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MW 40x30 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010068

GTIN/EAN: 5906301810674

5.00
Load capacity 54.73 kg / 536.88 N Magnetic Induction 515.71 mT / 5157 Gs
Diameter Ø
40 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
282.74 g
Magnetization Direction
→ diametrical
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

see parameters »

85.20 zł net / pcs

104.80 zł with VAT (23% VAT) / pcs

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Frequently asked questions

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

Guides from the knowledge base

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Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical - MW 40x30 / N38 - cylindrical magnet

Specification / characteristics - MW 40x30 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010068
GTIN/EAN 5906301810674
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 40 mm [±0,1 mm]
Height 30 mm [±0,1 mm]
Weight 282.74 g
Magnetization Direction → diametrical
Load capacity ~ ? 54.73 kg / 536.88 N
Magnetic Induction ~ ? 515.71 mT / 5157 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 40x30 / N38 - cylindrical magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 310 °C
Curie Temperature TF 590 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Physical analysis of the assembly - report

These values constitute the direct effect of a physical simulation. Values rely on models for the material Nd2Fe14B. Operational conditions may differ from theoretical values. Treat these data as a supplementary guide during assembly planning.

Table 1: Static pull force (force vs distance) - interaction chart
MW 40x30 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5156 Gs
515.6 mT
 54.73 kg / 120.66 lbs
54730.0 g / 536.9 N
 critical level
1 mm 4900 Gs
490.0 mT
 49.43 kg / 108.98 lbs
49432.0 g / 484.9 N
 critical level
2 mm 4641 Gs
464.1 mT
 44.33 kg / 97.74 lbs
44334.0 g / 434.9 N
 critical level
3 mm 4383 Gs
438.3 mT
 39.54 kg / 87.17 lbs
39538.7 g / 387.9 N
 critical level
5 mm 3879 Gs
387.9 mT
 30.98 kg / 68.30 lbs
30981.5 g / 303.9 N
 critical level
10 mm 2773 Gs
277.3 mT
 15.83 kg / 34.89 lbs
15826.7 g / 155.3 N
 critical level
15 mm 1946 Gs
194.6 mT
 7.79 kg / 17.18 lbs
7792.9 g / 76.4 N
 medium risk
20 mm 1372 Gs
137.2 mT
 3.88 kg / 8.55 lbs
3877.9 g / 38.0 N
 medium risk
30 mm 723 Gs
72.3 mT
 1.08 kg / 2.37 lbs
1076.5 g / 10.6 N
 low risk
50 mm 258 Gs
25.8 mT
 0.14 kg / 0.30 lbs
137.4 g / 1.3 N
 low risk
Grip strength decreases sharply with every mm of spacing. Note that even a microscopic distance (e.g., dirt, varnish, rust) noticeably reduces the pull force. Magnets operate most effectively during direct contact; gap nullifies the power. Analyze how flashily the parameters drop, when the magnet does not adhere flatly to the metal substrate. When designing the arrangement, avoid redundant distances.

Table 2: Slippage load (wall)
MW 40x30 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 10.95 kg / 24.13 lbs
10946.0 g / 107.4 N
1 mm Stal (~0.2) 9.89 kg / 21.79 lbs
9886.0 g / 97.0 N
2 mm Stal (~0.2) 8.87 kg / 19.55 lbs
8866.0 g / 87.0 N
3 mm Stal (~0.2) 7.91 kg / 17.43 lbs
7908.0 g / 77.6 N
5 mm Stal (~0.2) 6.20 kg / 13.66 lbs
6196.0 g / 60.8 N
10 mm Stal (~0.2) 3.17 kg / 6.98 lbs
3166.0 g / 31.1 N
15 mm Stal (~0.2) 1.56 kg / 3.43 lbs
1558.0 g / 15.3 N
20 mm Stal (~0.2) 0.78 kg / 1.71 lbs
776.0 g / 7.6 N
30 mm Stal (~0.2) 0.22 kg / 0.48 lbs
216.0 g / 2.1 N
50 mm Stal (~0.2) 0.03 kg / 0.06 lbs
28.0 g / 0.3 N
The following data calculates the theoretical weight limit necessary to initiate the sliding of the magnet vertically on a vertical metal surface (assuming typical friction coefficient). This parameter is a function of the air gap between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 40x30 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
16.42 kg / 36.20 lbs
16419.0 g / 161.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
10.95 kg / 24.13 lbs
10946.0 g / 107.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
5.47 kg / 12.07 lbs
5473.0 g / 53.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
27.37 kg / 60.33 lbs
27365.0 g / 268.5 N
When placing a element on a vertical wall (e.g., a board), it you can count on just approx. 20%-30% of nominal attraction strength. Gravity and a weak degree of grip mean that magnets move down easier than they detach. Designing a vertical fastening? Consider that the shear force is much weaker than the maximum static pull force. On a painted metal, the magnet will give way down under a significantly smaller cargo. Using a rubber coating can drastically improve the result.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 40x30 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
 1.82 kg / 4.02 lbs
1824.3 g / 17.9 N
1 mm
8%
 4.56 kg / 10.05 lbs
4560.8 g / 44.7 N
2 mm
17%
 9.12 kg / 20.11 lbs
9121.7 g / 89.5 N
3 mm
25%
 13.68 kg / 30.16 lbs
13682.5 g / 134.2 N
5 mm
42%
 22.80 kg / 50.27 lbs
22804.2 g / 223.7 N
10 mm
83%
 45.61 kg / 100.55 lbs
45608.3 g / 447.4 N
11 mm
92%
 50.17 kg / 110.60 lbs
50169.2 g / 492.2 N
12 mm
100%
 54.73 kg / 120.66 lbs
54730.0 g / 536.9 N
A thin sheet is not enough to take in the full magnetic flux, which weakens actual performance of the holder. Should you attach a powerful product to a weak sheet, the magnetism will pass right through and the attraction force will be weaker. To squeeze 100% of this neodymium's power, you require a sufficiently solid element of steel. The saturation effect causes that on sheet metal structures (e.g., car bodies), the holder holds weaker. We advise picking the steel dimension based on the following data.

