Product available Ships tomorrow

MW 25x12 / N38 - 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 010502

GTIN/EAN: 5906301814986

5.00

Diameter Ø

25 mm [±0,1 mm]

Height

12 mm [±0,1 mm]

Weight

44.18 g

Magnetization Direction

↑ axial

Load capacity

19.60 kg / 192.25 N

Magnetic Induction

429.18 mT / 4292 Gs

Coating

[NiCuNi] Nickel

product specifications »

16.64 ZŁ with VAT / pcs + price for transport

13.53 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

13.53 ZŁ

16.64 ZŁ

price from 50 pcs

12.72 ZŁ

15.64 ZŁ

price from 190 pcs

11.91 ZŁ

14.64 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Do you have a dilemma?

Call us now +48 22 499 98 98 if you prefer drop us a message through request form the contact section.
Weight and appearance of magnets can be verified with our force calculator.

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

Detailed specification - MW 25x12 / N38 - cylindrical magnet

Specification / characteristics - MW 25x12 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010502
GTIN/EAN	5906301814986
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	12 mm [±0,1 mm]
Weight	44.18 g
Magnetization Direction	↑ axial
Load capacity ~ ?	19.60 kg / 192.25 N
Magnetic Induction ~ ?	429.18 mT / 4292 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 25x12 / N38 - cylindrical magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°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

Engineering analysis of the product - data

Presented data constitute the direct effect of a physical simulation. Results rely on algorithms for the class Nd₂Fe₁₄B. Real-world performance may differ. Please consider these data as a supplementary guide when designing systems.

Table 1: Static pull force (pull vs distance) - interaction chart
MW 25x12 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	4291 Gs 429.1 mT	19.60 kg / 43.21 pounds 19600.0 g / 192.3 N	crushing
1 mm	3975 Gs 397.5 mT	16.82 kg / 37.08 pounds 16820.5 g / 165.0 N	crushing
2 mm	3645 Gs 364.5 mT	14.15 kg / 31.19 pounds 14147.5 g / 138.8 N	crushing
3 mm	3316 Gs 331.6 mT	11.71 kg / 25.81 pounds 11707.5 g / 114.9 N	crushing
5 mm	2692 Gs 269.2 mT	7.72 kg / 17.02 pounds 7718.0 g / 75.7 N	warning
10 mm	1518 Gs 151.8 mT	2.45 kg / 5.41 pounds 2451.8 g / 24.1 N	warning
15 mm	863 Gs 86.3 mT	0.79 kg / 1.75 pounds 793.5 g / 7.8 N	safe
20 mm	517 Gs 51.7 mT	0.29 kg / 0.63 pounds 285.1 g / 2.8 N	safe
30 mm	219 Gs 21.9 mT	0.05 kg / 0.11 pounds 51.2 g / 0.5 N	safe
50 mm	63 Gs 6.3 mT	0.00 kg / 0.01 pounds 4.2 g / 0.0 N	safe

Magnetic force drops drastically with every mm of spacing. Keep in mind that even a microscopic distance (e.g., dirt, varnish, veneer) significantly weakens the grip. Neodymiums hold strongest at the point of direct contact; gap drastically cuts the force. Analyze how quickly the load capacity fall, when the product does not touch tightly to the steel surface. When calculating the arrangement, eliminate unnecessary gaps.

Table 2: Shear capacity (wall)
MW 25x12 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	3.92 kg / 8.64 pounds 3920.0 g / 38.5 N
1 mm	Stal (~0.2)	3.36 kg / 7.42 pounds 3364.0 g / 33.0 N
2 mm	Stal (~0.2)	2.83 kg / 6.24 pounds 2830.0 g / 27.8 N
3 mm	Stal (~0.2)	2.34 kg / 5.16 pounds 2342.0 g / 23.0 N
5 mm	Stal (~0.2)	1.54 kg / 3.40 pounds 1544.0 g / 15.1 N
10 mm	Stal (~0.2)	0.49 kg / 1.08 pounds 490.0 g / 4.8 N
15 mm	Stal (~0.2)	0.16 kg / 0.35 pounds 158.0 g / 1.5 N
20 mm	Stal (~0.2)	0.06 kg / 0.13 pounds 58.0 g / 0.6 N
30 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 10.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The following data defines the theoretical weight limit needed to initiate the slippage of the magnet vertically on a vertical steel wall (assuming standard friction). This value is a function of the distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 25x12 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	5.88 kg / 12.96 pounds 5880.0 g / 57.7 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	3.92 kg / 8.64 pounds 3920.0 g / 38.5 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.96 kg / 4.32 pounds 1960.0 g / 19.2 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	9.80 kg / 21.61 pounds 9800.0 g / 96.1 N

When hanging a element on a upright plane (e.g., a fridge), it will maintain only about 20%-30% of its nominal power. Gravitational force as well as a weak degree of grip cause that products slide down easier than they detach. Designing a vertical fastening? Consider that the sliding force is noticeably lower than the perpendicular breakaway force. On a painted metal, the holder will slide down under a significantly smaller weight. Utilizing a rubberized layer can effectively increase the grip.

