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

MP 25x8x20 / N38 - ring magnet

ring magnet

Catalog no 030450

GTIN/EAN: 5906301812340

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

8 mm [±0,1 mm]

Height

20 mm [±0,1 mm]

Weight

66.09 g

Magnetization Direction

↑ axial

Load capacity

19.02 kg / 186.54 N

Magnetic Induction

525.50 mT / 5255 Gs

Coating

[NiCuNi] Nickel

product parameters »

41.71 ZŁ with VAT / pcs + price for transport

33.91 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
33.91 ZŁ
41.71 ZŁ
price from 20 pcs
31.88 ZŁ
39.21 ZŁ
price from 80 pcs
29.84 ZŁ
36.70 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Looking for a better price?

Call us now +48 22 499 98 98 otherwise get in touch through form the contact page.
Strength as well as shape of neodymium magnets can be calculated with our force calculator.

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

Product card - MP 25x8x20 / N38 - ring magnet

Specification / characteristics - MP 25x8x20 / N38 - ring magnet

properties
properties values
Cat. no. 030450
GTIN/EAN 5906301812340
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 25 mm [±0,1 mm]
internal diameter Ø 8 mm [±0,1 mm]
Height 20 mm [±0,1 mm]
Weight 66.09 g
Magnetization Direction ↑ axial
Load capacity ~ ? 19.02 kg / 186.54 N
Magnetic Induction ~ ? 525.50 mT / 5255 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x8x20 / N38 - ring 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 modeling of the assembly - report

The following values represent the outcome of a engineering simulation. Values were calculated on algorithms for the class Nd2Fe14B. Real-world performance might slightly differ. Treat these calculations as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - interaction chart
MP 25x8x20 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5777 Gs
577.7 mT
 19.02 kg / 41.93 LBS
19020.0 g / 186.6 N
 dangerous!
1 mm 5310 Gs
531.0 mT
 16.07 kg / 35.42 LBS
16067.7 g / 157.6 N
 dangerous!
2 mm 4846 Gs
484.6 mT
 13.38 kg / 29.50 LBS
13380.1 g / 131.3 N
 dangerous!
3 mm 4397 Gs
439.7 mT
 11.02 kg / 24.29 LBS
11019.3 g / 108.1 N
 dangerous!
5 mm 3576 Gs
357.6 mT
 7.29 kg / 16.07 LBS
7287.1 g / 71.5 N
 strong
10 mm 2073 Gs
207.3 mT
 2.45 kg / 5.40 LBS
2448.1 g / 24.0 N
 strong
15 mm 1231 Gs
123.1 mT
 0.86 kg / 1.90 LBS
863.8 g / 8.5 N
 weak grip
20 mm 773 Gs
77.3 mT
 0.34 kg / 0.75 LBS
340.1 g / 3.3 N
 weak grip
30 mm 356 Gs
35.6 mT
 0.07 kg / 0.16 LBS
72.1 g / 0.7 N
 weak grip
50 mm 115 Gs
11.5 mT
 0.01 kg / 0.02 LBS
7.5 g / 0.1 N
 weak grip
Magnetic force weakens significantly with every subsequent millimeter of distance. Note that even a microscopic distance (e.g., dirt, paint, dust) strongly reduces the pull force. Neodymiums operate strongest during direct contact; gap kills the force. Notice how flashily the load capacity plummet, when the product does not adhere tightly to the steel surface. When designing the arrangement, discard unnecessary gaps.

Table 2: Slippage capacity (wall)
MP 25x8x20 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 3.80 kg / 8.39 LBS
3804.0 g / 37.3 N
1 mm Stal (~0.2) 3.21 kg / 7.09 LBS
3214.0 g / 31.5 N
2 mm Stal (~0.2) 2.68 kg / 5.90 LBS
2676.0 g / 26.3 N
3 mm Stal (~0.2) 2.20 kg / 4.86 LBS
2204.0 g / 21.6 N
5 mm Stal (~0.2) 1.46 kg / 3.21 LBS
1458.0 g / 14.3 N
10 mm Stal (~0.2) 0.49 kg / 1.08 LBS
490.0 g / 4.8 N
15 mm Stal (~0.2) 0.17 kg / 0.38 LBS
172.0 g / 1.7 N
20 mm Stal (~0.2) 0.07 kg / 0.15 LBS
68.0 g / 0.7 N
30 mm Stal (~0.2) 0.01 kg / 0.03 LBS
14.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
This section shows the theoretical force necessary to initiate the shifting of the magnet downwards along a vertical steel wall (assuming typical friction). This parameter varies with the gap size between the magnet and the surface.