Table 5: Thermal stability (stability) - resistance threshold
MW 40x30 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 54.73 kg / 120.66 lbs
54730.0 g / 536.9 N
 OK
40 °C -2.2% 53.53 kg / 118.00 lbs
53525.9 g / 525.1 N
 OK
60 °C -4.4% 52.32 kg / 115.35 lbs
52321.9 g / 513.3 N
 OK
80 °C -6.6% 51.12 kg / 112.70 lbs
51117.8 g / 501.5 N
100 °C -28.8% 38.97 kg / 85.91 lbs
38967.8 g / 382.3 N
Standard neodymium magnets lose strength above the temperature limit. Avoid high temperatures – high temperature can irreversibly damage this magnet. With increasing heat, the neodymium's force briefly lowers. Avoid using this magnet close to ovens higher than its safe range. Exceeding the critical threshold will result in permanent loss of magnetic properties.
*Important note: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) may lose charge permanently under lower heat stress than long magnets. The danger warning in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - field collision
MW 40x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 205.97 kg / 454.08 lbs
5 879 Gs
30.89 kg / 68.11 lbs
30895 g / 303.1 N
 N/A
1 mm 195.99 kg / 432.09 lbs
10 060 Gs
29.40 kg / 64.81 lbs
29399 g / 288.4 N
 176.39 kg / 388.88 lbs
~0 Gs
2 mm 186.03 kg / 410.12 lbs
9 800 Gs
27.90 kg / 61.52 lbs
27904 g / 273.7 N
 167.42 kg / 369.11 lbs
~0 Gs
3 mm 176.30 kg / 388.68 lbs
9 541 Gs
26.45 kg / 58.30 lbs
26445 g / 259.4 N
 158.67 kg / 349.81 lbs
~0 Gs
5 mm 157.67 kg / 347.60 lbs
9 023 Gs
23.65 kg / 52.14 lbs
23650 g / 232.0 N
 141.90 kg / 312.84 lbs
~0 Gs
10 mm 116.59 kg / 257.04 lbs
7 759 Gs
17.49 kg / 38.56 lbs
17489 g / 171.6 N
 104.93 kg / 231.34 lbs
~0 Gs
20 mm 59.56 kg / 131.31 lbs
5 545 Gs
8.93 kg / 19.70 lbs
8934 g / 87.6 N
 53.60 kg / 118.18 lbs
~0 Gs
50 mm 7.52 kg / 16.58 lbs
1 971 Gs
1.13 kg / 2.49 lbs
1128 g / 11.1 N
 6.77 kg / 14.92 lbs
~0 Gs
60 mm 4.05 kg / 8.93 lbs
1 446 Gs
0.61 kg / 1.34 lbs
608 g / 6.0 N
 3.65 kg / 8.04 lbs
~0 Gs
70 mm 2.28 kg / 5.03 lbs
1 085 Gs
0.34 kg / 0.75 lbs
342 g / 3.4 N
 2.05 kg / 4.53 lbs
~0 Gs
80 mm 1.34 kg / 2.96 lbs
832 Gs
0.20 kg / 0.44 lbs
201 g / 2.0 N
 1.21 kg / 2.66 lbs
~0 Gs
90 mm 0.82 kg / 1.80 lbs
650 Gs
0.12 kg / 0.27 lbs
123 g / 1.2 N
 0.74 kg / 1.62 lbs
~0 Gs
100 mm 0.52 kg / 1.14 lbs
517 Gs
0.08 kg / 0.17 lbs
78 g / 0.8 N
 0.47 kg / 1.03 lbs
~0 Gs
Two strong neodymiums attract each other from a significantly greater distance than a neodymium and metal combination. The setup of two magnets creates a more powerful interaction and a wider radius of operation. Planning to create a powerful holder? Use a pair of magnets instead of one magnet and a steel. Exercise caution that when bringing together two magnets, the pinch force is huge. The levitation is slightly lower than the attraction, but still significant.
*Flux density for N-N configuration reaches ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Important: Estimates refer to shear force of a pair of identical neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 40x30 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 23.5 cm
Hearing aid 10 Gs (1.0 mT) 18.0 cm
Mechanical watch 20 Gs (2.0 mT) 14.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 11.0 cm
Car key 50 Gs (5.0 mT) 10.0 cm
Payment card 400 Gs (40.0 mT) 4.5 cm
HDD hard drive 600 Gs (60.0 mT) 3.5 cm
Extremely neodym field poses a real danger to electronics as well as pacemakers. These neodymiums produce a field that prevents correct functioning of sensitive medical devices. Be aware: the invisible magnetic field penetrates the body and plastic. Exceptional care must be exercised by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, remotes, speakers, and displays. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - warning
MW 40x30 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 17.09 km/h
(4.75 m/s)
 3.18 J
30 mm 19.68 km/h
(5.47 m/s)
 4.23 J
50 mm 19.88 km/h
(5.52 m/s)
 4.31 J
100 mm 19.92 km/h
(5.53 m/s)
 4.33 J
Neodymium magnets are prone to chipping – a strong collision with metal can result in shattering. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Kinetic force can destroy the magnet or painful pinches to fingers. Be sure to control the product during mounting so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear eye protection when working with large magnets.

