← previous
next →
Product available Ships tomorrow

MW 20x2.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010042

GTIN/EAN: 5906301810414

5.00

Diameter Ø

20 mm [±0,1 mm]

Height

2.5 mm [±0,1 mm]

Weight

5.89 g

Magnetization Direction

↑ axial

Load capacity

2.41 kg / 23.63 N

Magnetic Induction

150.34 mT / 1503 Gs

Coating

[NiCuNi] Nickel

technical details »

3.01 ZŁ with VAT / pcs + price for transport

2.45 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
2.45 ZŁ
3.01 ZŁ
price from 250 pcs
2.30 ZŁ
2.83 ZŁ
price from 1050 pcs
2.16 ZŁ
2.65 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
Hunting for a discount?

Give us a call +48 888 99 98 98 alternatively get in touch by means of request form through our site.
Lifting power along with appearance of a neodymium magnet can be calculated on our force calculator.

Same-day processing for orders placed before 14:00.

Technical details - MW 20x2.5 / N38 - cylindrical magnet

Specification / characteristics - MW 20x2.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010042
GTIN/EAN 5906301810414
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 2.5 mm [±0,1 mm]
Weight 5.89 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.41 kg / 23.63 N
Magnetic Induction ~ ? 150.34 mT / 1503 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x2.5 / 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 simulation of the assembly - report

Presented values constitute the outcome of a physical analysis. Values are based on models for the class Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Treat these calculations as a supplementary guide for designers.

Table 1: Static force (pull vs distance) - characteristics
MW 20x2.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1503 Gs
150.3 mT
 2.41 kg / 5.31 pounds
2410.0 g / 23.6 N
 strong
1 mm 1431 Gs
143.1 mT
 2.18 kg / 4.82 pounds
2184.9 g / 21.4 N
 strong
2 mm 1328 Gs
132.8 mT
 1.88 kg / 4.15 pounds
1882.0 g / 18.5 N
 safe
3 mm 1206 Gs
120.6 mT
 1.55 kg / 3.42 pounds
1552.2 g / 15.2 N
 safe
5 mm 947 Gs
94.7 mT
 0.96 kg / 2.11 pounds
957.1 g / 9.4 N
 safe
10 mm 457 Gs
45.7 mT
 0.22 kg / 0.49 pounds
223.1 g / 2.2 N
 safe
15 mm 224 Gs
22.4 mT
 0.05 kg / 0.12 pounds
53.7 g / 0.5 N
 safe
20 mm 120 Gs
12.0 mT
 0.02 kg / 0.03 pounds
15.4 g / 0.2 N
 safe
30 mm 44 Gs
4.4 mT
 0.00 kg / 0.00 pounds
2.1 g / 0.0 N
 safe
50 mm 11 Gs
1.1 mT
 0.00 kg / 0.00 pounds
0.1 g / 0.0 N
 safe
Pulling power decreases drastically with every subsequent millimeter of spacing. Keep in mind that even the smallest gap (e.g., dirt, paint, dust) strongly diminishes the holding power. Magnetic products hold optimally at the point of direct contact; gap drastically cuts the power. Notice how rapidly the parameters plummet, when the magnet does not touch flatly to the metal substrate. When planning the assembly, discard additional spacers.

Table 2: Shear hold (vertical surface)
MW 20x2.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.48 kg / 1.06 pounds
482.0 g / 4.7 N
1 mm Stal (~0.2) 0.44 kg / 0.96 pounds
436.0 g / 4.3 N
2 mm Stal (~0.2) 0.38 kg / 0.83 pounds
376.0 g / 3.7 N
3 mm Stal (~0.2) 0.31 kg / 0.68 pounds
310.0 g / 3.0 N
5 mm Stal (~0.2) 0.19 kg / 0.42 pounds
192.0 g / 1.9 N
10 mm Stal (~0.2) 0.04 kg / 0.10 pounds
44.0 g / 0.4 N
15 mm Stal (~0.2) 0.01 kg / 0.02 pounds
10.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 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 calculates the theoretical weight limit needed to initiate the shifting of the magnet vertically against a upright steel wall (considering typical friction). This value varies with the gap size between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MW 20x2.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.72 kg / 1.59 pounds
723.0 g / 7.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.48 kg / 1.06 pounds
482.0 g / 4.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.24 kg / 0.53 pounds
241.0 g / 2.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.21 kg / 2.66 pounds
1205.0 g / 11.8 N
When placing a element on a vertical plane (e.g., a car body), it you can count on only about 20%-30% of its nominal power. Gravity and a weak degree of grip influence the fact that holders move down faster than they pop off the substrate. Planning a vertical fastening? Consider that the shear force is significantly lower than the perpendicular breakaway force. On a painted metal, the holder will slip down under a much lighter load. Utilizing a rubberized pad can significantly raise the stability.

