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MW 45x35 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010074

GTIN/EAN: 5906301810735

Load capacity 68.98 kg / 676.73 N Magnetic Induction 521.39 mT / 5214 Gs
Diameter Ø
45 mm [±0,1 mm]
Height
35 mm [±0,1 mm]
Weight
417.49 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

technical details »

146.42 zł net / pcs

180.10 zł with VAT (23% VAT) / pcs

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Quantity
Net
Gross
price from 1 pcs
146.42 zł
180.10 zł
price from 5 pcs
137.63 zł
169.29 zł
price from 20 pcs
128.85 zł
158.49 zł

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 45x35 / N38 - cylindrical magnet

Specification / characteristics - MW 45x35 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010074
GTIN/EAN 5906301810735
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 45 mm [±0,1 mm]
Height 35 mm [±0,1 mm]
Weight 417.49 g
Magnetization Direction ↑ axial
Load capacity ~ ? 68.98 kg / 676.73 N
Magnetic Induction ~ ? 521.39 mT / 5214 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 45x35 / N38 - cylindrical magnet
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. 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 analysis of the assembly - data

Presented values represent the outcome of a physical simulation. Values are based on models for the class Nd2Fe14B. Actual parameters might slightly differ from theoretical values. Use these data as a reference point when designing systems.

Table 1: Static pull force (force vs gap) - power drop
MW 45x35 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5213 Gs
521.3 mT
 68.98 kg / 152.07 LBS
68980.0 g / 676.7 N
 dangerous!
1 mm 4982 Gs
498.2 mT
 63.01 kg / 138.91 LBS
63010.2 g / 618.1 N
 dangerous!
2 mm 4748 Gs
474.8 mT
 57.23 kg / 126.18 LBS
57234.3 g / 561.5 N
 dangerous!
3 mm 4516 Gs
451.6 mT
 51.76 kg / 114.10 LBS
51756.9 g / 507.7 N
 dangerous!
5 mm 4059 Gs
405.9 mT
 41.82 kg / 92.19 LBS
41816.3 g / 410.2 N
 dangerous!
10 mm 3027 Gs
302.7 mT
 23.26 kg / 51.29 LBS
23264.1 g / 228.2 N
 dangerous!
15 mm 2215 Gs
221.5 mT
 12.45 kg / 27.45 LBS
12451.1 g / 122.1 N
 dangerous!
20 mm 1619 Gs
161.9 mT
 6.66 kg / 14.67 LBS
6656.2 g / 65.3 N
 strong
30 mm 899 Gs
89.9 mT
 2.05 kg / 4.52 LBS
2051.1 g / 20.1 N
 strong
50 mm 340 Gs
34.0 mT
 0.29 kg / 0.65 LBS
292.8 g / 2.9 N
 low risk
Grip strength drops sharply with every subsequent millimeter of spacing. Note that even a microscopic distance (e.g., dirt, paint, rust) significantly reduces the pull force. Magnets hold strongest during direct contact; air break weakens the power. Observe how flashily the load capacity drop, when the product does not touch tightly to the metal substrate. When calculating the mounting, eliminate unnecessary gaps.

Table 2: Slippage force (vertical surface)
MW 45x35 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 13.80 kg / 30.41 LBS
13796.0 g / 135.3 N
1 mm Stal (~0.2) 12.60 kg / 27.78 LBS
12602.0 g / 123.6 N
2 mm Stal (~0.2) 11.45 kg / 25.23 LBS
11446.0 g / 112.3 N
3 mm Stal (~0.2) 10.35 kg / 22.82 LBS
10352.0 g / 101.6 N
5 mm Stal (~0.2) 8.36 kg / 18.44 LBS
8364.0 g / 82.1 N
10 mm Stal (~0.2) 4.65 kg / 10.26 LBS
4652.0 g / 45.6 N
15 mm Stal (~0.2) 2.49 kg / 5.49 LBS
2490.0 g / 24.4 N
20 mm Stal (~0.2) 1.33 kg / 2.94 LBS
1332.0 g / 13.1 N
30 mm Stal (~0.2) 0.41 kg / 0.90 LBS
410.0 g / 4.0 N
50 mm Stal (~0.2) 0.06 kg / 0.13 LBS
58.0 g / 0.6 N
This section presents the theoretical holding capacity required to initiate the downward movement of the magnet down against a vertical metal surface (considering typical friction). This parameter depends on the air gap between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 45x35 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
20.69 kg / 45.62 LBS
20694.0 g / 203.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
13.80 kg / 30.41 LBS
13796.0 g / 135.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
6.90 kg / 15.21 LBS
6898.0 g / 67.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
34.49 kg / 76.04 LBS
34490.0 g / 338.3 N
When placing a element on a vertical plane (e.g., a board), it will maintain just about 1/5 of its maximum pull force. Gravity as well as a weak degree of grip influence the fact that magnets slip faster than they pop off the substrate. Designing a vertical fastening? Remember that the shear force is significantly lower than the perpendicular breakaway force. On a slippery surface, the element will give way down under a noticeably lighter weight. Utilizing a rubberized layer can drastically increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 45x35 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
 2.30 kg / 5.07 LBS
2299.3 g / 22.6 N
1 mm
8%
 5.75 kg / 12.67 LBS
5748.3 g / 56.4 N
2 mm
17%
 11.50 kg / 25.35 LBS
11496.7 g / 112.8 N
3 mm
25%
 17.25 kg / 38.02 LBS
17245.0 g / 169.2 N
5 mm
42%
 28.74 kg / 63.36 LBS
28741.7 g / 282.0 N
10 mm
83%
 57.48 kg / 126.73 LBS
57483.3 g / 563.9 N
11 mm
92%
 63.23 kg / 139.40 LBS
63231.7 g / 620.3 N
12 mm
100%
 68.98 kg / 152.07 LBS
68980.0 g / 676.7 N
A thin metal plate is not enough to take in the full magnetic flux, which wastes potential of the magnet. If you mount a strong magnet to a too thin substrate, the field will pass right through and the attraction force will be weaker. To squeeze full efficiency of this magnet's power, you need a suitably thick element of metal. The saturation phenomenon causes that on delicate walls (e.g., thin profiles), the holder works worse. We advise picking the steel dimension from these parameters.

