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MW 17x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010568

GTIN/EAN: 5906301815600

Load capacity 1.56 kg / 15.30 N Magnetic Induction 141.97 mT / 1420 Gs
Diameter Ø
17 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
3.4 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product parameters »

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Frequently asked questions

Where can I buy strong cylindrical neodymium magnets?
See the available cylinders in the DHIT catalogue. Compare dimensions, grade and the pull-force value on each product card; grade alone does not determine the pull force of a finished magnet.
Can a small cylindrical magnet provide a strong grip for precise workshop work?
Yes, but size alone is not enough to predict the result. Geometry, the steel surface and the direction of load affect the grip. Compare the specifications of the selected dimensions on their product cards.
Which cylindrical magnet can work at a higher temperature?
Check the operating-temperature limit of the particular model rather than assuming one limit for all N grades. The offered N52 models are rated up to 60°C. For hotter applications, ask for a product with a confirmed specification for the actual working temperature.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator
Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical data of the product - MW 17x2 / N38 - cylindrical magnet

Specification / characteristics - MW 17x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010568
GTIN/EAN 5906301815600
Distributor Dhit sp. z o.o.
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 17 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 3.4 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.56 kg / 15.30 N
Magnetic Induction ~ ? 141.97 mT / 1420 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 17x2 / 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 simulation of the product - data

Presented values constitute the result of a mathematical simulation. Values were calculated on algorithms for the class Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static force (force vs distance) - interaction chart
MW 17x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1419 Gs
141.9 mT
 1.56 kg / 3.44 LBS
1560.0 g / 15.3 N
 weak grip
1 mm 1339 Gs
133.9 mT
 1.39 kg / 3.06 LBS
1388.3 g / 13.6 N
 weak grip
2 mm 1220 Gs
122.0 mT
 1.15 kg / 2.54 LBS
1152.2 g / 11.3 N
 weak grip
3 mm 1080 Gs
108.0 mT
 0.90 kg / 1.99 LBS
903.1 g / 8.9 N
 weak grip
5 mm 798 Gs
79.8 mT
 0.49 kg / 1.09 LBS
492.9 g / 4.8 N
 weak grip
10 mm 335 Gs
33.5 mT
 0.09 kg / 0.19 LBS
87.1 g / 0.9 N
 weak grip
15 mm 151 Gs
15.1 mT
 0.02 kg / 0.04 LBS
17.7 g / 0.2 N
 weak grip
20 mm 77 Gs
7.7 mT
 0.00 kg / 0.01 LBS
4.6 g / 0.0 N
 weak grip
30 mm 27 Gs
2.7 mT
 0.00 kg / 0.00 LBS
0.6 g / 0.0 N
 weak grip
50 mm 6 Gs
0.6 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 weak grip
Pulling power drops drastically with every mm of distance. Keep in mind that even a microscopic distance (e.g., contamination, varnish, veneer) significantly diminishes the holding power. Magnets work optimally in perfect adhesion; distance weakens the force. Analyze how rapidly the pull force drop, when the magnet does not touch tightly to the metal substrate. When calculating the mounting, eliminate additional spacers.

Table 2: Sliding load (wall)
MW 17x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Raw steel (µ ≈ 0.2) 0.31 kg / 0.69 LBS
312.0 g / 3.1 N
1 mm Raw steel (µ ≈ 0.2) 0.28 kg / 0.61 LBS
278.0 g / 2.7 N
2 mm Raw steel (µ ≈ 0.2) 0.23 kg / 0.51 LBS
230.0 g / 2.3 N
3 mm Raw steel (µ ≈ 0.2) 0.18 kg / 0.40 LBS
180.0 g / 1.8 N
5 mm Raw steel (µ ≈ 0.2) 0.10 kg / 0.22 LBS
98.0 g / 1.0 N
10 mm Raw steel (µ ≈ 0.2) 0.02 kg / 0.04 LBS
18.0 g / 0.2 N
15 mm Raw steel (µ ≈ 0.2) 0.00 kg / 0.01 LBS
4.0 g / 0.0 N
20 mm Raw steel (µ ≈ 0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
30 mm Raw steel (µ ≈ 0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
50 mm Raw steel (µ ≈ 0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
The table below presents the approximate holding capacity necessary to initiate the shifting of the magnet vertically along a upright metal surface (considering standard friction). The holding force depends on the gap size between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 17x2 / N38

