← previous
next →
Product available Ships today (order by 14:00)

MW 40x8 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010069

GTIN/EAN: 5906301810681

5.00
Load capacity 20.43 kg / 200.39 N Magnetic Induction 230.22 mT / 2302 Gs
Diameter Ø
40 mm [±0,1 mm]
Height
8 mm [±0,1 mm]
Weight
75.4 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
product specifications »

31.27 zł with VAT / pcs + price for transport

25.42 zł net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
25.42 ZŁ
31.27 ZŁ
price from 30 pcs
23.89 ZŁ
29.39 ZŁ
price from 100 pcs
22.37 ZŁ
27.51 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety

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
Need advice?

Call us +48 22 499 98 98 if you prefer drop us a message using our online form the contact page.
Strength as well as shape of magnetic components can be analyzed using our magnetic calculator.

Orders placed before 14:00 will be shipped the same business day.

Technical - MW 40x8 / N38 - cylindrical magnet

Specification / characteristics - MW 40x8 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010069
GTIN/EAN 5906301810681
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 40 mm [±0,1 mm]
Height 8 mm [±0,1 mm]
Weight 75.4 g
Magnetization Direction ↑ axial
Load capacity ~ ? 20.43 kg / 200.39 N
Magnetic Induction ~ ? 230.22 mT / 2302 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 40x8 / 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

Physical simulation of the product - data

These values constitute the direct effect of a mathematical simulation. Results are based on models for the class Nd2Fe14B. Actual performance may differ from theoretical values. Use these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs gap) - power drop
MW 40x8 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2302 Gs
230.2 mT
 20.43 kg / 45.04 lbs
20430.0 g / 200.4 N
 crushing
1 mm 2235 Gs
223.5 mT
 19.25 kg / 42.44 lbs
19252.0 g / 188.9 N
 crushing
2 mm 2156 Gs
215.6 mT
 17.92 kg / 39.50 lbs
17917.4 g / 175.8 N
 crushing
3 mm 2068 Gs
206.8 mT
 16.49 kg / 36.36 lbs
16490.6 g / 161.8 N
 crushing
5 mm 1875 Gs
187.5 mT
 13.56 kg / 29.89 lbs
13556.7 g / 133.0 N
 crushing
10 mm 1375 Gs
137.5 mT
 7.29 kg / 16.07 lbs
7287.4 g / 71.5 N
 warning
15 mm 959 Gs
95.9 mT
 3.54 kg / 7.81 lbs
3542.3 g / 34.8 N
 warning
20 mm 661 Gs
66.1 mT
 1.68 kg / 3.71 lbs
1684.9 g / 16.5 N
 low risk
30 mm 328 Gs
32.8 mT
 0.41 kg / 0.91 lbs
414.2 g / 4.1 N
 low risk
50 mm 105 Gs
10.5 mT
 0.04 kg / 0.09 lbs
42.3 g / 0.4 N
 low risk
Magnetic force drops sharply with every mm of spacing. Note that even a microscopic distance (e.g., contamination, paint, veneer) significantly diminishes the holding power. Magnetic products work strongest at the point of direct contact; distance drastically cuts the power. Observe how flashily the load capacity drop, when the product does not touch flatly to the steel surface. When designing the assembly, eliminate redundant distances.

