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MP 5x1.5x3 / N38 - ring magnet

ring magnet

Catalog no 030451

GTIN/EAN: 5906301812357

5.00
Load capacity 0.77 kg / 7.50 N Magnetic Induction 475.16 mT / 4752 Gs
Diameter
5 mm [±0,1 mm]
internal diameter Ø
1.5 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
0.4 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

technical details »

0.280 zł net / pcs

0.344 zł with VAT (23% VAT) / pcs

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price from 1 pcs
0.280 zł
0.344 zł
price from 2200 pcs
0.263 zł
0.324 zł
price from 9000 pcs
0.246 zł
0.303 zł

Frequently asked questions

What is the hole in a ring magnet for?
For mounting on a screw or a shaft. The bore may be cylindrical or countersunk for a screw head. The hole removes magnet volume, so a ring holds less than a disc of the same outside diameter.
What is the polarisation?
Axial as standard — poles on the flat faces of the ring. Diametrical polarisation is made to order.
What sizes are available?
Outside diameter from 5 to 62 mm from stock. To order up to 200 mm outside diameter, 180 mm bore and 40 mm height, with a lead time of 25–35 days.

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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Physical properties - MP 5x1.5x3 / N38 - ring magnet

Specification / characteristics - MP 5x1.5x3 / N38 - ring magnet

properties
properties values
Cat. no. 030451
GTIN/EAN 5906301812357
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 5 mm [±0,1 mm]
internal diameter Ø 1.5 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 0.4 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.77 kg / 7.50 N
Magnetic Induction ~ ? 475.16 mT / 4752 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 5x1.5x3 / N38 - ring 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

Technical modeling of the assembly - report

Presented information are the result of a engineering simulation. Results rely on algorithms for the class Nd2Fe14B. Real-world conditions may differ from theoretical values. Treat these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (force vs distance) - characteristics
MP 5x1.5x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 6157 Gs
615.7 mT
 0.77 kg / 1.70 LBS
770.0 g / 7.6 N
 safe
1 mm 3880 Gs
388.0 mT
 0.31 kg / 0.67 LBS
305.8 g / 3.0 N
 safe
2 mm 2310 Gs
231.0 mT
 0.11 kg / 0.24 LBS
108.4 g / 1.1 N
 safe
3 mm 1422 Gs
142.2 mT
 0.04 kg / 0.09 LBS
41.0 g / 0.4 N
 safe
5 mm 641 Gs
64.1 mT
 0.01 kg / 0.02 LBS
8.3 g / 0.1 N
 safe
10 mm 174 Gs
17.4 mT
 0.00 kg / 0.00 LBS
0.6 g / 0.0 N
 safe
15 mm 76 Gs
7.6 mT
 0.00 kg / 0.00 LBS
0.1 g / 0.0 N
 safe
20 mm 41 Gs
4.1 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
30 mm 16 Gs
1.6 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
50 mm 5 Gs
0.5 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
Magnetic force weakens sharply with every mm of spacing. Note that every additional insulation layer (e.g., dirt, paint, rust) significantly weakens the grip. Magnets hold most effectively during direct contact; air break kills the power. Analyze how rapidly the pull force drop, when the magnet does not adhere tightly to the metal substrate. When calculating the assembly, avoid unnecessary gaps.

Table 2: Vertical hold (wall)
MP 5x1.5x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.15 kg / 0.34 LBS
154.0 g / 1.5 N
1 mm Stal (~0.2) 0.06 kg / 0.14 LBS
62.0 g / 0.6 N
2 mm Stal (~0.2) 0.02 kg / 0.05 LBS
22.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.02 LBS
8.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
The following data calculates the theoretical force required to initiate the sliding of the magnet down on a vertical steel plate (assuming typical friction). This parameter varies with the gap size between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MP 5x1.5x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.23 kg / 0.51 LBS
231.0 g / 2.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.15 kg / 0.34 LBS
154.0 g / 1.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.08 kg / 0.17 LBS
77.0 g / 0.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.39 kg / 0.85 LBS
385.0 g / 3.8 N
When placing a magnet on a vertical plane (e.g., a board), it you can count on barely approx. 1/5 of nominal attraction strength. Gravity as well as a weak degree of grip cause that products slip easier than they detach. Planning a hanger? Note that the sliding force is noticeably lower than the maximum static pull force. On a painted metal, the element will slip down under a much lighter cargo. Using a rubber layer can drastically raise the stability.