Table 5: Thermal stability (stability) - resistance threshold
MW 45x35 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 68.98 kg / 152.07 LBS
68980.0 g / 676.7 N
 OK
40 °C -2.2% 67.46 kg / 148.73 LBS
67462.4 g / 661.8 N
 OK
60 °C -4.4% 65.94 kg / 145.38 LBS
65944.9 g / 646.9 N
 OK
80 °C -6.6% 64.43 kg / 142.04 LBS
64427.3 g / 632.0 N
100 °C -28.8% 49.11 kg / 108.28 LBS
49113.8 g / 481.8 N
Standard neodymium magnets change their properties strength past the thermal threshold. Protect against heat – heat can irreversibly damage this product. With every degree above norm, the neodymium's capacity briefly lowers. Refrain from using this product near heat sources higher than its safe range. Ignoring the limit will lead to irreversible degradation of magnetic properties.
*Important note: Thermal stability depends not only on the material grade, as well as the dimension ratios. Flat magnets (low Pc) are more susceptible to demagnetization sooner than long magnets. Warning indicator in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - field range
MW 45x35 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 266.45 kg / 587.43 LBS
5 900 Gs
39.97 kg / 88.11 LBS
39968 g / 392.1 N
 N/A
1 mm 254.93 kg / 562.03 LBS
10 198 Gs
38.24 kg / 84.30 LBS
38240 g / 375.1 N
 229.44 kg / 505.82 LBS
~0 Gs
2 mm 243.39 kg / 536.59 LBS
9 965 Gs
36.51 kg / 80.49 LBS
36509 g / 358.2 N
 219.05 kg / 482.93 LBS
~0 Gs
3 mm 232.10 kg / 511.70 LBS
9 731 Gs
34.82 kg / 76.76 LBS
34816 g / 341.5 N
 208.89 kg / 460.53 LBS
~0 Gs
5 mm 210.35 kg / 463.75 LBS
9 264 Gs
31.55 kg / 69.56 LBS
31553 g / 309.5 N
 189.32 kg / 417.37 LBS
~0 Gs
10 mm 161.53 kg / 356.11 LBS
8 118 Gs
24.23 kg / 53.42 LBS
24229 g / 237.7 N
 145.37 kg / 320.49 LBS
~0 Gs
20 mm 89.86 kg / 198.12 LBS
6 055 Gs
13.48 kg / 29.72 LBS
13480 g / 132.2 N
 80.88 kg / 178.30 LBS
~0 Gs
50 mm 14.04 kg / 30.96 LBS
2 394 Gs
2.11 kg / 4.64 LBS
2107 g / 20.7 N
 12.64 kg / 27.87 LBS
~0 Gs
60 mm 7.92 kg / 17.47 LBS
1 798 Gs
1.19 kg / 2.62 LBS
1188 g / 11.7 N
 7.13 kg / 15.72 LBS
~0 Gs
70 mm 4.63 kg / 10.21 LBS
1 375 Gs
0.69 kg / 1.53 LBS
695 g / 6.8 N
 4.17 kg / 9.19 LBS
~0 Gs
80 mm 2.80 kg / 6.18 LBS
1 070 Gs
0.42 kg / 0.93 LBS
421 g / 4.1 N
 2.52 kg / 5.56 LBS
~0 Gs
90 mm 1.75 kg / 3.87 LBS
846 Gs
0.26 kg / 0.58 LBS
263 g / 2.6 N
 1.58 kg / 3.48 LBS
~0 Gs
100 mm 1.13 kg / 2.49 LBS
679 Gs
0.17 kg / 0.37 LBS
170 g / 1.7 N
 1.02 kg / 2.24 LBS
~0 Gs
Two magnets attract each other from a much further distance than a magnet and steel combination. The setup of magnet-to-magnet generates a stronger field and a larger range of performance. Designing a solid fastener? Utilize two neodymiums instead of a neodymium and a striker plate. Remember that when connecting a pair of magnets, the pinch force is massive. The levitation is slightly lower than the attraction, but still significant.
*Flux density in repulsion mode drops to ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
* Figures refer to shear force of a pair of identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - precautionary measures
MW 45x35 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 26.5 cm
Hearing aid 10 Gs (1.0 mT) 20.5 cm
Mechanical watch 20 Gs (2.0 mT) 16.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 12.5 cm
Remote 50 Gs (5.0 mT) 11.5 cm
Payment card 400 Gs (40.0 mT) 5.0 cm
HDD hard drive 600 Gs (60.0 mT) 4.0 cm
Extremely neodym field poses a serious hazard to electronic devices and medical implants. These magnets produce a flux that prevents correct functioning of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and plastic. Increased vigilance must be taken by people with hearing aids and drug dispensers. The risk also applies to: mechanical watches, remotes, membranes, and displays. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - collision effects
MW 45x35 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 16.24 km/h
(4.51 m/s)
 4.25 J
30 mm 19.19 km/h
(5.33 m/s)
 5.93 J
50 mm 19.46 km/h
(5.41 m/s)
 6.10 J
100 mm 19.52 km/h
(5.42 m/s)
 6.14 J
Neodymium magnets are delicate – a violent impact against metal can result in shattering. Watch the impact speed – a neodymium left loose speeds with massive force. Kinetic force can cause material chips or dangerous crushing to skin. Hold the magnet firmly during mounting so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Coating parameters (durability)
MW 45x35 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Pc)
MW 45x35 / N38

