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MW 18.9x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010036

GTIN/EAN: 5906301810353

5.00
Load capacity 11.68 kg / 114.54 N Magnetic Induction 450.35 mT / 4503 Gs
Diameter Ø
18.9 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
21.04 g
Magnetization Direction
→ diametrical
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

technical details »

9.00 zł net / 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

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 - MW 18.9x10 / N38 - cylindrical magnet

Specification / characteristics - MW 18.9x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010036
GTIN/EAN 5906301810353
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 18.9 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 21.04 g
Magnetization Direction → diametrical
Load capacity ~ ? 11.68 kg / 114.54 N
Magnetic Induction ~ ? 450.35 mT / 4503 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 18.9x10 / N38 - cylindrical magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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

Engineering analysis of the product - report

Presented data represent the direct effect of a engineering calculation. Results are based on models for the class Nd2Fe14B. Real-world conditions may deviate from the simulation results. Please consider these data as a supplementary guide for designers.

Table 1: Static force (force vs gap) - characteristics
MW 18.9x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4502 Gs
450.2 mT
 11.68 kg / 25.75 lbs
11680.0 g / 114.6 N
 critical level
1 mm 4050 Gs
405.0 mT
 9.46 kg / 20.85 lbs
9455.2 g / 92.8 N
 strong
2 mm 3587 Gs
358.7 mT
 7.42 kg / 16.35 lbs
7416.3 g / 72.8 N
 strong
3 mm 3139 Gs
313.9 mT
 5.68 kg / 12.52 lbs
5678.8 g / 55.7 N
 strong
5 mm 2346 Gs
234.6 mT
 3.17 kg / 6.99 lbs
3172.5 g / 31.1 N
 strong
10 mm 1100 Gs
110.0 mT
 0.70 kg / 1.54 lbs
696.7 g / 6.8 N
 low risk
15 mm 554 Gs
55.4 mT
 0.18 kg / 0.39 lbs
176.7 g / 1.7 N
 low risk
20 mm 308 Gs
30.8 mT
 0.05 kg / 0.12 lbs
54.6 g / 0.5 N
 low risk
30 mm 120 Gs
12.0 mT
 0.01 kg / 0.02 lbs
8.3 g / 0.1 N
 low risk
50 mm 32 Gs
3.2 mT
 0.00 kg / 0.00 lbs
0.6 g / 0.0 N
 low risk
Pulling power decreases sharply per each millimeter of gap. Remember that even a very thin break (e.g., dirt, paint, dust) significantly diminishes the holding power. Magnetic products work most effectively at the point of direct contact; gap nullifies the force. Notice how flashily the load capacity fall, when the magnet does not touch directly to the steel surface. When calculating the arrangement, eliminate redundant distances.

Table 2: Vertical load (wall)
MW 18.9x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.34 kg / 5.15 lbs
2336.0 g / 22.9 N
1 mm Stal (~0.2) 1.89 kg / 4.17 lbs
1892.0 g / 18.6 N
2 mm Stal (~0.2) 1.48 kg / 3.27 lbs
1484.0 g / 14.6 N
3 mm Stal (~0.2) 1.14 kg / 2.50 lbs
1136.0 g / 11.1 N
5 mm Stal (~0.2) 0.63 kg / 1.40 lbs
634.0 g / 6.2 N
10 mm Stal (~0.2) 0.14 kg / 0.31 lbs
140.0 g / 1.4 N
15 mm Stal (~0.2) 0.04 kg / 0.08 lbs
36.0 g / 0.4 N
20 mm Stal (~0.2) 0.01 kg / 0.02 lbs
10.0 g / 0.1 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
This section calculates the approximate weight limit required to initiate the shifting of the magnet vertically along a upright steel wall (assuming standard friction coefficient). This parameter is a function of the gap size between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MW 18.9x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
3.50 kg / 7.72 lbs
3504.0 g / 34.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.34 kg / 5.15 lbs
2336.0 g / 22.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.17 kg / 2.57 lbs
1168.0 g / 11.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
5.84 kg / 12.87 lbs
5840.0 g / 57.3 N
When placing a holder on a upright plane (e.g., a car body), it you can count on just about 1/5 of its maximum pull force. Gravitational force as well as a low friction coefficient influence the fact that products slide down faster than they detach. Designing a wall mount? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the holder will slide down under a much lighter load. Utilizing a rubberized layer can drastically improve the result.

