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MW 70x20 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010095

GTIN/EAN: 5906301810940

5.00
Load capacity 99.83 kg / 979.00 N Magnetic Induction 307.57 mT / 3076 Gs
Diameter Ø
70 mm [±0,1 mm]
Height
20 mm [±0,1 mm]
Weight
577.27 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product parameters »

195.00 zł net / pcs

239.85 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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Physical properties - MW 70x20 / N38 - cylindrical magnet

Specification / characteristics - MW 70x20 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010095
GTIN/EAN 5906301810940
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 20 mm [±0,1 mm]
Weight 577.27 g
Magnetization Direction ↑ axial
Load capacity ~ ? 99.83 kg / 979.00 N
Magnetic Induction ~ ? 307.57 mT / 3076 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 70x20 / 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

Technical simulation of the assembly - technical parameters

The following values are the direct effect of a engineering calculation. Results rely on models for the material Nd2Fe14B. Operational conditions may differ from theoretical values. Please consider these data as a supplementary guide during assembly planning.

Table 1: Static force (pull vs distance) - power drop
MW 70x20 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3075 Gs
307.5 mT
 99.83 kg / 220.09 pounds
99830.0 g / 979.3 N
 critical level
1 mm 3013 Gs
301.3 mT
 95.80 kg / 211.21 pounds
95804.4 g / 939.8 N
 critical level
2 mm 2946 Gs
294.6 mT
 91.59 kg / 201.92 pounds
91587.7 g / 898.5 N
 critical level
3 mm 2875 Gs
287.5 mT
 87.27 kg / 192.39 pounds
87266.0 g / 856.1 N
 critical level
5 mm 2727 Gs
272.7 mT
 78.48 kg / 173.02 pounds
78482.2 g / 769.9 N
 critical level
10 mm 2332 Gs
233.2 mT
 57.38 kg / 126.50 pounds
57380.6 g / 562.9 N
 critical level
15 mm 1942 Gs
194.2 mT
 39.80 kg / 87.73 pounds
39795.7 g / 390.4 N
 critical level
20 mm 1590 Gs
159.0 mT
 26.68 kg / 58.82 pounds
26680.3 g / 261.7 N
 critical level
30 mm 1044 Gs
104.4 mT
 11.51 kg / 25.38 pounds
11511.2 g / 112.9 N
 critical level
50 mm 466 Gs
46.6 mT
 2.29 kg / 5.06 pounds
2294.1 g / 22.5 N
 warning
Grip strength drops significantly with every subsequent millimeter of distance. Keep in mind that every additional insulation layer (e.g., dirt, paint, veneer) significantly diminishes the holding power. Magnets hold strongest at the point of direct contact; air break kills the force. Notice how quickly the parameters drop, when the magnet does not adhere directly to the steel surface. When planning the assembly, avoid unnecessary gaps.

Table 2: Vertical force (wall)
MW 70x20 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 19.97 kg / 44.02 pounds
19966.0 g / 195.9 N
1 mm Stal (~0.2) 19.16 kg / 42.24 pounds
19160.0 g / 188.0 N
2 mm Stal (~0.2) 18.32 kg / 40.38 pounds
18318.0 g / 179.7 N
3 mm Stal (~0.2) 17.45 kg / 38.48 pounds
17454.0 g / 171.2 N
5 mm Stal (~0.2) 15.70 kg / 34.60 pounds
15696.0 g / 154.0 N
10 mm Stal (~0.2) 11.48 kg / 25.30 pounds
11476.0 g / 112.6 N
15 mm Stal (~0.2) 7.96 kg / 17.55 pounds
7960.0 g / 78.1 N
20 mm Stal (~0.2) 5.34 kg / 11.76 pounds
5336.0 g / 52.3 N
30 mm Stal (~0.2) 2.30 kg / 5.08 pounds
2302.0 g / 22.6 N
50 mm Stal (~0.2) 0.46 kg / 1.01 pounds
458.0 g / 4.5 N
This section shows the estimated holding capacity necessary to cause the sliding of the magnet down against a vertical steel wall (considering typical friction coefficient). The holding force depends on the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 70x20 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
29.95 kg / 66.03 pounds
29949.0 g / 293.8 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
19.97 kg / 44.02 pounds
19966.0 g / 195.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
9.98 kg / 22.01 pounds
9983.0 g / 97.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
49.92 kg / 110.04 pounds
49915.0 g / 489.7 N
When placing a magnet on a vertical plane (e.g., a fridge), it will maintain barely approx. 20%-30% of its maximum pull force. Gravitational force as well as a low friction coefficient cause that holders slip easier than they pop off the substrate. Planning a wall mount? Note that the sliding force is much weaker than the maximum static pull force. On a painted metal, the holder will slide down under a significantly smaller cargo. Utilizing a rubberized layer can drastically improve the result.