Parameter Value SI Unit / Description
Magnetic Flux 83 921 Mx 839.2 µWb
Pc Coefficient 0.78 High (Stable)
Total magnetic flux passing through the magnet pole. Key data for generator designers as well as sensors. Pc value defines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 45x35 / N38

Environment Effective steel pull Effect
Air (land) 68.98 kg Standard
Water (riverbed) 78.98 kg
(+10.00 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!
Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Warning: On a vertical wall, the magnet retains just ~20% of its perpendicular strength.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.

3. Thermal stability

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.78

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 and environmental data

Elemental analysis

iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%

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: 010074-2026
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This product is an extremely powerful rod magnet, composed of durable NdFeB material, which, with dimensions of Ø45x35 mm, guarantees optimal power. The MW 45x35 / N38 component features high dimensional repeatability and professional build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 68.98 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 676.73 N with a weight of only 417.49 g, this rod is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø45x35), 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 45 mm and height 35 mm. The value of 676.73 N means that the magnet is capable of holding a weight many times exceeding its own mass of 417.49 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 35 mm), which means that the N and S poles are located on the flat, circular surfaces. 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.

Advantages as well as disadvantages of rare earth magnets.

Advantages

Besides their durability, neodymium magnets are valued for these benefits:
  • They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (according to theory),
  • Magnets very well protect themselves against demagnetization caused by ambient magnetic noise,
  • By covering with a smooth coating of nickel, the element has an professional look,
  • Neodymium magnets ensure maximum magnetic induction on a small surface, which increases force concentration,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
  • Possibility of exact forming as well as optimizing to concrete requirements,
  • Huge importance in future technologies – they are utilized in hard drives, electric motors, diagnostic systems, also modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Limited ability of producing threads in the magnet and complicated shapes - recommended is cover - magnet mounting.
  • Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, tiny parts of these products are able to complicate diagnosis medical after entering the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Lifting parameters

Best holding force of the magnet in ideal parameters – what it depends on?

The force parameter is a theoretical maximum value conducted under the following configuration:
  • using a plate made of high-permeability steel, acting as a circuit closing element
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • characterized by smoothness
  • under conditions of ideal adhesion (metal-to-metal)
  • during detachment in a direction vertical to the plane
  • in neutral thermal conditions

Key elements affecting lifting force

Please note that the working load may be lower subject to elements below, starting with the most relevant:
  • Distance (between the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
  • Angle of force application – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
  • Surface condition – ground elements ensure maximum contact, which improves force. Rough surfaces weaken the grip.
  • Thermal factor – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was assessed with the use of a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the load capacity is reduced by as much as fivefold. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Warnings
Data carriers

Equipment safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).

No play value

NdFeB magnets are not suitable for play. Swallowing multiple magnets can lead to them attracting across intestines, which constitutes a severe health hazard and necessitates urgent medical intervention.

Dust is flammable

Mechanical processing of NdFeB material poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Handling guide

Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.

Warning for heart patients

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Crushing force

Big blocks can break fingers in a fraction of a second. Never place your hand betwixt two attracting surfaces.

Beware of splinters

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets leads to them cracking into small pieces.

Allergy Warning

Certain individuals suffer from a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Extended handling can result in an allergic reaction. It is best to use safety gloves.

Permanent damage

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will ruin its properties and strength.

Impact on smartphones

An intense magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Do not bring magnets close to a smartphone to avoid damaging the sensors.

Danger! Details about risks in the article: Safety of working with magnets.