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MW 25x5 / N38AH - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

cylindrical magnet

Catalog no 010501

GTIN/EAN: 5906301814993

Diameter Ø

25 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

18.41 g

Magnetization Direction

↑ axial

Load capacity

7.29 kg / 71.47 N

Magnetic Induction

219.99 mT / 2200 Gs

Coating

[NiCuNi] Nickel

check properties »

16.68 ZŁ with VAT / pcs + price for transport

13.56 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Need advice?

Contact us by phone +48 22 499 98 98 otherwise send us a note using inquiry form the contact page.
Specifications and shape of a neodymium magnet can be verified on our modular calculator.

Orders placed before 14:00 will be shipped the same business day.

Product card - MW 25x5 / N38AH - cylindrical magnet

Specification / characteristics - MW 25x5 / N38AH - cylindrical magnet

properties

properties	values
Cat. no.	010501
GTIN/EAN	5906301814993
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	25 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	18.41 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.29 kg / 71.47 N
Magnetic Induction ~ ?	219.99 mT / 2200 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38AH

Specification / characteristics MW 25x5 / N38AH - cylindrical magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.5	kGs
remenance Br [min. - max.] ?	1120-1250	mT
coercivity bHc ?	≥ 11.3	kOe
coercivity bHc ?	≥ 899	kA/m
actual internal force iHc	≥ 33	kOe
actual internal force iHc	≥ 2624	kA/m
energy density [min. - max.] ?	36-39	BH max MGOe
energy density [min. - max.] ?	287-310	BH max KJ/m
max. temperature ?	≤ 230	°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	312 - 380	°C
Curie Temperature TF	593 - 716	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Physical modeling of the assembly - technical parameters

These data constitute the result of a engineering calculation. Values rely on models for the class Nd₂Fe₁₄B. Real-world performance might slightly deviate from the simulation results. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - interaction chart
MW 25x5 / N38AH

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2292 Gs 229.2 mT	7.29 kg / 16.07 lbs 7290.0 g / 71.5 N	strong
1 mm	2180 Gs 218.0 mT	6.59 kg / 14.53 lbs 6591.0 g / 64.7 N	strong
2 mm	2042 Gs 204.2 mT	5.78 kg / 12.75 lbs 5782.0 g / 56.7 N	strong
3 mm	1888 Gs 188.8 mT	4.94 kg / 10.90 lbs 4942.8 g / 48.5 N	strong
5 mm	1564 Gs 156.4 mT	3.39 kg / 7.48 lbs 3394.1 g / 33.3 N	strong
10 mm	886 Gs 88.6 mT	1.09 kg / 2.40 lbs 1089.7 g / 10.7 N	weak grip
15 mm	493 Gs 49.3 mT	0.34 kg / 0.74 lbs 336.7 g / 3.3 N	weak grip
20 mm	287 Gs 28.7 mT	0.11 kg / 0.25 lbs 114.0 g / 1.1 N	weak grip
30 mm	115 Gs 11.5 mT	0.02 kg / 0.04 lbs 18.4 g / 0.2 N	weak grip
50 mm	31 Gs 3.1 mT	0.00 kg / 0.00 lbs 1.3 g / 0.0 N	weak grip

Magnetic force decreases significantly per each millimeter of gap. Keep in mind that even a very thin break (e.g., contamination, varnish, rust) strongly diminishes the holding power. Magnetic products operate optimally at the point of direct contact; gap drastically cuts the power. Notice how rapidly the load capacity plummet, when the magnet does not touch tightly to the steel surface. When calculating the mounting, eliminate unnecessary gaps.

Table 2: Slippage capacity (wall)
MW 25x5 / N38AH

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.46 kg / 3.21 lbs 1458.0 g / 14.3 N
1 mm	Stal (~0.2)	1.32 kg / 2.91 lbs 1318.0 g / 12.9 N
2 mm	Stal (~0.2)	1.16 kg / 2.55 lbs 1156.0 g / 11.3 N
3 mm	Stal (~0.2)	0.99 kg / 2.18 lbs 988.0 g / 9.7 N
5 mm	Stal (~0.2)	0.68 kg / 1.49 lbs 678.0 g / 6.7 N
10 mm	Stal (~0.2)	0.22 kg / 0.48 lbs 218.0 g / 2.1 N
15 mm	Stal (~0.2)	0.07 kg / 0.15 lbs 68.0 g / 0.7 N
20 mm	Stal (~0.2)	0.02 kg / 0.05 lbs 22.0 g / 0.2 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The following data indicates the estimated weight limit needed to start the downward movement of the magnet vertically along a vertical steel plate (considering typical friction coefficient). This parameter is relative to the air gap between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 25x5 / N38AH

