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MPL 30x5x5 / N38 - lamellar magnet

lamellar magnet

Catalog no 020448

GTIN/EAN: 5906301811923

Load capacity 7.03 kg / 68.94 N Magnetic Induction 446.27 mT / 4463 Gs
length
30 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
5.63 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product specifications »

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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 30x5x5 / N38 - lamellar magnet

Specification / characteristics - MPL 30x5x5 / N38 - lamellar magnet

properties
properties values
Cat. no. 020448
GTIN/EAN 5906301811923
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 30 mm [±0,1 mm]
Width 5 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 5.63 g
Magnetization Direction ↑ axial
Load capacity ~ ? 7.03 kg / 68.94 N
Magnetic Induction ~ ? 446.27 mT / 4463 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x5x5 / N38 - lamellar 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 magnet - data

These values constitute the direct effect of a physical simulation. Values were calculated on algorithms for the material Nd2Fe14B. Real-world performance may deviate from the simulation results. Use these calculations as a reference point during assembly planning.

Table 1: Static force (force vs distance) - power drop
MPL 30x5x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4458 Gs
445.8 mT
 7.03 kg / 15.50 LBS
7030.0 g / 69.0 N
 strong
1 mm 3235 Gs
323.5 mT
 3.70 kg / 8.16 LBS
3702.2 g / 36.3 N
 strong
2 mm 2271 Gs
227.1 mT
 1.82 kg / 4.02 LBS
1825.0 g / 17.9 N
 safe
3 mm 1628 Gs
162.8 mT
 0.94 kg / 2.07 LBS
937.0 g / 9.2 N
 safe
5 mm 927 Gs
92.7 mT
 0.30 kg / 0.67 LBS
304.2 g / 3.0 N
 safe
10 mm 342 Gs
34.2 mT
 0.04 kg / 0.09 LBS
41.4 g / 0.4 N
 safe
15 mm 166 Gs
16.6 mT
 0.01 kg / 0.02 LBS
9.7 g / 0.1 N
 safe
20 mm 92 Gs
9.2 mT
 0.00 kg / 0.01 LBS
3.0 g / 0.0 N
 safe
30 mm 36 Gs
3.6 mT
 0.00 kg / 0.00 LBS
0.5 g / 0.0 N
 safe
50 mm 9 Gs
0.9 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
Pulling power weakens significantly with every subsequent millimeter of distance. Keep in mind that even the smallest gap (e.g., contamination, paint, dust) strongly diminishes the holding power. Neodymiums operate optimally at the point of direct contact; air break nullifies the force. Analyze how rapidly the pull force drop, when the magnet does not adhere tightly to the metal substrate. When designing the mounting, avoid unnecessary gaps.

Table 2: Vertical force (wall)
MPL 30x5x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.41 kg / 3.10 LBS
1406.0 g / 13.8 N
1 mm Stal (~0.2) 0.74 kg / 1.63 LBS
740.0 g / 7.3 N
2 mm Stal (~0.2) 0.36 kg / 0.80 LBS
364.0 g / 3.6 N
3 mm Stal (~0.2) 0.19 kg / 0.41 LBS
188.0 g / 1.8 N
5 mm Stal (~0.2) 0.06 kg / 0.13 LBS
60.0 g / 0.6 N
10 mm Stal (~0.2) 0.01 kg / 0.02 LBS
8.0 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
The following data defines the approximate force sufficient to cause the shifting of the magnet downwards on a upright steel wall (considering standard friction). This value is relative to the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 30x5x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.11 kg / 4.65 LBS
2109.0 g / 20.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.41 kg / 3.10 LBS
1406.0 g / 13.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.70 kg / 1.55 LBS
703.0 g / 6.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.52 kg / 7.75 LBS
3515.0 g / 34.5 N
When mounting a element on a upright surface (e.g., a car body), it will maintain just approx. 20%-30% of nominal attraction strength. Gravity as well as a weak degree of grip mean that holders move down easier than they detach. Designing a vertical fastening? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a painted metal, the holder will give way down under a much lighter load. Using a rubber layer can effectively improve the result.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 30x5x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.70 kg / 1.55 LBS
703.0 g / 6.9 N
1 mm
25%
 1.76 kg / 3.87 LBS
1757.5 g / 17.2 N
2 mm
50%
 3.52 kg / 7.75 LBS
3515.0 g / 34.5 N
3 mm
75%
 5.27 kg / 11.62 LBS
5272.5 g / 51.7 N
5 mm
100%
 7.03 kg / 15.50 LBS
7030.0 g / 69.0 N
10 mm
100%
 7.03 kg / 15.50 LBS
7030.0 g / 69.0 N
11 mm
100%
 7.03 kg / 15.50 LBS
7030.0 g / 69.0 N
12 mm
100%
 7.03 kg / 15.50 LBS
7030.0 g / 69.0 N
A thin sheet is not enough to take in the full magnetic flux, which wastes potential of the magnet. Should you mount a strong magnet to a too thin substrate, the magnetism will pass right through and the attraction force will be weaker. To squeeze full efficiency of this neodymium's potential, you require a sufficiently solid backing of steel. The saturation phenomenon means that on thin elements (e.g., appliance housings), the magnet shows lower pull force. We advise picking the steel dimension from these parameters.

