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MW 29x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010053

GTIN/EAN: 5906301810520

5.00
Load capacity 20.82 kg / 204.22 N Magnetic Induction 351.88 mT / 3519 Gs
Diameter Ø
29 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
49.54 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
check technical data »

14.10 zł net / pcs

17.34 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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Product card - MW 29x10 / N38 - cylindrical magnet

Specification / characteristics - MW 29x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010053
GTIN/EAN 5906301810520
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 29 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 49.54 g
Magnetization Direction ↑ axial
Load capacity ~ ? 20.82 kg / 204.22 N
Magnetic Induction ~ ? 351.88 mT / 3519 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 29x10 / 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 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 analysis of the product - report

Presented values constitute the direct effect of a engineering analysis. Results were calculated on algorithms for the class Nd2Fe14B. Actual parameters might slightly differ from theoretical values. Please consider these calculations as a supplementary guide during assembly planning.

Table 1: Static force (pull vs gap) - characteristics
MW 29x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3518 Gs
351.8 mT
 20.82 kg / 45.90 lbs
20820.0 g / 204.2 N
 dangerous!
1 mm 3321 Gs
332.1 mT
 18.55 kg / 40.89 lbs
18548.8 g / 182.0 N
 dangerous!
2 mm 3106 Gs
310.6 mT
 16.23 kg / 35.77 lbs
16226.1 g / 159.2 N
 dangerous!
3 mm 2883 Gs
288.3 mT
 13.98 kg / 30.82 lbs
13978.2 g / 137.1 N
 dangerous!
5 mm 2437 Gs
243.7 mT
 9.99 kg / 22.02 lbs
9987.1 g / 98.0 N
 medium risk
10 mm 1500 Gs
150.0 mT
 3.78 kg / 8.34 lbs
3783.1 g / 37.1 N
 medium risk
15 mm 905 Gs
90.5 mT
 1.38 kg / 3.04 lbs
1379.2 g / 13.5 N
 weak grip
20 mm 563 Gs
56.3 mT
 0.53 kg / 1.17 lbs
532.4 g / 5.2 N
 weak grip
30 mm 247 Gs
24.7 mT
 0.10 kg / 0.23 lbs
102.4 g / 1.0 N
 weak grip
50 mm 72 Gs
7.2 mT
 0.01 kg / 0.02 lbs
8.7 g / 0.1 N
 weak grip
Grip strength drops sharply with every mm of distance. Keep in mind that even the smallest gap (e.g., contamination, paint, rust) noticeably weakens the grip. Magnetic products hold strongest in perfect adhesion; air break nullifies the power. Observe how rapidly the pull force drop, when the magnet does not adhere directly to the steel surface. When calculating the arrangement, eliminate redundant distances.

Table 2: Sliding hold (wall)
MW 29x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 4.16 kg / 9.18 lbs
4164.0 g / 40.8 N
1 mm Stal (~0.2) 3.71 kg / 8.18 lbs
3710.0 g / 36.4 N
2 mm Stal (~0.2) 3.25 kg / 7.16 lbs
3246.0 g / 31.8 N
3 mm Stal (~0.2) 2.80 kg / 6.16 lbs
2796.0 g / 27.4 N
5 mm Stal (~0.2) 2.00 kg / 4.40 lbs
1998.0 g / 19.6 N
10 mm Stal (~0.2) 0.76 kg / 1.67 lbs
756.0 g / 7.4 N
15 mm Stal (~0.2) 0.28 kg / 0.61 lbs
276.0 g / 2.7 N
20 mm Stal (~0.2) 0.11 kg / 0.23 lbs
106.0 g / 1.0 N
30 mm Stal (~0.2) 0.02 kg / 0.04 lbs
20.0 g / 0.2 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
The table below calculates the approximate shear load sufficient to start the slippage of the magnet vertically on a vertical metal surface (considering typical friction coefficient). The holding force is a function of the distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MW 29x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
6.25 kg / 13.77 lbs
6246.0 g / 61.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
4.16 kg / 9.18 lbs
4164.0 g / 40.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
2.08 kg / 4.59 lbs
2082.0 g / 20.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
10.41 kg / 22.95 lbs
10410.0 g / 102.1 N
When placing a magnet on a vertical wall (e.g., a board), it will only hold just approx. 1/5 of its maximum pull force. Gravity as well as a low friction coefficient cause that holders move down easier than they pull off. Want to create a wall mount? Remember that the sliding force is noticeably lower than the perpendicular breakaway force. On a painted metal, the magnet will slip down under a much lighter load. Application of an anti-slip pad can significantly improve the result.

