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MW 25x12 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010502

GTIN/EAN: 5906301814986

5.00
Load capacity 19.60 kg / 192.25 N Magnetic Induction 429.18 mT / 4292 Gs
Diameter Ø
25 mm [±0,1 mm]
Height
12 mm [±0,1 mm]
Weight
44.18 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

see technical data »

13.53 zł net / pcs

16.64 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 - MW 25x12 / N38 - cylindrical magnet

Specification / characteristics - MW 25x12 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010502
GTIN/EAN 5906301814986
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 25 mm [±0,1 mm]
Height 12 mm [±0,1 mm]
Weight 44.18 g
Magnetization Direction ↑ axial
Load capacity ~ ? 19.60 kg / 192.25 N
Magnetic Induction ~ ? 429.18 mT / 4292 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 25x12 / 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 modeling of the product - technical parameters

The following information represent the result of a mathematical analysis. Results rely on models for the material Nd2Fe14B. Real-world performance may differ. Please consider these data as a reference point for designers.

Table 1: Static force (pull vs gap) - power drop
MW 25x12 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4291 Gs
429.1 mT
 19.60 kg / 43.21 LBS
19600.0 g / 192.3 N
 critical level
1 mm 3975 Gs
397.5 mT
 16.82 kg / 37.08 LBS
16820.5 g / 165.0 N
 critical level
2 mm 3645 Gs
364.5 mT
 14.15 kg / 31.19 LBS
14147.5 g / 138.8 N
 critical level
3 mm 3316 Gs
331.6 mT
 11.71 kg / 25.81 LBS
11707.5 g / 114.9 N
 critical level
5 mm 2692 Gs
269.2 mT
 7.72 kg / 17.02 LBS
7718.0 g / 75.7 N
 medium risk
10 mm 1518 Gs
151.8 mT
 2.45 kg / 5.41 LBS
2451.8 g / 24.1 N
 medium risk
15 mm 863 Gs
86.3 mT
 0.79 kg / 1.75 LBS
793.5 g / 7.8 N
 low risk
20 mm 517 Gs
51.7 mT
 0.29 kg / 0.63 LBS
285.1 g / 2.8 N
 low risk
30 mm 219 Gs
21.9 mT
 0.05 kg / 0.11 LBS
51.2 g / 0.5 N
 low risk
50 mm 63 Gs
6.3 mT
 0.00 kg / 0.01 LBS
4.2 g / 0.0 N
 low risk
Pulling power weakens significantly per each millimeter of gap. Keep in mind that every additional insulation layer (e.g., contamination, paint, dust) significantly diminishes the holding power. Neodymiums hold most effectively at the point of direct contact; gap kills the force. Notice how rapidly the parameters plummet, when the magnet does not adhere directly to the steel surface. When calculating the arrangement, eliminate additional spacers.

Table 2: Sliding force (wall)
MW 25x12 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 3.92 kg / 8.64 LBS
3920.0 g / 38.5 N
1 mm Stal (~0.2) 3.36 kg / 7.42 LBS
3364.0 g / 33.0 N
2 mm Stal (~0.2) 2.83 kg / 6.24 LBS
2830.0 g / 27.8 N
3 mm Stal (~0.2) 2.34 kg / 5.16 LBS
2342.0 g / 23.0 N
5 mm Stal (~0.2) 1.54 kg / 3.40 LBS
1544.0 g / 15.1 N
10 mm Stal (~0.2) 0.49 kg / 1.08 LBS
490.0 g / 4.8 N
15 mm Stal (~0.2) 0.16 kg / 0.35 LBS
158.0 g / 1.5 N
20 mm Stal (~0.2) 0.06 kg / 0.13 LBS
58.0 g / 0.6 N
30 mm Stal (~0.2) 0.01 kg / 0.02 LBS
10.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
The table below defines the approximate holding capacity sufficient to initiate the shifting of the magnet downwards along a upright steel wall (considering standard friction). This value depends on the distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 25x12 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
5.88 kg / 12.96 LBS
5880.0 g / 57.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
3.92 kg / 8.64 LBS
3920.0 g / 38.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.96 kg / 4.32 LBS
1960.0 g / 19.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
9.80 kg / 21.61 LBS
9800.0 g / 96.1 N
When placing a holder on a upright wall (e.g., a fridge), it you can count on barely approx. 20%-30% of its maximum pull force. Gravitational force as well as a low friction coefficient influence the fact that products move down easier than they pop off the substrate. Want to create a wall mount? Remember that the sliding force is much weaker than the perpendicular breakaway force. On a smooth steel, the magnet will slip down under a significantly smaller load. Utilizing a rubberized layer can significantly raise the stability.