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.19 kg / 4.82 lbs 2187.0 g / 21.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.46 kg / 3.21 lbs 1458.0 g / 14.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.73 kg / 1.61 lbs 729.0 g / 7.2 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.65 kg / 8.04 lbs 3645.0 g / 35.8 N

When hanging a magnet on a vertical wall (e.g., a fridge), it will maintain barely about 20%-30% of its nominal power. Gravitational force as well as a low friction coefficient mean that holders move down faster than they detach. Planning a vertical fastening? Note that the shear force is significantly lower than the perpendicular breakaway force. On a slippery surface, the element will slip down under a noticeably lighter load. Using a rubber layer can effectively raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MW 25x5 / N38AH

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.73 kg / 1.61 lbs 729.0 g / 7.2 N
1 mm	25%	1.82 kg / 4.02 lbs 1822.5 g / 17.9 N
2 mm	50%	3.65 kg / 8.04 lbs 3645.0 g / 35.8 N
3 mm	75%	5.47 kg / 12.05 lbs 5467.5 g / 53.6 N
5 mm	100%	7.29 kg / 16.07 lbs 7290.0 g / 71.5 N
10 mm	100%	7.29 kg / 16.07 lbs 7290.0 g / 71.5 N
11 mm	100%	7.29 kg / 16.07 lbs 7290.0 g / 71.5 N
12 mm	100%	7.29 kg / 16.07 lbs 7290.0 g / 71.5 N

A too thin steel is unable to take in the entire magnetic field, which wastes potential of the magnet. Should you attach a powerful product to a thin surface, the flux will penetrate right through and the holding will be smaller. To utilize full efficiency of this neodymium's potential, you require a sufficiently solid backing of metal. The saturation effect causes that on delicate walls (e.g., car bodies), the product works worse. We suggest choosing the steel cross-section from these parameters.

Table 5: Working in heat (stability) - thermal limit
MW 25x5 / N38AH

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.29 kg / 16.07 lbs 7290.0 g / 71.5 N	OK
80 °C	-6.6%	6.81 kg / 15.01 lbs 6808.9 g / 66.8 N
150 °C	-14.3%	6.25 kg / 13.77 lbs 6247.5 g / 61.3 N
200 °C	-19.8%	5.85 kg / 12.89 lbs 5846.6 g / 57.4 N
230 °C	-23.1%	5.61 kg / 12.36 lbs 5606.0 g / 55.0 N
250 °C	-45.3%	3.99 kg / 8.79 lbs 3987.6 g / 39.1 N

Ordinary NdFeB products irreversibly lose power above the temperature limit. Watch out for overheating – excessive heat can permanently demagnetize this product. With every degree above norm, the neodymium's power temporarily lowers. Do not use this product close to ovens higher than its working range. Ignoring the limit will lead to destruction of magnetic properties.

*Important note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Flat magnets (low Pc) risk losing magnetic properties under lower heat stress compared to rod magnets. The danger warning in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 25x5 / N38AH

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	15.90 kg / 35.06 lbs 3 855 Gs	2.39 kg / 5.26 lbs 2385 g / 23.4 N	N/A
1 mm	15.19 kg / 33.48 lbs 4 480 Gs	2.28 kg / 5.02 lbs 2278 g / 22.3 N	13.67 kg / 30.13 lbs ~0 Gs
2 mm	14.38 kg / 31.70 lbs 4 359 Gs	2.16 kg / 4.75 lbs 2157 g / 21.2 N	12.94 kg / 28.53 lbs ~0 Gs
3 mm	13.51 kg / 29.79 lbs 4 226 Gs	2.03 kg / 4.47 lbs 2027 g / 19.9 N	12.16 kg / 26.81 lbs ~0 Gs
5 mm	11.70 kg / 25.79 lbs 3 932 Gs	1.75 kg / 3.87 lbs 1755 g / 17.2 N	10.53 kg / 23.21 lbs ~0 Gs
10 mm	7.40 kg / 16.32 lbs 3 128 Gs	1.11 kg / 2.45 lbs 1111 g / 10.9 N	6.66 kg / 14.69 lbs ~0 Gs
20 mm	2.38 kg / 5.24 lbs 1 773 Gs	0.36 kg / 0.79 lbs 357 g / 3.5 N	2.14 kg / 4.72 lbs ~0 Gs
50 mm	0.09 kg / 0.21 lbs 354 Gs	0.01 kg / 0.03 lbs 14 g / 0.1 N	0.09 kg / 0.19 lbs ~0 Gs
60 mm	0.04 kg / 0.09 lbs 231 Gs	0.01 kg / 0.01 lbs 6 g / 0.1 N	0.04 kg / 0.08 lbs ~0 Gs
70 mm	0.02 kg / 0.04 lbs 157 Gs	0.00 kg / 0.01 lbs 3 g / 0.0 N	0.02 kg / 0.04 lbs ~0 Gs
80 mm	0.01 kg / 0.02 lbs 112 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
90 mm	0.01 kg / 0.01 lbs 82 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
100 mm	0.00 kg / 0.01 lbs 62 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnets attract each other from a significantly greater distance than a magnet and sheet setup. The connection of two magnets generates a stronger field and a wider radius of performance. Designing a solid fastener? Apply two magnets instead of one magnet and a steel. Exercise caution that when attracting two neodymiums, the impact force is massive. The repulsion force is marginally weaker than the connection force, but still significant.
*Field value for N-N configuration reaches ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
Attention: Results demonstrate shear force of dual matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (electronics) - precautionary measures
MW 25x5 / N38AH

