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MP 5x2.7/1.2x5 Z / N38 - ring magnet

ring magnet

Catalog no 030203

GTIN/EAN: 5906301812203

5.00
Load capacity 0.75 kg / 7.31 N Magnetic Induction 553.14 mT / 5531 Gs
Diameter
5 mm [±0,1 mm]
internal diameter Ø
2.7/1.2 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
0.69 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product details »

0.680 zł net / pcs

0.836 zł with VAT (23% VAT) / pcs

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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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Product card - MP 5x2.7/1.2x5 Z / N38 - ring magnet

Specification / characteristics - MP 5x2.7/1.2x5 Z / N38 - ring magnet

properties
properties values
Cat. no. 030203
GTIN/EAN 5906301812203
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 2.7/1.2 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 0.69 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.75 kg / 7.31 N
Magnetic Induction ~ ? 553.14 mT / 5531 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 5x2.7/1.2x5 Z / 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

Engineering simulation of the assembly - report

Presented data represent the result of a engineering simulation. Results were calculated on algorithms for the class Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these calculations as a supplementary guide for designers.

Table 1: Static pull force (pull vs gap) - interaction chart
MP 5x2.7/1.2x5 Z / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5322 Gs
532.2 mT
 0.75 kg / 1.65 pounds
750.0 g / 7.4 N
 weak grip
1 mm 3295 Gs
329.5 mT
 0.29 kg / 0.63 pounds
287.5 g / 2.8 N
 weak grip
2 mm 1883 Gs
188.3 mT
 0.09 kg / 0.21 pounds
93.9 g / 0.9 N
 weak grip
3 mm 1098 Gs
109.8 mT
 0.03 kg / 0.07 pounds
31.9 g / 0.3 N
 weak grip
5 mm 440 Gs
44.0 mT
 0.01 kg / 0.01 pounds
5.1 g / 0.1 N
 weak grip
10 mm 92 Gs
9.2 mT
 0.00 kg / 0.00 pounds
0.2 g / 0.0 N
 weak grip
15 mm 33 Gs
3.3 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
20 mm 15 Gs
1.5 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
30 mm 5 Gs
0.5 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
50 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
Magnetic force decreases significantly per each millimeter of spacing. Note that even the smallest gap (e.g., dirt, paint, veneer) noticeably diminishes the holding power. Magnets hold strongest at the point of direct contact; distance nullifies the power. Observe how rapidly the load capacity fall, when the product does not adhere flatly to the metal substrate. When planning the arrangement, eliminate unnecessary gaps.

Table 2: Slippage capacity (vertical surface)
MP 5x2.7/1.2x5 Z / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.15 kg / 0.33 pounds
150.0 g / 1.5 N
1 mm Stal (~0.2) 0.06 kg / 0.13 pounds
58.0 g / 0.6 N
2 mm Stal (~0.2) 0.02 kg / 0.04 pounds
18.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
The following data calculates the approximate force needed to initiate the shifting of the magnet downwards against a upright steel plate (assuming standard friction). The holding force is a function of the separation distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - vertical pull
MP 5x2.7/1.2x5 Z / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.22 kg / 0.50 pounds
225.0 g / 2.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.15 kg / 0.33 pounds
150.0 g / 1.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.08 kg / 0.17 pounds
75.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.38 kg / 0.83 pounds
375.0 g / 3.7 N
When mounting a magnet on a upright wall (e.g., a board), it you can count on just approx. 1/5 of nominal attraction strength. Gravity as well as a weak degree of grip influence the fact that products slide down easier than they pull off. Designing a wall mount? Consider that the shear force is noticeably lower than the perpendicular breakaway force. On a painted metal, the magnet will give way down under a much lighter cargo. Utilizing a rubberized pad can significantly increase the grip.