Table 4: Material efficiency (saturation) - sheet metal selection
MP 5x1.5x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.08 kg / 0.17 LBS
77.0 g / 0.8 N
1 mm
25%
 0.19 kg / 0.42 LBS
192.5 g / 1.9 N
2 mm
50%
 0.39 kg / 0.85 LBS
385.0 g / 3.8 N
3 mm
75%
 0.58 kg / 1.27 LBS
577.5 g / 5.7 N
5 mm
100%
 0.77 kg / 1.70 LBS
770.0 g / 7.6 N
10 mm
100%
 0.77 kg / 1.70 LBS
770.0 g / 7.6 N
11 mm
100%
 0.77 kg / 1.70 LBS
770.0 g / 7.6 N
12 mm
100%
 0.77 kg / 1.70 LBS
770.0 g / 7.6 N
A thin sheet is unable to take in the full magnetic flux, which squanders power of the magnet. Should you attach a powerful product to a too thin substrate, the magnetism will penetrate right through and the pull force will drop sharply. To squeeze full efficiency of this magnet's power, you need a suitably thick element of steel. The saturation phenomenon causes that on thin elements (e.g., car bodies), the magnet shows lower pull force. We recommend selecting the steel dimension according to the table below.

Table 5: Working in heat (stability) - power drop
MP 5x1.5x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.77 kg / 1.70 LBS
770.0 g / 7.6 N
 OK
40 °C -2.2% 0.75 kg / 1.66 LBS
753.1 g / 7.4 N
 OK
60 °C -4.4% 0.74 kg / 1.62 LBS
736.1 g / 7.2 N
 OK
80 °C -6.6% 0.72 kg / 1.59 LBS
719.2 g / 7.1 N
100 °C -28.8% 0.55 kg / 1.21 LBS
548.2 g / 5.4 N
Ordinary NdFeB products lose power past the thermal threshold. Avoid high temperatures – excessive heat can permanently demagnetize this magnet. With every degree above norm, the neodymium's force briefly decreases. Do not use this magnet close to heaters higher than its safe range. Too high temperature will cause permanent loss of magnetism.
*Technical advisory: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low Pc) may lose charge permanently at lower temperatures compared to rod magnets. The danger warning in the table points to a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MP 5x1.5x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.50 kg / 5.50 LBS
6 171 Gs
0.37 kg / 0.83 LBS
374 g / 3.7 N
 N/A
1 mm 1.62 kg / 3.58 LBS
9 932 Gs
0.24 kg / 0.54 LBS
244 g / 2.4 N
 1.46 kg / 3.22 LBS
~0 Gs
2 mm 0.99 kg / 2.19 LBS
7 760 Gs
0.15 kg / 0.33 LBS
149 g / 1.5 N
 0.89 kg / 1.97 LBS
~0 Gs
3 mm 0.59 kg / 1.30 LBS
5 986 Gs
0.09 kg / 0.20 LBS
88 g / 0.9 N
 0.53 kg / 1.17 LBS
~0 Gs
5 mm 0.21 kg / 0.47 LBS
3 600 Gs
0.03 kg / 0.07 LBS
32 g / 0.3 N
 0.19 kg / 0.42 LBS
~0 Gs
10 mm 0.03 kg / 0.06 LBS
1 281 Gs
0.00 kg / 0.01 LBS
4 g / 0.0 N
 0.02 kg / 0.05 LBS
~0 Gs
20 mm 0.00 kg / 0.00 LBS
349 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
50 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
33 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
23 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
17 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
13 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
10 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two magnets interact from a much further distance than a magnet and sheet setup. The connection of magnet-to-magnet generates a stronger field and a wider radius of action. Planning to create a solid fastener? Apply two magnets instead of a neodymium and a steel. Exercise caution that when attracting two neodymiums, the pinch force is massive. The levitation is slightly lower than the connection force, but still significant.
*Flux density between like poles reaches ~0 Gs at the geometric center of the gap (resulting from vector opposition).
Attention: Estimates demonstrate sliding force of dual identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - precautionary measures
MP 5x1.5x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.0 cm
Hearing aid 10 Gs (1.0 mT) 4.0 cm
Mechanical watch 20 Gs (2.0 mT) 3.0 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Car key 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Extremely neodym field is a serious hazard to electronic devices as well as medical implants. These magnets produce a field that prevents correct functioning of sensitive medical devices. Notice: the unseen radiation passes through tissues and housings. Increased vigilance must be taken by people with cochlear implants and insulin pumps. The risk also applies to: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - collision effects
MP 5x1.5x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.92 km/h
(6.37 m/s)
 0.01 J
30 mm 22.95 km/h
(6.37 m/s)
 0.01 J
50 mm 22.95 km/h
(6.37 m/s)
 0.01 J
100 mm 22.95 km/h
(6.38 m/s)
 0.01 J
NdFeB products are prone to chipping – a collision with steel causes immediate chipping. Control the attraction moment – a magnet released freely speeds with massive force. Striking energy can trigger coating fragments or injury to fingers. Be sure to control the product during installation 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 neodymium. Wear safety glasses when handling with powerful specimens.

