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MW 70x60 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010098

GTIN/EAN: 5906301810971

5.00

Diameter Ø

70 mm [±0,1 mm]

Height

60 mm [±0,1 mm]

Weight

1731.8 g

Magnetization Direction

↑ axial

Load capacity

163.93 kg / 1608.16 N

Magnetic Induction

535.45 mT / 5354 Gs

Coating

[NiCuNi] Nickel

technical details »

630.01 ZŁ with VAT / pcs + price for transport

512.20 ZŁ net + 23% VAT / pcs

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Product card - MW 70x60 / N38 - cylindrical magnet

Specification / characteristics - MW 70x60 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010098
GTIN/EAN 5906301810971
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 70 mm [±0,1 mm]
Height 60 mm [±0,1 mm]
Weight 1731.8 g
Magnetization Direction ↑ axial
Load capacity ~ ? 163.93 kg / 1608.16 N
Magnetic Induction ~ ? 535.45 mT / 5354 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 70x60 / 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 312 - 380 °C
Curie Temperature TF 593 - 716 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Technical analysis of the product - data

The following information represent the direct effect of a mathematical simulation. Results were calculated on algorithms for the class Nd2Fe14B. Real-world performance might slightly differ. Please consider these data as a supplementary guide for designers.

Table 1: Static pull force (force vs gap) - characteristics
MW 70x60 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5354 Gs
535.4 mT
 163.93 kg / 361.40 LBS
163930.0 g / 1608.2 N
 dangerous!
1 mm 5201 Gs
520.1 mT
 154.68 kg / 341.01 LBS
154677.8 g / 1517.4 N
 dangerous!
2 mm 5045 Gs
504.5 mT
 145.58 kg / 320.96 LBS
145583.5 g / 1428.2 N
 dangerous!
3 mm 4890 Gs
489.0 mT
 136.77 kg / 301.52 LBS
136769.5 g / 1341.7 N
 dangerous!
5 mm 4582 Gs
458.2 mT
 120.07 kg / 264.72 LBS
120074.6 g / 1177.9 N
 dangerous!
10 mm 3842 Gs
384.2 mT
 84.43 kg / 186.13 LBS
84425.8 g / 828.2 N
 dangerous!
15 mm 3176 Gs
317.6 mT
 57.69 kg / 127.18 LBS
57688.8 g / 565.9 N
 dangerous!
20 mm 2604 Gs
260.4 mT
 38.78 kg / 85.50 LBS
38782.9 g / 380.5 N
 dangerous!
30 mm 1744 Gs
174.4 mT
 17.39 kg / 38.33 LBS
17385.0 g / 170.5 N
 dangerous!
50 mm 829 Gs
82.9 mT
 3.93 kg / 8.66 LBS
3929.4 g / 38.5 N
 medium risk
Pulling power drops sharply per each millimeter of spacing. Remember that every additional insulation layer (e.g., contamination, varnish, dust) significantly weakens the grip. Magnetic products hold strongest in perfect adhesion; air break nullifies the force. Notice how rapidly the parameters plummet, when the magnet does not adhere flatly to the steel surface. When calculating the arrangement, eliminate additional spacers.