Table 4: Material efficiency (saturation) - power losses
MW 29x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 1.04 kg / 2.30 lbs
1041.0 g / 10.2 N
1 mm
13%
 2.60 kg / 5.74 lbs
2602.5 g / 25.5 N
2 mm
25%
 5.21 kg / 11.48 lbs
5205.0 g / 51.1 N
3 mm
38%
 7.81 kg / 17.21 lbs
7807.5 g / 76.6 N
5 mm
63%
 13.01 kg / 28.69 lbs
13012.5 g / 127.7 N
10 mm
100%
 20.82 kg / 45.90 lbs
20820.0 g / 204.2 N
11 mm
100%
 20.82 kg / 45.90 lbs
20820.0 g / 204.2 N
12 mm
100%
 20.82 kg / 45.90 lbs
20820.0 g / 204.2 N
A too thin steel cannot conduct the entire magnetic field, which wastes potential of the magnet. Should you attach a powerful product to a weak sheet, the field will penetrate right through and the holding will be smaller. To utilize 100% of this neodymium's potential, you require a sufficiently solid piece of steel. The saturation effect causes that on thin elements (e.g., appliance housings), the product works worse. We advise picking the steel thickness according to the table below.

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 29x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 20.82 kg / 45.90 lbs
20820.0 g / 204.2 N
 OK
40 °C -2.2% 20.36 kg / 44.89 lbs
20362.0 g / 199.8 N
 OK
60 °C -4.4% 19.90 kg / 43.88 lbs
19903.9 g / 195.3 N
80 °C -6.6% 19.45 kg / 42.87 lbs
19445.9 g / 190.8 N
100 °C -28.8% 14.82 kg / 32.68 lbs
14823.8 g / 145.4 N
Standard neodymium magnets irreversibly lose power above the temperature limit. Avoid high temperatures – high temperature can permanently destroy this magnet. With every degree above norm, the magnet's force temporarily drops. Do not use this magnet close to ovens exceeding its operating temperature limit. Exceeding the critical threshold will lead to destruction of magnetism.
*Important note: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (low Pc) are more susceptible to demagnetization under lower heat stress than long magnets. The danger warning in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 29x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 50.40 kg / 111.11 lbs
5 016 Gs
7.56 kg / 16.67 lbs
7560 g / 74.2 N
 N/A
1 mm 47.70 kg / 105.17 lbs
6 845 Gs
7.16 kg / 15.78 lbs
7156 g / 70.2 N
 42.93 kg / 94.65 lbs
~0 Gs
2 mm 44.90 kg / 98.99 lbs
6 641 Gs
6.74 kg / 14.85 lbs
6735 g / 66.1 N
 40.41 kg / 89.09 lbs
~0 Gs
3 mm 42.08 kg / 92.77 lbs
6 429 Gs
6.31 kg / 13.92 lbs
6312 g / 61.9 N
 37.87 kg / 83.50 lbs
~0 Gs
5 mm 36.52 kg / 80.52 lbs
5 990 Gs
5.48 kg / 12.08 lbs
5478 g / 53.7 N
 32.87 kg / 72.47 lbs
~0 Gs
10 mm 24.18 kg / 53.30 lbs
4 873 Gs
3.63 kg / 7.99 lbs
3626 g / 35.6 N
 21.76 kg / 47.97 lbs
~0 Gs
20 mm 9.16 kg / 20.19 lbs
2 999 Gs
1.37 kg / 3.03 lbs
1374 g / 13.5 N
 8.24 kg / 18.17 lbs
~0 Gs
50 mm 0.54 kg / 1.19 lbs
729 Gs
0.08 kg / 0.18 lbs
81 g / 0.8 N
 0.49 kg / 1.07 lbs
~0 Gs
60 mm 0.25 kg / 0.55 lbs
493 Gs
0.04 kg / 0.08 lbs
37 g / 0.4 N
 0.22 kg / 0.49 lbs
~0 Gs
70 mm 0.12 kg / 0.27 lbs
347 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
 0.11 kg / 0.24 lbs
~0 Gs
80 mm 0.06 kg / 0.14 lbs
252 Gs
0.01 kg / 0.02 lbs
10 g / 0.1 N
 0.06 kg / 0.13 lbs
~0 Gs
90 mm 0.04 kg / 0.08 lbs
188 Gs
0.01 kg / 0.01 lbs
5 g / 0.1 N
 0.03 kg / 0.07 lbs
~0 Gs
100 mm 0.02 kg / 0.05 lbs
144 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
 0.02 kg / 0.04 lbs
~0 Gs
Two strong neodymiums interact from a wider radius than a magnet and steel setup. The setup of two magnets produces a massive flux and a further horizon of performance. Planning to create a powerful holder? Utilize two neodymiums instead of one magnet and a striker plate. Be careful that when attracting two neodymiums, the impact force is extreme. The levitation is a bit weaker than the connection force, but still large.
*The magnetic induction for N-N configuration reaches ~0 Gs at the midpoint of the gap (resulting from vector opposition).
Note: Figures apply to friction force of dual matching magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - warnings
MW 29x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 13.5 cm
Hearing aid 10 Gs (1.0 mT) 10.5 cm
Timepiece 20 Gs (2.0 mT) 8.5 cm
Mobile device 40 Gs (4.0 mT) 6.5 cm
Car key 50 Gs (5.0 mT) 6.0 cm
Payment card 400 Gs (40.0 mT) 2.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.0 cm
Extremely neodym field is a large risk to IT equipment and pacemakers. These magnets produce a field that prevents correct functioning of sensitive medical devices. Notice: the unseen radiation acts through matter and glass. Increased vigilance must be taken by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - collision effects
MW 29x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.58 km/h
(6.55 m/s)
 1.06 J
30 mm 25.55 km/h
(7.10 m/s)
 1.25 J
50 mm 25.62 km/h
(7.12 m/s)
 1.25 J
100 mm 25.63 km/h
(7.12 m/s)
 1.26 J
Magnetic elements are very brittle – a violent impact against metal risks their cracking. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Striking energy can destroy the magnet or painful pinches to skin. Always hold the magnet during mounting so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when working with powerful specimens.