Table 4: Steel thickness (saturation) - power losses
MP 5x2.7/1.2x5 Z / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.08 kg / 0.17 pounds
75.0 g / 0.7 N
1 mm
25%
 0.19 kg / 0.41 pounds
187.5 g / 1.8 N
2 mm
50%
 0.38 kg / 0.83 pounds
375.0 g / 3.7 N
3 mm
75%
 0.56 kg / 1.24 pounds
562.5 g / 5.5 N
5 mm
100%
 0.75 kg / 1.65 pounds
750.0 g / 7.4 N
10 mm
100%
 0.75 kg / 1.65 pounds
750.0 g / 7.4 N
11 mm
100%
 0.75 kg / 1.65 pounds
750.0 g / 7.4 N
12 mm
100%
 0.75 kg / 1.65 pounds
750.0 g / 7.4 N
A thin metal plate cannot conduct the full magnetic flux, 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 full efficiency of this neodymium's power, you require a sufficiently solid element of metal. The saturation phenomenon means that on delicate walls (e.g., car bodies), the magnet works worse. We advise picking the steel cross-section from these parameters.

Table 5: Thermal stability (stability) - power drop
MP 5x2.7/1.2x5 Z / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.75 kg / 1.65 pounds
750.0 g / 7.4 N
 OK
40 °C -2.2% 0.73 kg / 1.62 pounds
733.5 g / 7.2 N
 OK
60 °C -4.4% 0.72 kg / 1.58 pounds
717.0 g / 7.0 N
 OK
80 °C -6.6% 0.70 kg / 1.54 pounds
700.5 g / 6.9 N
100 °C -28.8% 0.53 kg / 1.18 pounds
534.0 g / 5.2 N
Classic neodymiums lose power above the temperature limit. Protect against heat – excessive heat can irreversibly destroy this product. With increasing heat, the magnet's capacity temporarily lowers. Avoid using this product close to ovens higher than its safe range. Exceeding the critical threshold will cause irreversible degradation of magnetism.
*Engineering note: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Flat magnets (low Pc) are more susceptible to demagnetization under lower heat stress than taller cylinders. Warning indicator in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 5x2.7/1.2x5 Z / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.75 kg / 6.06 pounds
5 924 Gs
0.41 kg / 0.91 pounds
412 g / 4.0 N
 N/A
1 mm 1.77 kg / 3.90 pounds
8 541 Gs
0.27 kg / 0.58 pounds
265 g / 2.6 N
 1.59 kg / 3.51 pounds
~0 Gs
2 mm 1.05 kg / 2.32 pounds
6 590 Gs
0.16 kg / 0.35 pounds
158 g / 1.5 N
 0.95 kg / 2.09 pounds
~0 Gs
3 mm 0.60 kg / 1.33 pounds
4 992 Gs
0.09 kg / 0.20 pounds
91 g / 0.9 N
 0.54 kg / 1.20 pounds
~0 Gs
5 mm 0.20 kg / 0.44 pounds
2 860 Gs
0.03 kg / 0.07 pounds
30 g / 0.3 N
 0.18 kg / 0.39 pounds
~0 Gs
10 mm 0.02 kg / 0.04 pounds
880 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
 0.02 kg / 0.04 pounds
~0 Gs
20 mm 0.00 kg / 0.00 pounds
184 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
16 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
10 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
6 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
4 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
3 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
2 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two strong neodymiums interact from a wider radius than a magnet and sheet setup. Such a system of magnet-to-magnet generates a stronger field and a further horizon of operation. Want to build a strong closure? Use a pair of magnets instead of a neodymium and a steel. Exercise caution that when attracting two neodymiums, the pinch force is extreme. The levitation is a bit weaker than the connection force, but still large.
*Flux density in repulsion mode drops to ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
Attention: Calculations show sliding force of two matching magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - warnings
MP 5x2.7/1.2x5 Z / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.0 cm
Hearing aid 10 Gs (1.0 mT) 2.5 cm
Mechanical watch 20 Gs (2.0 mT) 2.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Car key 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
Powerful magnet radiation poses a serious hazard to electronic devices as well as medical implants. These magnets produce a flux that destroys function of digital equipment. Be aware: the unseen radiation penetrates the body and glass. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MP 5x2.7/1.2x5 Z / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 16.76 km/h
(4.65 m/s)
 0.01 J
30 mm 16.76 km/h
(4.66 m/s)
 0.01 J
50 mm 16.76 km/h
(4.66 m/s)
 0.01 J
100 mm 16.76 km/h
(4.66 m/s)
 0.01 J
Neodymium magnets are prone to chipping – a collision with steel can result in shattering. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Impact energy can trigger coating fragments or dangerous crushing to fingers. Hold the magnet firmly during mounting so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear eye protection when playing with powerful specimens.

