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MW 4x5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010077

GTIN/EAN: 5906301810766

5.00
Load capacity 0.46 kg / 4.48 N Magnetic Induction 573.83 mT / 5738 Gs
Diameter Ø
4 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
0.47 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

technical specifications »

0.260 zł net / pcs

0.320 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 of the product - MW 4x5 / N38 - cylindrical magnet

Specification / characteristics - MW 4x5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010077
GTIN/EAN 5906301810766
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 5 mm [±0,1 mm]
Weight 0.47 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.46 kg / 4.48 N
Magnetic Induction ~ ? 573.83 mT / 5738 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 4x5 / 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 simulation of the magnet - technical parameters

Presented values are the outcome of a mathematical simulation. Results were calculated on models for the class Nd2Fe14B. Real-world performance may deviate from the simulation results. Use these data as a supplementary guide for designers.

Table 1: Static force (force vs gap) - interaction chart
MW 4x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5727 Gs
572.7 mT
 0.46 kg / 1.01 pounds
460.0 g / 4.5 N
 weak grip
1 mm 3109 Gs
310.9 mT
 0.14 kg / 0.30 pounds
135.6 g / 1.3 N
 weak grip
2 mm 1577 Gs
157.7 mT
 0.03 kg / 0.08 pounds
34.9 g / 0.3 N
 weak grip
3 mm 856 Gs
85.6 mT
 0.01 kg / 0.02 pounds
10.3 g / 0.1 N
 weak grip
5 mm 323 Gs
32.3 mT
 0.00 kg / 0.00 pounds
1.5 g / 0.0 N
 weak grip
10 mm 66 Gs
6.6 mT
 0.00 kg / 0.00 pounds
0.1 g / 0.0 N
 weak grip
15 mm 24 Gs
2.4 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
20 mm 11 Gs
1.1 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
30 mm 4 Gs
0.4 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
50 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
Grip strength drops drastically per each millimeter of spacing. Remember that even a very thin break (e.g., dirt, paint, dust) strongly weakens the grip. Magnets operate most effectively at the point of direct contact; air break drastically cuts the power. Observe how quickly the pull force plummet, when the magnet does not adhere tightly to the steel surface. When designing the mounting, eliminate additional spacers.

Table 2: Vertical hold (wall)
MW 4x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.09 kg / 0.20 pounds
92.0 g / 0.9 N
1 mm Stal (~0.2) 0.03 kg / 0.06 pounds
28.0 g / 0.3 N
2 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 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 calculates the approximate holding capacity sufficient to cause the downward movement of the magnet down along a vertical metal surface (considering typical friction). The holding force is a function of the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MW 4x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.14 kg / 0.30 pounds
138.0 g / 1.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.09 kg / 0.20 pounds
92.0 g / 0.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.05 kg / 0.10 pounds
46.0 g / 0.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.23 kg / 0.51 pounds
230.0 g / 2.3 N
When hanging a holder on a vertical surface (e.g., a board), it you can count on barely approx. 1/5 of its maximum pull force. Gravity as well as a low friction coefficient mean that holders slip easier than they detach. Planning a wall mount? Remember that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the element will give way down under a noticeably lighter weight. Utilizing a rubberized layer can significantly increase the grip.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 4x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.05 kg / 0.10 pounds
46.0 g / 0.5 N
1 mm
25%
 0.12 kg / 0.25 pounds
115.0 g / 1.1 N
2 mm
50%
 0.23 kg / 0.51 pounds
230.0 g / 2.3 N
3 mm
75%
 0.35 kg / 0.76 pounds
345.0 g / 3.4 N
5 mm
100%
 0.46 kg / 1.01 pounds
460.0 g / 4.5 N
10 mm
100%
 0.46 kg / 1.01 pounds
460.0 g / 4.5 N
11 mm
100%
 0.46 kg / 1.01 pounds
460.0 g / 4.5 N
12 mm
100%
 0.46 kg / 1.01 pounds
460.0 g / 4.5 N
A thin metal plate is unable to take in the entire magnetic field, which weakens actual performance of the holder. Should you install a neodymium to a thin surface, the flux will penetrate right through and the holding will be smaller. To squeeze 100% of this magnet's power, you require a sufficiently solid piece of steel. The material oversaturation causes that on thin elements (e.g., thin profiles), the magnet works worse. We advise picking the steel cross-section based on the following data.