Table 2: Vertical load (vertical surface)
MW 70x60 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 32.79 kg / 72.28 LBS
32786.0 g / 321.6 N
1 mm Stal (~0.2) 30.94 kg / 68.20 LBS
30936.0 g / 303.5 N
2 mm Stal (~0.2) 29.12 kg / 64.19 LBS
29116.0 g / 285.6 N
3 mm Stal (~0.2) 27.35 kg / 60.31 LBS
27354.0 g / 268.3 N
5 mm Stal (~0.2) 24.01 kg / 52.94 LBS
24014.0 g / 235.6 N
10 mm Stal (~0.2) 16.89 kg / 37.23 LBS
16886.0 g / 165.7 N
15 mm Stal (~0.2) 11.54 kg / 25.44 LBS
11538.0 g / 113.2 N
20 mm Stal (~0.2) 7.76 kg / 17.10 LBS
7756.0 g / 76.1 N
30 mm Stal (~0.2) 3.48 kg / 7.67 LBS
3478.0 g / 34.1 N
50 mm Stal (~0.2) 0.79 kg / 1.73 LBS
786.0 g / 7.7 N
The following data defines the theoretical force necessary to start the downward movement of the magnet downwards along a vertical steel plate (assuming typical friction coefficient). This parameter varies with the gap size between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MW 70x60 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
49.18 kg / 108.42 LBS
49179.0 g / 482.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
32.79 kg / 72.28 LBS
32786.0 g / 321.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
16.39 kg / 36.14 LBS
16393.0 g / 160.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
81.97 kg / 180.70 LBS
81965.0 g / 804.1 N
When hanging a holder on a vertical plane (e.g., a fridge), it will only hold just approx. 20%-30% of its nominal power. Gravitational force and a low friction coefficient mean that holders slip faster than they pop off the substrate. Want to create a hanger? Remember that the shear force is significantly lower than the perpendicular breakaway force. On a smooth steel, the element will slip down under a noticeably lighter cargo. Utilizing a rubberized pad can significantly improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 70x60 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
 5.46 kg / 12.05 LBS
5464.3 g / 53.6 N
1 mm
8%
 13.66 kg / 30.12 LBS
13660.8 g / 134.0 N
2 mm
17%
 27.32 kg / 60.23 LBS
27321.7 g / 268.0 N
3 mm
25%
 40.98 kg / 90.35 LBS
40982.5 g / 402.0 N
5 mm
42%
 68.30 kg / 150.58 LBS
68304.2 g / 670.1 N
10 mm
83%
 136.61 kg / 301.17 LBS
136608.3 g / 1340.1 N
11 mm
92%
 150.27 kg / 331.29 LBS
150269.2 g / 1474.1 N
12 mm
100%
 163.93 kg / 361.40 LBS
163930.0 g / 1608.2 N
A too thin steel is not enough to absorb the entire magnetic field, which wastes potential of the holder. If you attach a powerful product to a weak sheet, the field will pass right through and the pull force will drop sharply. To achieve the maximum of this magnet's power, you require a sufficiently solid piece of steel. The saturation effect causes that on sheet metal structures (e.g., appliance housings), the holder holds weaker. We recommend selecting the steel cross-section from these parameters.

