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MW 4x4 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010076

GTIN/EAN: 5906301810759

5.00
Load capacity 0.51 kg / 4.96 N Magnetic Induction 552.79 mT / 5528 Gs
Diameter Ø
4 mm [±0,1 mm]
Height
4 mm [±0,1 mm]
Weight
0.38 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product specifications »

0.330 zł net / pcs

0.406 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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Product card - MW 4x4 / N38 - cylindrical magnet

Specification / characteristics - MW 4x4 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010076
GTIN/EAN 5906301810759
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 4 mm [±0,1 mm]
Height 4 mm [±0,1 mm]
Weight 0.38 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.51 kg / 4.96 N
Magnetic Induction ~ ? 552.79 mT / 5528 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 4x4 / 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

Engineering modeling of the product - technical parameters

Presented values are the result of a engineering calculation. Results rely on models for the material Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Please consider these data as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs distance) - characteristics
MW 4x4 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5517 Gs
551.7 mT
 0.51 kg / 1.12 pounds
510.0 g / 5.0 N
 low risk
1 mm 2984 Gs
298.4 mT
 0.15 kg / 0.33 pounds
149.2 g / 1.5 N
 low risk
2 mm 1498 Gs
149.8 mT
 0.04 kg / 0.08 pounds
37.6 g / 0.4 N
 low risk
3 mm 803 Gs
80.3 mT
 0.01 kg / 0.02 pounds
10.8 g / 0.1 N
 low risk
5 mm 296 Gs
29.6 mT
 0.00 kg / 0.00 pounds
1.5 g / 0.0 N
 low risk
10 mm 58 Gs
5.8 mT
 0.00 kg / 0.00 pounds
0.1 g / 0.0 N
 low risk
15 mm 20 Gs
2.0 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
20 mm 9 Gs
0.9 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
30 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
50 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
Magnetic force decreases sharply per each millimeter of spacing. Keep in mind that even the smallest gap (e.g., contamination, paint, veneer) significantly weakens the grip. Magnets work strongest at the point of direct contact; distance nullifies the power. Analyze how rapidly the load capacity fall, when the product does not adhere flatly to the metal substrate. When calculating the mounting, avoid unnecessary gaps.

Table 2: Shear capacity (vertical surface)
MW 4x4 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.10 kg / 0.22 pounds
102.0 g / 1.0 N
1 mm Stal (~0.2) 0.03 kg / 0.07 pounds
30.0 g / 0.3 N
2 mm Stal (~0.2) 0.01 kg / 0.02 pounds
8.0 g / 0.1 N
3 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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 shows the approximate weight limit sufficient to initiate the shifting of the magnet down on a upright metal surface (assuming standard friction coefficient). This parameter depends on the distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - vertical pull
MW 4x4 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.15 kg / 0.34 pounds
153.0 g / 1.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.10 kg / 0.22 pounds
102.0 g / 1.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.05 kg / 0.11 pounds
51.0 g / 0.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.26 kg / 0.56 pounds
255.0 g / 2.5 N
When hanging a element on a upright plane (e.g., a car body), it you can count on just approx. 20%-30% of nominal attraction strength. Gravity as well as a weak degree of grip mean that holders move down easier than they pull off. Planning a vertical fastening? Note that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the holder will slide down under a much lighter load. Application of an anti-slip pad can significantly raise the stability.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 4x4 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.05 kg / 0.11 pounds
51.0 g / 0.5 N
1 mm
25%
 0.13 kg / 0.28 pounds
127.5 g / 1.3 N
2 mm
50%
 0.26 kg / 0.56 pounds
255.0 g / 2.5 N
3 mm
75%
 0.38 kg / 0.84 pounds
382.5 g / 3.8 N
5 mm
100%
 0.51 kg / 1.12 pounds
510.0 g / 5.0 N
10 mm
100%
 0.51 kg / 1.12 pounds
510.0 g / 5.0 N
11 mm
100%
 0.51 kg / 1.12 pounds
510.0 g / 5.0 N
12 mm
100%
 0.51 kg / 1.12 pounds
510.0 g / 5.0 N
A thin metal plate cannot focus the full magnetic flux, which squanders power of the holder. Should you attach a powerful product to a weak sheet, the field will penetrate right through and the holding will be smaller. To achieve the maximum of this magnet's potential, you need a suitably thick backing of metal. The saturation effect means that on thin elements (e.g., thin profiles), the holder shows lower pull force. We suggest choosing the steel dimension based on the following data.