Table 9: Surface protection spec
MW 40x30 / 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: Electrical data (Flux)
MW 40x30 / N38

Parameter Value SI Unit / Description
Magnetic Flux 65 488 Mx 654.9 µWb
Pc Coefficient 0.76 High (Stable)
Total magnetic flux emitted by the magnet pole. Essential parameter for generator designers as well as sensors. The Pc coefficient defines the working geometry.

Table 11: Submerged application
MW 40x30 / N38

Environment Effective steel pull Effect
Air (land) 54.73 kg Standard
Water (riverbed) 62.67 kg
(+7.94 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!
Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Note: On a vertical surface, the magnet holds merely ~20% of its perpendicular strength.

2. Plate thickness effect

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

3. Thermal stability

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.76

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

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: 010068-2026
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The presented product is an extremely powerful cylindrical magnet, composed of durable NdFeB material, which, at dimensions of Ø40x30 mm, guarantees maximum efficiency. The MW 40x30 / N38 model features high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 54.73 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 536.88 N with a weight of only 282.74 g, this rod is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø40x30), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 40 mm and height 30 mm. The value of 536.88 N means that the magnet is capable of holding a weight many times exceeding its own mass of 282.74 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 30 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Strengths as well as weaknesses of rare earth magnets.

Benefits

Apart from their strong magnetic energy, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
  • Magnets very well resist against loss of magnetization caused by foreign field sources,
  • A magnet with a shiny nickel surface is more attractive,
  • Magnets are characterized by huge magnetic induction on the surface,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in forming and the ability to adapt to complex applications,
  • Significant place in high-tech industry – they are commonly used in data components, electric drive systems, medical devices, and modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in compact constructions

Limitations

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • We suggest a housing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
  • Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. Furthermore, tiny parts of these devices are able to disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Information about lifting capacity was defined for the most favorable conditions, assuming:
  • with the contact of a sheet made of special test steel, ensuring maximum field concentration
  • with a thickness no less than 10 mm
  • with a plane perfectly flat
  • with zero gap (no coatings)
  • for force acting at a right angle (pull-off, not shear)
  • in neutral thermal conditions

Magnet lifting force in use – key factors

Holding efficiency impacted by working environment parameters, mainly (from most important):
  • Air gap (betwixt the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin steel causes magnetic saturation, causing part of the power to be escaped to the other side.
  • Chemical composition of the base – mild steel gives the best results. Alloy admixtures reduce magnetic properties and holding force.
  • Surface finish – ideal contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.

H&S for magnets
GPS Danger

Navigation devices and mobile phones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Thermal limits

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will destroy its properties and strength.

Choking Hazard

Adult use only. Small elements can be swallowed, causing serious injuries. Store out of reach of kids and pets.

Allergy Warning

Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness appears, cease handling magnets and wear gloves.

Medical implants

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Pinching danger

Pinching hazard: The pulling power is so immense that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.

Safe distance

Do not bring magnets close to a purse, computer, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Machining danger

Fire hazard: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Safe operation

Be careful. Rare earth magnets act from a distance and connect with huge force, often quicker than you can react.

Magnets are brittle

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them shattering into small pieces.

Attention! Looking for details? Read our article: Why are neodymium magnets dangerous?