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MPL 40x18x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020156

GTIN/EAN: 5906301811626

5.00
Load capacity 23.81 kg / 233.58 N Magnetic Induction 366.66 mT / 3667 Gs
length
40 mm [±0,1 mm]
Width
18 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
54 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product parameters »

25.00 zł net / 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 of the product - MPL 40x18x10 / N38 - lamellar magnet

Specification / characteristics - MPL 40x18x10 / N38 - lamellar magnet

properties
properties values
Cat. no. 020156
GTIN/EAN 5906301811626
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 18 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 54 g
Magnetization Direction ↑ axial
Load capacity ~ ? 23.81 kg / 233.58 N
Magnetic Induction ~ ? 366.66 mT / 3667 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x18x10 / 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

Engineering simulation of the magnet - data

The following data are the direct effect of a physical calculation. Values rely on models for the material Nd2Fe14B. Real-world parameters may differ. Please consider these data as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs gap) - power drop
MPL 40x18x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3666 Gs
366.6 mT
 23.81 kg / 52.49 pounds
23810.0 g / 233.6 N
 crushing
1 mm 3399 Gs
339.9 mT
 20.48 kg / 45.14 pounds
20476.1 g / 200.9 N
 crushing
2 mm 3120 Gs
312.0 mT
 17.25 kg / 38.02 pounds
17245.9 g / 169.2 N
 crushing
3 mm 2841 Gs
284.1 mT
 14.30 kg / 31.54 pounds
14304.1 g / 140.3 N
 crushing
5 mm 2321 Gs
232.1 mT
 9.55 kg / 21.05 pounds
9547.8 g / 93.7 N
 strong
10 mm 1370 Gs
137.0 mT
 3.32 kg / 7.33 pounds
3324.4 g / 32.6 N
 strong
15 mm 833 Gs
83.3 mT
 1.23 kg / 2.71 pounds
1229.0 g / 12.1 N
 low risk
20 mm 530 Gs
53.0 mT
 0.50 kg / 1.10 pounds
498.1 g / 4.9 N
 low risk
30 mm 244 Gs
24.4 mT
 0.11 kg / 0.23 pounds
105.3 g / 1.0 N
 low risk
50 mm 75 Gs
7.5 mT
 0.01 kg / 0.02 pounds
9.9 g / 0.1 N
 low risk
Pulling power decreases sharply per each millimeter of distance. Keep in mind that every additional insulation layer (e.g., contamination, varnish, veneer) significantly reduces the pull force. Magnets work most effectively in perfect adhesion; gap weakens the power. Observe how quickly the parameters fall, when the magnet does not touch directly to the steel surface. When designing the mounting, eliminate unnecessary gaps.

Table 2: Slippage force (wall)
MPL 40x18x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 4.76 kg / 10.50 pounds
4762.0 g / 46.7 N
1 mm Stal (~0.2) 4.10 kg / 9.03 pounds
4096.0 g / 40.2 N
2 mm Stal (~0.2) 3.45 kg / 7.61 pounds
3450.0 g / 33.8 N
3 mm Stal (~0.2) 2.86 kg / 6.31 pounds
2860.0 g / 28.1 N
5 mm Stal (~0.2) 1.91 kg / 4.21 pounds
1910.0 g / 18.7 N
10 mm Stal (~0.2) 0.66 kg / 1.46 pounds
664.0 g / 6.5 N
15 mm Stal (~0.2) 0.25 kg / 0.54 pounds
246.0 g / 2.4 N
20 mm Stal (~0.2) 0.10 kg / 0.22 pounds
100.0 g / 1.0 N
30 mm Stal (~0.2) 0.02 kg / 0.05 pounds
22.0 g / 0.2 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
The table below presents the approximate shear load needed to start the slippage of the magnet vertically against a vertical metal surface (considering typical friction coefficient). The holding force depends on the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MPL 40x18x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
7.14 kg / 15.75 pounds
7143.0 g / 70.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
4.76 kg / 10.50 pounds
4762.0 g / 46.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
2.38 kg / 5.25 pounds
2381.0 g / 23.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
11.91 kg / 26.25 pounds
11905.0 g / 116.8 N
When mounting a magnet on a vertical plane (e.g., a car body), it will only hold barely about 20%-30% of its nominal power. Gravity and a low friction coefficient cause that products slip faster than they detach. Designing a vertical fastening? Note that the shear force is much weaker than the maximum static pull force. On a painted metal, the magnet will slide down under a noticeably lighter load. Utilizing a rubberized coating can drastically raise the stability.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 40x18x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 1.19 kg / 2.62 pounds
1190.5 g / 11.7 N
1 mm
13%
 2.98 kg / 6.56 pounds
2976.3 g / 29.2 N
2 mm
25%
 5.95 kg / 13.12 pounds
5952.5 g / 58.4 N
3 mm
38%
 8.93 kg / 19.68 pounds
8928.7 g / 87.6 N
5 mm
63%
 14.88 kg / 32.81 pounds
14881.3 g / 146.0 N
10 mm
100%
 23.81 kg / 52.49 pounds
23810.0 g / 233.6 N
11 mm
100%
 23.81 kg / 52.49 pounds
23810.0 g / 233.6 N
12 mm
100%
 23.81 kg / 52.49 pounds
23810.0 g / 233.6 N
A thin metal plate is unable to focus the entire magnetic field, which wastes potential of the magnet. If you install a neodymium to a too thin substrate, the flux will pass right through and the holding will be smaller. To achieve the maximum of this neodymium's potential, you need a suitably thick element of steel. The saturation effect causes that on sheet metal structures (e.g., thin profiles), the holder works worse. We recommend selecting the steel dimension from these parameters.