Table 5: Thermal resistance (stability) - thermal limit
MPL 30x5x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 7.03 kg / 15.50 LBS
7030.0 g / 69.0 N
 OK
40 °C -2.2% 6.88 kg / 15.16 LBS
6875.3 g / 67.4 N
 OK
60 °C -4.4% 6.72 kg / 14.82 LBS
6720.7 g / 65.9 N
80 °C -6.6% 6.57 kg / 14.48 LBS
6566.0 g / 64.4 N
100 °C -28.8% 5.01 kg / 11.03 LBS
5005.4 g / 49.1 N
Classic neodymiums change their properties parameters past the thermal threshold. Watch out for overheating – heat can permanently demagnetize this magnet. With every degree above norm, the neodymium's power briefly decreases. Do not use this magnet close to ovens higher than its safe range. Exceeding the critical threshold will lead to irreversible degradation of magnetism.
*Important note: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low Pc) are more susceptible to demagnetization sooner than long magnets. The danger warning in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - field collision
MPL 30x5x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 18.38 kg / 40.52 LBS
5 383 Gs
2.76 kg / 6.08 LBS
2757 g / 27.0 N
 N/A
1 mm 13.60 kg / 29.99 LBS
7 670 Gs
2.04 kg / 4.50 LBS
2040 g / 20.0 N
 12.24 kg / 26.99 LBS
~0 Gs
2 mm 9.68 kg / 21.34 LBS
6 470 Gs
1.45 kg / 3.20 LBS
1452 g / 14.2 N
 8.71 kg / 19.20 LBS
~0 Gs
3 mm 6.79 kg / 14.97 LBS
5 419 Gs
1.02 kg / 2.25 LBS
1018 g / 10.0 N
 6.11 kg / 13.47 LBS
~0 Gs
5 mm 3.39 kg / 7.48 LBS
3 830 Gs
0.51 kg / 1.12 LBS
509 g / 5.0 N
 3.05 kg / 6.73 LBS
~0 Gs
10 mm 0.80 kg / 1.75 LBS
1 855 Gs
0.12 kg / 0.26 LBS
119 g / 1.2 N
 0.72 kg / 1.58 LBS
~0 Gs
20 mm 0.11 kg / 0.24 LBS
684 Gs
0.02 kg / 0.04 LBS
16 g / 0.2 N
 0.10 kg / 0.21 LBS
~0 Gs
50 mm 0.00 kg / 0.01 LBS
111 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
72 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
70 mm 0.00 kg / 0.00 LBS
49 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
80 mm 0.00 kg / 0.00 LBS
34 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
25 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
19 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two magnets attract each other from a much further distance than a magnet and steel combination. Such a system of magnet-to-magnet creates a more powerful interaction and a larger range of action. Want to build a strong closure? Apply two magnets instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the impact force is huge. The levitation is marginally weaker than the attraction, but still impressive.
*The magnetic induction between like poles reaches ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Important: Figures refer to friction force of dual identical magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Hazards (electronics) - precautionary measures
MPL 30x5x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.5 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Timepiece 20 Gs (2.0 mT) 4.0 cm
Mobile device 40 Gs (4.0 mT) 3.0 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Extremely neodym field is a large risk to electronic devices and pacemakers. These NdFeB products generate a field that prevents correct functioning of digital equipment. Be aware: the invisible magnetic field penetrates the body and housings. Special caution must be exercised by people with hearing aids and insulin pumps. Also at risk are: automatic timepieces, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MPL 30x5x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.26 km/h
(6.18 m/s)
 0.11 J
30 mm 22.40 km/h
(6.22 m/s)
 0.11 J
50 mm 22.40 km/h
(6.22 m/s)
 0.11 J
100 mm 22.41 km/h
(6.22 m/s)
 0.11 J
NdFeB products are delicate – a collision with steel causes immediate chipping. Watch the impact speed – a neodymium left loose becomes dangerous. Kinetic force can cause material chips or painful pinches to skin. Hold the magnet firmly during bringing near metal so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Use safety goggles when handling with powerful specimens.

