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MW 40x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010066

GTIN/EAN: 5906301810650

Load capacity 27.73 kg / 271.99 N Magnetic Induction 277.22 mT / 2772 Gs
Diameter Ø
40 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
94.25 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

check properties »

29.73 zł net / pcs

36.57 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

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 - MW 40x10 / N38 - cylindrical magnet

Specification / characteristics - MW 40x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010066
GTIN/EAN 5906301810650
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 10 mm [±0,1 mm]
Weight 94.25 g
Magnetization Direction ↑ axial
Load capacity ~ ? 27.73 kg / 271.99 N
Magnetic Induction ~ ? 277.22 mT / 2772 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 40x10 / 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

Technical analysis of the product - data

Presented data constitute the outcome of a physical analysis. Values rely on models for the class Nd2Fe14B. Operational parameters may deviate from the simulation results. Use these data as a reference point when designing systems.

Table 1: Static force (force vs distance) - interaction chart
MW 40x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2772 Gs
277.2 mT
 27.73 kg / 61.13 lbs
27730.0 g / 272.0 N
 dangerous!
1 mm 2678 Gs
267.8 mT
 25.89 kg / 57.08 lbs
25889.6 g / 254.0 N
 dangerous!
2 mm 2573 Gs
257.3 mT
 23.89 kg / 52.68 lbs
23893.3 g / 234.4 N
 dangerous!
3 mm 2459 Gs
245.9 mT
 21.83 kg / 48.12 lbs
21827.6 g / 214.1 N
 dangerous!
5 mm 2216 Gs
221.6 mT
 17.73 kg / 39.08 lbs
17728.1 g / 173.9 N
 dangerous!
10 mm 1611 Gs
161.1 mT
 9.37 kg / 20.66 lbs
9371.0 g / 91.9 N
 warning
15 mm 1121 Gs
112.1 mT
 4.54 kg / 10.01 lbs
4538.6 g / 44.5 N
 warning
20 mm 775 Gs
77.5 mT
 2.17 kg / 4.77 lbs
2165.8 g / 21.2 N
 warning
30 mm 387 Gs
38.7 mT
 0.54 kg / 1.19 lbs
539.8 g / 5.3 N
 weak grip
50 mm 125 Gs
12.5 mT
 0.06 kg / 0.12 lbs
56.6 g / 0.6 N
 weak grip
Pulling power decreases sharply with every subsequent millimeter of distance. Remember that every additional insulation layer (e.g., contamination, varnish, veneer) strongly reduces the pull force. Magnetic products work optimally in perfect adhesion; distance nullifies the power. Analyze how quickly the parameters fall, when the magnet does not adhere tightly to the metal substrate. When calculating the arrangement, avoid redundant distances.

Table 2: Vertical hold (wall)
MW 40x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 5.55 kg / 12.23 lbs
5546.0 g / 54.4 N
1 mm Stal (~0.2) 5.18 kg / 11.42 lbs
5178.0 g / 50.8 N
2 mm Stal (~0.2) 4.78 kg / 10.53 lbs
4778.0 g / 46.9 N
3 mm Stal (~0.2) 4.37 kg / 9.63 lbs
4366.0 g / 42.8 N
5 mm Stal (~0.2) 3.55 kg / 7.82 lbs
3546.0 g / 34.8 N
10 mm Stal (~0.2) 1.87 kg / 4.13 lbs
1874.0 g / 18.4 N
15 mm Stal (~0.2) 0.91 kg / 2.00 lbs
908.0 g / 8.9 N
20 mm Stal (~0.2) 0.43 kg / 0.96 lbs
434.0 g / 4.3 N
30 mm Stal (~0.2) 0.11 kg / 0.24 lbs
108.0 g / 1.1 N
50 mm Stal (~0.2) 0.01 kg / 0.03 lbs
12.0 g / 0.1 N
This section shows the approximate force necessary to initiate the sliding of the magnet downwards against a vertical steel plate (assuming typical friction). This parameter is a function of the gap size between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 40x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
8.32 kg / 18.34 lbs
8319.0 g / 81.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
5.55 kg / 12.23 lbs
5546.0 g / 54.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
2.77 kg / 6.11 lbs
2773.0 g / 27.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
13.87 kg / 30.57 lbs
13865.0 g / 136.0 N
When hanging a element on a vertical surface (e.g., a board), it will only hold just approx. 1/5 of nominal attraction strength. Gravity and a weak degree of grip cause that holders move down easier than they pop off the substrate. Designing a wall mount? Consider that the sliding force is significantly lower than the maximum static pull force. On a painted metal, the holder will give way down under a significantly smaller load. Using a rubber layer can significantly improve the result.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 40x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 1.39 kg / 3.06 lbs
1386.5 g / 13.6 N
1 mm
13%
 3.47 kg / 7.64 lbs
3466.3 g / 34.0 N
2 mm
25%
 6.93 kg / 15.28 lbs
6932.5 g / 68.0 N
3 mm
38%
 10.40 kg / 22.93 lbs
10398.8 g / 102.0 N
5 mm
63%
 17.33 kg / 38.21 lbs
17331.3 g / 170.0 N
10 mm
100%
 27.73 kg / 61.13 lbs
27730.0 g / 272.0 N
11 mm
100%
 27.73 kg / 61.13 lbs
27730.0 g / 272.0 N
12 mm
100%
 27.73 kg / 61.13 lbs
27730.0 g / 272.0 N
A thin metal plate is unable to take in the full magnetic flux, which squanders power of the magnet. Should you mount a strong magnet to a thin surface, the magnetism will penetrate right through and the attraction force will be weaker. To squeeze the maximum of this magnet's potential, you require a sufficiently solid backing of steel. The saturation effect causes that on delicate walls (e.g., appliance housings), the magnet shows lower pull force. We advise picking the steel thickness based on the following data.