Table 9: Corrosion resistance
MP 5x2.7/1.2x5 Z / 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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Flux)
MP 5x2.7/1.2x5 Z / N38

Parameter Value SI Unit / Description
Magnetic Flux 862 Mx 8.6 µWb
Pc Coefficient 0.83 High (Stable)
Flux value emitted by the magnet pole. Essential parameter for generator designers as well as sensors. The Pc coefficient determines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MP 5x2.7/1.2x5 Z / N38

Environment Effective steel pull Effect
Air (land) 0.75 kg Standard
Water (riverbed) 0.86 kg
(+0.11 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
The magnetic field penetrates through water without any losses. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

*Warning: On a vertical surface, the magnet holds merely ~20% of its perpendicular strength.

2. Steel saturation

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

3. Thermal stability

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.83

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

Material specification

iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%

Ecology and recycling (GPSR)

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 030203-2026
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It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. This product with a force of 0.75 kg works great as a cabinet closure, speaker holder, or spacer element in devices.
This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. 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. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Always check that the screw head is not larger than the outer diameter of the magnet (5 mm), so it doesn't protrude beyond the outline.
It is a magnetic ring with a diameter of 5 mm and thickness 5 mm. The key parameter here is the holding force amounting to approximately 0.75 kg (force ~7.31 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 2.7/1.2 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). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Strengths and weaknesses of rare earth magnets.

Benefits

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • They show high resistance to demagnetization induced by presence of other magnetic fields,
  • The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to look better,
  • They are known for high magnetic induction at the operating surface, which improves attraction properties,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures approaching 230°C and above...
  • Thanks to the option of precise shaping and adaptation to unique requirements, magnetic components can be created in a wide range of geometric configurations, which amplifies use scope,
  • Huge importance in future technologies – they serve a role in mass storage devices, motor assemblies, diagnostic systems, and industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Limitations

Disadvantages of NdFeB magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • We suggest casing - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated forms.
  • Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Furthermore, small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
  • With mass production the cost of neodymium magnets is a challenge,

Pull force analysis

Best holding force of the magnet in ideal parameters – what affects it?

The declared magnet strength represents the limit force, obtained under ideal test conditions, meaning:
  • with the application of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • with a thickness minimum 10 mm
  • with an ground touching surface
  • with zero gap (without paint)
  • during detachment in a direction perpendicular to the mounting surface
  • in stable room temperature

Determinants of lifting force in real conditions

In practice, the actual lifting capacity results from several key aspects, presented from the most important:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Material composition – not every steel attracts identically. Alloy additives worsen the attraction effect.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

Safety rules for work with neodymium magnets
Fire risk

Fire warning: Rare earth powder is highly flammable. Do not process magnets without safety gear as this risks ignition.

Do not give to children

Neodymium magnets are not suitable for play. Eating several magnets can lead to them pinching intestinal walls, which constitutes a critical condition and requires urgent medical intervention.

Magnetic interference

A strong magnetic field interferes with the operation of compasses in smartphones and GPS navigation. Do not bring magnets near a smartphone to prevent damaging the sensors.

Caution required

Before use, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.

Warning for allergy sufferers

Medical facts indicate that nickel (the usual finish) is a strong allergen. For allergy sufferers, refrain from touching magnets with bare hands and choose encased magnets.

Thermal limits

Control the heat. Heating the magnet to high heat will ruin its magnetic structure and pulling force.

Keep away from computers

Do not bring magnets close to a purse, computer, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Bodily injuries

Big blocks can break fingers instantly. Under no circumstances place your hand between two strong magnets.

Medical implants

Individuals with a pacemaker should maintain an safe separation from magnets. The magnetism can interfere with the functioning of the life-saving device.

Material brittleness

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

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