Table 2: Vertical load (wall)
MW 40x8 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 4.09 kg / 9.01 lbs
4086.0 g / 40.1 N
1 mm Stal (~0.2) 3.85 kg / 8.49 lbs
3850.0 g / 37.8 N
2 mm Stal (~0.2) 3.58 kg / 7.90 lbs
3584.0 g / 35.2 N
3 mm Stal (~0.2) 3.30 kg / 7.27 lbs
3298.0 g / 32.4 N
5 mm Stal (~0.2) 2.71 kg / 5.98 lbs
2712.0 g / 26.6 N
10 mm Stal (~0.2) 1.46 kg / 3.21 lbs
1458.0 g / 14.3 N
15 mm Stal (~0.2) 0.71 kg / 1.56 lbs
708.0 g / 6.9 N
20 mm Stal (~0.2) 0.34 kg / 0.74 lbs
336.0 g / 3.3 N
30 mm Stal (~0.2) 0.08 kg / 0.18 lbs
82.0 g / 0.8 N
50 mm Stal (~0.2) 0.01 kg / 0.02 lbs
8.0 g / 0.1 N
The table below calculates the theoretical weight limit sufficient to cause the slippage of the magnet downwards along a vertical steel plate (considering typical friction). This value is a function of the distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MW 40x8 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
6.13 kg / 13.51 lbs
6129.0 g / 60.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
4.09 kg / 9.01 lbs
4086.0 g / 40.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
2.04 kg / 4.50 lbs
2043.0 g / 20.0 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
10.22 kg / 22.52 lbs
10215.0 g / 100.2 N
When hanging a holder on a upright wall (e.g., a car body), it you can count on barely approx. 20%-30% of its maximum pull force. Gravitational force and a weak degree of grip mean that holders slide down faster than they detach. Designing a wall mount? Remember that the sliding force is much weaker than the maximum static pull force. On a smooth steel, the holder will slide down under a much lighter weight. Application of an anti-slip layer can effectively improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 40x8 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 1.02 kg / 2.25 lbs
1021.5 g / 10.0 N
1 mm
13%
 2.55 kg / 5.63 lbs
2553.8 g / 25.1 N
2 mm
25%
 5.11 kg / 11.26 lbs
5107.5 g / 50.1 N
3 mm
38%
 7.66 kg / 16.89 lbs
7661.3 g / 75.2 N
5 mm
63%
 12.77 kg / 28.15 lbs
12768.8 g / 125.3 N
10 mm
100%
 20.43 kg / 45.04 lbs
20430.0 g / 200.4 N
11 mm
100%
 20.43 kg / 45.04 lbs
20430.0 g / 200.4 N
12 mm
100%
 20.43 kg / 45.04 lbs
20430.0 g / 200.4 N
A too thin steel is unable to focus the full magnetic flux, which squanders power of the magnet. Should you mount a strong magnet to a weak sheet, the field will pass right through and the holding will be smaller. To squeeze 100% of this neodymium's power, you need a suitably thick element of metal. The saturation phenomenon causes that on thin elements (e.g., thin profiles), the magnet works worse. We advise picking the steel thickness from these parameters.