Table 5: Thermal resistance (stability) - power drop
MW 70x60 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 163.93 kg / 361.40 LBS
163930.0 g / 1608.2 N
 OK
40 °C -2.2% 160.32 kg / 353.45 LBS
160323.5 g / 1572.8 N
 OK
60 °C -4.4% 156.72 kg / 345.50 LBS
156717.1 g / 1537.4 N
 OK
80 °C -6.6% 153.11 kg / 337.55 LBS
153110.6 g / 1502.0 N
100 °C -28.8% 116.72 kg / 257.32 LBS
116718.2 g / 1145.0 N
Standard neodymium magnets irreversibly lose strength after exceeding the maximum temperature. Protect against heat – heat can irreversibly destroy this product. As the temperature rises, the magnet's force temporarily lowers. Avoid using this magnet close to heaters higher than its operating temperature limit. Too high temperature will cause destruction of magnetism.
*Engineering note: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) risk losing magnetic properties sooner than taller cylinders. Warning indicator in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - field range
MW 70x60 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 680.08 kg / 1499.31 LBS
5 950 Gs
102.01 kg / 224.90 LBS
102012 g / 1000.7 N
 N/A
1 mm 660.96 kg / 1457.16 LBS
10 556 Gs
99.14 kg / 218.57 LBS
99144 g / 972.6 N
 594.86 kg / 1311.45 LBS
~0 Gs
2 mm 641.69 kg / 1414.69 LBS
10 401 Gs
96.25 kg / 212.20 LBS
96254 g / 944.3 N
 577.52 kg / 1273.22 LBS
~0 Gs
3 mm 622.69 kg / 1372.80 LBS
10 246 Gs
93.40 kg / 205.92 LBS
93404 g / 916.3 N
 560.42 kg / 1235.52 LBS
~0 Gs
5 mm 585.53 kg / 1290.87 LBS
9 936 Gs
87.83 kg / 193.63 LBS
87830 g / 861.6 N
 526.98 kg / 1161.79 LBS
~0 Gs
10 mm 498.14 kg / 1098.21 LBS
9 164 Gs
74.72 kg / 164.73 LBS
74721 g / 733.0 N
 448.33 kg / 988.39 LBS
~0 Gs
20 mm 350.25 kg / 772.16 LBS
7 684 Gs
52.54 kg / 115.82 LBS
52537 g / 515.4 N
 315.22 kg / 694.95 LBS
~0 Gs
50 mm 107.57 kg / 237.16 LBS
4 259 Gs
16.14 kg / 35.57 LBS
16136 g / 158.3 N
 96.82 kg / 213.44 LBS
~0 Gs
60 mm 72.12 kg / 159.00 LBS
3 487 Gs
10.82 kg / 23.85 LBS
10818 g / 106.1 N
 64.91 kg / 143.10 LBS
~0 Gs
70 mm 48.77 kg / 107.51 LBS
2 867 Gs
7.31 kg / 16.13 LBS
7315 g / 71.8 N
 43.89 kg / 96.76 LBS
~0 Gs
80 mm 33.37 kg / 73.57 LBS
2 372 Gs
5.01 kg / 11.04 LBS
5005 g / 49.1 N
 30.03 kg / 66.21 LBS
~0 Gs
90 mm 23.15 kg / 51.04 LBS
1 976 Gs
3.47 kg / 7.66 LBS
3473 g / 34.1 N
 20.84 kg / 45.94 LBS
~0 Gs
100 mm 16.30 kg / 35.94 LBS
1 658 Gs
2.45 kg / 5.39 LBS
2445 g / 24.0 N
 14.67 kg / 32.34 LBS
~0 Gs
Two magnets interact from a significantly greater distance than a neodymium and metal setup. Such a system of magnet-to-magnet creates a more powerful interaction and a wider radius of operation. Designing a solid fastener? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when bringing together two magnets, the collision energy is extreme. The repulsion force is a bit weaker than the connection force, but still impressive.
*Field value in repulsion mode is approximately ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Important: Calculations show sliding force of two identical neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Hazards (electronics) - precautionary measures
MW 70x60 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 42.0 cm
Hearing aid 10 Gs (1.0 mT) 33.0 cm
Timepiece 20 Gs (2.0 mT) 25.5 cm
Mobile device 40 Gs (4.0 mT) 19.5 cm
Remote 50 Gs (5.0 mT) 18.0 cm
Payment card 400 Gs (40.0 mT) 7.5 cm
HDD hard drive 600 Gs (60.0 mT) 6.0 cm
Extremely neodym field poses a real danger to electronic devices and medical implants. These NdFeB products produce a flux that disrupts operation of sensitive medical devices. Notice: the invisible magnetic field penetrates the body and glass. Exceptional care must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, car keys, membranes, and displays. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MW 70x60 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 12.58 km/h
(3.49 m/s)
 10.57 J
30 mm 18.09 km/h
(5.02 m/s)
 21.86 J
50 mm 22.27 km/h
(6.19 m/s)
 33.13 J
100 mm 31.06 km/h
(8.63 m/s)
 64.44 J
Magnetic elements are delicate – a collision with steel causes immediate chipping. Watch the impact speed – a neodymium left loose speeds with massive force. Striking energy can trigger coating fragments or injury to skin. Always hold the magnet during mounting so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when handling with large magnets.