Table 4: Material efficiency (substrate influence) - power losses
MW 70x20 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
 3.33 kg / 7.34 pounds
3327.7 g / 32.6 N
1 mm
8%
 8.32 kg / 18.34 pounds
8319.2 g / 81.6 N
2 mm
17%
 16.64 kg / 36.68 pounds
16638.3 g / 163.2 N
3 mm
25%
 24.96 kg / 55.02 pounds
24957.5 g / 244.8 N
5 mm
42%
 41.60 kg / 91.70 pounds
41595.8 g / 408.1 N
10 mm
83%
 83.19 kg / 183.41 pounds
83191.7 g / 816.1 N
11 mm
92%
 91.51 kg / 201.75 pounds
91510.8 g / 897.7 N
12 mm
100%
 99.83 kg / 220.09 pounds
99830.0 g / 979.3 N
A too thin steel is incapable of conduct the entire magnetic field, which wastes potential of the magnet. Should you attach a powerful product to a weak sheet, the flux will pass right through and the holding will be smaller. To utilize full efficiency of this magnet's power, you need a suitably thick element of steel. The material oversaturation causes that on thin elements (e.g., car bodies), the holder shows lower pull force. We advise picking the steel thickness according to the table below.

Table 5: Thermal stability (material behavior) - power drop
MW 70x20 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 99.83 kg / 220.09 pounds
99830.0 g / 979.3 N
 OK
40 °C -2.2% 97.63 kg / 215.25 pounds
97633.7 g / 957.8 N
 OK
60 °C -4.4% 95.44 kg / 210.40 pounds
95437.5 g / 936.2 N
80 °C -6.6% 93.24 kg / 205.56 pounds
93241.2 g / 914.7 N
100 °C -28.8% 71.08 kg / 156.70 pounds
71079.0 g / 697.3 N
Classic neodymiums change their properties parameters past the thermal threshold. Avoid high temperatures – heat can permanently destroy this magnet. As the temperature rises, the neodymium's force momentarily drops. Do not use this magnet near heat sources exceeding its operating temperature limit. Exceeding the critical threshold will result in irreversible degradation of magnetism.
*Engineering note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (pancake types) may lose charge permanently sooner than taller cylinders. The danger warning in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 70x20 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 224.41 kg / 494.73 pounds
4 665 Gs
33.66 kg / 74.21 pounds
33661 g / 330.2 N
 N/A
1 mm 219.98 kg / 484.97 pounds
6 090 Gs
33.00 kg / 72.74 pounds
32997 g / 323.7 N
 197.98 kg / 436.47 pounds
~0 Gs
2 mm 215.36 kg / 474.78 pounds
6 026 Gs
32.30 kg / 71.22 pounds
32304 g / 316.9 N
 193.82 kg / 427.31 pounds
~0 Gs
3 mm 210.66 kg / 464.41 pounds
5 959 Gs
31.60 kg / 69.66 pounds
31598 g / 310.0 N
 189.59 kg / 417.97 pounds
~0 Gs
5 mm 201.05 kg / 443.23 pounds
5 822 Gs
30.16 kg / 66.48 pounds
30157 g / 295.8 N
 180.94 kg / 398.91 pounds
~0 Gs
10 mm 176.42 kg / 388.94 pounds
5 454 Gs
26.46 kg / 58.34 pounds
26463 g / 259.6 N
 158.78 kg / 350.05 pounds
~0 Gs
20 mm 128.99 kg / 284.36 pounds
4 663 Gs
19.35 kg / 42.65 pounds
19348 g / 189.8 N
 116.09 kg / 255.93 pounds
~0 Gs
50 mm 39.50 kg / 87.08 pounds
2 581 Gs
5.93 kg / 13.06 pounds
5925 g / 58.1 N
 35.55 kg / 78.38 pounds
~0 Gs
60 mm 25.88 kg / 57.05 pounds
2 089 Gs
3.88 kg / 8.56 pounds
3881 g / 38.1 N
 23.29 kg / 51.34 pounds
~0 Gs
70 mm 17.01 kg / 37.49 pounds
1 693 Gs
2.55 kg / 5.62 pounds
2551 g / 25.0 N
 15.31 kg / 33.74 pounds
~0 Gs
80 mm 11.28 kg / 24.86 pounds
1 379 Gs
1.69 kg / 3.73 pounds
1692 g / 16.6 N
 10.15 kg / 22.38 pounds
~0 Gs
90 mm 7.57 kg / 16.69 pounds
1 130 Gs
1.14 kg / 2.50 pounds
1136 g / 11.1 N
 6.81 kg / 15.02 pounds
~0 Gs
100 mm 5.16 kg / 11.37 pounds
932 Gs
0.77 kg / 1.71 pounds
774 g / 7.6 N
 4.64 kg / 10.23 pounds
~0 Gs
Two strong neodymiums attract each other from a significantly greater distance than a magnet and sheet combination. The connection of two magnets produces a massive flux and a further horizon of performance. Designing a powerful holder? Use a pair of magnets instead of one magnet and a striker plate. Exercise caution that when bringing together two magnets, the collision energy is extreme. The repulsion force is marginally weaker than the attraction, but still impressive.
*The magnetic induction between like poles drops to ~0 Gs at the midpoint of the gap (resulting from vector opposition).
Note: Estimates refer to friction force of dual identical neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 70x20 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 30.5 cm
Hearing aid 10 Gs (1.0 mT) 24.0 cm
Mechanical watch 20 Gs (2.0 mT) 18.5 cm
Mobile device 40 Gs (4.0 mT) 14.5 cm
Remote 50 Gs (5.0 mT) 13.5 cm
Payment card 400 Gs (40.0 mT) 5.5 cm
HDD hard drive 600 Gs (60.0 mT) 4.5 cm
Extremely neodym field poses a real danger to electronics as well as pacemakers. These neodymiums generate a flux that destroys function of sensitive medical devices. Notice: the invisible magnetic field acts through matter and housings. Exceptional care must be exercised by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - collision effects
MW 70x20 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 18.60 km/h
(5.17 m/s)
 7.71 J
30 mm 24.58 km/h
(6.83 m/s)
 13.46 J
50 mm 25.57 km/h
(7.10 m/s)
 14.56 J
100 mm 25.85 km/h
(7.18 m/s)
 14.88 J
NdFeB products are delicate – a strong collision with metal can result in shattering. Watch the impact speed – a magnet released freely speeds with massive force. Impact energy can trigger coating fragments or injury to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Use safety goggles when working with powerful specimens.