Table 4: Material efficiency (saturation) - power losses
MW 25x12 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 0.98 kg / 2.16 LBS
980.0 g / 9.6 N
1 mm
13%
 2.45 kg / 5.40 LBS
2450.0 g / 24.0 N
2 mm
25%
 4.90 kg / 10.80 LBS
4900.0 g / 48.1 N
3 mm
38%
 7.35 kg / 16.20 LBS
7350.0 g / 72.1 N
5 mm
63%
 12.25 kg / 27.01 LBS
12250.0 g / 120.2 N
10 mm
100%
 19.60 kg / 43.21 LBS
19600.0 g / 192.3 N
11 mm
100%
 19.60 kg / 43.21 LBS
19600.0 g / 192.3 N
12 mm
100%
 19.60 kg / 43.21 LBS
19600.0 g / 192.3 N
A too thin steel is incapable of conduct the entire magnetic field, which wastes potential of the holder. Should you attach a powerful product to a too thin substrate, the magnetism will pass right through and the holding will be smaller. To achieve full efficiency of this neodymium's potential, you need a suitably thick backing of steel. The saturation phenomenon means that on thin elements (e.g., appliance housings), the magnet shows lower pull force. We suggest choosing the steel cross-section according to the table below.

Table 5: Thermal resistance (stability) - power drop
MW 25x12 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 19.60 kg / 43.21 LBS
19600.0 g / 192.3 N
 OK
40 °C -2.2% 19.17 kg / 42.26 LBS
19168.8 g / 188.0 N
 OK
60 °C -4.4% 18.74 kg / 41.31 LBS
18737.6 g / 183.8 N
80 °C -6.6% 18.31 kg / 40.36 LBS
18306.4 g / 179.6 N
100 °C -28.8% 13.96 kg / 30.77 LBS
13955.2 g / 136.9 N
Classic neodymiums irreversibly lose strength past the thermal threshold. Watch out for overheating – heat can permanently demagnetize this magnet. As the temperature rises, the magnet's power temporarily decreases. Avoid using this magnet near heat sources higher than its safe range. Exceeding the critical threshold will result in permanent loss of magnetic properties.
*Engineering note: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (low permeance coefficient) may lose charge permanently at lower temperatures than taller cylinders. Warning indicator in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 25x12 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 55.71 kg / 122.82 LBS
5 494 Gs
8.36 kg / 18.42 LBS
8357 g / 82.0 N
 N/A
1 mm 51.78 kg / 114.14 LBS
8 273 Gs
7.77 kg / 17.12 LBS
7766 g / 76.2 N
 46.60 kg / 102.73 LBS
~0 Gs
2 mm 47.81 kg / 105.40 LBS
7 949 Gs
7.17 kg / 15.81 LBS
7172 g / 70.4 N
 43.03 kg / 94.86 LBS
~0 Gs
3 mm 43.94 kg / 96.88 LBS
7 621 Gs
6.59 kg / 14.53 LBS
6592 g / 64.7 N
 39.55 kg / 87.19 LBS
~0 Gs
5 mm 36.65 kg / 80.80 LBS
6 960 Gs
5.50 kg / 12.12 LBS
5497 g / 53.9 N
 32.98 kg / 72.72 LBS
~0 Gs
10 mm 21.94 kg / 48.36 LBS
5 385 Gs
3.29 kg / 7.25 LBS
3291 g / 32.3 N
 19.74 kg / 43.53 LBS
~0 Gs
20 mm 6.97 kg / 15.36 LBS
3 035 Gs
1.05 kg / 2.30 LBS
1045 g / 10.3 N
 6.27 kg / 13.83 LBS
~0 Gs
50 mm 0.33 kg / 0.72 LBS
657 Gs
0.05 kg / 0.11 LBS
49 g / 0.5 N
 0.29 kg / 0.65 LBS
~0 Gs
60 mm 0.15 kg / 0.32 LBS
439 Gs
0.02 kg / 0.05 LBS
22 g / 0.2 N
 0.13 kg / 0.29 LBS
~0 Gs
70 mm 0.07 kg / 0.16 LBS
306 Gs
0.01 kg / 0.02 LBS
11 g / 0.1 N
 0.06 kg / 0.14 LBS
~0 Gs
80 mm 0.04 kg / 0.08 LBS
221 Gs
0.01 kg / 0.01 LBS
6 g / 0.1 N
 0.03 kg / 0.07 LBS
~0 Gs
90 mm 0.02 kg / 0.05 LBS
165 Gs
0.00 kg / 0.01 LBS
3 g / 0.0 N
 0.02 kg / 0.04 LBS
~0 Gs
100 mm 0.01 kg / 0.03 LBS
126 Gs
0.00 kg / 0.00 LBS
2 g / 0.0 N
 0.01 kg / 0.02 LBS
~0 Gs
Two strong neodymiums interact from a much further distance than a magnet and steel combination. The connection of magnet-to-magnet produces a massive flux and a wider radius of performance. Designing a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Exercise caution that when attracting two neodymiums, the collision energy is huge. The repulsion force is slightly lower than the connection force, but still large.
*Field value for N-N configuration is approximately ~0 Gs in the exact middle of the gap (due to field cancellation).
Attention: Estimates apply to shear force of two same magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Hazards (electronics) - warnings
MW 25x12 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 13.0 cm
Hearing aid 10 Gs (1.0 mT) 10.0 cm
Timepiece 20 Gs (2.0 mT) 8.0 cm
Mobile device 40 Gs (4.0 mT) 6.0 cm
Car key 50 Gs (5.0 mT) 5.5 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 is a serious hazard to IT equipment and medical implants. These magnets generate a field that destroys function of digital equipment. Be aware: the invisible magnetic field acts through matter and glass. Increased vigilance must be exercised by people with cochlear implants and insulin pumps. Also at risk are: automatic timepieces, car keys, membranes, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - warning
MW 25x12 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.62 km/h
(6.28 m/s)
 0.87 J
30 mm 23.99 km/h
(6.66 m/s)
 0.98 J
50 mm 24.03 km/h
(6.68 m/s)
 0.98 J
100 mm 24.04 km/h
(6.68 m/s)
 0.98 J
Magnetic elements are prone to chipping – a strong collision with metal causes immediate chipping. Control the attraction moment – a magnet released freely speeds with massive force. Impact energy can cause material chips or painful pinches to skin. Hold the magnet firmly during bringing near metal so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear eye protection when playing with large magnets.

