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MPL 40x15x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020153

GTIN/EAN: 5906301811596

5.00
Load capacity 11.35 kg / 111.37 N Magnetic Induction 249.11 mT / 2491 Gs
length
40 mm [±0,1 mm]
Width
15 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
22.5 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
product parameters »

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7.63 zł with VAT (23% VAT) / pcs

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Frequently asked questions

How much will a block magnet really hold?
The catalogue force is measured in full contact with smooth steel at least 10 mm thick, pulled perpendicular, at about 20 °C. On 1 mm sheet about 50% of that value remains, on 0.5 mm about 25%. Mounted on a vertical wall the realistic figure is 20–30%, because the load is then in shear rather than in tension.
What is the maximum working temperature?
Standard N-series grades up to 80 °C, and N50, N52 and N54 up to 60 °C. Above the maximum working temperature the loss stops being reversible. The Curie temperature, at which magnetic properties are lost completely, is about 310 °C.
What safety factor should I allow?
At least twice the mass of the item, and three to five times for vertical mounting. The margin covers sheet thickness, surface condition, any layer of paint or rust, and vibration.

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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Technical details - MPL 40x15x5 / N38 - lamellar magnet

Specification / characteristics - MPL 40x15x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020153
GTIN/EAN 5906301811596
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
length 40 mm [±0,1 mm]
Width 15 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 22.5 g
Magnetization Direction ↑ axial
Load capacity ~ ? 11.35 kg / 111.37 N
Magnetic Induction ~ ? 249.11 mT / 2491 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x15x5 / N38 - lamellar 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 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

Engineering analysis of the assembly - technical parameters

Presented information are the outcome of a engineering calculation. Results were calculated on algorithms for the class Nd2Fe14B. Real-world conditions may deviate from the simulation results. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs distance) - characteristics
MPL 40x15x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2490 Gs
249.0 mT
 11.35 kg / 25.02 lbs
11350.0 g / 111.3 N
 dangerous!
1 mm 2306 Gs
230.6 mT
 9.73 kg / 21.45 lbs
9731.3 g / 95.5 N
 medium risk
2 mm 2095 Gs
209.5 mT
 8.03 kg / 17.70 lbs
8028.8 g / 78.8 N
 medium risk
3 mm 1877 Gs
187.7 mT
 6.45 kg / 14.21 lbs
6445.4 g / 63.2 N
 medium risk
5 mm 1472 Gs
147.2 mT
 3.97 kg / 8.74 lbs
3965.1 g / 38.9 N
 medium risk
10 mm 792 Gs
79.2 mT
 1.15 kg / 2.53 lbs
1147.1 g / 11.3 N
 low risk
15 mm 454 Gs
45.4 mT
 0.38 kg / 0.83 lbs
376.9 g / 3.7 N
 low risk
20 mm 278 Gs
27.8 mT
 0.14 kg / 0.31 lbs
141.4 g / 1.4 N
 low risk
30 mm 122 Gs
12.2 mT
 0.03 kg / 0.06 lbs
27.0 g / 0.3 N
 low risk
50 mm 35 Gs
3.5 mT
 0.00 kg / 0.01 lbs
2.3 g / 0.0 N
 low risk
Magnetic force drops significantly with every subsequent millimeter of spacing. Keep in mind that every additional insulation layer (e.g., contamination, varnish, rust) strongly diminishes the holding power. Magnets operate optimally at the point of direct contact; gap kills the power. Notice how quickly the parameters plummet, when the product does not adhere flatly to the steel surface. When calculating the mounting, avoid redundant distances.