Surface type Friction coefficient / % Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% of nominal force
0.47 kg / 1.03 LBS
468.0 g / 4.6 N
Painted steel (standard)
µ = 0.2 20% of nominal force
0.31 kg / 0.69 LBS
312.0 g / 3.1 N
Oily/slippery steel
µ = 0.1 10% of nominal force
0.16 kg / 0.34 LBS
156.0 g / 1.5 N
Magnet with anti-slip rubber
µ = 0.5 50% of nominal force
0.78 kg / 1.72 LBS
780.0 g / 7.7 N
When hanging a element on a upright wall (e.g., a fridge), it you can count on only about 1/5 of its maximum pull force. Gravity and a weak degree of grip influence the fact that holders move down faster than they pop off the substrate. Designing a wall mount? Note that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the holder will slide down under a noticeably lighter cargo. Using a rubber coating can significantly improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MW 17x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.16 kg / 0.34 LBS
156.0 g / 1.5 N
1 mm
25%
 0.39 kg / 0.86 LBS
390.0 g / 3.8 N
2 mm
50%
 0.78 kg / 1.72 LBS
780.0 g / 7.7 N
3 mm
75%
 1.17 kg / 2.58 LBS
1170.0 g / 11.5 N
5 mm
100%
 1.56 kg / 3.44 LBS
1560.0 g / 15.3 N
10 mm
100%
 1.56 kg / 3.44 LBS
1560.0 g / 15.3 N
11 mm
100%
 1.56 kg / 3.44 LBS
1560.0 g / 15.3 N
12 mm
100%
 1.56 kg / 3.44 LBS
1560.0 g / 15.3 N
A too thin steel is incapable of absorb the full magnetic flux, which squanders power of the magnet. If you install a neodymium to a too thin substrate, the magnetism will pass right through and the pull force will drop sharply. To squeeze full efficiency of this neodymium's potential, you need a suitably thick piece of steel. The saturation effect means that on thin elements (e.g., appliance housings), the holder works worse. We recommend selecting the steel dimension based on the following data.

Table 5: Thermal stability (material behavior) - thermal limit
MW 17x2 / N38

Magnet temperature (°C) Force change relative to 20°C Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.56 kg / 3.44 LBS
1560.0 g / 15.3 N
 Estimate
40 °C -4.4% 1.49 kg / 3.29 LBS
1492.1 g / 14.6 N
 Estimate
60 °C -8.6% 1.43 kg / 3.14 LBS
1425.7 g / 14.0 N
 Estimate
80 °C -12.8% 1.36 kg / 3.00 LBS
1360.9 g / 13.4 N
 Material limit
100 °C — — Out of range — no model
The table estimates the reversible force change relative to 20°C, assuming a Br coefficient of -0.11%/°C and force proportional to Br². This is a simplified model with unchanged contact and geometry, not a measurement. Above the material limit, neither force nor irreversible magnetization loss is predicted.
The temperature limit comes from this product’s material data. Permissible conditions also depend on geometry and the magnetic circuit. Without B-H curves for the specific grade and temperature, Pc alone does not determine irreversible demagnetization. Values within the material range do not guarantee the allowable temperature of the complete assembly.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 17x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.82 kg / 6.22 LBS
2 638 Gs
0.42 kg / 0.93 LBS
423 g / 4.1 N
 N/A
1 mm 2.69 kg / 5.92 LBS
2 771 Gs
0.40 kg / 0.89 LBS
403 g / 4.0 N
 2.42 kg / 5.33 LBS
~0 Gs
2 mm 2.51 kg / 5.53 LBS
2 678 Gs
0.38 kg / 0.83 LBS
376 g / 3.7 N
 2.26 kg / 4.98 LBS
~0 Gs
3 mm 2.30 kg / 5.08 LBS
2 566 Gs
0.35 kg / 0.76 LBS
346 g / 3.4 N
 2.07 kg / 4.57 LBS
~0 Gs
5 mm 1.86 kg / 4.09 LBS
2 303 Gs
0.28 kg / 0.61 LBS
278 g / 2.7 N
 1.67 kg / 3.68 LBS
~0 Gs
10 mm 0.89 kg / 1.96 LBS
1 596 Gs
0.13 kg / 0.29 LBS
134 g / 1.3 N
 0.80 kg / 1.77 LBS
~0 Gs
20 mm 0.16 kg / 0.35 LBS
671 Gs
0.02 kg / 0.05 LBS
24 g / 0.2 N
 0.14 kg / 0.31 LBS
~0 Gs
50 mm 0.00 kg / 0.01 LBS
88 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
54 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
70 mm 0.00 kg / 0.00 LBS
35 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
80 mm 0.00 kg / 0.00 LBS
24 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
90 mm 0.00 kg / 0.00 LBS
18 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
13 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two strong neodymiums attract each other from a wider radius than a neodymium and metal combination. The setup of magnet-to-magnet produces a massive flux and a further horizon of operation. Designing a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Be careful that when attracting two neodymiums, the pinch force is huge. The levitation is marginally weaker than the attraction, but still impressive.
*Field value between like poles drops to ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Attention: Results demonstrate shear force of a pair of matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Axial field levels — not safety zones
MW 17x2 / N38

Field level (Gs) mT Model distance (cm)
< 5 Gs < 0.5 mT 5.5 cm
< 10 Gs < 1.0 mT 4.5 cm
< 20 Gs < 2.0 mT 3.5 cm
< 40 Gs < 4.0 mT 3.0 cm
< 50 Gs < 5.0 mT 2.5 cm
< 400 Gs < 40.0 mT 1.0 cm
< 600 Gs < 60.0 mT 1.0 cm
Reference field levels for a model of one magnet, on its axis in air, with a 5 mm distance step. These are not device immunity limits or safe distances for implants. Do not use this table to assess the safety of a pacemaker, defibrillator or other implant; follow the device manufacturer’s and your clinician’s guidance. Steel and other magnets change the field distribution.