Table 9: Surface protection spec
MW 25x12 / 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 following table defines the conditions under which this product can be safely used. Note the thickness of the protective layer.

Table 10: Electrical data (Pc)
MW 25x12 / N38

Parameter Value SI Unit / Description
Magnetic Flux 21 413 Mx 214.1 µWb
Pc Coefficient 0.57 Low (Flat)
Flux value emitted by the magnet pole. Essential parameter in coil applications and motors. The Pc coefficient determines the magnet's operating point.

Table 11: Submerged application
MW 25x12 / N38

Environment Effective steel pull Effect
Air (land) 19.60 kg Standard
Water (riverbed) 22.44 kg
(+2.84 kg buoyancy gain)
+14.5%
Rust risk: 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. Sliding resistance

*Caution: On a vertical surface, the magnet retains merely approx. 20-30% of its nominal pull.

2. Steel saturation

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

3. Temperature resistance

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.57

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.

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%

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: 010502-2026
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The presented product is an exceptionally strong cylinder magnet, produced from durable NdFeB material, which, with dimensions of Ø25x12 mm, guarantees optimal power. This specific item 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. 19.60 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 192.25 N with a weight of only 44.18 g, this rod is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are strong enough for the majority of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø25x12), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 25 mm and height 12 mm. The value of 192.25 N means that the magnet is capable of holding a weight many times exceeding its own mass of 44.18 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 25 mm. 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 through the diameter if your project requires it.

Advantages and disadvantages of rare earth magnets.

Strengths

Besides their high retention, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • Neodymium magnets are characterized by remarkably resistant to magnetic field loss caused by external interference,
  • Thanks to the smooth finish, the plating of Ni-Cu-Ni, gold-plated, or silver gives an aesthetic appearance,
  • Neodymium magnets create maximum magnetic induction on a contact point, which increases force concentration,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of custom shaping and adapting to atypical needs,
  • Key role in future technologies – they are used in hard drives, motor assemblies, precision medical tools, also multitasking production systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Cons

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets lose strength 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 suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Due to limitations in realizing nuts and complicated forms in magnets, we recommend using cover - magnetic mechanism.
  • Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products can be problematic in diagnostics medical after entering the body.
  • Due to expensive raw materials, their price is higher than average,

Holding force characteristics

Maximum holding power of the magnet – what affects it?

Information about lifting capacity was determined for ideal contact conditions, including:
  • using a base made of low-carbon steel, acting as a ideal flux conductor
  • with a cross-section of at least 10 mm
  • with an ground contact surface
  • without any insulating layer between the magnet and steel
  • under axial force direction (90-degree angle)
  • at ambient temperature room level

Practical aspects of lifting capacity – factors

Effective lifting capacity impacted by specific conditions, mainly (from priority):
  • Distance – the presence of foreign body (paint, tape, air) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Angle of force application – maximum parameter is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Material composition – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was assessed using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate lowers the holding force.

Safe handling of neodymium magnets
Respect the power

Handle magnets consciously. Their immense force can shock even professionals. Stay alert and do not underestimate their force.

Power loss in heat

Do not overheat. NdFeB magnets are sensitive to heat. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Threat to electronics

Very strong magnetic fields can erase data on credit cards, HDDs, and storage devices. Keep a distance of min. 10 cm.

No play value

These products are not toys. Swallowing several magnets may result in them attracting across intestines, which poses a critical condition and requires immediate surgery.

Combustion hazard

Fire warning: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

Warning for heart patients

Individuals with a pacemaker should maintain an large gap from magnets. The magnetism can interfere with the functioning of the life-saving device.

Crushing force

Big blocks can crush fingers in a fraction of a second. Do not place your hand between two strong magnets.

Warning for allergy sufferers

Studies show that nickel (standard magnet coating) is a potent allergen. If your skin reacts to metals, refrain from direct skin contact or choose versions in plastic housing.

Shattering risk

Watch out for shards. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Compass and GPS

A powerful magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets near a device to prevent breaking the sensors.

Safety First! Want to know more? Check our post: Are neodymium magnets dangerous?