Table 5: Thermal resistance (stability) - power drop
MW 4x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.46 kg / 1.01 pounds
460.0 g / 4.5 N
 OK
40 °C -2.2% 0.45 kg / 0.99 pounds
449.9 g / 4.4 N
 OK
60 °C -4.4% 0.44 kg / 0.97 pounds
439.8 g / 4.3 N
 OK
80 °C -6.6% 0.43 kg / 0.95 pounds
429.6 g / 4.2 N
100 °C -28.8% 0.33 kg / 0.72 pounds
327.5 g / 3.2 N
Classic neodymiums irreversibly lose strength after exceeding the maximum temperature. Avoid high temperatures – heat can permanently demagnetize this magnet. With increasing heat, the magnet's capacity temporarily decreases. Refrain from using this magnet close to ovens higher than its safe range. Too high temperature will result in permanent loss of magnetic properties.
*Important note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low Pc) risk losing magnetic properties sooner than long magnets. The danger warning in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MW 4x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.54 kg / 5.60 pounds
6 049 Gs
0.38 kg / 0.84 pounds
381 g / 3.7 N
 N/A
1 mm 1.45 kg / 3.19 pounds
8 646 Gs
0.22 kg / 0.48 pounds
217 g / 2.1 N
 1.30 kg / 2.87 pounds
~0 Gs
2 mm 0.75 kg / 1.65 pounds
6 218 Gs
0.11 kg / 0.25 pounds
112 g / 1.1 N
 0.67 kg / 1.49 pounds
~0 Gs
3 mm 0.38 kg / 0.83 pounds
4 412 Gs
0.06 kg / 0.12 pounds
57 g / 0.6 N
 0.34 kg / 0.75 pounds
~0 Gs
5 mm 0.10 kg / 0.23 pounds
2 299 Gs
0.02 kg / 0.03 pounds
15 g / 0.2 N
 0.09 kg / 0.20 pounds
~0 Gs
10 mm 0.01 kg / 0.02 pounds
646 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
132 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
12 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
7 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
5 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
2 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 sheet setup. Such a system of magnet-to-magnet generates a stronger field and a further horizon of performance. Planning to create a solid fastener? Apply two magnets instead of one magnet and a striker plate. Exercise caution that when bringing together two magnets, the pinch force is huge. The levitation is marginally weaker than the connection force, but still large.
*The magnetic induction in repulsion mode is approximately ~0 Gs at the midpoint between the magnets (resulting from vector opposition).
* Calculations refer to sliding force of dual matching magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Hazards (implants) - warnings
MW 4x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.0 cm
Hearing aid 10 Gs (1.0 mT) 2.5 cm
Mechanical watch 20 Gs (2.0 mT) 2.0 cm
Mobile device 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
Powerful magnet radiation poses a serious hazard to IT equipment as well as pacemakers. These NdFeB products produce a flux that prevents correct functioning of digital equipment. Be aware: the unseen radiation penetrates the body and plastic. Increased vigilance must be taken by people with hearing aids and insulin pumps. The risk also applies to: automatic timepieces, remotes, membranes, and displays. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - warning
MW 4x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 14.33 km/h
(3.98 m/s)
 0.00 J
30 mm 14.33 km/h
(3.98 m/s)
 0.00 J
50 mm 14.33 km/h
(3.98 m/s)
 0.00 J
100 mm 14.33 km/h
(3.98 m/s)
 0.00 J
Neodymium magnets are prone to chipping – a collision with steel can result in shattering. Pay attention to connection velocity – a magnet released freely speeds with massive force. Impact energy can trigger coating fragments or dangerous crushing to fingers. Always hold the magnet 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 safety glasses when playing with large magnets.