Table 4: Steel thickness (saturation) - power losses
MW 25x12 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.98 kg / 2.16 pounds 980.0 g / 9.6 N
1 mm	13%	2.45 kg / 5.40 pounds 2450.0 g / 24.0 N
2 mm	25%	4.90 kg / 10.80 pounds 4900.0 g / 48.1 N
3 mm	38%	7.35 kg / 16.20 pounds 7350.0 g / 72.1 N
5 mm	63%	12.25 kg / 27.01 pounds 12250.0 g / 120.2 N
10 mm	100%	19.60 kg / 43.21 pounds 19600.0 g / 192.3 N
11 mm	100%	19.60 kg / 43.21 pounds 19600.0 g / 192.3 N
12 mm	100%	19.60 kg / 43.21 pounds 19600.0 g / 192.3 N

A thin sheet is unable to focus the entire magnetic field, which weakens actual performance of the magnet. Should you attach a powerful product to a too thin substrate, the magnetism will penetrate right through and the attraction force will be weaker. To achieve full efficiency of this magnet's potential, you require a sufficiently solid piece of metal. The saturation effect means that on thin elements (e.g., thin profiles), the holder holds weaker. We recommend selecting the steel cross-section according to the table below.

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 25x12 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	19.60 kg / 43.21 pounds 19600.0 g / 192.3 N	OK
40 °C	-2.2%	19.17 kg / 42.26 pounds 19168.8 g / 188.0 N	OK
60 °C	-4.4%	18.74 kg / 41.31 pounds 18737.6 g / 183.8 N
80 °C	-6.6%	18.31 kg / 40.36 pounds 18306.4 g / 179.6 N
100 °C	-28.8%	13.96 kg / 30.77 pounds 13955.2 g / 136.9 N

Classic neodymiums irreversibly lose strength after exceeding the maximum temperature. Watch out for overheating – high temperature can irreversibly demagnetize this magnet. As the temperature rises, the magnet's capacity temporarily decreases. Avoid using this product in hot environments exceeding its safe range. Ignoring the limit will cause destruction of magnetic properties.

*Important note: Thermal stability depends not only on the material grade, but also on the magnet's shape. Flat magnets (low permeance coefficient) are more susceptible to demagnetization sooner than long magnets. Warning indicator in the table signals a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 25x12 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	55.71 kg / 122.82 pounds 5 494 Gs	8.36 kg / 18.42 pounds 8357 g / 82.0 N	N/A
1 mm	51.78 kg / 114.14 pounds 8 273 Gs	7.77 kg / 17.12 pounds 7766 g / 76.2 N	46.60 kg / 102.73 pounds ~0 Gs
2 mm	47.81 kg / 105.40 pounds 7 949 Gs	7.17 kg / 15.81 pounds 7172 g / 70.4 N	43.03 kg / 94.86 pounds ~0 Gs
3 mm	43.94 kg / 96.88 pounds 7 621 Gs	6.59 kg / 14.53 pounds 6592 g / 64.7 N	39.55 kg / 87.19 pounds ~0 Gs
5 mm	36.65 kg / 80.80 pounds 6 960 Gs	5.50 kg / 12.12 pounds 5497 g / 53.9 N	32.98 kg / 72.72 pounds ~0 Gs
10 mm	21.94 kg / 48.36 pounds 5 385 Gs	3.29 kg / 7.25 pounds 3291 g / 32.3 N	19.74 kg / 43.53 pounds ~0 Gs
20 mm	6.97 kg / 15.36 pounds 3 035 Gs	1.05 kg / 2.30 pounds 1045 g / 10.3 N	6.27 kg / 13.83 pounds ~0 Gs
50 mm	0.33 kg / 0.72 pounds 657 Gs	0.05 kg / 0.11 pounds 49 g / 0.5 N	0.29 kg / 0.65 pounds ~0 Gs
60 mm	0.15 kg / 0.32 pounds 439 Gs	0.02 kg / 0.05 pounds 22 g / 0.2 N	0.13 kg / 0.29 pounds ~0 Gs
70 mm	0.07 kg / 0.16 pounds 306 Gs	0.01 kg / 0.02 pounds 11 g / 0.1 N	0.06 kg / 0.14 pounds ~0 Gs
80 mm	0.04 kg / 0.08 pounds 221 Gs	0.01 kg / 0.01 pounds 6 g / 0.1 N	0.03 kg / 0.07 pounds ~0 Gs
90 mm	0.02 kg / 0.05 pounds 165 Gs	0.00 kg / 0.01 pounds 3 g / 0.0 N	0.02 kg / 0.04 pounds ~0 Gs
100 mm	0.01 kg / 0.03 pounds 126 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.02 pounds ~0 Gs