Table 9: Surface protection spec
MP 5x1.5x3 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Flux)
MP 5x1.5x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 811 Mx 8.1 µWb
Pc Coefficient 1.66 High (Stable)
Flux value passing through the magnet pole. Essential parameter when building generators as well as sensors. The Pc coefficient defines the working geometry.

Table 11: Submerged application
MP 5x1.5x3 / N38

Environment Effective steel pull Effect
Air (land) 0.77 kg Standard
Water (riverbed) 0.88 kg
(+0.11 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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Note: On a vertical surface, the magnet holds only a fraction of its perpendicular strength.

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) severely reduces 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) = 1.66

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

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%

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: 030451-2026
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The ring magnet with a hole MP 5x1.5x3 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. This product with a force of 0.77 kg works great as a door latch, speaker holder, or mounting element in devices.
This is a crucial issue when working with model MP 5x1.5x3 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because too much pressure 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.
Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. 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. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.
This model is characterized by dimensions Ø5x3 mm and a weight of 0.4 g. The pulling force of this model is an impressive 0.77 kg, which translates to 7.50 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 1.5 mm.
The poles are located on the planes with holes, not on the sides of the ring. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages as well as disadvantages of neodymium magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • They have stable power, and over around ten years their performance decreases symbolically – ~1% (according to theory),
  • Magnets effectively protect themselves against loss of magnetization caused by external fields,
  • The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to look better,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • 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...
  • Thanks to the option of precise shaping and customization to specialized solutions, neodymium magnets can be produced in a broad palette of shapes and sizes, which expands the range of possible applications,
  • Fundamental importance in modern industrial fields – they are utilized in computer drives, electric drive systems, medical equipment, also complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:
  • At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited ability of producing threads in the magnet and complicated shapes - preferred is casing - mounting mechanism.
  • Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Maximum lifting force for a neodymium magnet – what affects it?

Breakaway force was determined for the most favorable conditions, including:
  • on a plate made of structural steel, effectively closing the magnetic field
  • whose transverse dimension reaches at least 10 mm
  • with an polished touching surface
  • with direct contact (no impurities)
  • during detachment in a direction perpendicular to the mounting surface
  • at temperature room level

Impact of factors on magnetic holding capacity in practice

During everyday use, the real power depends on several key aspects, listed from the most important:
  • Distance (betwixt the magnet and the plate), as even a very small distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
  • Load vector – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Metal type – different alloys attracts identically. Alloy additives weaken the attraction effect.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity was determined by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the lifting capacity is smaller. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Safe handling of NdFeB magnets
Pacemakers

Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Bodily injuries

Watch your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Caution required

Use magnets with awareness. Their huge power can shock even professionals. Plan your moves and do not underestimate their force.

GPS and phone interference

An intense magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Keep magnets near a smartphone to prevent damaging the sensors.

Product not for children

Always store magnets away from children. Choking hazard is high, and the consequences of magnets clamping inside the body are very dangerous.

Risk of cracking

NdFeB magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets leads to them breaking into small pieces.

Warning for allergy sufferers

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness happens, cease handling magnets and use protective gear.

Heat sensitivity

Standard neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

Threat to electronics

Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

Dust is flammable

Dust produced during machining of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

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