Table 4: Steel thickness (substrate influence) - power losses
MW 20x2.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.24 kg / 0.53 pounds
241.0 g / 2.4 N
1 mm
25%
 0.60 kg / 1.33 pounds
602.5 g / 5.9 N
2 mm
50%
 1.21 kg / 2.66 pounds
1205.0 g / 11.8 N
3 mm
75%
 1.81 kg / 3.98 pounds
1807.5 g / 17.7 N
5 mm
100%
 2.41 kg / 5.31 pounds
2410.0 g / 23.6 N
10 mm
100%
 2.41 kg / 5.31 pounds
2410.0 g / 23.6 N
11 mm
100%
 2.41 kg / 5.31 pounds
2410.0 g / 23.6 N
12 mm
100%
 2.41 kg / 5.31 pounds
2410.0 g / 23.6 N
A thin sheet is unable to conduct the full magnetic flux, which wastes potential of the magnet. If you attach a powerful product to a weak sheet, the field will penetrate right through and the pull force will drop sharply. To utilize 100% of this neodymium's potential, you need a suitably thick piece of steel. The material oversaturation means that on delicate walls (e.g., appliance housings), the holder holds weaker. We recommend selecting the steel cross-section based on the following data.

Table 5: Thermal resistance (stability) - thermal limit
MW 20x2.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.41 kg / 5.31 pounds
2410.0 g / 23.6 N
 OK
40 °C -2.2% 2.36 kg / 5.20 pounds
2357.0 g / 23.1 N
 OK
60 °C -4.4% 2.30 kg / 5.08 pounds
2304.0 g / 22.6 N
80 °C -6.6% 2.25 kg / 4.96 pounds
2250.9 g / 22.1 N
100 °C -28.8% 1.72 kg / 3.78 pounds
1715.9 g / 16.8 N
Standard neodymium magnets change their properties power past the thermal threshold. Protect against heat – high temperature can permanently demagnetize this product. With increasing heat, the magnet's force temporarily decreases. Avoid using this magnet close to ovens higher than its safe range. Exceeding the critical threshold will cause irreversible degradation of magnetism.
*Engineering note: Temperature resistance is determined by both grade, as well as the dimension ratios. Low-profile magnets (pancake types) may lose charge permanently under lower heat stress compared to rod magnets. Warning indicator in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - field collision
MW 20x2.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.38 kg / 9.65 pounds
2 771 Gs
0.66 kg / 1.45 pounds
656 g / 6.4 N
 N/A
1 mm 4.20 kg / 9.25 pounds
2 944 Gs
0.63 kg / 1.39 pounds
629 g / 6.2 N
 3.78 kg / 8.33 pounds
~0 Gs
2 mm 3.97 kg / 8.75 pounds
2 862 Gs
0.60 kg / 1.31 pounds
595 g / 5.8 N
 3.57 kg / 7.87 pounds
~0 Gs
3 mm 3.70 kg / 8.17 pounds
2 766 Gs
0.56 kg / 1.22 pounds
556 g / 5.5 N
 3.33 kg / 7.35 pounds
~0 Gs
5 mm 3.12 kg / 6.88 pounds
2 538 Gs
0.47 kg / 1.03 pounds
468 g / 4.6 N
 2.81 kg / 6.19 pounds
~0 Gs
10 mm 1.74 kg / 3.83 pounds
1 895 Gs
0.26 kg / 0.57 pounds
261 g / 2.6 N
 1.56 kg / 3.45 pounds
~0 Gs
20 mm 0.41 kg / 0.89 pounds
915 Gs
0.06 kg / 0.13 pounds
61 g / 0.6 N
 0.36 kg / 0.80 pounds
~0 Gs
50 mm 0.01 kg / 0.02 pounds
140 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
88 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
58 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
41 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
29 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
22 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 neodymium and metal combination. The setup of two magnets produces a massive flux and a further horizon of performance. Want to build a solid fastener? Use a pair of magnets instead of a neodymium and a striker plate. Be careful that when bringing together two magnets, the collision energy is massive. The levitation is a bit weaker than the connection force, but still large.
*The magnetic induction for N-N configuration is approximately ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
* Results show sliding force of a pair of identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - warnings
MW 20x2.5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 7.0 cm
Hearing aid 10 Gs (1.0 mT) 5.5 cm
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Car key 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
A strong magnetic field poses a large risk to electronics as well as pacemakers. These magnets produce a field that disrupts operation of digital equipment. Notice: the invisible magnetic field penetrates the body and housings. Increased vigilance must be exercised by people with hearing aids and drug dispensers. The risk also applies to: automatic timepieces, car keys, membranes, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - warning
MW 20x2.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 21.89 km/h
(6.08 m/s)
 0.11 J
30 mm 22.67 km/h
(6.30 m/s)
 0.12 J
50 mm 22.68 km/h
(6.30 m/s)
 0.12 J
100 mm 22.68 km/h
(6.30 m/s)
 0.12 J
Magnetic elements are very brittle – a violent impact against metal causes immediate chipping. Watch the impact speed – a magnet released freely becomes dangerous. Striking energy can cause material chips or injury to skin. Hold the magnet firmly during bringing near metal so it doesn't hit with great force against the steel surface. A collision at high speed means shattering of the neodymium. Wear safety glasses when working with powerful specimens.