Table 3: Wall mounting (sliding) - vertical pull
MP 25x8x20 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
5.71 kg / 12.58 LBS
5706.0 g / 56.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
3.80 kg / 8.39 LBS
3804.0 g / 37.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.90 kg / 4.19 LBS
1902.0 g / 18.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
9.51 kg / 20.97 LBS
9510.0 g / 93.3 N
When mounting a magnet on a upright wall (e.g., a board), it will only hold only approx. 20%-30% of its nominal power. Gravitational force as well as a low friction coefficient influence the fact that holders slip easier than they pull off. Planning a hanger? Note that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the magnet will give way down under a significantly smaller load. Application of an anti-slip pad can drastically raise the stability.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 25x8x20 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 0.95 kg / 2.10 LBS
951.0 g / 9.3 N
1 mm
13%
 2.38 kg / 5.24 LBS
2377.5 g / 23.3 N
2 mm
25%
 4.76 kg / 10.48 LBS
4755.0 g / 46.6 N
3 mm
38%
 7.13 kg / 15.72 LBS
7132.5 g / 70.0 N
5 mm
63%
 11.89 kg / 26.21 LBS
11887.5 g / 116.6 N
10 mm
100%
 19.02 kg / 41.93 LBS
19020.0 g / 186.6 N
11 mm
100%
 19.02 kg / 41.93 LBS
19020.0 g / 186.6 N
12 mm
100%
 19.02 kg / 41.93 LBS
19020.0 g / 186.6 N
A too thin steel is incapable of conduct the full magnetic flux, which weakens actual performance of the holder. If you install a neodymium to a weak sheet, the magnetism will penetrate right through and the pull force will drop sharply. To utilize the maximum of this magnet's potential, you need a suitably thick backing of metal. The saturation effect causes that on delicate walls (e.g., thin profiles), the product shows lower pull force. We suggest choosing the steel thickness according to the table below.