Table 5: Thermal stability (stability) - thermal limit
MPL 40x18x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 23.81 kg / 52.49 pounds
23810.0 g / 233.6 N
 OK
40 °C -2.2% 23.29 kg / 51.34 pounds
23286.2 g / 228.4 N
 OK
60 °C -4.4% 22.76 kg / 50.18 pounds
22762.4 g / 223.3 N
80 °C -6.6% 22.24 kg / 49.03 pounds
22238.5 g / 218.2 N
100 °C -28.8% 16.95 kg / 37.37 pounds
16952.7 g / 166.3 N
Standard neodymium magnets lose parameters past the thermal threshold. Watch out for overheating – high temperature can irreversibly damage this magnet. With increasing heat, the magnet's capacity momentarily lowers. Refrain from using this magnet close to ovens higher than its operating temperature limit. Exceeding the critical threshold will lead to permanent loss of magnetic properties.
*Engineering note: Thermal stability depends not only on the material grade, as well as the dimension ratios. Thin magnets (pancake types) risk losing magnetic properties sooner than long magnets. The danger warning in the table signals a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field collision
MPL 40x18x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 59.64 kg / 131.49 pounds
5 034 Gs
8.95 kg / 19.72 pounds
8947 g / 87.8 N
 N/A
1 mm 55.50 kg / 122.35 pounds
7 072 Gs
8.32 kg / 18.35 pounds
8325 g / 81.7 N
 49.95 kg / 110.12 pounds
~0 Gs
2 mm 51.29 kg / 113.08 pounds
6 799 Gs
7.69 kg / 16.96 pounds
7694 g / 75.5 N
 46.16 kg / 101.77 pounds
~0 Gs
3 mm 47.18 kg / 104.01 pounds
6 520 Gs
7.08 kg / 15.60 pounds
7076 g / 69.4 N
 42.46 kg / 93.61 pounds
~0 Gs
5 mm 39.41 kg / 86.88 pounds
5 959 Gs
5.91 kg / 13.03 pounds
5912 g / 58.0 N
 35.47 kg / 78.20 pounds
~0 Gs
10 mm 23.92 kg / 52.73 pounds
4 643 Gs
3.59 kg / 7.91 pounds
3588 g / 35.2 N
 21.53 kg / 47.46 pounds
~0 Gs
20 mm 8.33 kg / 18.36 pounds
2 739 Gs
1.25 kg / 2.75 pounds
1249 g / 12.3 N
 7.49 kg / 16.52 pounds
~0 Gs
50 mm 0.55 kg / 1.22 pounds
705 Gs
0.08 kg / 0.18 pounds
83 g / 0.8 N
 0.50 kg / 1.09 pounds
~0 Gs
60 mm 0.26 kg / 0.58 pounds
487 Gs
0.04 kg / 0.09 pounds
40 g / 0.4 N
 0.24 kg / 0.52 pounds
~0 Gs
70 mm 0.13 kg / 0.30 pounds
348 Gs
0.02 kg / 0.04 pounds
20 g / 0.2 N
 0.12 kg / 0.27 pounds
~0 Gs
80 mm 0.07 kg / 0.16 pounds
256 Gs
0.01 kg / 0.02 pounds
11 g / 0.1 N
 0.07 kg / 0.14 pounds
~0 Gs
90 mm 0.04 kg / 0.09 pounds
194 Gs
0.01 kg / 0.01 pounds
6 g / 0.1 N
 0.04 kg / 0.08 pounds
~0 Gs
100 mm 0.02 kg / 0.05 pounds
149 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
 0.02 kg / 0.05 pounds
~0 Gs
Two magnets attract each other from a wider radius than a magnet and sheet combination. Such a system of two magnets creates a more powerful interaction and a larger range of action. Want to build a solid fastener? Apply two magnets instead of a neodymium and a striker plate. Remember that when attracting two neodymiums, the collision energy is huge. The levitation is marginally weaker than the attraction, but still impressive.
*Flux density between like poles drops to ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Note: Figures show shear force of a pair of matching magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - warnings
MPL 40x18x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 14.0 cm
Hearing aid 10 Gs (1.0 mT) 11.0 cm
Timepiece 20 Gs (2.0 mT) 8.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 6.5 cm
Car key 50 Gs (5.0 mT) 6.0 cm
Payment card 400 Gs (40.0 mT) 2.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.0 cm
A strong magnetic field poses a real danger to electronics as well as medical implants. These neodymiums produce a flux that destroys function of digital equipment. Remember: the invisible magnetic field penetrates the body and plastic. Increased vigilance must be exercised by people with hearing aids and drug dispensers. The risk also applies to: automatic timepieces, remotes, speakers, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - collision effects
MPL 40x18x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.75 km/h
(6.32 m/s)
 1.08 J
30 mm 24.44 km/h
(6.79 m/s)
 1.24 J
50 mm 24.51 km/h
(6.81 m/s)
 1.25 J
100 mm 24.52 km/h
(6.81 m/s)
 1.25 J
Neodymium magnets are very brittle – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Impact energy can destroy the magnet or injury to fingers. Always hold the magnet during mounting so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h means shattering of the magnet. Wear safety glasses when handling with large magnets.