Two magnetic products interact from a significantly greater distance than a magnet and sheet combination. Such a system of two magnets generates a stronger field and a larger range of operation. Want to build a solid fastener? Use a pair of magnets instead of a neodymium and a striker plate. Be careful that when connecting a pair of magnets, the pinch force is massive. The levitation is a bit weaker than the attraction, but still impressive.
*Field value for N-N configuration is approximately ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
* Calculations demonstrate sliding force of dual matching magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
MW 25x12 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	13.0 cm
Hearing aid	10 Gs (1.0 mT)	10.0 cm
Mechanical watch	20 Gs (2.0 mT)	8.0 cm
Mobile device	40 Gs (4.0 mT)	6.0 cm
Car key	50 Gs (5.0 mT)	5.5 cm
Payment card	400 Gs (40.0 mT)	2.5 cm
HDD hard drive	600 Gs (60.0 mT)	2.0 cm

A strong magnetic field poses a serious hazard to electronic devices as well as medical implants. These magnets generate a field that prevents correct functioning of sensitive medical devices. Remember: the invisible magnetic field passes through tissues and glass. Exceptional care must be taken by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, remotes, membranes, and displays. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - warning
MW 25x12 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.84 km/h (6.35 m/s)	0.89 J
30 mm	36.85 km/h (10.24 m/s)	2.31 J
50 mm	47.51 km/h (13.20 m/s)	3.85 J
100 mm	67.17 km/h (18.66 m/s)	7.69 J

NdFeB products are very brittle – a strong collision with metal risks their cracking. Pay attention to connection velocity – a magnet released freely becomes dangerous. Impact energy can destroy the magnet or painful pinches to skin. Always hold the magnet during bringing near metal so it doesn't hit violently against the metal. A collision at high speed almost guarantees destruction of the neodymium. Use safety goggles when handling with large magnets.

Table 9: Corrosion resistance
MW 25x12 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MW 25x12 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	21 413 Mx	214.1 µWb
P_c Coefficient	0.57	Low (Flat)

Flux value passing through the pole surface. Key data when building generators as well as sensors. P_c value determines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 25x12 / N38

Environment	Effective steel pull	Effect
Air (land)	19.60 kg	Standard
Water (riverbed)	22.44 kg (+2.84 kg buoyancy gain)	+14.5%

Rust risk: 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. Vertical hold

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

2. Plate thickness effect

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

3. Temperature resistance

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.57

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 specification and ecology

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%

Sustainability

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 010502-2026

Measurement Calculator

Pulling force

Force (N)

Force in lbs

Magnetic Induction

Tesla (T)

Put your value in just one slot to get results for the other fields immediately.

Other deals

Product available Ships tomorrow

MW 12x2 / N38 - cylindrical magnet

1.132 ZŁ brutto / pcs

Product available Ships tomorrow

SM 32x475 [2xM8] / N42 - magnetic separator

1414.50 ZŁ brutto / pcs

Product available Ships tomorrow

UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread

9.84 ZŁ brutto / pcs

Product available Ships tomorrow

MW 12x1.5 / N38 - cylindrical magnet

0.431 ZŁ brutto / pcs

The offered product is an exceptionally strong cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø25x12 mm, guarantees maximum efficiency. This specific item features high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 19.60 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is perfect for building generators, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 192.25 N with a weight of only 44.18 g, this rod 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 stability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.

Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø25x12), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 25 mm and height 12 mm. The value of 192.25 N means that the magnet is capable of holding a weight many times exceeding its own mass of 44.18 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 through the diameter if your project requires it.

Pros as well as cons of neodymium magnets.

