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MPL 40x5x3 / N38 - lamellar magnet

lamellar magnet

Catalog no 020402

GTIN/EAN: 5906301811916

Load capacity 7.33 kg / 71.91 N Magnetic Induction 348.83 mT / 3488 Gs
length
40 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
4.5 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

technical specifications »

5.41 zł net / pcs

6.65 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 40x5x3 / N38 - lamellar magnet

Specification / characteristics - MPL 40x5x3 / N38 - lamellar magnet

properties
properties values
Cat. no. 020402
GTIN/EAN 5906301811916
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 5 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 4.5 g
Magnetization Direction ↑ axial
Load capacity ~ ? 7.33 kg / 71.91 N
Magnetic Induction ~ ? 348.83 mT / 3488 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x5x3 / 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 - report

The following information are the outcome of a engineering calculation. Values were calculated on algorithms for the class Nd2Fe14B. Operational parameters may deviate from the simulation results. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs distance) - interaction chart
MPL 40x5x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3485 Gs
348.5 mT
 7.33 kg / 16.16 pounds
7330.0 g / 71.9 N
 warning
1 mm 2529 Gs
252.9 mT
 3.86 kg / 8.51 pounds
3859.9 g / 37.9 N
 warning
2 mm 1741 Gs
174.1 mT
 1.83 kg / 4.03 pounds
1829.7 g / 17.9 N
 weak grip
3 mm 1217 Gs
121.7 mT
 0.89 kg / 1.97 pounds
893.7 g / 8.8 N
 weak grip
5 mm 664 Gs
66.4 mT
 0.27 kg / 0.59 pounds
265.9 g / 2.6 N
 weak grip
10 mm 235 Gs
23.5 mT
 0.03 kg / 0.07 pounds
33.5 g / 0.3 N
 weak grip
15 mm 116 Gs
11.6 mT
 0.01 kg / 0.02 pounds
8.2 g / 0.1 N
 weak grip
20 mm 67 Gs
6.7 mT
 0.00 kg / 0.01 pounds
2.7 g / 0.0 N
 weak grip
30 mm 27 Gs
2.7 mT
 0.00 kg / 0.00 pounds
0.5 g / 0.0 N
 weak grip
50 mm 8 Gs
0.8 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
Magnetic force drops significantly with every subsequent millimeter of distance. Keep in mind that even the smallest gap (e.g., dirt, varnish, veneer) strongly diminishes the holding power. Neodymiums work strongest at the point of direct contact; air break kills the power. See how flashily the parameters drop, when the product does not touch directly to the steel surface. When designing the mounting, discard redundant distances.

Table 2: Sliding hold (vertical surface)
MPL 40x5x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.47 kg / 3.23 pounds
1466.0 g / 14.4 N
1 mm Stal (~0.2) 0.77 kg / 1.70 pounds
772.0 g / 7.6 N
2 mm Stal (~0.2) 0.37 kg / 0.81 pounds
366.0 g / 3.6 N
3 mm Stal (~0.2) 0.18 kg / 0.39 pounds
178.0 g / 1.7 N
5 mm Stal (~0.2) 0.05 kg / 0.12 pounds
54.0 g / 0.5 N
10 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
This section calculates the estimated shear load required to initiate the sliding of the magnet downwards against a upright metal surface (assuming standard friction coefficient). This parameter depends on the gap size between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 40x5x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.20 kg / 4.85 pounds
2199.0 g / 21.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.47 kg / 3.23 pounds
1466.0 g / 14.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.73 kg / 1.62 pounds
733.0 g / 7.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.67 kg / 8.08 pounds
3665.0 g / 36.0 N
When placing a holder on a upright wall (e.g., a fridge), it you can count on barely about 1/5 of its nominal power. Gravitational force and a low friction coefficient cause that magnets move down faster than they detach. Planning a hanger? Consider that the sliding force is noticeably lower than the perpendicular breakaway force. On a painted metal, the element will slip down under a much lighter weight. Utilizing a rubberized pad can drastically improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 40x5x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.73 kg / 1.62 pounds
733.0 g / 7.2 N
1 mm
25%
 1.83 kg / 4.04 pounds
1832.5 g / 18.0 N
2 mm
50%
 3.67 kg / 8.08 pounds
3665.0 g / 36.0 N
3 mm
75%
 5.50 kg / 12.12 pounds
5497.5 g / 53.9 N
5 mm
100%
 7.33 kg / 16.16 pounds
7330.0 g / 71.9 N
10 mm
100%
 7.33 kg / 16.16 pounds
7330.0 g / 71.9 N
11 mm
100%
 7.33 kg / 16.16 pounds
7330.0 g / 71.9 N
12 mm
100%
 7.33 kg / 16.16 pounds
7330.0 g / 71.9 N
A too thin steel cannot focus the entire magnetic field, which weakens actual performance of the magnet. If you mount a strong magnet to a thin surface, the flux will penetrate right through and the attraction force will be weaker. To squeeze the maximum of this neodymium's power, you need a suitably thick backing of metal. The saturation effect means that on sheet metal structures (e.g., thin profiles), the product works worse. We recommend selecting the steel dimension according to the table below.

