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

MW 20x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010041

GTIN/EAN: 5906301810407

5.00

Diameter Ø

20 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

4.71 g

Magnetization Direction

↑ axial

Load capacity

1.63 kg / 16.02 N

Magnetic Induction

121.57 mT / 1216 Gs

Coating

[NiCuNi] Nickel

see parameters »

2.08 ZŁ with VAT / pcs + price for transport

1.690 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
1.690 ZŁ
2.08 ZŁ
price from 400 pcs
1.589 ZŁ
1.954 ZŁ
price from 1500 pcs
1.487 ZŁ
1.829 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Looking for a better price?

Give us a call +48 888 99 98 98 otherwise let us know through form the contact form page.
Force as well as appearance of magnets can be reviewed with our online calculation tool.

Orders submitted before 14:00 will be dispatched today!

Technical parameters - MW 20x2 / N38 - cylindrical magnet

Specification / characteristics - MW 20x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010041
GTIN/EAN 5906301810407
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 20 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 4.71 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.63 kg / 16.02 N
Magnetic Induction ~ ? 121.57 mT / 1216 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x2 / 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 modeling of the magnet - report

The following data constitute the result of a physical simulation. Results rely on models for the material Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Use these calculations as a supplementary guide when designing systems.

Table 1: Static pull force (force vs distance) - characteristics
MW 20x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1216 Gs
121.6 mT
 1.63 kg / 3.59 pounds
1630.0 g / 16.0 N
 low risk
1 mm 1165 Gs
116.5 mT
 1.50 kg / 3.30 pounds
1496.3 g / 14.7 N
 low risk
2 mm 1087 Gs
108.7 mT
 1.30 kg / 2.87 pounds
1302.7 g / 12.8 N
 low risk
3 mm 991 Gs
99.1 mT
 1.08 kg / 2.39 pounds
1083.7 g / 10.6 N
 low risk
5 mm 783 Gs
78.3 mT
 0.68 kg / 1.49 pounds
675.9 g / 6.6 N
 low risk
10 mm 379 Gs
37.9 mT
 0.16 kg / 0.35 pounds
158.4 g / 1.6 N
 low risk
15 mm 185 Gs
18.5 mT
 0.04 kg / 0.08 pounds
37.9 g / 0.4 N
 low risk
20 mm 99 Gs
9.9 mT
 0.01 kg / 0.02 pounds
10.8 g / 0.1 N
 low risk
30 mm 36 Gs
3.6 mT
 0.00 kg / 0.00 pounds
1.4 g / 0.0 N
 low risk
50 mm 9 Gs
0.9 mT
 0.00 kg / 0.00 pounds
0.1 g / 0.0 N
 low risk
Magnetic force decreases sharply with every mm of spacing. Note that even the smallest gap (e.g., contamination, paint, dust) strongly reduces the pull force. Neodymiums work most effectively at the point of direct contact; air break kills the power. Notice how rapidly the parameters plummet, when the product does not adhere flatly to the metal substrate. When calculating the arrangement, avoid unnecessary gaps.

Table 2: Sliding hold (wall)
MW 20x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.33 kg / 0.72 pounds
326.0 g / 3.2 N
1 mm Stal (~0.2) 0.30 kg / 0.66 pounds
300.0 g / 2.9 N
2 mm Stal (~0.2) 0.26 kg / 0.57 pounds
260.0 g / 2.6 N
3 mm Stal (~0.2) 0.22 kg / 0.48 pounds
216.0 g / 2.1 N
5 mm Stal (~0.2) 0.14 kg / 0.30 pounds
136.0 g / 1.3 N
10 mm Stal (~0.2) 0.03 kg / 0.07 pounds
32.0 g / 0.3 N
15 mm Stal (~0.2) 0.01 kg / 0.02 pounds
8.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
The table below presents the estimated force sufficient to start the downward movement of the magnet vertically along a upright metal surface (considering typical friction coefficient). This parameter depends on the gap size between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MW 20x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.49 kg / 1.08 pounds
489.0 g / 4.8 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.33 kg / 0.72 pounds
326.0 g / 3.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.16 kg / 0.36 pounds
163.0 g / 1.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.82 kg / 1.80 pounds
815.0 g / 8.0 N
When mounting a element on a vertical surface (e.g., a fridge), it will only hold just approx. 20%-30% of nominal attraction strength. Gravity as well as a low friction coefficient mean that products slip faster than they pull off. Want to create a hanger? Note that the shear force is noticeably lower than the maximum static pull force. On a smooth steel, the magnet will slide down under a much lighter weight. Utilizing a rubberized layer can significantly increase the grip.