Table 5: Thermal resistance (stability) - power drop
MW 40x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 27.73 kg / 61.13 lbs
27730.0 g / 272.0 N
 OK
40 °C -2.2% 27.12 kg / 59.79 lbs
27119.9 g / 266.0 N
 OK
60 °C -4.4% 26.51 kg / 58.44 lbs
26509.9 g / 260.1 N
80 °C -6.6% 25.90 kg / 57.10 lbs
25899.8 g / 254.1 N
100 °C -28.8% 19.74 kg / 43.53 lbs
19743.8 g / 193.7 N
Standard neodymium magnets change their properties strength past the thermal threshold. Watch out for overheating – excessive heat can permanently demagnetize this magnet. With every degree above norm, the neodymium's power temporarily lowers. Refrain from using this magnet close to heaters higher than its operating temperature limit. Too high temperature will cause irreversible degradation of magnetic properties.
*Important note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures compared to rod magnets. The danger warning in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MW 40x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 59.52 kg / 131.22 lbs
4 382 Gs
8.93 kg / 19.68 lbs
8928 g / 87.6 N
 N/A
1 mm 57.61 kg / 127.01 lbs
5 454 Gs
8.64 kg / 19.05 lbs
8642 g / 84.8 N
 51.85 kg / 114.31 lbs
~0 Gs
2 mm 55.57 kg / 122.52 lbs
5 357 Gs
8.34 kg / 18.38 lbs
8336 g / 81.8 N
 50.01 kg / 110.26 lbs
~0 Gs
3 mm 53.46 kg / 117.85 lbs
5 254 Gs
8.02 kg / 17.68 lbs
8019 g / 78.7 N
 48.11 kg / 106.07 lbs
~0 Gs
5 mm 49.08 kg / 108.20 lbs
5 034 Gs
7.36 kg / 16.23 lbs
7362 g / 72.2 N
 44.17 kg / 97.38 lbs
~0 Gs
10 mm 38.05 kg / 83.89 lbs
4 433 Gs
5.71 kg / 12.58 lbs
5708 g / 56.0 N
 34.25 kg / 75.50 lbs
~0 Gs
20 mm 20.11 kg / 44.35 lbs
3 223 Gs
3.02 kg / 6.65 lbs
3017 g / 29.6 N
 18.10 kg / 39.91 lbs
~0 Gs
50 mm 2.27 kg / 5.01 lbs
1 083 Gs
0.34 kg / 0.75 lbs
341 g / 3.3 N
 2.05 kg / 4.51 lbs
~0 Gs
60 mm 1.16 kg / 2.55 lbs
773 Gs
0.17 kg / 0.38 lbs
174 g / 1.7 N
 1.04 kg / 2.30 lbs
~0 Gs
70 mm 0.62 kg / 1.36 lbs
565 Gs
0.09 kg / 0.20 lbs
93 g / 0.9 N
 0.56 kg / 1.23 lbs
~0 Gs
80 mm 0.35 kg / 0.76 lbs
422 Gs
0.05 kg / 0.11 lbs
52 g / 0.5 N
 0.31 kg / 0.69 lbs
~0 Gs
90 mm 0.20 kg / 0.44 lbs
322 Gs
0.03 kg / 0.07 lbs
30 g / 0.3 N
 0.18 kg / 0.40 lbs
~0 Gs
100 mm 0.12 kg / 0.27 lbs
251 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
 0.11 kg / 0.24 lbs
~0 Gs
Two magnetic products attract each other from a much further distance than a magnet and steel setup. The setup of magnet-to-magnet creates a more powerful interaction and a larger range of performance. Designing a solid fastener? Apply two magnets instead of a neodymium and a steel. Remember that when attracting two neodymiums, the pinch force is extreme. The levitation is marginally weaker than the attraction, but still impressive.
*Field value for N-N configuration is approximately ~0 Gs at the midpoint of the gap (resulting from vector opposition).
Important: Calculations demonstrate friction force of two matching neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - precautionary measures
MW 40x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 16.5 cm
Hearing aid 10 Gs (1.0 mT) 13.0 cm
Timepiece 20 Gs (2.0 mT) 10.5 cm
Mobile device 40 Gs (4.0 mT) 8.0 cm
Car key 50 Gs (5.0 mT) 7.5 cm
Payment card 400 Gs (40.0 mT) 3.0 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm
Powerful magnet radiation is a serious hazard to IT equipment as well as medical implants. These magnets produce a flux that disrupts operation of digital equipment. Remember: the invisible magnetic field acts through matter and glass. Increased vigilance must be taken by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, remotes, speakers, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MW 40x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.06 km/h
(6.13 m/s)
 1.77 J
30 mm 25.52 km/h
(7.09 m/s)
 2.37 J
50 mm 25.74 km/h
(7.15 m/s)
 2.41 J
100 mm 25.77 km/h
(7.16 m/s)
 2.41 J
Neodymium magnets are delicate – a collision with steel causes immediate chipping. Watch the impact speed – a neodymium left loose becomes dangerous. Impact energy can destroy the magnet or painful pinches to fingers. Always hold the magnet during bringing near metal 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 eye protection when working with large magnets.