Table 4: Steel thickness (saturation) - power losses
MW 18.9x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 0.58 kg / 1.29 lbs
584.0 g / 5.7 N
1 mm
13%
 1.46 kg / 3.22 lbs
1460.0 g / 14.3 N
2 mm
25%
 2.92 kg / 6.44 lbs
2920.0 g / 28.6 N
3 mm
38%
 4.38 kg / 9.66 lbs
4380.0 g / 43.0 N
5 mm
63%
 7.30 kg / 16.09 lbs
7300.0 g / 71.6 N
10 mm
100%
 11.68 kg / 25.75 lbs
11680.0 g / 114.6 N
11 mm
100%
 11.68 kg / 25.75 lbs
11680.0 g / 114.6 N
12 mm
100%
 11.68 kg / 25.75 lbs
11680.0 g / 114.6 N
A thin metal plate is unable to conduct the entire magnetic field, which weakens actual performance of the magnet. If you attach a powerful product to a too thin substrate, the flux will pass right through and the attraction force will be weaker. To utilize 100% of this magnet's power, you require a sufficiently solid element of steel. The saturation phenomenon means that on thin elements (e.g., appliance housings), the magnet shows lower pull force. We recommend selecting the steel cross-section from these parameters.

Table 5: Thermal resistance (material behavior) - thermal limit
MW 18.9x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 11.68 kg / 25.75 lbs
11680.0 g / 114.6 N
 OK
40 °C -2.2% 11.42 kg / 25.18 lbs
11423.0 g / 112.1 N
 OK
60 °C -4.4% 11.17 kg / 24.62 lbs
11166.1 g / 109.5 N
 OK
80 °C -6.6% 10.91 kg / 24.05 lbs
10909.1 g / 107.0 N
100 °C -28.8% 8.32 kg / 18.33 lbs
8316.2 g / 81.6 N
Classic neodymiums irreversibly lose power above the temperature limit. Protect against heat – heat can permanently destroy this magnet. With increasing heat, the neodymium's capacity briefly lowers. Refrain from using this magnet in hot environments exceeding its operating temperature limit. Ignoring the limit will result in destruction of magnetic properties.
*Engineering note: Heat tolerance is determined by both grade, as well as the dimension ratios. Thin magnets (pancake types) may lose charge permanently under lower heat stress compared to rod magnets. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 18.9x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 35.05 kg / 77.28 lbs
5 600 Gs
5.26 kg / 11.59 lbs
5258 g / 51.6 N
 N/A
1 mm 31.70 kg / 69.88 lbs
8 562 Gs
4.75 kg / 10.48 lbs
4754 g / 46.6 N
 28.53 kg / 62.89 lbs
~0 Gs
2 mm 28.38 kg / 62.56 lbs
8 101 Gs
4.26 kg / 9.38 lbs
4256 g / 41.8 N
 25.54 kg / 56.30 lbs
~0 Gs
3 mm 25.22 kg / 55.59 lbs
7 636 Gs
3.78 kg / 8.34 lbs
3782 g / 37.1 N
 22.69 kg / 50.03 lbs
~0 Gs
5 mm 19.53 kg / 43.05 lbs
6 720 Gs
2.93 kg / 6.46 lbs
2929 g / 28.7 N
 17.57 kg / 38.75 lbs
~0 Gs
10 mm 9.52 kg / 20.99 lbs
4 692 Gs
1.43 kg / 3.15 lbs
1428 g / 14.0 N
 8.57 kg / 18.89 lbs
~0 Gs
20 mm 2.09 kg / 4.61 lbs
2 199 Gs
0.31 kg / 0.69 lbs
314 g / 3.1 N
 1.88 kg / 4.15 lbs
~0 Gs
50 mm 0.06 kg / 0.13 lbs
372 Gs
0.01 kg / 0.02 lbs
9 g / 0.1 N
 0.05 kg / 0.12 lbs
~0 Gs
60 mm 0.03 kg / 0.06 lbs
241 Gs
0.00 kg / 0.01 lbs
4 g / 0.0 N
 0.02 kg / 0.05 lbs
~0 Gs
70 mm 0.01 kg / 0.03 lbs
164 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
 0.01 kg / 0.02 lbs
~0 Gs
80 mm 0.01 kg / 0.01 lbs
116 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.01 lbs
86 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.00 lbs
65 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two strong neodymiums interact from a wider radius than a magnet and sheet combination. The setup of two magnets generates a stronger field and a larger range of performance. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Be careful that when connecting a pair of magnets, the impact force is extreme. The repulsion force is a bit weaker than the connection force, but still large.
*Field value between like poles is approximately ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Note: Figures demonstrate shear force of a pair of matching neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 18.9x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 10.0 cm
Hearing aid 10 Gs (1.0 mT) 8.0 cm
Mechanical watch 20 Gs (2.0 mT) 6.0 cm
Mobile device 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
Extremely neodym field is a large risk to IT equipment as well as pacemakers. These magnets generate a flux that prevents correct functioning of sensitive medical devices. Notice: the unseen radiation penetrates the body and housings. Increased vigilance must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: mechanical watches, car keys, membranes, and screens. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MW 18.9x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.61 km/h
(6.28 m/s)
 0.41 J
30 mm 23.29 km/h
(6.47 m/s)
 0.44 J
50 mm 23.31 km/h
(6.47 m/s)
 0.44 J
100 mm 23.31 km/h
(6.48 m/s)
 0.44 J
Magnetic elements are delicate – a violent impact against metal causes immediate chipping. Control the attraction moment – a neodymium left loose speeds with massive force. Striking energy can destroy the magnet or injury to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear eye protection when playing with large magnets.