Table 4: Material efficiency (saturation) - power losses
MW 20x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.16 kg / 0.36 pounds
163.0 g / 1.6 N
1 mm
25%
 0.41 kg / 0.90 pounds
407.5 g / 4.0 N
2 mm
50%
 0.82 kg / 1.80 pounds
815.0 g / 8.0 N
3 mm
75%
 1.22 kg / 2.70 pounds
1222.5 g / 12.0 N
5 mm
100%
 1.63 kg / 3.59 pounds
1630.0 g / 16.0 N
10 mm
100%
 1.63 kg / 3.59 pounds
1630.0 g / 16.0 N
11 mm
100%
 1.63 kg / 3.59 pounds
1630.0 g / 16.0 N
12 mm
100%
 1.63 kg / 3.59 pounds
1630.0 g / 16.0 N
A too thin steel is incapable of focus the full magnetic flux, which wastes potential of the holder. Should you install a neodymium to a too thin substrate, the flux will penetrate right through and the pull force will drop sharply. To achieve 100% of this magnet's power, you require a sufficiently solid backing of steel. The material oversaturation causes that on delicate walls (e.g., appliance housings), the magnet works worse. We suggest choosing the steel dimension according to the table below.

Table 5: Thermal stability (material behavior) - power drop
MW 20x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.63 kg / 3.59 pounds
1630.0 g / 16.0 N
 OK
40 °C -2.2% 1.59 kg / 3.51 pounds
1594.1 g / 15.6 N
 OK
60 °C -4.4% 1.56 kg / 3.44 pounds
1558.3 g / 15.3 N
80 °C -6.6% 1.52 kg / 3.36 pounds
1522.4 g / 14.9 N
100 °C -28.8% 1.16 kg / 2.56 pounds
1160.6 g / 11.4 N
Ordinary NdFeB products irreversibly lose strength above the temperature limit. Protect against heat – excessive heat can permanently damage this magnet. With every degree above norm, the magnet's force temporarily drops. Avoid using this product close to ovens exceeding its working range. Too high temperature will lead to permanent loss of magnetism.
*Technical advisory: Heat tolerance is determined by both grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures than taller cylinders. The danger warning in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MW 20x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.86 kg / 6.31 pounds
2 301 Gs
0.43 kg / 0.95 pounds
429 g / 4.2 N
 N/A
1 mm 2.76 kg / 6.09 pounds
2 388 Gs
0.41 kg / 0.91 pounds
414 g / 4.1 N
 2.49 kg / 5.48 pounds
~0 Gs
2 mm 2.63 kg / 5.79 pounds
2 329 Gs
0.39 kg / 0.87 pounds
394 g / 3.9 N
 2.36 kg / 5.21 pounds
~0 Gs
3 mm 2.47 kg / 5.44 pounds
2 257 Gs
0.37 kg / 0.82 pounds
370 g / 3.6 N
 2.22 kg / 4.89 pounds
~0 Gs
5 mm 2.10 kg / 4.62 pounds
2 081 Gs
0.31 kg / 0.69 pounds
315 g / 3.1 N
 1.89 kg / 4.16 pounds
~0 Gs
10 mm 1.19 kg / 2.62 pounds
1 565 Gs
0.18 kg / 0.39 pounds
178 g / 1.7 N
 1.07 kg / 2.35 pounds
~0 Gs
20 mm 0.28 kg / 0.61 pounds
758 Gs
0.04 kg / 0.09 pounds
42 g / 0.4 N
 0.25 kg / 0.55 pounds
~0 Gs
50 mm 0.01 kg / 0.01 pounds
115 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.01 pounds
72 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
48 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
33 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
24 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
18 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two magnetic products interact from a wider radius than a magnet and steel combination. Such a system of magnet-to-magnet creates a more powerful interaction and a further horizon of action. Want to build a solid fastener? Apply two magnets instead of one magnet and a steel. Exercise caution that when bringing together two magnets, the impact force is extreme. The levitation is marginally weaker than the attraction, but still impressive.
*Flux density for N-N configuration reaches ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
Important: Figures demonstrate shear force of dual identical magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
MW 20x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.5 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Timepiece 20 Gs (2.0 mT) 4.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.0 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
A strong magnetic field is a real danger to electronics as well as medical implants. These NdFeB products produce a flux that destroys function of digital equipment. Remember: the unseen radiation acts through matter and plastic. 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 precise measuring instruments.

Table 8: Impact energy (kinetic energy) - warning
MW 20x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 19.87 km/h
(5.52 m/s)
 0.07 J
30 mm 32.51 km/h
(9.03 m/s)
 0.19 J
50 mm 41.95 km/h
(11.65 m/s)
 0.32 J
100 mm 59.33 km/h
(16.48 m/s)
 0.64 J
Neodymium magnets are very brittle – a violent impact against metal can result in shattering. Control the attraction moment – a neodymium left loose becomes dangerous. Kinetic force can destroy the magnet or painful pinches to skin. Always hold the magnet during installation so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear eye protection when working with large magnets.