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	10.0 cm
Hearing aid	10 Gs (1.0 mT)	7.5 cm
Timepiece	20 Gs (2.0 mT)	6.0 cm
Phone / Smartphone	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 medical implants. These magnets produce a flux that prevents correct functioning of digital equipment. Be aware: the invisible magnetic field acts through matter and plastic. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: automatic timepieces, car keys, speakers, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - warning
MW 25x5 / N38AH

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	21.86 km/h (6.07 m/s)	0.34 J
30 mm	34.81 km/h (9.67 m/s)	0.86 J
50 mm	44.88 km/h (12.47 m/s)	1.43 J
100 mm	63.46 km/h (17.63 m/s)	2.86 J

Neodymium magnets are prone to chipping – a strong collision with metal causes immediate chipping. Watch the impact speed – a neodymium left loose turns into a projectile. Striking energy can cause material chips or dangerous crushing to skin. Hold the magnet firmly during mounting so it doesn't hit with great force against the steel surface. A collision at high speed ends with a crack of the magnet. Wear eye protection when working with powerful specimens.

Table 9: Surface protection spec
MW 25x5 / N38AH

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: Construction data (Flux)
MW 25x5 / N38AH

Parameter	Value	SI Unit / Description
Magnetic Flux	13 054 Mx	130.5 µWb
P_c Coefficient	0.29	Low (Flat)

Total magnetic flux emitted by the pole surface. Essential parameter for generator designers as well as sensors. P_c value defines the working geometry.

Table 11: Submerged application
MW 25x5 / N38AH

Environment	Effective steel pull	Effect
Air (land)	7.29 kg	Standard
Water (riverbed)	8.35 kg (+1.06 kg buoyancy gain)	+14.5%

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. However, remember the water resistance when pulling the rope quickly.

1. Shear force

*Note: On a vertical surface, the magnet retains only approx. 20-30% of its perpendicular strength.

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Temperature resistance

*For N38 material, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.29

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 P_c (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 P_c value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical and environmental data

Elemental analysis

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

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: 010501-2026

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23.37 ZŁ brutto / pcs

The offered product is a very strong cylindrical magnet, composed of modern NdFeB material, which, at dimensions of Ø25x5 mm, guarantees maximum efficiency. The MW 25x5 / N38AH component is characterized by an accuracy of ±0.1mm and professional build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 7.29 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

This model is created for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 71.47 N with a weight of only 18.41 g, this rod is indispensable in miniature devices and wherever every gram matters.

Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need even stronger magnets in the same volume (Ø25x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 25 mm and height 5 mm. The value of 71.47 N means that the magnet is capable of holding a weight many times exceeding its own mass of 18.41 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 25 mm. Such an arrangement is standard when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Pros and cons of rare earth magnets.

Pros

Apart from their consistent holding force, neodymium magnets have these key benefits:

Their strength remains stable, and after around ten years it drops only by ~1% (according to research),
Magnets very well protect themselves against demagnetization caused by ambient magnetic noise,
A magnet with a metallic silver surface has an effective appearance,
They are known for high magnetic induction at the operating surface, which affects their effectiveness,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
Thanks to the possibility of free molding and customization to custom projects, NdFeB magnets can be produced in a wide range of forms and dimensions, which makes them more universal,
Significant place in electronics industry – they are used in hard drives, electric drive systems, precision medical tools, and multitasking production systems.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in miniature devices

Limitations

Disadvantages of NdFeB magnets:

To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
Due to limitations in creating threads and complicated shapes in magnets, we propose using casing - magnetic mount.
Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products are able to be problematic in diagnostics medical when they are in the body.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Detachment force of the magnet in optimal conditions – what affects it?