Table 8: Dynamics (kinetic energy) - collision effects
MW 17x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 21.75 km/h
(6.04 m/s)
 0.06 J
30 mm 22.23 km/h
(6.17 m/s)
 0.06 J
50 mm 22.23 km/h
(6.18 m/s)
 0.06 J
100 mm 22.24 km/h
(6.18 m/s)
 0.06 J
Neodymium magnets are prone to chipping – a strong collision with metal causes immediate chipping. Watch the impact speed – a neodymium left loose speeds with massive force. Impact energy can trigger coating fragments or painful pinches to skin. Hold the magnet firmly during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear eye protection when working with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 17x2 / 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)
The following table defines the conditions under which this product can be safely used. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Pc)
MW 17x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 4 135 Mx 41.4 µWb
Pc Coefficient 0.18 Low (Flat)
Total magnetic flux emitted by the pole surface. Key data for generator designers as well as sensors. The Pc coefficient determines the working geometry.

Table 11: Physics of underwater searching
MW 17x2 / N38

Environment Effective steel pull Effect
Air (land) 1.56 kg Standard
Water (riverbed) 1.79 kg
(+0.23 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Wall mount (shear)

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

2. Efficiency vs thickness

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

3. Power loss vs temp

N38: the maximum material working temperature is 80°C. Permitted conditions also depend on the shape and magnetic circuit.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.18

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 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: 010568-2026
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The presented product is an extremely powerful cylinder magnet, composed of modern NdFeB material, which, with dimensions of Ø17x2 mm, guarantees optimal power. This specific item is characterized by high dimensional repeatability and professional build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with significant force (approx. 1.56 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 15.30 N with a weight of only 3.4 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Choose the material grade together with the dimensions and working conditions. A grade designation alone does not determine the pull force of the finished magnet. Check the properties and working temperature of this specific model on its product card; contact us before ordering for an unusual application.
This model is characterized by dimensions Ø17x2 mm, which, at a weight of 3.4 g, makes it an element with impressive magnetic energy density. The value of 15.30 N means that the magnet is capable of holding a weight many times exceeding its own mass of 3.4 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 17 mm. 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 through the diameter if your project requires it.

Strengths and weaknesses of Nd2Fe14B magnets.

Benefits

Besides their immense field intensity, neodymium magnets offer the following advantages:
  • They retain magnetic properties for around ten years – the loss is just ~1% (in theory),
  • Neodymium magnets are extremely resistant to demagnetization caused by external field sources,
  • The use of an refined layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • Magnetic induction on the top side of the magnet is exceptional,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures reaching 230°C and above...
  • Thanks to the potential of precise forming and customization to individualized needs, NdFeB magnets can be manufactured in a variety of shapes and sizes, which amplifies use scope,
  • Huge importance in high-tech industry – they are used in data components, brushless drives, diagnostic systems, also complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in compact constructions

Weaknesses

Drawbacks and weaknesses of neodymium magnets: application proposals
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We suggest cover - magnetic mount, due to difficulties in producing nuts inside the magnet and complicated forms.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these products can complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum lifting capacity of the magnet – what contributes to it?

The force parameter is a measurement result performed under specific, ideal conditions:
  • with the application of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • with a cross-section minimum 10 mm
  • characterized by even structure
  • without the slightest insulating layer between the magnet and steel
  • under vertical application of breakaway force (90-degree angle)
  • at room temperature

Lifting capacity in practice – influencing factors

Please note that the working load will differ depending on the following factors, starting with the most relevant:
  • Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Base massiveness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be lost into the air.
  • Chemical composition of the base – low-carbon steel attracts best. Higher carbon content reduce magnetic properties and lifting capacity.
  • Surface quality – the more even the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Thermal factor – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets
Threat to electronics

Data protection: Strong magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, timepieces).

Physical harm

Large magnets can break fingers instantly. Never put your hand betwixt two strong magnets.

Powerful field

Before starting, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Health Danger

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Power loss in heat

Do not exceed the maximum operating temperature stated in the specifications of the particular product. The limit depends on the material, geometry and operating arrangement; there is no single threshold for all neodymium magnets. Overheating can permanently weaken a magnet.

This is not a toy

Neodymium magnets are not intended for children. Eating a few magnets may result in them pinching intestinal walls, which constitutes a direct threat to life and necessitates immediate surgery.

Allergy Warning

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If redness occurs, immediately stop working with magnets and use protective gear.

Shattering risk

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets will cause them breaking into shards.

Do not drill into magnets

Mechanical processing of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Keep away from electronics

Note: rare earth magnets produce a field that disrupts precision electronics. Keep a separation from your mobile, device, and GPS.

Danger! Details about risks in the article: Safety of working with magnets.