Table 9: Anti-corrosion coating durability
MW 18.9x10 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Flux)
MW 18.9x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 12 775 Mx 127.7 µWb
Pc Coefficient 0.61 High (Stable)
Flux value passing through the pole surface. Essential parameter for generator designers and motors. The Pc coefficient determines the working geometry.

Table 11: Physics of underwater searching
MW 18.9x10 / N38

Environment Effective steel pull Effect
Air (land) 11.68 kg Standard
Water (riverbed) 13.37 kg
(+1.69 kg buoyancy gain)
+14.5%
Rust risk: 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. Buoyancy helps in lifting finds.

1. Sliding resistance

*Warning: On a vertical wall, the magnet retains just a fraction of its nominal pull.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically limits the holding force.

3. Heat tolerance

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.61

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

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%

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: 010036-2026
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The presented product is an incredibly powerful cylinder magnet, made from modern NdFeB material, which, at dimensions of Ø18.9x10 mm, guarantees the highest energy density. The MW 18.9x10 / N38 component features high dimensional repeatability and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 11.68 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 114.54 N with a weight of only 21.04 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
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., 18.9.1 mm) using two-component 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.
Magnets NdFeB grade N38 are suitable for the majority 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 (Ø18.9x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 18.9 mm and height 10 mm. The value of 114.54 N means that the magnet is capable of holding a weight many times exceeding its own mass of 21.04 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This rod magnet 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 through the diameter if your project requires it.

Pros as well as cons of Nd2Fe14B magnets.

Benefits

Apart from their notable magnetic energy, neodymium magnets have these key benefits:
  • They retain magnetic properties for nearly 10 years – the drop is just ~1% (based on simulations),
  • They have excellent resistance to magnetism drop as a result of external magnetic sources,
  • By using a reflective coating of silver, the element presents an elegant look,
  • Neodymium magnets create maximum magnetic induction on a small surface, which ensures high operational effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Possibility of accurate machining and modifying to precise needs,
  • Key role in electronics industry – they serve a role in magnetic memories, electric motors, medical devices, as well as complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in compact constructions

Limitations

Cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • We recommend a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Health risk to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum holding power of the magnet – what contributes to it?

Information about lifting capacity was determined for optimal configuration, including:
  • with the use of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • whose transverse dimension is min. 10 mm
  • with an polished contact surface
  • under conditions of ideal adhesion (surface-to-surface)
  • during detachment in a direction vertical to the plane
  • at standard ambient temperature

What influences lifting capacity in practice

Please note that the working load will differ subject to the following factors, starting with the most relevant:
  • Gap (between the magnet and the plate), since even a very small distance (e.g. 0.5 mm) results in a decrease 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 much less (often approx. 20-30% of maximum force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Steel type – mild steel gives the best results. Higher carbon content reduce magnetic properties and holding force.
  • Surface quality – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate lowers the load capacity.

Safe handling of NdFeB magnets
Magnetic media

Intense magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Flammability

Powder generated during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Medical interference

Life threat: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Adults only

Adult use only. Tiny parts can be swallowed, causing severe trauma. Store away from kids and pets.

Physical harm

Pinching hazard: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Use thick gloves.

Magnet fragility

NdFeB magnets are ceramic materials, which means they are fragile like glass. Clashing of two magnets will cause them cracking into shards.

Thermal limits

Control the heat. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and strength.

Phone sensors

Be aware: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your phone, tablet, and GPS.

Conscious usage

Be careful. Neodymium magnets attract from a long distance and snap with huge force, often quicker than you can react.

Skin irritation risks

Studies show that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, refrain from touching magnets with bare hands or choose encased magnets.

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