Table 9: Anti-corrosion coating durability
MW 70x60 / 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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Pc)
MW 70x60 / N38

Parameter Value SI Unit / Description
Magnetic Flux 209 626 Mx 2096.3 µWb
Pc Coefficient 0.82 High (Stable)
Flux value emitted by the pole surface. Key data when building generators and motors. Pc value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 70x60 / N38

Environment Effective steel pull Effect
Air (land) 163.93 kg Standard
Water (riverbed) 187.70 kg
(+23.77 kg buoyancy gain)
+14.5%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
The magnetic field penetrates through water without any losses. However, remember the water resistance when pulling the rope quickly.
1. Vertical hold

*Note: On a vertical wall, the magnet holds merely ~20% of its perpendicular strength.

2. Steel thickness impact

*Thin metal sheet (e.g. 0.5mm PC case) significantly reduces the holding force.

3. Power loss vs temp

*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) = 0.82

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical specification and ecology
Chemical composition
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: 010098-2026
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The offered product is an exceptionally strong cylindrical magnet, made from modern NdFeB material, which, at dimensions of Ø70x60 mm, guarantees optimal power. The MW 70x60 / N38 model features a tolerance of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 163.93 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 1608.16 N with a weight of only 1731.8 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
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 long-term durability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need even stronger magnets in the same volume (Ø70x60), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
This model is characterized by dimensions Ø70x60 mm, which, at a weight of 1731.8 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 163.93 kg (force ~1608.16 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it 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 70 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 diametrically if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Pros

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • Their power remains stable, and after approximately 10 years it drops only by ~1% (theoretically),
  • They retain their magnetic properties even under external field action,
  • Thanks to the reflective finish, the surface of nickel, gold-plated, or silver-plated gives an professional appearance,
  • Magnetic induction on the working part of the magnet turns out to be impressive,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Due to the possibility of precise forming and customization to custom projects, neodymium magnets can be produced in a variety of forms and dimensions, which makes them more universal,
  • Fundamental importance in modern technologies – they are commonly used in HDD drives, motor assemblies, medical devices, as well as technologically advanced constructions.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in producing nuts and complex shapes in magnets, we recommend using casing - magnetic mount.
  • Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these magnets can disrupt the diagnostic process medical after entering the body.
  • Due to neodymium price, their price is higher than average,

Pull force analysis

Maximum magnetic pulling force – what contributes to it?

The declared magnet strength concerns the peak performance, measured under optimal environment, specifically:
  • on a plate made of mild steel, effectively closing the magnetic field
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with an polished contact surface
  • under conditions of ideal adhesion (metal-to-metal)
  • during detachment in a direction vertical to the mounting surface
  • at room temperature

Lifting capacity in practice – influencing factors

During everyday use, the actual lifting capacity is determined by several key aspects, presented from crucial:
  • Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Chemical composition of the base – low-carbon steel gives the best results. Higher carbon content decrease magnetic properties and lifting capacity.
  • Surface finish – full contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Temperature – temperature increase causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, however under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Warnings
Nickel coating and allergies

Some people experience a sensitization to nickel, which is the standard coating for neodymium magnets. Prolonged contact may cause skin redness. We recommend use safety gloves.

Risk of cracking

Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.

Do not overheat magnets

Do not overheat. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Mechanical processing

Drilling and cutting of NdFeB material poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Handling guide

Handle magnets consciously. Their immense force can surprise even professionals. Plan your moves and respect their power.

Swallowing risk

These products are not toys. Accidental ingestion of multiple magnets can lead to them connecting inside the digestive tract, which poses a severe health hazard and necessitates urgent medical intervention.

Electronic devices

Avoid bringing magnets near a wallet, laptop, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Hand protection

Watch your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, destroying everything in their path. Be careful!

ICD Warning

People with a pacemaker must keep an safe separation from magnets. The magnetic field can stop the functioning of the life-saving device.

Magnetic interference

Navigation devices and mobile phones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Warning! Learn more about risks in the article: Safety of working with magnets.