Table 5: Thermal stability (material behavior) - power drop
MPL 40x5x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 7.33 kg / 16.16 pounds
7330.0 g / 71.9 N
 OK
40 °C -2.2% 7.17 kg / 15.80 pounds
7168.7 g / 70.3 N
 OK
60 °C -4.4% 7.01 kg / 15.45 pounds
7007.5 g / 68.7 N
80 °C -6.6% 6.85 kg / 15.09 pounds
6846.2 g / 67.2 N
100 °C -28.8% 5.22 kg / 11.51 pounds
5219.0 g / 51.2 N
Classic neodymiums irreversibly lose parameters above the temperature limit. Watch out for overheating – high temperature can permanently destroy this product. With increasing heat, the magnet's capacity momentarily lowers. Do not use this product near heat sources exceeding its safe range. Ignoring the limit will lead to irreversible degradation of magnetism.
*Important note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (pancake types) are more susceptible to demagnetization sooner compared to rod magnets. Red status in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - field range
MPL 40x5x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 14.97 kg / 33.01 pounds
4 697 Gs
2.25 kg / 4.95 pounds
2246 g / 22.0 N
 N/A
1 mm 11.16 kg / 24.61 pounds
6 017 Gs
1.67 kg / 3.69 pounds
1674 g / 16.4 N
 10.04 kg / 22.15 pounds
~0 Gs
2 mm 7.88 kg / 17.38 pounds
5 058 Gs
1.18 kg / 2.61 pounds
1183 g / 11.6 N
 7.10 kg / 15.64 pounds
~0 Gs
3 mm 5.44 kg / 11.99 pounds
4 201 Gs
0.82 kg / 1.80 pounds
816 g / 8.0 N
 4.90 kg / 10.79 pounds
~0 Gs
5 mm 2.59 kg / 5.71 pounds
2 899 Gs
0.39 kg / 0.86 pounds
389 g / 3.8 N
 2.33 kg / 5.14 pounds
~0 Gs
10 mm 0.54 kg / 1.20 pounds
1 328 Gs
0.08 kg / 0.18 pounds
81 g / 0.8 N
 0.49 kg / 1.08 pounds
~0 Gs
20 mm 0.07 kg / 0.15 pounds
471 Gs
0.01 kg / 0.02 pounds
10 g / 0.1 N
 0.06 kg / 0.14 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
83 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
55 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
38 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
27 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
20 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
15 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two magnetic products interact from a significantly greater distance than a neodymium and metal setup. Such a system of two magnets generates a stronger field and a further horizon of action. Want to build a solid fastener? Apply two magnets instead of a neodymium and a steel. Be careful that when bringing together two magnets, the pinch force is extreme. The repulsion force is a bit weaker than the connection force, but still large.
*Field value in repulsion mode reaches ~0 Gs in the exact middle of the gap (due to field cancellation).
Important: Results demonstrate friction force of a pair of matching neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (implants) - warnings
MPL 40x5x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 3.0 cm
Remote 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Extremely neodym field is a serious hazard to IT equipment as well as medical implants. These neodymiums produce a field that disrupts operation of digital equipment. Remember: the invisible magnetic field passes through tissues and plastic. Exceptional care must be taken by people with hearing aids and insulin pumps. Also at risk are: automatic timepieces, remotes, speakers, and displays. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - collision effects
MPL 40x5x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 25.03 km/h
(6.95 m/s)
 0.11 J
30 mm 25.17 km/h
(6.99 m/s)
 0.11 J
50 mm 25.16 km/h
(6.99 m/s)
 0.11 J
100 mm 25.17 km/h
(6.99 m/s)
 0.11 J
Magnetic elements are delicate – a collision with steel risks their cracking. Control the attraction moment – a magnet released freely speeds with massive force. Kinetic force can cause material chips or dangerous crushing to fingers. Always hold the magnet during installation so it doesn't slam with momentum against the steel surface. A collision at high speed ends with a crack of the magnet. Use safety goggles when handling with powerful specimens.