Benefits

In addition to their pulling strength, neodymium magnets provide the following advantages:

They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
Magnets effectively resist against loss of magnetization caused by foreign field sources,
In other words, due to the aesthetic layer of silver, the element looks attractive,
They show 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 can function (depending on the shape) even at a temperature of 230°C or more...
Thanks to modularity in designing and the ability to customize to individual projects,
Universal use in future technologies – they find application in magnetic memories, drive modules, diagnostic systems, and other advanced devices.
Thanks to their power density, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of neodymium magnets:

To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength 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
Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
We suggest cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complex shapes.
Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical in case of swallowing.
With large orders the cost of neodymium magnets is economically unviable,

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what affects it?

The declared magnet strength concerns the limit force, measured under ideal test conditions, namely:

with the use of a sheet made of special test steel, ensuring full magnetic saturation
with a cross-section minimum 10 mm
with an ground contact surface
under conditions of ideal adhesion (surface-to-surface)
under vertical application of breakaway force (90-degree angle)
at temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

Please note that the working load may be lower depending on the following factors, in order of importance:

Gap (betwixt the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, rust or debris).
Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of nominal force).
Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
Steel type – low-carbon steel attracts best. Alloy steels decrease magnetic permeability and lifting capacity.
Surface structure – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate reduces the holding force.

Precautions when working with neodymium magnets

Maximum temperature

Control the heat. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.

Impact on smartphones

Remember: rare earth magnets generate a field that confuses sensitive sensors. Keep a safe distance from your mobile, tablet, and navigation systems.

Serious injuries

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, destroying anything in their path. Be careful!

Electronic hazard

Do not bring magnets near a wallet, laptop, or TV. The magnetic field can permanently damage these devices and erase data from cards.

Allergy Warning

A percentage of the population have a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Frequent touching might lead to dermatitis. We suggest wear safety gloves.

Danger to pacemakers

For implant holders: Powerful magnets affect electronics. Keep at least 30 cm distance or request help to handle the magnets.

Danger to the youngest

Always keep magnets out of reach of children. Ingestion danger is high, and the effects of magnets clamping inside the body are fatal.

Respect the power

Handle magnets consciously. Their huge power can surprise even experienced users. Plan your moves and respect their force.

Fire risk

Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Protective goggles

NdFeB magnets are ceramic materials, meaning they are prone to chipping. Collision of two magnets will cause them cracking into shards.

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

MW 25x12 / N38 - cylindrical magnet

Detailed specification - MW 25x12 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the product - data

Table 1: Static pull force (pull vs distance) - interaction chart MW 25x12 / N38

Table 2: Shear capacity (wall) MW 25x12 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MW 25x12 / N38

Table 4: Steel thickness (saturation) - power losses MW 25x12 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold MW 25x12 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MW 25x12 / N38

Table 7: Protective zones (implants) - warnings MW 25x12 / N38

Table 8: Collisions (kinetic energy) - warning MW 25x12 / N38

Table 9: Corrosion resistance MW 25x12 / N38

Table 10: Electrical data (Flux) MW 25x12 / N38

Table 11: Underwater work (magnet fishing) MW 25x12 / N38

1. Vertical hold

2. Plate thickness effect

3. Temperature resistance

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

Elemental analysis

Sustainability

Pulling force

Magnetic Induction

Other deals

MW 12x2 / N38 - cylindrical magnet

SM 32x475 [2xM8] / N42 - magnetic separator

UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread

MW 12x1.5 / N38 - cylindrical magnet

Pros as well as cons of neodymium magnets.

Benefits

Weaknesses

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what affects it?

What influences lifting capacity in practice

Precautions when working with neodymium magnets

Maximum temperature

Impact on smartphones

Serious injuries

Electronic hazard

Allergy Warning

Danger to pacemakers

Danger to the youngest

Respect the power

Fire risk

Protective goggles

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - interaction chart
MW 25x12 / N38

Table 2: Shear capacity (wall)
MW 25x12 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 25x12 / N38

Table 4: Steel thickness (saturation) - power losses
MW 25x12 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 25x12 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 25x12 / N38

Table 7: Protective zones (implants) - warnings
MW 25x12 / N38

Table 8: Collisions (kinetic energy) - warning
MW 25x12 / N38

Table 9: Corrosion resistance
MW 25x12 / N38

Table 10: Electrical data (Flux)
MW 25x12 / N38

Table 11: Underwater work (magnet fishing)
MW 25x12 / N38