Table 5: Thermal stability (stability) - thermal limit
MW 40x8 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 20.43 kg / 45.04 lbs
20430.0 g / 200.4 N
 OK
40 °C -2.2% 19.98 kg / 44.05 lbs
19980.5 g / 196.0 N
 OK
60 °C -4.4% 19.53 kg / 43.06 lbs
19531.1 g / 191.6 N
80 °C -6.6% 19.08 kg / 42.07 lbs
19081.6 g / 187.2 N
100 °C -28.8% 14.55 kg / 32.07 lbs
14546.2 g / 142.7 N
Standard neodymium magnets change their properties parameters past the thermal threshold. Avoid high temperatures – excessive heat can irreversibly demagnetize this magnet. As the temperature rises, the magnet's capacity briefly lowers. Avoid using this product near heat sources higher than its operating temperature limit. Ignoring the limit will lead to permanent loss of magnetic properties.
*Technical advisory: Thermal stability depends not only on the material grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) may lose charge permanently under lower heat stress than taller cylinders. The danger warning in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 40x8 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 41.05 kg / 90.51 lbs
3 871 Gs
6.16 kg / 13.58 lbs
6158 g / 60.4 N
 N/A
1 mm 39.92 kg / 88.02 lbs
4 540 Gs
5.99 kg / 13.20 lbs
5989 g / 58.7 N
 35.93 kg / 79.22 lbs
~0 Gs
2 mm 38.69 kg / 85.29 lbs
4 469 Gs
5.80 kg / 12.79 lbs
5803 g / 56.9 N
 34.82 kg / 76.76 lbs
~0 Gs
3 mm 37.38 kg / 82.40 lbs
4 393 Gs
5.61 kg / 12.36 lbs
5606 g / 55.0 N
 33.64 kg / 74.16 lbs
~0 Gs
5 mm 34.59 kg / 76.25 lbs
4 226 Gs
5.19 kg / 11.44 lbs
5188 g / 50.9 N
 31.13 kg / 68.63 lbs
~0 Gs
10 mm 27.24 kg / 60.06 lbs
3 750 Gs
4.09 kg / 9.01 lbs
4086 g / 40.1 N
 24.52 kg / 54.05 lbs
~0 Gs
20 mm 14.64 kg / 32.28 lbs
2 750 Gs
2.20 kg / 4.84 lbs
2197 g / 21.5 N
 13.18 kg / 29.06 lbs
~0 Gs
50 mm 1.65 kg / 3.63 lbs
922 Gs
0.25 kg / 0.54 lbs
247 g / 2.4 N
 1.48 kg / 3.26 lbs
~0 Gs
60 mm 0.83 kg / 1.84 lbs
656 Gs
0.12 kg / 0.28 lbs
125 g / 1.2 N
 0.75 kg / 1.65 lbs
~0 Gs
70 mm 0.44 kg / 0.97 lbs
477 Gs
0.07 kg / 0.15 lbs
66 g / 0.6 N
 0.40 kg / 0.87 lbs
~0 Gs
80 mm 0.24 kg / 0.54 lbs
355 Gs
0.04 kg / 0.08 lbs
37 g / 0.4 N
 0.22 kg / 0.49 lbs
~0 Gs
90 mm 0.14 kg / 0.31 lbs
270 Gs
0.02 kg / 0.05 lbs
21 g / 0.2 N
 0.13 kg / 0.28 lbs
~0 Gs
100 mm 0.09 kg / 0.19 lbs
210 Gs
0.01 kg / 0.03 lbs
13 g / 0.1 N
 0.08 kg / 0.17 lbs
~0 Gs
Two magnets interact from a wider radius than a magnet and steel combination. The connection of magnet-to-magnet generates a stronger field and a further horizon of performance. Want to build a strong closure? Apply two magnets instead of one magnet and a striker plate. Be careful that when attracting two neodymiums, the impact force is huge. The repulsion force is a bit weaker than the connection force, but still significant.
*Field value for N-N configuration is approximately ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
* Calculations refer to friction force of dual same magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 40x8 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 15.5 cm
Hearing aid 10 Gs (1.0 mT) 12.5 cm
Timepiece 20 Gs (2.0 mT) 9.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 7.5 cm
Car key 50 Gs (5.0 mT) 7.0 cm
Payment card 400 Gs (40.0 mT) 3.0 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm
Extremely neodym field is a large risk to electronics as well as pacemakers. These neodymiums produce a field that destroys function of sensitive medical devices. Notice: the invisible magnetic field penetrates the body and housings. Increased vigilance must be exercised by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, remotes, speakers, and displays. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - warning
MW 40x8 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 21.48 km/h
(5.97 m/s)
 1.34 J
30 mm 24.93 km/h
(6.93 m/s)
 1.81 J
50 mm 25.14 km/h
(6.98 m/s)
 1.84 J
100 mm 25.18 km/h
(6.99 m/s)
 1.84 J
NdFeB products are delicate – a collision with steel risks their cracking. Pay attention to connection velocity – a magnet released freely becomes dangerous. Impact energy can trigger coating fragments or dangerous crushing to skin. Always hold the magnet during bringing near metal so it doesn't slam with momentum 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 40x8 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MW 40x8 / N38

Parameter Value SI Unit / Description
Magnetic Flux 33 553 Mx 335.5 µWb
Pc Coefficient 0.29 Low (Flat)
Total magnetic flux emitted by the magnet pole. Key data when building generators as well as sensors. Pc value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 40x8 / N38

Environment Effective steel pull Effect
Air (land) 20.43 kg Standard
Water (riverbed) 23.39 kg
(+2.96 kg buoyancy gain)
+14.5%
Rust risk: 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. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Wall mount (shear)

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

2. Plate thickness effect

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

3. Heat tolerance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.29

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%

Sustainability

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010069-2026
Magnet Unit Converter

Pulling force

Field Strength

Insert your figure in any box, and the remaining units will update instantly.