Table 9: Coating parameters (durability)
MPL 40x5x3 / 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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MPL 40x5x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 123 Mx 51.2 µWb
Pc Coefficient 0.27 Low (Flat)
Flux value emitted by the pole surface. Key data for generator designers and motors. The Pc coefficient determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MPL 40x5x3 / N38

Environment Effective steel pull Effect
Air (land) 7.33 kg Standard
Water (riverbed) 8.39 kg
(+1.06 kg buoyancy gain)
+14.5%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Wall mount (shear)

*Note: On a vertical wall, the magnet retains just ~20% of its perpendicular strength.

2. Steel saturation

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

3. Temperature resistance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.27

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical and environmental data

Elemental analysis

iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%

Sustainability

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 020402-2026
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Model MPL 40x5x3 / N38 features a flat shape and professional pulling force, making it an ideal solution for building separators and machines. As a magnetic bar with high power (approx. 7.33 kg), this product is available immediately from our warehouse in Poland. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
Separating strong flat 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 7.33 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
They constitute a key element in the production of generators and material handling systems. 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 40x5x3 / N38, we recommend utilizing two-component adhesives (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.
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 (40x5 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 40x5x3 mm, which, at a weight of 4.5 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 40x5x3 mm and a self-weight of 4.5 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths as well as weaknesses of rare earth magnets.

Benefits

Besides their immense field intensity, neodymium magnets offer the following advantages:
  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
  • They do not lose their magnetic properties even under close interference source,
  • A magnet with a smooth silver surface has an effective appearance,
  • Magnetic induction on the working layer of the magnet remains extremely intense,
  • 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...
  • In view of the ability of precise molding and customization to specialized requirements, magnetic components can be created in a variety of geometric configurations, which increases their versatility,
  • Fundamental importance in innovative solutions – they are utilized in hard drives, electric drive systems, medical equipment, and modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited ability of making nuts in the magnet and complicated forms - preferred is casing - mounting mechanism.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Holding force characteristics

Magnetic strength at its maximum – what affects it?

The lifting capacity listed is a theoretical maximum value conducted under specific, ideal conditions:
  • on a block made of structural steel, perfectly concentrating the magnetic flux
  • whose thickness equals approx. 10 mm
  • characterized by even structure
  • under conditions of no distance (surface-to-surface)
  • during pulling in a direction perpendicular to the mounting surface
  • in neutral thermal conditions

Practical lifting capacity: influencing factors

It is worth knowing that the application force will differ subject to the following factors, in order of importance:
  • Space between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the flux to be wasted into the air.
  • Chemical composition of the base – mild steel gives the best results. Alloy steels decrease magnetic properties and lifting capacity.
  • Base smoothness – the more even the surface, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal environment – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a slight gap between the magnet and the plate lowers the load capacity.

Warnings
Powerful field

Be careful. Neodymium magnets act from a long distance and connect with huge force, often faster than you can react.

Heat warning

Regular neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Allergy Warning

It is widely known that nickel (the usual finish) is a common allergen. If your skin reacts to metals, prevent direct skin contact or opt for encased magnets.

Threat to navigation

Note: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your mobile, tablet, and GPS.

Finger safety

Protect your hands. Two powerful magnets will snap together instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Danger to the youngest

Adult use only. Tiny parts can be swallowed, leading to serious injuries. Store away from kids and pets.

Flammability

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

Cards and drives

Data protection: Neodymium magnets can damage payment cards and sensitive devices (heart implants, hearing aids, timepieces).

Implant safety

People with a ICD must keep an large gap from magnets. The magnetism can interfere with the functioning of the implant.

Magnets are brittle

Watch out for shards. Magnets can explode upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Danger! Learn more about risks in the article: Safety of working with magnets.