / 0.01 lbs
61 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
44 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
33 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two magnetic products attract each other from a much further distance than a magnet and sheet combination. The connection of two magnets produces a massive flux and a further horizon of action. Designing a solid fastener? Use a pair of magnets instead of a neodymium and a striker plate. Exercise caution that when connecting a pair of magnets, the pinch force is extreme. The repulsion force is marginally weaker than the attraction, but still impressive.
*Field value between like poles reaches ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
Important: Calculations demonstrate friction force of two identical magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - precautionary measures
MW 25x2.5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.0 cm
Hearing aid 10 Gs (1.0 mT) 6.0 cm
Mechanical watch 20 Gs (2.0 mT) 5.0 cm
Mobile device 40 Gs (4.0 mT) 4.0 cm
Remote 50 Gs (5.0 mT) 3.5 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Extremely neodym field is a serious hazard to electronic devices and medical implants. These neodymiums generate a flux that prevents correct functioning of sensitive medical devices. Be aware: the unseen radiation passes through tissues and housings. Increased vigilance must be taken by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, car keys, speakers, and screens. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - collision effects
MW 25x2.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 19.84 km/h
(5.51 m/s)
 0.14 J
30 mm 21.14 km/h
(5.87 m/s)
 0.16 J
50 mm 21.17 km/h
(5.88 m/s)
 0.16 J
100 mm 21.18 km/h
(5.88 m/s)
 0.16 J
NdFeB products are prone to chipping – a strong collision with metal can result in shattering. Control the attraction moment – a neodymium left loose turns into a projectile. Impact energy can cause material chips or injury to skin. Be sure to control the product during installation so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when playing with large magnets.

Table 9: Coating parameters (durability)
MW 25x2.5 / 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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Pc)
MW 25x2.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 7 872 Mx 78.7 µWb
Pc Coefficient 0.16 Low (Flat)
Total magnetic flux emitted by the pole surface. Essential parameter in coil applications and motors. Pc value determines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 25x2.5 / N38

Environment Effective steel pull Effect
Air (land) 2.55 kg Standard
Water (riverbed) 2.92 kg
(+0.37 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Note: On a vertical surface, the magnet retains only a fraction of its nominal pull.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) significantly weakens the holding force.

3. Temperature resistance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.16

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.

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%

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: 010449-2026
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The offered product is an exceptionally strong cylinder magnet, manufactured from advanced NdFeB material, which, at dimensions of Ø25x2.5 mm, guarantees maximum efficiency. The MW 25x2.5 / N38 component features an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 2.55 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, 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 successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 25.03 N with a weight of only 9.2 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are suitable for 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø25x2.5), 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 Ø25x2.5 mm, which, at a weight of 9.2 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 2.55 kg (force ~25.03 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface 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 25 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.

Strengths and weaknesses of rare earth magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They retain full power for around 10 years – the loss is just ~1% (based on simulations),
  • They show high resistance to demagnetization induced by external field influence,
  • By using a smooth layer of gold, the element gains an professional look,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in forming and the capacity to adapt to complex applications,
  • Key role in innovative solutions – they are utilized in HDD drives, brushless drives, medical equipment, and complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Limitations

Problematic aspects of neodymium magnets and ways of using them
  • At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing nuts and complicated forms in magnets, we recommend using a housing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. 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 are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

The force parameter is a theoretical maximum value executed under the following configuration:
  • using a plate made of mild steel, serving as a ideal flux conductor
  • with a thickness no less than 10 mm
  • with a surface perfectly flat
  • with total lack of distance (without impurities)
  • under vertical force vector (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

Bear in mind that the working load will differ depending on the following factors, starting with the most relevant:
  • Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Base massiveness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be lost into the air.
  • Steel grade – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, 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 a perpendicular force was applied, in contrast under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet’s surface and the plate lowers the holding force.

Precautions when working with NdFeB magnets
Mechanical processing

Powder created during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.

Beware of splinters

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets will cause them shattering into shards.

Crushing force

Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Nickel allergy

Studies show that nickel (standard magnet coating) is a common allergen. For allergy sufferers, avoid touching magnets with bare hands or select versions in plastic housing.

Warning for heart patients

For implant holders: Strong magnetic fields affect medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.

Heat warning

Control the heat. Heating the magnet to high heat will ruin its properties and strength.

Magnetic media

Do not bring magnets near a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Impact on smartphones

GPS units and mobile phones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Handling rules

Be careful. Neodymium magnets attract from a long distance and snap with huge force, often faster than you can move away.

Danger to the youngest

Strictly keep magnets away from children. Risk of swallowing is significant, and the effects of magnets clamping inside the body are fatal.

Caution! Learn more about hazards in the article: Safety of working with magnets.