Check out also deals

MPL 40x20x5 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 40x20x5 / N38 - lamellar magnet

12.24 zł brutto / pcs
MPL 60x20x10 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 60x20x10 / N38 - lamellar magnet

68.27 zł brutto / pcs
SMZR 32x175 / N52 - magnetic separator with handle
Product available Ships today (order by 14:00)

SMZR 32x175 / N52 - magnetic separator with handle

651.90 zł brutto / pcs
SM 32x500 [2xM8] / N42 - magnetic separator
Product available Ships today (order by 14:00)

SM 32x500 [2xM8] / N42 - magnetic separator

1488.30 zł brutto / pcs
The offered product is an extremely powerful cylindrical magnet, produced from durable NdFeB material, which, at dimensions of Ø40x8 mm, guarantees the highest energy density. This specific item is characterized by a tolerance of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 20.43 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Additionally, its triple-layer 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 DIY projects, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 200.39 N with a weight of only 75.4 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 40.1 mm) using epoxy glues. To ensure stability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets N38 are strong enough for the majority 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 (Ø40x8), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 40 mm and height 8 mm. The key parameter here is the lifting capacity amounting to approximately 20.43 kg (force ~200.39 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 8 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Strengths and weaknesses of rare earth magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have constant strength, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • They are extremely resistant to demagnetization induced by external disturbances,
  • Thanks to the glossy finish, the surface of Ni-Cu-Ni, gold-plated, or silver-plated gives an elegant appearance,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a key feature,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
  • Possibility of detailed shaping and adjusting to concrete conditions,
  • Fundamental importance in advanced technology sectors – they are used in data components, electric motors, diagnostic systems, as well as complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Problematic aspects of neodymium magnets: weaknesses and usage proposals
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects 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 suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We recommend a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated shapes.
  • Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, small elements of these devices can complicate diagnosis medical when they are in the body.
  • Due to expensive raw materials, their price is relatively high,

Lifting parameters

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

The specified lifting capacity represents the limit force, measured under optimal environment, specifically:
  • with the application of a yoke made of low-carbon steel, ensuring maximum field concentration
  • with a cross-section of at least 10 mm
  • characterized by even structure
  • under conditions of gap-free contact (surface-to-surface)
  • during detachment in a direction vertical to the plane
  • at conditions approx. 20°C

Determinants of practical lifting force of a magnet

In real-world applications, the real power depends on a number of factors, presented from crucial:
  • Air gap (betwixt the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Direction of force – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the surface is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin plate does not accept the full field, causing part of the flux to be wasted into the air.
  • Plate material – mild steel attracts best. Alloy steels reduce magnetic properties and holding force.
  • Smoothness – full contact is possible only on polished steel. Rough texture create air cushions, reducing force.
  • Temperature influence – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was determined using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate decreases the holding force.

H&S for magnets
Magnets are brittle

Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Do not give to children

Neodymium magnets are not toys. Swallowing multiple magnets can lead to them attracting across intestines, which constitutes a direct threat to life and necessitates immediate surgery.

Operating temperature

Watch the temperature. Exposing the magnet to high heat will ruin its magnetic structure and pulling force.

Compass and GPS

GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Hand protection

Danger of trauma: The attraction force is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.

Warning for heart patients

People with a heart stimulator should maintain an absolute distance from magnets. The magnetic field can interfere with the operation of the implant.

Flammability

Dust created during machining of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Protect data

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

Warning for allergy sufferers

Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness occurs, cease handling magnets and use protective gear.

Handling guide

Exercise caution. Neodymium magnets act from a distance and snap with massive power, often quicker than you can react.

Security! Details about hazards in the article: Magnet Safety Guide.