Table 5: Thermal resistance (material behavior) - thermal limit
MP 25x8x20 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 19.02 kg / 41.93 LBS
19020.0 g / 186.6 N
 OK
40 °C -2.2% 18.60 kg / 41.01 LBS
18601.6 g / 182.5 N
 OK
60 °C -4.4% 18.18 kg / 40.09 LBS
18183.1 g / 178.4 N
 OK
80 °C -6.6% 17.76 kg / 39.16 LBS
17764.7 g / 174.3 N
100 °C -28.8% 13.54 kg / 29.86 LBS
13542.2 g / 132.8 N
Standard neodymium magnets change their properties power after exceeding the maximum temperature. Protect against heat – heat can irreversibly demagnetize this product. With every degree above norm, the neodymium's power briefly lowers. Avoid using this magnet close to ovens exceeding its working range. Ignoring the limit will result in permanent loss of magnetic properties.
*Important note: Thermal stability is determined by both grade, but also on the magnet's shape. Thin magnets (low Pc) risk losing magnetic properties sooner than taller cylinders. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 25x8x20 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 30.91 kg / 68.14 LBS
6 082 Gs
4.64 kg / 10.22 LBS
4636 g / 45.5 N
 N/A
1 mm 28.48 kg / 62.79 LBS
11 091 Gs
4.27 kg / 9.42 LBS
4272 g / 41.9 N
 25.63 kg / 56.51 LBS
~0 Gs
2 mm 26.11 kg / 57.57 LBS
10 620 Gs
3.92 kg / 8.63 LBS
3917 g / 38.4 N
 23.50 kg / 51.81 LBS
~0 Gs
3 mm 23.86 kg / 52.61 LBS
10 153 Gs
3.58 kg / 7.89 LBS
3580 g / 35.1 N
 21.48 kg / 47.35 LBS
~0 Gs
5 mm 19.76 kg / 43.56 LBS
9 238 Gs
2.96 kg / 6.53 LBS
2964 g / 29.1 N
 17.78 kg / 39.20 LBS
~0 Gs
10 mm 11.84 kg / 26.11 LBS
7 152 Gs
1.78 kg / 3.92 LBS
1776 g / 17.4 N
 10.66 kg / 23.50 LBS
~0 Gs
20 mm 3.98 kg / 8.77 LBS
4 145 Gs
0.60 kg / 1.32 LBS
597 g / 5.9 N
 3.58 kg / 7.89 LBS
~0 Gs
50 mm 0.24 kg / 0.54 LBS
1 024 Gs
0.04 kg / 0.08 LBS
36 g / 0.4 N
 0.22 kg / 0.48 LBS
~0 Gs
60 mm 0.12 kg / 0.26 LBS
712 Gs
0.02 kg / 0.04 LBS
18 g / 0.2 N
 0.11 kg / 0.23 LBS
~0 Gs
70 mm 0.06 kg / 0.13 LBS
514 Gs
0.01 kg / 0.02 LBS
9 g / 0.1 N
 0.06 kg / 0.12 LBS
~0 Gs
80 mm 0.03 kg / 0.07 LBS
383 Gs
0.01 kg / 0.01 LBS
5 g / 0.1 N
 0.03 kg / 0.07 LBS
~0 Gs
90 mm 0.02 kg / 0.04 LBS
293 Gs
0.00 kg / 0.01 LBS
3 g / 0.0 N
 0.02 kg / 0.04 LBS
~0 Gs
100 mm 0.01 kg / 0.03 LBS
230 Gs
0.00 kg / 0.00 LBS
2 g / 0.0 N
 0.01 kg / 0.02 LBS
~0 Gs
Two magnetic products interact from a significantly greater distance than a magnet and sheet setup. Such a system of two magnets generates a stronger field and a larger range of action. Planning to create a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when connecting a pair of magnets, the collision energy is huge. The repulsion force is a bit weaker than the attraction, but still significant.
*Field value in repulsion mode reaches ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
Attention: Estimates apply to sliding force of two matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (electronics) - warnings
MP 25x8x20 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 17.0 cm
Hearing aid 10 Gs (1.0 mT) 13.5 cm
Mechanical watch 20 Gs (2.0 mT) 10.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 8.0 cm
Remote 50 Gs (5.0 mT) 7.5 cm
Payment card 400 Gs (40.0 mT) 3.0 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm
A strong magnetic field poses a real danger to electronic devices as well as pacemakers. These neodymiums generate a field that disrupts operation of digital equipment. Remember: the unseen radiation penetrates the body and plastic. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, remotes, membranes, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MP 25x8x20 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 18.43 km/h
(5.12 m/s)
 0.87 J
30 mm 29.70 km/h
(8.25 m/s)
 2.25 J
50 mm 38.27 km/h
(10.63 m/s)
 3.73 J
100 mm 54.10 km/h
(15.03 m/s)
 7.46 J
Neodymium magnets are prone to chipping – a violent impact against metal risks their cracking. Pay attention to connection velocity – a magnet released freely turns into a projectile. Impact energy can destroy the magnet or dangerous crushing to fingers. Be sure to control the product during installation so it doesn't hit with great force against the steel surface. A collision at high speed means shattering of the neodymium. Use safety goggles when working with large magnets.

Table 9: Coating parameters (durability)
MP 25x8x20 / 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 (Flux)
MP 25x8x20 / N38

Parameter Value SI Unit / Description
Magnetic Flux 10 108 Mx 101.1 µWb
Pc Coefficient 1.25 High (Stable)
Flux value passing through the pole surface. Essential parameter in coil applications and motors. Pc value determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 25x8x20 / N38

Environment Effective steel pull Effect
Air (land) 19.02 kg Standard
Water (riverbed) 21.78 kg
(+2.76 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!
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. Sliding resistance

*Note: On a vertical wall, the magnet holds only approx. 20-30% of its max power.

2. Steel saturation

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

3. Temperature resistance

*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) = 1.25

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
Material specification
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Ecology and recycling (GPSR)
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 030450-2026
Quick Unit Converter
Pulling force
Field Strength
Insert data in one of the inputs, and all other values change in real-time.