Table 9: Coating parameters (durability)
MPL 40x18x10 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Flux)
MPL 40x18x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 26 060 Mx 260.6 µWb
Pc Coefficient 0.43 Low (Flat)
Total magnetic flux emitted by the magnet pole. Key data for generator designers as well as sensors. The Pc coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MPL 40x18x10 / N38

Environment Effective steel pull Effect
Air (land) 23.81 kg Standard
Water (riverbed) 27.26 kg
(+3.45 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
In water, the magnet feels stronger thanks to Archimedes' principle. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

*Note: On a vertical wall, the magnet retains only approx. 20-30% of its max power.

2. Plate thickness effect

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.43

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

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%

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: 020156-2026
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This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 40x18x10 mm and a weight of 54 g, guarantees premium class connection. This magnetic block with a force of 233.58 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 23.81 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 40x18x10 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. They work great as fasteners under tiles, wood, or glass. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
For mounting flat magnets MPL 40x18x10 / N38, it is best to use strong epoxy glues (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
Standardly, the MPL 40x18x10 / N38 model is magnetized axially (dimension 10 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (40x18 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.
This model is characterized by dimensions 40x18x10 mm, which, at a weight of 54 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 40x18x10 mm and a self-weight of 54 g, ready to work at temperatures up to 80°C. The product meets the standards for N38 grade magnets.

Advantages and disadvantages of Nd2Fe14B magnets.

Advantages

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • They do not lose power, even during nearly 10 years – the drop in lifting capacity is only ~1% (according to tests),
  • They possess excellent resistance to magnetism drop when exposed to opposing magnetic fields,
  • By applying a shiny layer of gold, the element has an elegant look,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a distinguishing feature,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to flexibility in designing and the capacity to adapt to complex applications,
  • Key role in future technologies – they are commonly used in hard drives, electric drive systems, precision medical tools, as well as complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • Neodymium magnets lose their power 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
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in producing threads and complicated shapes in magnets, we propose using casing - magnetic mechanism.
  • Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Furthermore, tiny parts of these magnets can disrupt the diagnostic process medical after entering the body.
  • Due to neodymium price, their price is higher than average,

Lifting parameters

Maximum lifting capacity of the magnet – what affects it?

The specified lifting capacity refers to the peak performance, obtained under optimal environment, meaning:
  • with the contact of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • with a cross-section minimum 10 mm
  • with a surface perfectly flat
  • without the slightest air gap between the magnet and steel
  • during pulling in a direction vertical to the plane
  • in temp. approx. 20°C

Key elements affecting lifting force

In real-world applications, the actual lifting capacity is determined by many variables, ranked from crucial:
  • Air gap (betwixt the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Load vector – maximum parameter is obtained only during perpendicular pulling. The force required to slide of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Material composition – not every steel reacts the same. High carbon content worsen the attraction effect.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
  • Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate lowers the holding force.

Safe handling of NdFeB magnets
Pacemakers

For implant holders: Powerful magnets affect electronics. Keep at least 30 cm distance or request help to work with the magnets.

Fire risk

Machining of NdFeB material poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Nickel coating and allergies

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If an allergic reaction occurs, immediately stop working with magnets and wear gloves.

Swallowing risk

Absolutely store magnets out of reach of children. Risk of swallowing is high, and the effects of magnets connecting inside the body are life-threatening.

Magnet fragility

Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.

Caution required

Exercise caution. Neodymium magnets attract from a long distance and snap with massive power, often faster than you can react.

Finger safety

Danger of trauma: The pulling power is so great that it can cause blood blisters, crushing, and broken bones. Use thick gloves.

Keep away from computers

Do not bring magnets close to a wallet, computer, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Maximum temperature

Standard neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.

Precision electronics

Note: rare earth magnets generate a field that confuses sensitive sensors. Keep a separation from your phone, device, and GPS.

Danger! Need more info? Read our article: Why are neodymium magnets dangerous?