Table 9: Corrosion resistance
MW 20x2.5 / 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 20x2.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 996 Mx 60.0 µWb
Pc Coefficient 0.19 Low (Flat)
Flux value emitted by the pole surface. Key data when building generators as well as sensors. Pc value defines the working geometry.

Table 11: Hydrostatics and buoyancy
MW 20x2.5 / N38

Environment Effective steel pull Effect
Air (land) 2.41 kg Standard
Water (riverbed) 2.76 kg
(+0.35 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Sliding resistance

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

2. Efficiency vs thickness

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

3. Thermal stability

*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) = 0.19

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 specification and ecology
Chemical composition
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Environmental data
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010042-2026
Measurement Calculator
Pulling force
Magnetic Induction
Just fill in a single box, and the tool fill in everything else instantly.

Other deals

MPL 15x10x2 / N38 - lamellar magnet
Product available Ships tomorrow

MPL 15x10x2 / N38 - lamellar magnet

1.316 ZŁ brutto / pcs
MPL 30x15x2 / N38 - lamellar magnet
Product available Ships tomorrow

MPL 30x15x2 / N38 - lamellar magnet

3.89 ZŁ brutto / pcs
UMS 42x12.5x6.5x9 / N38 - conical magnetic holder
Product available Ships tomorrow

UMS 42x12.5x6.5x9 / N38 - conical magnetic holder

27.06 ZŁ brutto / pcs
UMP 107x40 [M8+M10] GW F400 Lina / N38 - search holder
Product available Ships tomorrow

UMP 107x40 [M8+M10] GW F400 Lina / N38 - search holder

450.00 ZŁ brutto / pcs
The offered product is an extremely powerful cylindrical magnet, produced from modern NdFeB material, which, at dimensions of Ø20x2.5 mm, guarantees maximum efficiency. This specific item boasts high dimensional repeatability and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 2.41 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 23.63 N with a weight of only 5.89 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 20.1 mm) using epoxy glues. To ensure stability in industry, 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 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø20x2.5), 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 20 mm and height 2.5 mm. The value of 23.63 N means that the magnet is capable of holding a weight many times exceeding its own mass of 5.89 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 2.5 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 neodymium magnets.

Strengths

Apart from their strong power, neodymium magnets have these key benefits:
  • They do not lose power, even over around 10 years – the drop in strength is only ~1% (based on measurements),
  • They are extremely resistant to demagnetization induced by external disturbances,
  • By covering with a shiny layer of gold, the element has an modern look,
  • Neodymium magnets ensure maximum magnetic induction on a small area, which ensures high operational effectiveness,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
  • Possibility of individual creating and adjusting to concrete needs,
  • Key role in electronics industry – they are utilized in HDD drives, motor assemblies, diagnostic systems, also multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in miniature devices

Disadvantages

Disadvantages of neodymium magnets:
  • At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in realizing nuts and complicated shapes in magnets, we propose using cover - magnetic holder.
  • Health risk related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, tiny parts of these devices can disrupt the diagnostic process medical in case of swallowing.
  • With mass production the cost of neodymium magnets is a challenge,

Holding force characteristics

Magnetic strength at its maximum – what it depends on?

The lifting capacity listed is a measurement result executed under standard conditions:
  • with the contact of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • without the slightest air gap between the magnet and steel
  • for force acting at a right angle (in the magnet axis)
  • in stable room temperature

Determinants of lifting force in real conditions

Effective lifting capacity is affected by working environment parameters, including (from priority):
  • Distance – existence of any layer (rust, tape, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Angle of force application – highest force is available only during pulling at a 90° angle. The force required to slide of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Steel type – mild steel attracts best. Alloy steels decrease magnetic permeability and holding force.
  • Plate texture – ground elements ensure maximum contact, which increases force. Uneven metal weaken the grip.
  • Thermal environment – temperature increase results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity was assessed by applying a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet’s surface and the plate reduces the holding force.

H&S for magnets
Do not underestimate power

Before starting, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.

Sensitization to coating

Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, cease working with magnets and wear gloves.

Beware of splinters

Watch out for shards. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Wear goggles.

Fire warning

Fire warning: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Heat warning

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

Danger to pacemakers

Patients with a pacemaker should maintain an safe separation from magnets. The magnetic field can disrupt the operation of the life-saving device.

Magnetic interference

A strong magnetic field negatively affects the operation of compasses in smartphones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.

Serious injuries

Protect your hands. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying anything in their path. Be careful!

Swallowing risk

Neodymium magnets are not toys. Eating several magnets can lead to them pinching intestinal walls, which poses a critical condition and necessitates urgent medical intervention.

Data carriers

Very strong magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Stay away of min. 10 cm.

Caution! Learn more about hazards in the article: Safety of working with magnets.