Table 2: Slippage capacity (vertical surface)
MPL 40x15x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.27 kg / 5.00 lbs
2270.0 g / 22.3 N
1 mm Stal (~0.2) 1.95 kg / 4.29 lbs
1946.0 g / 19.1 N
2 mm Stal (~0.2) 1.61 kg / 3.54 lbs
1606.0 g / 15.8 N
3 mm Stal (~0.2) 1.29 kg / 2.84 lbs
1290.0 g / 12.7 N
5 mm Stal (~0.2) 0.79 kg / 1.75 lbs
794.0 g / 7.8 N
10 mm Stal (~0.2) 0.23 kg / 0.51 lbs
230.0 g / 2.3 N
15 mm Stal (~0.2) 0.08 kg / 0.17 lbs
76.0 g / 0.7 N
20 mm Stal (~0.2) 0.03 kg / 0.06 lbs
28.0 g / 0.3 N
30 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
The following data calculates the approximate shear load sufficient to start the slippage of the magnet vertically against a upright steel plate (assuming standard friction). The holding force is relative to the air gap between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
MPL 40x15x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
3.41 kg / 7.51 lbs
3405.0 g / 33.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.27 kg / 5.00 lbs
2270.0 g / 22.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.14 kg / 2.50 lbs
1135.0 g / 11.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
5.68 kg / 12.51 lbs
5675.0 g / 55.7 N
When hanging a holder on a upright wall (e.g., a fridge), it you can count on just approx. 1/5 of its nominal power. Gravitational force and a low friction coefficient cause that products slip easier than they detach. Planning a hanger? Note that the shear force is significantly lower than the perpendicular breakaway force. On a painted metal, the magnet will give way down under a much lighter weight. Application of an anti-slip pad can effectively raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MPL 40x15x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 0.57 kg / 1.25 lbs
567.5 g / 5.6 N
1 mm
13%
 1.42 kg / 3.13 lbs
1418.8 g / 13.9 N
2 mm
25%
 2.84 kg / 6.26 lbs
2837.5 g / 27.8 N
3 mm
38%
 4.26 kg / 9.38 lbs
4256.3 g / 41.8 N
5 mm
63%
 7.09 kg / 15.64 lbs
7093.8 g / 69.6 N
10 mm
100%
 11.35 kg / 25.02 lbs
11350.0 g / 111.3 N
11 mm
100%
 11.35 kg / 25.02 lbs
11350.0 g / 111.3 N
12 mm
100%
 11.35 kg / 25.02 lbs
11350.0 g / 111.3 N
A thin sheet is not enough to conduct the entire magnetic field, which weakens actual performance of the magnet. Should you install a neodymium to a thin surface, the field will penetrate right through and the pull force will drop sharply. To utilize 100% of this neodymium's potential, you require a sufficiently solid backing of metal. The saturation effect means that on thin elements (e.g., appliance housings), the magnet shows lower pull force. We suggest choosing the steel dimension based on the following data.

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 40x15x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 11.35 kg / 25.02 lbs
11350.0 g / 111.3 N
 OK
40 °C -2.2% 11.10 kg / 24.47 lbs
11100.3 g / 108.9 N
 OK
60 °C -4.4% 10.85 kg / 23.92 lbs
10850.6 g / 106.4 N
80 °C -6.6% 10.60 kg / 23.37 lbs
10600.9 g / 104.0 N
100 °C -28.8% 8.08 kg / 17.82 lbs
8081.2 g / 79.3 N
Ordinary NdFeB products lose strength past the thermal threshold. Avoid high temperatures – excessive heat can irreversibly destroy this product. With increasing heat, the neodymium's force momentarily decreases. Avoid using this product close to heaters exceeding its working range. Too high temperature will cause permanent loss of magnetic properties.
*Technical advisory: Thermal stability is determined by both grade, but also on the magnet's shape. Low-profile magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures compared to rod magnets. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MPL 40x15x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 22.94 kg / 50.58 lbs
3 961 Gs
3.44 kg / 7.59 lbs
3441 g / 33.8 N
 N/A
1 mm 21.37 kg / 47.11 lbs
4 807 Gs
3.21 kg / 7.07 lbs
3205 g / 31.4 N
 19.23 kg / 42.40 lbs
~0 Gs
2 mm 19.67 kg / 43.37 lbs
4 612 Gs
2.95 kg / 6.50 lbs
2951 g / 28.9 N
 17.70 kg / 39.03 lbs
~0 Gs
3 mm 17.94 kg / 39.55 lbs
4 404 Gs
2.69 kg / 5.93 lbs
2691 g / 26.4 N
 16.15 kg / 35.59 lbs
~0 Gs
5 mm 14.58 kg / 32.15 lbs
3 971 Gs
2.19 kg / 4.82 lbs
2187 g / 21.5 N
 13.12 kg / 28.93 lbs
~0 Gs
10 mm 8.01 kg / 17.67 lbs
2 944 Gs
1.20 kg / 2.65 lbs
1202 g / 11.8 N
 7.21 kg / 15.90 lbs
~0 Gs
20 mm 2.32 kg / 5.11 lbs
1 583 Gs
0.35 kg / 0.77 lbs
348 g / 3.4 N
 2.09 kg / 4.60 lbs
~0 Gs
50 mm 0.12 kg / 0.26 lbs
359 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
 0.11 kg / 0.24 lbs
~0 Gs
60 mm 0.05 kg / 0.12 lbs
243 Gs
0.01 kg / 0.02 lbs
8 g / 0.1 N
 0.05 kg / 0.11 lbs
~0 Gs
70 mm 0.03 kg / 0.06 lbs
171 Gs
0.00 kg / 0.01 lbs
4 g / 0.0 N
 0.02 kg / 0.05 lbs
~0 Gs
80 mm 0.01 kg / 0.03 lbs
124 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
 0.01 kg / 0.03 lbs
~0 Gs
90 mm 0.01 kg / 0.02 lbs
92 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.01 lbs
70 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two strong neodymiums attract each other from a wider radius than a neodymium and metal setup. Such a system of magnet-to-magnet creates a more powerful interaction and a further horizon of action. Designing a solid fastener? Apply two magnets instead of one magnet and a steel. Exercise caution that when attracting two neodymiums, the impact force is huge. The repulsion force is slightly lower than the attraction, but still impressive.
*Field value in repulsion mode is approximately ~0 Gs at the geometric center of the gap (resulting from vector opposition).
* Figures refer to friction force of two matching magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - precautionary measures
MPL 40x15x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 10.5 cm
Hearing aid 10 Gs (1.0 mT) 8.0 cm
Timepiece 20 Gs (2.0 mT) 6.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 5.0 cm
Car key 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
Extremely neodym field poses a serious hazard to electronics and pacemakers. These neodymiums produce a field that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation acts through matter and housings. Special caution must be taken by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, remotes, speakers, and displays. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MPL 40x15x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.36 km/h
(6.49 m/s)
 0.47 J
30 mm 24.60 km/h
(6.83 m/s)
 0.53 J
50 mm 24.64 km/h
(6.84 m/s)
 0.53 J
100 mm 24.65 km/h
(6.85 m/s)
 0.53 J
NdFeB products are prone to chipping – a violent impact against metal causes immediate chipping. Control the attraction moment – a magnet released freely becomes dangerous. Impact energy can trigger coating fragments or painful pinches to skin. Hold the magnet firmly during installation so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear eye protection when working with large magnets.