Table 5: Thermal resistance (material behavior) - thermal limit
MW 4x4 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.51 kg / 1.12 pounds
510.0 g / 5.0 N
 OK
40 °C -2.2% 0.50 kg / 1.10 pounds
498.8 g / 4.9 N
 OK
60 °C -4.4% 0.49 kg / 1.07 pounds
487.6 g / 4.8 N
 OK
80 °C -6.6% 0.48 kg / 1.05 pounds
476.3 g / 4.7 N
100 °C -28.8% 0.36 kg / 0.80 pounds
363.1 g / 3.6 N
Classic neodymiums change their properties strength after exceeding the maximum temperature. Avoid high temperatures – excessive heat can irreversibly destroy this product. With every degree above norm, the neodymium's capacity briefly decreases. Refrain from using this product close to heaters exceeding its operating temperature limit. Exceeding the critical threshold will result in irreversible degradation of magnetic properties.
*Important note: Heat tolerance depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low permeance coefficient) risk losing magnetic properties sooner than long magnets. Warning indicator in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (repulsion) - field collision
MW 4x4 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.36 kg / 5.20 pounds
5 984 Gs
0.35 kg / 0.78 pounds
354 g / 3.5 N
 N/A
1 mm 1.34 kg / 2.96 pounds
8 324 Gs
0.20 kg / 0.44 pounds
201 g / 2.0 N
 1.21 kg / 2.66 pounds
~0 Gs
2 mm 0.69 kg / 1.52 pounds
5 968 Gs
0.10 kg / 0.23 pounds
103 g / 1.0 N
 0.62 kg / 1.37 pounds
~0 Gs
3 mm 0.34 kg / 0.76 pounds
4 213 Gs
0.05 kg / 0.11 pounds
52 g / 0.5 N
 0.31 kg / 0.68 pounds
~0 Gs
5 mm 0.09 kg / 0.20 pounds
2 169 Gs
0.01 kg / 0.03 pounds
14 g / 0.1 N
 0.08 kg / 0.18 pounds
~0 Gs
10 mm 0.01 kg / 0.01 pounds
592 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
20 mm 0.00 kg / 0.00 pounds
116 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
10 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
6 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
4 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
3 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
2 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
1 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two magnets interact from a much further distance than a magnet and steel setup. The connection of two magnets produces a massive flux and a larger range of operation. Planning to create a solid fastener? Utilize two neodymiums instead of a neodymium and a steel. Be careful that when connecting a pair of magnets, the impact force is extreme. The levitation is a bit weaker than the connection force, but still significant.
*Field value for N-N configuration is approximately ~0 Gs in the exact middle of the gap (due to field cancellation).
Attention: Calculations apply to shear force of dual matching magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - precautionary measures
MW 4x4 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.0 cm
Hearing aid 10 Gs (1.0 mT) 2.0 cm
Timepiece 20 Gs (2.0 mT) 2.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Remote 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
A strong magnetic field poses a real danger to electronic devices as well as medical implants. These neodymiums produce a flux that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation penetrates the body and housings. Special caution must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, remotes, membranes, and displays. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - warning
MW 4x4 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 16.71 km/h
(4.64 m/s)
 0.00 J
30 mm 16.71 km/h
(4.64 m/s)
 0.00 J
50 mm 16.71 km/h
(4.64 m/s)
 0.00 J
100 mm 16.71 km/h
(4.64 m/s)
 0.00 J
Neodymium magnets are prone to chipping – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Impact energy can destroy the magnet or painful pinches to fingers. Always hold the magnet during installation so it doesn't hit violently against the metal. A collision at high speed ends with a crack of the neodymium. Wear safety glasses when working with large magnets.

