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MW 25x5 / N38AH - cylindrical magnet

cylindrical magnet

Catalog no 010501

GTIN/EAN: 5906301814993

Load capacity 7.29 kg / 71.47 N Magnetic Induction 219.99 mT / 2200 Gs
Diameter Ø
25 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
18.41 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

see parameters »

13.56 zł net / pcs

16.68 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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Technical parameters of the product - MW 25x5 / N38AH - cylindrical magnet

Specification / characteristics - MW 25x5 / N38AH - cylindrical magnet

properties
properties values
Cat. no. 010501
GTIN/EAN 5906301814993
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 25 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 18.41 g
Magnetization Direction ↑ axial
Load capacity ~ ? 7.29 kg / 71.47 N
Magnetic Induction ~ ? 219.99 mT / 2200 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38AH

Specification / characteristics MW 25x5 / N38AH - cylindrical magnet
properties values units
Remanence Br ? 12.2-12.5 kGs
Remanence Br ? 1120-1250 mT
Coercivity bHc ? ≥ 11.3 kOe
Coercivity bHc ? ≥ 899 kA/m
Intrinsic coercivity iHc ≥ 33 kOe
Intrinsic coercivity iHc ≥ 2624 kA/m
Energy product BHmax ? 36-39 BH max MGOe
Energy product BHmax ? 287-310 BH max KJ/m
Maximum working temperature ? ≤ 230 °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

Physical simulation of the product - report

The following values represent the direct effect of a engineering calculation. Results rely on models for the class Nd2Fe14B. Real-world performance might slightly differ. Treat these data as a supplementary guide during assembly planning.

Table 1: Static pull force (force vs gap) - interaction chart
MW 25x5 / N38AH

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2292 Gs
229.2 mT
 7.29 kg / 16.07 pounds
7290.0 g / 71.5 N
 warning
1 mm 2180 Gs
218.0 mT
 6.59 kg / 14.53 pounds
6591.0 g / 64.7 N
 warning
2 mm 2042 Gs
204.2 mT
 5.78 kg / 12.75 pounds
5782.0 g / 56.7 N
 warning
3 mm 1888 Gs
188.8 mT
 4.94 kg / 10.90 pounds
4942.8 g / 48.5 N
 warning
5 mm 1564 Gs
156.4 mT
 3.39 kg / 7.48 pounds
3394.1 g / 33.3 N
 warning
10 mm 886 Gs
88.6 mT
 1.09 kg / 2.40 pounds
1089.7 g / 10.7 N
 low risk
15 mm 493 Gs
49.3 mT
 0.34 kg / 0.74 pounds
336.7 g / 3.3 N
 low risk
20 mm 287 Gs
28.7 mT
 0.11 kg / 0.25 pounds
114.0 g / 1.1 N
 low risk
30 mm 115 Gs
11.5 mT
 0.02 kg / 0.04 pounds
18.4 g / 0.2 N
 low risk
50 mm 31 Gs
3.1 mT
 0.00 kg / 0.00 pounds
1.3 g / 0.0 N
 low risk
Pulling power drops drastically with every mm of gap. Note that every additional insulation layer (e.g., dirt, paint, dust) noticeably reduces the pull force. Magnetic products hold most effectively during direct contact; distance kills the force. See how quickly the parameters drop, when the product does not touch directly to the metal substrate. When designing the mounting, eliminate additional spacers.

Table 2: Shear capacity (vertical surface)
MW 25x5 / N38AH

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.46 kg / 3.21 pounds
1458.0 g / 14.3 N
1 mm Stal (~0.2) 1.32 kg / 2.91 pounds
1318.0 g / 12.9 N
2 mm Stal (~0.2) 1.16 kg / 2.55 pounds
1156.0 g / 11.3 N
3 mm Stal (~0.2) 0.99 kg / 2.18 pounds
988.0 g / 9.7 N
5 mm Stal (~0.2) 0.68 kg / 1.49 pounds
678.0 g / 6.7 N
10 mm Stal (~0.2) 0.22 kg / 0.48 pounds
218.0 g / 2.1 N
15 mm Stal (~0.2) 0.07 kg / 0.15 pounds
68.0 g / 0.7 N
20 mm Stal (~0.2) 0.02 kg / 0.05 pounds
22.0 g / 0.2 N
30 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
This section calculates the approximate holding capacity sufficient to cause the downward movement of the magnet vertically on a vertical steel wall (considering typical friction coefficient). This value is relative to the distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 25x5 / N38AH

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.19 kg / 4.82 pounds
2187.0 g / 21.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.46 kg / 3.21 pounds
1458.0 g / 14.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.73 kg / 1.61 pounds
729.0 g / 7.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.65 kg / 8.04 pounds
3645.0 g / 35.8 N
When mounting a element on a vertical plane (e.g., a car body), it you can count on only about 1/5 of nominal attraction strength. Gravitational force as well as a weak degree of grip cause that magnets slide down faster than they pull off. Want to create a wall mount? Consider that the shear force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the element will slide down under a significantly smaller weight. Utilizing a rubberized layer can drastically increase the grip.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 25x5 / N38AH