Table 9: Coating parameters (durability)
MW 20x2 / 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: Construction data (Pc)
MW 20x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 038 Mx 50.4 µWb
Pc Coefficient 0.16 Low (Flat)
Flux value emitted by the magnet pole. Essential parameter when building generators and motors. Pc value defines the working geometry.

Table 11: Physics of underwater searching
MW 20x2 / N38

Environment Effective steel pull Effect
Air (land) 1.63 kg Standard
Water (riverbed) 1.87 kg
(+0.24 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!
Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains only ~20% of its nominal pull.

2. Efficiency vs thickness

*Thin steel (e.g. computer case) severely reduces the holding force.

3. Power loss vs temp

*For N38 material, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.16

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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: 010041-2026
Measurement Calculator
Magnet pull force
Field Strength
Input a value in a box, and the rest change instantly.

View more products

MP 14x8/4x3 / N38 - ring magnet
Product available Ships today (order by 14:00)

MP 14x8/4x3 / N38 - ring magnet

2.47 ZŁ brutto / pcs
MPL 40x15x5x2[7/3.5] / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 40x15x5x2[7/3.5] / N38 - lamellar magnet

15.07 ZŁ brutto / pcs
MW 70x20 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 70x20 / N38 - cylindrical magnet

239.85 ZŁ brutto / pcs
MPL 42x20x5 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 42x20x5 / N38 - lamellar magnet

15.62 ZŁ brutto / pcs
The presented product is a very strong rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø20x2 mm, guarantees optimal power. This specific item features high dimensional repeatability and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 1.63 kg), this product is available off-the-shelf from our warehouse in Poland, 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.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 16.02 N with a weight of only 4.71 g, this rod is indispensable in electronics and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure long-term durability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable for the majority of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø20x2), 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 Ø20x2 mm, which, at a weight of 4.71 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 1.63 kg (force ~16.02 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 20 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 through the diameter if your project requires it.

Advantages and disadvantages of rare earth magnets.

Advantages

Besides their immense magnetic power, neodymium magnets offer the following advantages:
  • Their strength remains stable, and after around 10 years it drops only by ~1% (according to research),
  • They do not lose their magnetic properties even under external field action,
  • Thanks to the metallic finish, the coating of Ni-Cu-Ni, gold, or silver-plated gives an professional appearance,
  • Magnetic induction on the surface of the magnet remains very high,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to the potential of flexible forming and adaptation to individualized solutions, neodymium magnets can be modeled in a wide range of geometric configurations, which expands the range of possible applications,
  • Huge importance in electronics industry – they are utilized in computer drives, motor assemblies, medical devices, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in compact constructions

Cons

Disadvantages of NdFeB magnets:
  • At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of producing threads in the magnet and complex forms - recommended is casing - mounting mechanism.
  • Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small components of these devices can disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Highest magnetic holding force – what it depends on?

The load parameter shown concerns the limit force, recorded under ideal test conditions, meaning:
  • with the application of a yoke made of low-carbon steel, ensuring full magnetic saturation
  • possessing a thickness of at least 10 mm to ensure full flux closure
  • with an ideally smooth contact surface
  • with zero gap (no coatings)
  • during detachment in a direction vertical to the plane
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

In real-world applications, the real power results from many variables, presented from the most important:
  • Distance – existence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Steel thickness – insufficiently thick steel causes magnetic saturation, causing part of the power to be lost to the other side.
  • Material composition – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which increases force. Uneven metal reduce efficiency.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate decreases the lifting capacity.

Safe handling of NdFeB magnets
Do not drill into magnets

Mechanical processing of NdFeB material carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Material brittleness

Neodymium magnets are ceramic materials, which means they are prone to chipping. Collision of two magnets leads to them breaking into small pieces.

Thermal limits

Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.

Allergy Warning

Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation appears, cease handling magnets and use protective gear.

Phone sensors

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

Data carriers

Do not bring magnets close to a purse, computer, or screen. The magnetism can permanently damage these devices and erase data from cards.

Finger safety

Big blocks can crush fingers in a fraction of a second. Never place your hand betwixt two strong magnets.

Do not give to children

NdFeB magnets are not toys. Eating a few magnets can lead to them attracting across intestines, which poses a direct threat to life and necessitates immediate surgery.

Warning for heart patients

Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Handling guide

Before use, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Important! Learn more about risks in the article: Magnet Safety Guide.