The lifting capacity listed is a result of laboratory testing conducted under the following configuration:

using a sheet made of low-carbon steel, functioning as a circuit closing element
whose transverse dimension is min. 10 mm
characterized by lack of roughness
under conditions of ideal adhesion (surface-to-surface)
under perpendicular application of breakaway force (90-degree angle)
in stable room temperature

Practical aspects of lifting capacity – factors

During everyday use, the actual holding force is determined by several key aspects, presented from most significant:

Air gap (betwixt the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to varnish, rust or debris).
Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
Material composition – not every steel attracts identically. High carbon content worsen the attraction effect.
Surface finish – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity was determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet and the plate reduces the lifting capacity.

Precautions when working with NdFeB magnets

Handling rules

Exercise caution. Neodymium magnets act from a long distance and snap with massive power, often faster than you can move away.

Power loss in heat

Avoid heat. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).

Threat to navigation

Note: rare earth magnets generate a field that interferes with precision electronics. Maintain a separation from your mobile, tablet, and navigation systems.

No play value

These products are not intended for children. Accidental ingestion of multiple magnets may result in them connecting inside the digestive tract, which constitutes a direct threat to life and requires urgent medical intervention.

Combustion hazard

Machining of NdFeB material poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Magnet fragility

Neodymium magnets are sintered ceramics, which means they are fragile like glass. Impact of two magnets leads to them shattering into shards.

Implant safety

Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.

Electronic hazard

Do not bring magnets close to a wallet, computer, or TV. The magnetism can permanently damage these devices and erase data from cards.

Crushing force

Risk of injury: The pulling power is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Metal Allergy

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

Caution! Details about risks in the article: Magnet Safety Guide.

MW 25x5 / N38AH - cylindrical magnet

Product card - MW 25x5 / N38AH - cylindrical magnet

Magnetic properties of material N38AH

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the assembly - technical parameters

Table 1: Static pull force (pull vs gap) - interaction chart MW 25x5 / N38AH

Table 2: Slippage capacity (wall) MW 25x5 / N38AH

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MW 25x5 / N38AH

Table 4: Material efficiency (substrate influence) - power losses MW 25x5 / N38AH

Table 5: Working in heat (stability) - thermal limit MW 25x5 / N38AH

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MW 25x5 / N38AH

Table 7: Protective zones (electronics) - precautionary measures MW 25x5 / N38AH

Table 8: Dynamics (kinetic energy) - warning MW 25x5 / N38AH

Table 9: Surface protection spec MW 25x5 / N38AH

Table 10: Construction data (Flux) MW 25x5 / N38AH

Table 11: Submerged application MW 25x5 / N38AH

1. Shear force

2. Plate thickness effect

3. Temperature resistance

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

Elemental analysis

Ecology and recycling (GPSR)

Force (pull)

Magnetic Induction

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MPL 25x10x5 / N38 - lamellar magnet

UMT 12x20 purple / N38 - board holder

UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

Pros and cons of rare earth magnets.

Pros

Limitations

Lifting parameters

Detachment force of the magnet in optimal conditions – what affects it?

Practical aspects of lifting capacity – factors

Precautions when working with NdFeB magnets

Handling rules

Power loss in heat

Threat to navigation

No play value

Combustion hazard

Magnet fragility

Implant safety

Electronic hazard

Crushing force

Metal Allergy

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - interaction chart
MW 25x5 / N38AH

Table 2: Slippage capacity (wall)
MW 25x5 / N38AH

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 25x5 / N38AH

Table 4: Material efficiency (substrate influence) - power losses
MW 25x5 / N38AH

Table 5: Working in heat (stability) - thermal limit
MW 25x5 / N38AH

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 25x5 / N38AH

Table 7: Protective zones (electronics) - precautionary measures
MW 25x5 / N38AH

Table 8: Dynamics (kinetic energy) - warning
MW 25x5 / N38AH

Table 9: Surface protection spec
MW 25x5 / N38AH

Table 10: Construction data (Flux)
MW 25x5 / N38AH

Table 11: Submerged application
MW 25x5 / N38AH