Check out more deals

SM 32x425 [2xM8] / N52 - magnetic separator
Product available Ships today (order by 14:00)

SM 32x425 [2xM8] / N52 - magnetic separator

1463.70 ZŁ brutto / pcs
MPL 35x35x10 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 35x35x10 / N38 - lamellar magnet

35.10 ZŁ brutto / pcs
SM 19x225 [2xM6] / N50 - magnetic separator
Product available Ships today (order by 14:00)

SM 19x225 [2xM6] / N50 - magnetic separator

528.90 ZŁ brutto / pcs
NC kulka fi 2 cale / N52 - neocube
Product available Ships today (order by 14:00)

NC kulka fi 2 cale / N52 - neocube

1200.00 ZŁ brutto / pcs
The ring magnet with a hole MP 25x8x20 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. This product with a force of 19.02 kg works great as a door latch, speaker holder, or mounting element in devices.
This is a crucial issue when working with model MP 25x8x20 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. When tightening the screw, you must maintain great sensitivity. We recommend tightening manually with a screwdriver, not an impact driver, because excessive force will cause the ring to crack. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.
These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but does not ensure full waterproofing. Damage to the protective layer during assembly is the most common cause of rusting. If you must use it outside, paint it with anti-corrosion paint after mounting.
The inner hole diameter determines the maximum size of the mounting element. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Aesthetic mounting requires selecting the appropriate head size.
This model is characterized by dimensions Ø25x20 mm and a weight of 66.09 g. The pulling force of this model is an impressive 19.02 kg, which translates to 186.54 N in newtons. The mounting hole diameter is precisely 8 mm.
The poles are located on the planes with holes, not on the sides of the ring. In the case of connecting two rings, make sure one is turned the right way. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Advantages and disadvantages of neodymium magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:
  • They do not lose strength, even during nearly 10 years – the decrease in power is only ~1% (according to tests),
  • Magnets effectively resist against demagnetization caused by external fields,
  • Thanks to the elegant finish, the layer of nickel, gold, or silver gives an clean appearance,
  • Magnetic induction on the top side of the magnet is very high,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Possibility of custom shaping and adapting to complex applications,
  • Universal use in innovative solutions – they are used in magnetic memories, drive modules, advanced medical instruments, also modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which allows their use in small systems

Limitations

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
  • Limited ability of producing nuts in the magnet and complicated shapes - recommended is cover - magnetic holder.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these magnets can complicate diagnosis medical when they are in the body.
  • Due to expensive raw materials, their price is relatively high,

Holding force characteristics

Magnetic strength at its maximum – what contributes to it?

Information about lifting capacity is the result of a measurement for optimal configuration, assuming:
  • using a base made of mild steel, serving as a magnetic yoke
  • whose thickness equals approx. 10 mm
  • with a plane cleaned and smooth
  • with zero gap (no impurities)
  • under perpendicular force direction (90-degree angle)
  • in stable room temperature

Lifting capacity in real conditions – factors

Real force is influenced by working environment parameters, mainly (from most important):
  • Gap (betwixt the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Metal type – not every steel reacts the same. Alloy additives weaken the attraction effect.
  • Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.

Safe handling of neodymium magnets
Keep away from children

Strictly store magnets away from children. Risk of swallowing is high, and the effects of magnets connecting inside the body are life-threatening.

Mechanical processing

Fire hazard: Rare earth powder is explosive. Do not process magnets without safety gear as this may cause fire.

Magnetic interference

Navigation devices and smartphones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Avoid contact if allergic

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation appears, immediately stop handling magnets and use protective gear.

Thermal limits

Control the heat. Exposing the magnet to high heat will permanently weaken its properties and strength.

Do not underestimate power

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

Crushing risk

Danger of trauma: The pulling power is so great that it can result in blood blisters, crushing, and broken bones. Use thick gloves.

ICD Warning

Warning for patients: Powerful magnets affect medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

Shattering risk

Neodymium magnets are ceramic materials, which means they are very brittle. Collision of two magnets will cause them shattering into small pieces.

Electronic devices

Do not bring magnets near a purse, laptop, or screen. The magnetism can destroy these devices and erase data from cards.

Danger! Learn more about hazards in the article: Magnet Safety Guide.