Table 9: Corrosion resistance
MW 40x10 / 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)
MW 40x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 38 700 Mx 387.0 µWb
Pc Coefficient 0.35 Low (Flat)
Total magnetic flux passing through the magnet pole. Key data in coil applications as well as sensors. The Pc coefficient defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 40x10 / N38

Environment Effective steel pull Effect
Air (land) 27.73 kg Standard
Water (riverbed) 31.75 kg
(+4.02 kg buoyancy gain)
+14.5%
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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Wall mount (shear)

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

2. Steel thickness impact

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

3. Heat tolerance

*For N38 grade, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.35

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 specification and ecology

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%

Environmental data

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: 010066-2026
Measurement Calculator

Force (pull)

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The offered product is an incredibly powerful cylinder magnet, made from durable NdFeB material, which, with dimensions of Ø40x10 mm, guarantees the highest energy density. This specific item is characterized by high dimensional repeatability and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 27.73 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 271.99 N with a weight of only 94.25 g, this rod is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 40.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø40x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 40 mm and height 10 mm. The key parameter here is the holding force amounting to approximately 27.73 kg (force ~271.99 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 10 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Pros as well as cons of Nd2Fe14B magnets.

Pros

Besides their immense field intensity, neodymium magnets offer the following advantages:
  • They do not lose strength, even during approximately ten years – the drop in lifting capacity is only ~1% (according to tests),
  • Magnets very well protect themselves against demagnetization caused by external fields,
  • The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to present itself better,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures reaching 230°C and above...
  • Possibility of detailed shaping and adjusting to precise applications,
  • Significant place in high-tech industry – they find application in computer drives, motor assemblies, precision medical tools, as well as complex engineering applications.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Limitations

Disadvantages of neodymium magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • 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 stability even at temperatures up to 230°C
  • When exposed to humidity, magnets usually rust. To use them in conditions 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 producing threads in the magnet and complicated shapes - preferred is cover - magnet mounting.
  • Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can complicate diagnosis medical in case of swallowing.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

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

The declared magnet strength represents the peak performance, recorded under laboratory conditions, specifically:
  • using a base made of high-permeability steel, functioning as a circuit closing element
  • whose thickness reaches at least 10 mm
  • with an polished touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • for force acting at a right angle (in the magnet axis)
  • at standard ambient temperature

Magnet lifting force in use – key factors

Please note that the application force may be lower subject to elements below, starting with the most relevant:
  • Distance (betwixt the magnet and the plate), since even a microscopic distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Material type – the best choice is high-permeability steel. Hardened steels may attract less.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal weaken the grip.
  • Thermal factor – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Precautions when working with NdFeB magnets
Heat sensitivity

Keep cool. NdFeB magnets are susceptible to heat. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Threat to electronics

Avoid bringing magnets close to a purse, computer, or TV. The magnetic field can destroy these devices and erase data from cards.

Allergic reactions

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness appears, cease working with magnets and use protective gear.

Adults only

Only for adults. Tiny parts can be swallowed, leading to intestinal necrosis. Store away from children and animals.

Fragile material

NdFeB magnets are sintered ceramics, meaning they are very brittle. Clashing of two magnets leads to them cracking into small pieces.

Serious injuries

Danger of trauma: The pulling power is so great that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.

Respect the power

Before starting, read the rules. Sudden snapping can break the magnet or hurt your hand. Be predictive.

Flammability

Powder produced during machining of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Precision electronics

Be aware: neodymium magnets produce a field that confuses sensitive sensors. Keep a separation from your mobile, device, and GPS.

Implant safety

Individuals with a ICD should maintain an large gap from magnets. The magnetic field can disrupt the operation of the implant.

Security! Looking for details? Read our article: Are neodymium magnets dangerous?