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.73 kg / 1.61 pounds
729.0 g / 7.2 N
1 mm
25%
 1.82 kg / 4.02 pounds
1822.5 g / 17.9 N
2 mm
50%
 3.65 kg / 8.04 pounds
3645.0 g / 35.8 N
3 mm
75%
 5.47 kg / 12.05 pounds
5467.5 g / 53.6 N
5 mm
100%
 7.29 kg / 16.07 pounds
7290.0 g / 71.5 N
10 mm
100%
 7.29 kg / 16.07 pounds
7290.0 g / 71.5 N
11 mm
100%
 7.29 kg / 16.07 pounds
7290.0 g / 71.5 N
12 mm
100%
 7.29 kg / 16.07 pounds
7290.0 g / 71.5 N
A thin metal plate is not enough to take in the full magnetic flux, which squanders power of the magnet. If you install a neodymium to a too thin substrate, the magnetism will penetrate right through and the holding will be smaller. To achieve full efficiency of this neodymium's power, you require a sufficiently solid element of metal. The saturation phenomenon causes that on delicate walls (e.g., thin profiles), the product works worse. We suggest choosing the steel dimension according to the table below.

Table 5: Thermal stability (material behavior) - resistance threshold
MW 25x5 / N38AH

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 7.29 kg / 16.07 pounds
7290.0 g / 71.5 N
 OK
80 °C -6.6% 6.81 kg / 15.01 pounds
6808.9 g / 66.8 N
150 °C -14.3% 6.25 kg / 13.77 pounds
6247.5 g / 61.3 N
200 °C -19.8% 5.85 kg / 12.89 pounds
5846.6 g / 57.4 N
230 °C -23.1% 5.61 kg / 12.36 pounds
5606.0 g / 55.0 N
250 °C -45.3% 3.99 kg / 8.79 pounds
3987.6 g / 39.1 N
Ordinary NdFeB products change their properties power after exceeding the maximum temperature. Watch out for overheating – heat can irreversibly destroy this product. As the temperature rises, the magnet's power momentarily decreases. Refrain from using this product near heat sources exceeding its operating temperature limit. Exceeding the critical threshold will cause permanent loss of magnetism.
*Technical advisory: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) are more susceptible to demagnetization sooner compared to rod magnets. Red status in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - forces in the system
MW 25x5 / N38AH

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 15.90 kg / 35.06 pounds
3 855 Gs
2.39 kg / 5.26 pounds
2385 g / 23.4 N
 N/A
1 mm 15.19 kg / 33.48 pounds
4 480 Gs
2.28 kg / 5.02 pounds
2278 g / 22.3 N
 13.67 kg / 30.13 pounds
~0 Gs
2 mm 14.38 kg / 31.70 pounds
4 359 Gs
2.16 kg / 4.75 pounds
2157 g / 21.2 N
 12.94 kg / 28.53 pounds
~0 Gs
3 mm 13.51 kg / 29.79 pounds
4 226 Gs
2.03 kg / 4.47 pounds
2027 g / 19.9 N
 12.16 kg / 26.81 pounds
~0 Gs
5 mm 11.70 kg / 25.79 pounds
3 932 Gs
1.75 kg / 3.87 pounds
1755 g / 17.2 N
 10.53 kg / 23.21 pounds
~0 Gs
10 mm 7.40 kg / 16.32 pounds
3 128 Gs
1.11 kg / 2.45 pounds
1111 g / 10.9 N
 6.66 kg / 14.69 pounds
~0 Gs
20 mm 2.38 kg / 5.24 pounds
1 773 Gs
0.36 kg / 0.79 pounds
357 g / 3.5 N
 2.14 kg / 4.72 pounds
~0 Gs
50 mm 0.09 kg / 0.21 pounds
354 Gs
0.01 kg / 0.03 pounds
14 g / 0.1 N
 0.09 kg / 0.19 pounds
~0 Gs
60 mm 0.04 kg / 0.09 pounds
231 Gs
0.01 kg / 0.01 pounds
6 g / 0.1 N
 0.04 kg / 0.08 pounds
~0 Gs
70 mm 0.02 kg / 0.04 pounds
157 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
 0.02 kg / 0.04 pounds
~0 Gs
80 mm 0.01 kg / 0.02 pounds
112 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.01 kg / 0.01 pounds
82 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.01 pounds
62 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two strong neodymiums interact from a much further distance than a neodymium and metal setup. The connection of two magnets generates a stronger field and a larger range of operation. Want to build a powerful holder? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the collision energy is huge. The repulsion force is slightly lower than the connection force, but still significant.
*Flux density for N-N configuration drops to ~0 Gs at the geometric center between the magnets (due to field cancellation).
Important: Results apply to shear force of dual same magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - warnings
MW 25x5 / N38AH