Table 9: Surface protection spec
MW 4x4 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MW 4x4 / N38

Parameter Value SI Unit / Description
Magnetic Flux 717 Mx 7.2 µWb
Pc Coefficient 0.89 High (Stable)
Flux value passing through the pole surface. Essential parameter for generator designers as well as sensors. The Pc coefficient determines the working geometry.

Table 11: Submerged application
MW 4x4 / N38

Environment Effective steel pull Effect
Air (land) 0.51 kg Standard
Water (riverbed) 0.58 kg
(+0.07 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. Buoyancy helps in lifting finds.

1. Shear force

*Caution: On a vertical surface, the magnet retains merely ~20% of its max power.

2. Efficiency vs thickness

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

3. Heat tolerance

*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) = 0.89

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

Material specification

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: 010076-2026
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This product is an exceptionally strong rod magnet, composed of advanced NdFeB material, which, at dimensions of Ø4x4 mm, guarantees the highest energy density. The MW 4x4 / N38 model is characterized by an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.51 kg), this product is available off-the-shelf 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, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 4.96 N with a weight of only 0.38 g, this rod is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 4.1 mm) using two-component epoxy glues. To ensure stability in industry, 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 even stronger magnets in the same volume (Ø4x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
This model is characterized by dimensions Ø4x4 mm, which, at a weight of 0.38 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 0.51 kg (force ~4.96 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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 4 mm. 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.

Advantages and disadvantages of rare earth magnets.

Pros

Besides their immense pulling force, neodymium magnets offer the following advantages:
  • They have constant strength, and over nearly ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They maintain their magnetic properties even under strong external field,
  • By applying a decorative coating of silver, the element acquires an aesthetic look,
  • They show high magnetic induction at the operating surface, which improves attraction properties,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Thanks to versatility in forming and the ability to adapt to complex applications,
  • Huge importance in modern technologies – they are used in HDD drives, electric drive systems, medical devices, as well as complex engineering applications.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Limitations

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • At strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • Due to limitations in creating nuts and complicated forms in magnets, we propose using a housing - magnetic mechanism.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these products can disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

Information about lifting capacity is the result of a measurement for optimal configuration, assuming:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • possessing a thickness of min. 10 mm to avoid saturation
  • characterized by lack of roughness
  • under conditions of ideal adhesion (surface-to-surface)
  • during detachment in a direction perpendicular to the mounting surface
  • in temp. approx. 20°C

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the working load will differ influenced by elements below, starting with the most relevant:
  • Distance (between the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
  • Direction of force – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Material type – the best choice is high-permeability steel. Cast iron may attract less.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Temperature – temperature increase results in weakening of induction. Check the thermal limit for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.

Safe handling of NdFeB magnets
Adults only

NdFeB magnets are not toys. Swallowing multiple magnets can lead to them attracting across intestines, which poses a critical condition and necessitates immediate surgery.

Power loss in heat

Avoid heat. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, look for HT versions (H, SH, UH).

Nickel coating and allergies

It is widely known that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, refrain from direct skin contact and choose encased magnets.

Fragile material

Protect your eyes. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

Fire warning

Powder produced during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

GPS and phone interference

GPS units and smartphones are extremely sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Finger safety

Large magnets can break fingers in a fraction of a second. Never put your hand between two attracting surfaces.

Handling rules

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

Data carriers

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

Life threat

Warning for patients: Strong magnetic fields disrupt electronics. Maintain minimum 30 cm distance or request help to handle the magnets.

Important! Want to know more? Read our article: Are neodymium magnets dangerous?