Table 9: Anti-corrosion coating durability
MPL 40x15x5 / 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)
The following table defines the conditions under which this product can be safely used. Note the thickness of the protective layer.

Table 10: Construction data (Pc)
MPL 40x15x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 14 969 Mx 149.7 µWb
Pc Coefficient 0.26 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: Physics of underwater searching
MPL 40x15x5 / N38

Environment Effective steel pull Effect
Air (land) 11.35 kg Standard
Water (riverbed) 13.00 kg
(+1.65 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Warning: On a vertical surface, the magnet retains just a fraction of its perpendicular strength.

2. Efficiency vs thickness

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

3. Thermal stability

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.26

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 and environmental data

Material specification

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: 020153-2026
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This product is an extremely strong plate magnet made of NdFeB material, which, with dimensions of 40x15x5 mm and a weight of 22.5 g, guarantees the highest quality connection. As a block magnet with high power (approx. 11.35 kg), this product is available off-the-shelf from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
The key to success is sliding the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. To separate the MPL 40x15x5 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 40x15x5 / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. Thanks to the flat surface and high force (approx. 11.35 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. In practice, this means that this magnet has the greatest attraction force on its main planes (40x15 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.
The presented product is a neodymium magnet with precisely defined parameters: 40 mm (length), 15 mm (width), and 5 mm (thickness). It is a magnetic block with dimensions 40x15x5 mm and a self-weight of 22.5 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Pros and cons of Nd2Fe14B magnets.

Strengths

Besides their durability, neodymium magnets are valued for these benefits:
  • They do not lose power, even over approximately ten years – the decrease in strength is only ~1% (based on measurements),
  • They maintain their magnetic properties even under strong external field,
  • By using a lustrous layer of nickel, the element gains an nice look,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of precise forming as well as optimizing to complex conditions,
  • Key role in electronics industry – they find application in magnetic memories, brushless drives, precision medical tools, as well as industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Cons of neodymium magnets: application proposals
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We recommend a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex forms.
  • Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, tiny parts of these magnets can complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum lifting force for a neodymium magnet – what affects it?

The declared magnet strength concerns the limit force, measured under ideal test conditions, namely:
  • using a base made of low-carbon steel, functioning as a circuit closing element
  • whose transverse dimension equals approx. 10 mm
  • characterized by lack of roughness
  • with total lack of distance (no coatings)
  • under perpendicular force vector (90-degree angle)
  • in stable room temperature

Magnet lifting force in use – key factors

Please note that the working load will differ influenced by the following factors, in order of importance:
  • Distance (betwixt the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Load vector – maximum parameter is available only during perpendicular pulling. The force required to slide of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material type – ideal substrate is pure iron steel. Cast iron may attract less.
  • Smoothness – full contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
  • Thermal factor – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was assessed by applying a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate reduces the lifting capacity.

Precautions when working with NdFeB magnets
Flammability

Dust produced during grinding of magnets is combustible. Do not drill into magnets unless you are an expert.

Do not give to children

Product intended for adults. Small elements pose a choking risk, leading to severe trauma. Keep out of reach of kids and pets.

Impact on smartphones

Be aware: rare earth magnets produce a field that disrupts precision electronics. Keep a separation from your mobile, device, and GPS.

Handling guide

Exercise caution. Neodymium magnets act from a long distance and connect with massive power, often faster than you can move away.

Warning for heart patients

Patients with a pacemaker should maintain an large gap from magnets. The magnetism can interfere with the operation of the life-saving device.

Protective goggles

Beware of splinters. Magnets can explode upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Physical harm

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

Permanent damage

Regular neodymium magnets (grade N) lose power when the temperature surpasses 80°C. This process is irreversible.

Nickel allergy

Studies show that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, avoid direct skin contact and choose versions in plastic housing.

Electronic hazard

Data protection: Strong magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, mechanical watches).

Security! Need more info? Read our article: Are neodymium magnets dangerous?