Table 9: Surface protection spec
MW 4x5 / 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 (Flux)
MW 4x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 760 Mx 7.6 µWb
Pc Coefficient 1.00 High (Stable)
Flux value passing through the magnet pole. Key data when building generators as well as sensors. Pc value defines the magnet's operating point.

Table 11: Submerged application
MW 4x5 / N38

Environment Effective steel pull Effect
Air (land) 0.46 kg Standard
Water (riverbed) 0.53 kg
(+0.07 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!
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)

*Warning: On a vertical surface, the magnet retains only a fraction of its max power.

2. Efficiency vs thickness

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

3. Thermal stability

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.00

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%

Ecology and recycling (GPSR)

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: 010077-2026
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This product is a very strong cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø4x5 mm, guarantees optimal power. This specific item features a tolerance of ±0.1mm and professional build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with significant force (approx. 0.46 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects 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 4.48 N with a weight of only 0.47 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
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 precision component. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø4x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
This model is characterized by dimensions Ø4x5 mm, which, at a weight of 0.47 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 0.46 kg (force ~4.48 N), which, with such defined dimensions, proves the high power 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. Such an arrangement is most desirable 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.

Strengths as well as weaknesses of neodymium magnets.

Strengths

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • They do not lose power, even over approximately 10 years – the reduction in strength is only ~1% (according to tests),
  • Magnets effectively resist against loss of magnetization caused by foreign field sources,
  • By covering with a decorative coating of silver, the element acquires an nice look,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Possibility of precise creating and optimizing to specific requirements,
  • Versatile presence in high-tech industry – they serve a role in computer drives, drive modules, advanced medical instruments, also modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Problematic aspects of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • We suggest cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these devices are able to complicate diagnosis medical in case of swallowing.
  • Due to neodymium price, their price is higher than average,

Pull force analysis

Highest magnetic holding force – what contributes to it?

The declared magnet strength concerns the limit force, recorded under ideal test conditions, meaning:
  • using a plate made of low-carbon steel, serving as a circuit closing element
  • whose thickness is min. 10 mm
  • with a surface free of scratches
  • with total lack of distance (without impurities)
  • under vertical force vector (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in practice – influencing factors

Bear in mind that the working load may be lower depending on the following factors, starting with the most relevant:
  • Distance (between the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
  • Base massiveness – too thin steel does not accept the full field, causing part of the power to be escaped to the other side.
  • Material type – the best choice is high-permeability steel. Hardened steels may have worse magnetic properties.
  • Surface quality – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the holding force is lower. Additionally, even a small distance between the magnet and the plate decreases the holding force.

Precautions when working with neodymium magnets
Impact on smartphones

Navigation devices and smartphones are highly susceptible to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Keep away from computers

Avoid bringing magnets close to a wallet, computer, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Do not drill into magnets

Drilling and cutting of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

This is not a toy

Product intended for adults. Tiny parts pose a choking risk, leading to serious injuries. Store away from kids and pets.

Bone fractures

Big blocks can crush fingers instantly. Never place your hand between two attracting surfaces.

Life threat

Warning for patients: Powerful magnets disrupt electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.

Immense force

Use magnets consciously. Their immense force can surprise even experienced users. Plan your moves and respect their power.

Shattering risk

NdFeB magnets are ceramic materials, meaning they are very brittle. Collision of two magnets leads to them cracking into small pieces.

Metal Allergy

Studies show that the nickel plating (the usual finish) is a potent allergen. If you have an allergy, prevent direct skin contact and choose versions in plastic housing.

Thermal limits

Standard neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. The loss of strength is permanent.

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