Table 9: Anti-corrosion coating durability
MPL 30x5x5 / 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: Electrical data (Pc)
MPL 30x5x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 700 Mx 57.0 µWb
Pc Coefficient 0.46 Low (Flat)
Total magnetic flux emitted by the magnet pole. Key data in coil applications as well as sensors. Pc value determines the magnet's operating point.

Table 11: Physics of underwater searching
MPL 30x5x5 / N38

Environment Effective steel pull Effect
Air (land) 7.03 kg Standard
Water (riverbed) 8.05 kg
(+1.02 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!
In water, the magnet feels stronger thanks to Archimedes' principle. Buoyancy helps in lifting finds.

1. Shear force

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

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) drastically limits the holding force.

3. Temperature resistance

*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) = 0.46

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

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: 020448-2026
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This product is an extremely strong plate magnet made of NdFeB material, which, with dimensions of 30x5x5 mm and a weight of 5.63 g, guarantees premium class connection. As a magnetic bar with high power (approx. 7.03 kg), this product is available off-the-shelf from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, giving it an aesthetic appearance.
The key to success is shifting 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 30x5x5 / 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. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
Plate magnets MPL 30x5x5 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as invisible mounts under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
For mounting flat magnets MPL 30x5x5 / N38, it is best to use strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Remember to roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. 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: 30 mm (length), 5 mm (width), and 5 mm (thickness). The key parameter here is the lifting capacity amounting to approximately 7.03 kg (force ~68.94 N), which, with such a flat shape, proves the high power of the material. The product meets the standards for N38 grade magnets.

Strengths and weaknesses of Nd2Fe14B magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over nearly ten years their performance decreases symbolically – ~1% (according to theory),
  • They feature excellent resistance to magnetic field loss due to opposing magnetic fields,
  • Thanks to the glossy finish, the layer of Ni-Cu-Ni, gold, or silver-plated gives an elegant appearance,
  • Neodymium magnets generate maximum magnetic induction on a small area, which increases force concentration,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
  • In view of the ability of precise forming and customization to unique solutions, magnetic components can be produced in a broad palette of shapes and sizes, which increases their versatility,
  • Universal use in innovative solutions – they find application in hard drives, motor assemblies, diagnostic systems, and multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Problematic aspects of neodymium magnets and proposals for their use:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of making nuts in the magnet and complex forms - preferred is a housing - mounting mechanism.
  • Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
  • Due to expensive raw materials, their price is higher than average,

Lifting parameters

Maximum holding power of the magnet – what it depends on?

Magnet power is the result of a measurement for ideal contact conditions, including:
  • on a base made of mild steel, perfectly concentrating the magnetic flux
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • characterized by smoothness
  • with direct contact (no coatings)
  • under perpendicular force direction (90-degree angle)
  • in stable room temperature

Practical aspects of lifting capacity – factors

During everyday use, the real power depends on several key aspects, listed from crucial:
  • Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Plate thickness – too thin sheet does not close the flux, causing part of the power to be escaped to the other side.
  • Steel grade – ideal substrate is high-permeability steel. Stainless steels may have worse magnetic properties.
  • Surface finish – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

Warnings
Operating temperature

Keep cool. Neodymium magnets are sensitive to heat. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Magnetic media

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

This is not a toy

These products are not toys. Eating a few magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates urgent medical intervention.

Conscious usage

Before starting, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Medical implants

Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

GPS and phone interference

A strong magnetic field interferes with the operation of magnetometers in smartphones and navigation systems. Maintain magnets close to a device to avoid breaking the sensors.

Bodily injuries

Pinching hazard: The pulling power is so great that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.

Avoid contact if allergic

Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness happens, immediately stop working with magnets and use protective gear.

Dust is flammable

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

Shattering risk

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

Warning! Need more info? Check our post: Are neodymium magnets dangerous?