Table 9: Corrosion resistance
MW 29x10 / 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 (Pc)
MW 29x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 24 471 Mx 244.7 µWb
Pc Coefficient 0.45 Low (Flat)
Flux value emitted by the pole surface. Key data for generator designers as well as sensors. Pc value defines the working geometry.

Table 11: Hydrostatics and buoyancy
MW 29x10 / N38

Environment Effective steel pull Effect
Air (land) 20.82 kg Standard
Water (riverbed) 23.84 kg
(+3.02 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.

1. Sliding resistance

*Warning: On a vertical surface, the magnet holds just ~20% of its nominal pull.

2. Efficiency vs thickness

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

3. Heat tolerance

*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) = 0.45

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%

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: 010053-2026
Measurement Calculator

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The presented product is an incredibly powerful rod magnet, manufactured from advanced NdFeB material, which, with dimensions of Ø29x10 mm, guarantees the highest energy density. The MW 29x10 / N38 component boasts high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 20.82 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Furthermore, its triple-layer 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 robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 204.22 N with a weight of only 49.54 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure long-term durability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for 90% of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø29x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
This model is characterized by dimensions Ø29x10 mm, which, at a weight of 49.54 g, makes it an element with impressive magnetic energy density. The value of 204.22 N means that the magnet is capable of holding a weight many times exceeding its own mass of 49.54 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 10 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 diametrically if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Strengths

Besides their tremendous magnetic power, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
  • They have excellent resistance to magnetism drop as a result of external magnetic sources,
  • In other words, due to the shiny layer of silver, the element gains visual value,
  • Magnets are distinguished by extremely high magnetic induction on the outer layer,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Considering the possibility of precise shaping and customization to unique projects, NdFeB magnets can be modeled in a wide range of geometric configurations, which makes them more universal,
  • Versatile presence in electronics industry – they are commonly used in HDD drives, electric motors, precision medical tools, also complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in compact constructions

Limitations

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening 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
  • 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 shapes - preferred is casing - mounting mechanism.
  • Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical after entering the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Highest magnetic holding force – what contributes to it?

The force parameter is a measurement result executed under standard conditions:
  • on a block made of mild steel, effectively closing the magnetic flux
  • possessing a massiveness of min. 10 mm to avoid saturation
  • with an ground touching surface
  • under conditions of gap-free contact (surface-to-surface)
  • for force applied at a right angle (pull-off, not shear)
  • at room temperature

Determinants of practical lifting force of a magnet

During everyday use, the real power depends on many variables, listed from the most important:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Material composition – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
  • Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was determined by applying a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate decreases the holding force.

Precautions when working with neodymium magnets
Shattering risk

Neodymium magnets are ceramic materials, meaning they are prone to chipping. Clashing of two magnets leads to them breaking into small pieces.

Safe operation

Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Keep away from computers

Do not bring magnets near a purse, computer, or screen. The magnetism can destroy these devices and wipe information from cards.

Compass and GPS

Navigation devices and smartphones are highly susceptible to magnetism. Close proximity with a strong magnet can decalibrate the internal compass in your phone.

Bone fractures

Mind your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Flammability

Dust created during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Danger to pacemakers

Individuals with a ICD must maintain an safe separation from magnets. The magnetism can stop the functioning of the implant.

Keep away from children

Adult use only. Tiny parts pose a choking risk, leading to intestinal necrosis. Keep away from kids and pets.

Thermal limits

Monitor thermal conditions. Exposing the magnet to high heat will permanently weaken its magnetic structure and pulling force.

Metal Allergy

Studies show that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, refrain from direct skin contact or opt for encased magnets.

Security! More info about hazards in the article: Safety of working with magnets.