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 10.0 cm
Hearing aid 10 Gs (1.0 mT) 7.5 cm
Mechanical watch 20 Gs (2.0 mT) 6.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 5.0 cm
Remote 50 Gs (5.0 mT) 4.5 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm
A strong magnetic field poses a real danger to electronics and pacemakers. These neodymiums generate a flux that destroys function of digital equipment. Notice: the invisible magnetic field penetrates the body and glass. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, car keys, membranes, and screens. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MW 25x5 / N38AH

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.63 km/h
(6.29 m/s)
 0.36 J
30 mm 24.03 km/h
(6.67 m/s)
 0.41 J
50 mm 24.06 km/h
(6.68 m/s)
 0.41 J
100 mm 24.07 km/h
(6.69 m/s)
 0.41 J
NdFeB products are prone to chipping – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or painful pinches to skin. Be sure to control the product during mounting so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Use safety goggles when handling with powerful specimens.

Table 9: Corrosion resistance
MW 25x5 / N38AH

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)
The following table defines the conditions under which this product can be safely used. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Pc)
MW 25x5 / N38AH

Parameter Value SI Unit / Description
Magnetic Flux 13 054 Mx 130.5 µWb
Pc Coefficient 0.29 Low (Flat)
Flux value emitted by the pole surface. Essential parameter for generator designers and motors. Pc value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 25x5 / N38AH

Environment Effective steel pull Effect
Air (land) 7.29 kg Standard
Water (riverbed) 8.35 kg
(+1.06 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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Note: On a vertical wall, the magnet holds merely approx. 20-30% of its perpendicular strength.

2. Steel saturation

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

3. Thermal stability

*For standard magnets, 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

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.

Engineering data and GPSR

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%

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: 010501-2026
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The offered product is an extremely powerful cylinder magnet, produced from durable NdFeB material, which, at dimensions of Ø25x5 mm, guarantees optimal power. This specific item features a tolerance of ±0.1mm and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 7.29 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 71.47 N with a weight of only 18.41 g, this rod is indispensable in miniature devices 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., 25.1 mm) using epoxy glues. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø25x5), 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 25 mm and height 5 mm. The key parameter here is the lifting capacity amounting to approximately 7.29 kg (force ~71.47 N), which, with such defined dimensions, proves the high grade 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 25 mm. 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.

Strengths as well as weaknesses of rare earth magnets.

Benefits

Apart from their strong holding force, neodymium magnets have these key benefits:
  • They do not lose power, even during around 10 years – the reduction in strength is only ~1% (theoretically),
  • They are extremely resistant to demagnetization induced by external magnetic fields,
  • A magnet with a shiny silver surface has an effective appearance,
  • Magnets are characterized by impressive magnetic induction on the outer side,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Possibility of exact machining as well as adjusting to complex requirements,
  • Key role in advanced technology sectors – they are commonly used in computer drives, electromotive mechanisms, diagnostic systems, as well as industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We recommend cover - magnetic mount, due to difficulties in creating threads inside the magnet and complex shapes.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, small components of these magnets are able to complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum holding power of the magnet – what affects it?

The lifting capacity listed is a result of laboratory testing performed under specific, ideal conditions:
  • with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
  • with a thickness of at least 10 mm
  • with an polished contact surface
  • with direct contact (without paint)
  • under vertical force vector (90-degree angle)
  • at conditions approx. 20°C

What influences lifting capacity in practice

Effective lifting capacity impacted by specific conditions, such as (from priority):
  • Clearance – existence of any layer (paint, dirt, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Chemical composition of the base – low-carbon steel gives the best results. Alloy admixtures lower magnetic properties and holding force.
  • Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
  • Thermal environment – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets
Powerful field

Handle with care. Rare earth magnets attract from a long distance and snap with huge force, often quicker than you can move away.

Permanent damage

Avoid heat. Neodymium magnets are sensitive to temperature. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Adults only

Only for adults. Small elements pose a choking risk, leading to intestinal necrosis. Keep out of reach of kids and pets.

Data carriers

Device Safety: Neodymium magnets can damage payment cards and delicate electronics (heart implants, hearing aids, mechanical watches).

Sensitization to coating

Studies show that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, prevent touching magnets with bare hands and select encased magnets.

Phone sensors

An intense magnetic field interferes with the functioning of compasses in phones and GPS navigation. Do not bring magnets close to a device to avoid breaking the sensors.

Medical implants

For implant holders: Powerful magnets disrupt medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

Fragile material

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

Do not drill into magnets

Machining of neodymium magnets poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Pinching danger

Large magnets can crush fingers instantly. Do not place your hand betwixt two attracting surfaces.

Warning! Want to know more? Check our post: Why are neodymium magnets dangerous?