Table 9: Coating parameters (durability)
MW 70x20 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MW 70x20 / N38

Parameter Value SI Unit / Description
Magnetic Flux 128 363 Mx 1283.6 µWb
Pc Coefficient 0.39 Low (Flat)
Total magnetic flux passing through the pole surface. Essential parameter when building generators and motors. Pc value defines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 70x20 / N38

Environment Effective steel pull Effect
Air (land) 99.83 kg Standard
Water (riverbed) 114.31 kg
(+14.48 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
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. Shear force

*Note: On a vertical surface, the magnet holds just a fraction of its max power.

2. Plate thickness effect

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

3. Heat tolerance

*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) = 0.39

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

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%

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: 010095-2026
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This product is a very strong cylindrical magnet, made from advanced NdFeB material, which, at dimensions of Ø70x20 mm, guarantees optimal power. The MW 70x20 / N38 component boasts high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 99.83 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 979.00 N with a weight of only 577.27 g, this rod is indispensable in electronics and wherever every gram matters.
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., 70.1 mm) using epoxy glues. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets N38 are strong enough for 90% of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø70x20), 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 70 mm and height 20 mm. The value of 979.00 N means that the magnet is capable of holding a weight many times exceeding its own mass of 577.27 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 20 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 through the diameter if your project requires it.

Pros and cons of neodymium magnets.

Strengths

Apart from their notable magnetic energy, neodymium magnets have these key benefits:
  • Their strength is maintained, and after approximately ten years it decreases only by ~1% (according to research),
  • Neodymium magnets prove to be highly resistant to loss of magnetic properties caused by external field sources,
  • Thanks to the metallic finish, the coating of nickel, gold, or silver-plated gives an modern appearance,
  • Magnetic induction on the working layer of the magnet remains extremely intense,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of accurate shaping and modifying to defined applications,
  • Significant place in electronics industry – they are used in HDD drives, brushless drives, medical devices, also other advanced devices.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding 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.
  • We recommend cover - magnetic mount, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these products are able to complicate diagnosis medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Pull force analysis

Detachment force of the magnet in optimal conditions – what it depends on?

Magnet power was determined for optimal configuration, assuming:
  • using a sheet made of high-permeability steel, serving as a magnetic yoke
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • characterized by lack of roughness
  • under conditions of no distance (surface-to-surface)
  • during detachment in a direction vertical to the plane
  • at conditions approx. 20°C

Lifting capacity in real conditions – factors

In real-world applications, the actual holding force results from several key aspects, presented from crucial:
  • Gap (between the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Metal type – different alloys reacts the same. High carbon content worsen the attraction effect.
  • Surface structure – the more even the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Temperature – heating the magnet causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate lowers the lifting capacity.

Safe handling of neodymium magnets
Caution required

Be careful. Neodymium magnets attract from a long distance and connect with huge force, often quicker than you can react.

Magnet fragility

Beware of splinters. Magnets can fracture upon violent connection, launching sharp fragments into the air. Wear goggles.

Serious injuries

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

Magnetic media

Equipment safety: Neodymium magnets can damage data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).

Power loss in heat

Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. This process is irreversible.

Keep away from electronics

A powerful magnetic field disrupts the functioning of magnetometers in smartphones and navigation systems. Do not bring magnets close to a device to avoid breaking the sensors.

Metal Allergy

Nickel alert: The nickel-copper-nickel coating contains nickel. If an allergic reaction occurs, immediately stop handling magnets and wear gloves.

Pacemakers

Life threat: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.

Mechanical processing

Mechanical processing of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Keep away from children

Adult use only. Tiny parts can be swallowed, causing intestinal necrosis. Store away from kids and pets.

Safety First! More info about hazards in the article: Safety of working with magnets.