Product available Ships tomorrow

MW 25x2.5 / 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 010449

GTIN/EAN: 5906301811121

5.00

Diameter Ø

25 mm [±0,1 mm]

Height

2.5 mm [±0,1 mm]

Weight

9.2 g

Magnetization Direction

↑ axial

Load capacity

2.55 kg / 25.03 N

Magnetic Induction

121.57 mT / 1216 Gs

Coating

[NiCuNi] Nickel

see technical specifications »

3.95 ZŁ with VAT / pcs + price for transport

3.21 ZŁ net + 23% VAT / pcs

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Technical specification of the product - MW 25x2.5 / N38 - cylindrical magnet

Specification / characteristics - MW 25x2.5 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010449
GTIN/EAN	5906301811121
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	2.5 mm [±0,1 mm]
Weight	9.2 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.55 kg / 25.03 N
Magnetic Induction ~ ?	121.57 mT / 1216 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 25x2.5 / 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

Physical modeling of the product - data

Presented information constitute the outcome of a physical calculation. Results were calculated on algorithms for the class Nd₂Fe₁₄B. Actual performance might slightly differ from theoretical values. Use these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs distance) - characteristics
MW 25x2.5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1216 Gs 121.6 mT	2.55 kg / 5.62 lbs 2550.0 g / 25.0 N	warning
1 mm	1177 Gs 117.7 mT	2.39 kg / 5.27 lbs 2391.6 g / 23.5 N	warning
2 mm	1121 Gs 112.1 mT	2.17 kg / 4.78 lbs 2166.6 g / 21.3 N	warning
3 mm	1050 Gs 105.0 mT	1.90 kg / 4.19 lbs 1902.7 g / 18.7 N	safe
5 mm	887 Gs 88.7 mT	1.36 kg / 2.99 lbs 1358.4 g / 13.3 N	safe
10 mm	511 Gs 51.1 mT	0.45 kg / 0.99 lbs 450.5 g / 4.4 N	safe
15 mm	282 Gs 28.2 mT	0.14 kg / 0.30 lbs 137.4 g / 1.3 N	safe
20 mm	162 Gs 16.2 mT	0.05 kg / 0.10 lbs 45.4 g / 0.4 N	safe
30 mm	64 Gs 6.4 mT	0.01 kg / 0.02 lbs 7.0 g / 0.1 N	safe
50 mm	17 Gs 1.7 mT	0.00 kg / 0.00 lbs 0.5 g / 0.0 N	safe

Grip strength weakens significantly with every subsequent millimeter of distance. Keep in mind that even the smallest gap (e.g., contamination, paint, dust) strongly reduces the pull force. Neodymiums work strongest during direct contact; gap nullifies the power. Notice how quickly the pull force drop, when the magnet does not touch flatly to the steel surface. When calculating the mounting, discard redundant distances.

Table 2: Sliding hold (vertical surface)
MW 25x2.5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.51 kg / 1.12 lbs 510.0 g / 5.0 N
1 mm	Stal (~0.2)	0.48 kg / 1.05 lbs 478.0 g / 4.7 N
2 mm	Stal (~0.2)	0.43 kg / 0.96 lbs 434.0 g / 4.3 N
3 mm	Stal (~0.2)	0.38 kg / 0.84 lbs 380.0 g / 3.7 N
5 mm	Stal (~0.2)	0.27 kg / 0.60 lbs 272.0 g / 2.7 N
10 mm	Stal (~0.2)	0.09 kg / 0.20 lbs 90.0 g / 0.9 N
15 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 28.0 g / 0.3 N
20 mm	Stal (~0.2)	0.01 kg / 0.02 lbs 10.0 g / 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 2.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The table below presents the theoretical force needed to initiate the slippage of the magnet down against a vertical metal surface (considering typical friction). This parameter is relative to the air gap between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
MW 25x2.5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.76 kg / 1.69 lbs 765.0 g / 7.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.51 kg / 1.12 lbs 510.0 g / 5.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.26 kg / 0.56 lbs 255.0 g / 2.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.28 kg / 2.81 lbs 1275.0 g / 12.5 N

When hanging a element on a vertical wall (e.g., a car body), it will only hold only about 20%-30% of its nominal power. Gravity and a low friction coefficient influence the fact that products move down faster than they pop off the substrate. Want to create a vertical fastening? Remember that the sliding force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the magnet will slip down under a noticeably lighter load. Utilizing a rubberized coating can effectively raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MW 25x2.5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.26 kg / 0.56 lbs 255.0 g / 2.5 N
1 mm	25%	0.64 kg / 1.41 lbs 637.5 g / 6.3 N
2 mm	50%	1.28 kg / 2.81 lbs 1275.0 g / 12.5 N
3 mm	75%	1.91 kg / 4.22 lbs 1912.5 g / 18.8 N
5 mm	100%	2.55 kg / 5.62 lbs 2550.0 g / 25.0 N
10 mm	100%	2.55 kg / 5.62 lbs 2550.0 g / 25.0 N
11 mm	100%	2.55 kg / 5.62 lbs 2550.0 g / 25.0 N
12 mm	100%	2.55 kg / 5.62 lbs 2550.0 g / 25.0 N

A thin metal plate cannot absorb the full magnetic flux, which squanders power of the magnet. Should you install a neodymium to a thin surface, the flux will pass right through and the attraction force will be weaker. To squeeze 100% of this neodymium's potential, you require a sufficiently solid element of steel. The saturation phenomenon means that on delicate walls (e.g., appliance housings), the magnet holds weaker. We suggest choosing the steel thickness based on the following data.

Table 5: Thermal resistance (material behavior) - thermal limit
MW 25x2.5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	2.55 kg / 5.62 lbs 2550.0 g / 25.0 N	OK
40 °C	-2.2%	2.49 kg / 5.50 lbs 2493.9 g / 24.5 N	OK
60 °C	-4.4%	2.44 kg / 5.37 lbs 2437.8 g / 23.9 N
80 °C	-6.6%	2.38 kg / 5.25 lbs 2381.7 g / 23.4 N
100 °C	-28.8%	1.82 kg / 4.00 lbs 1815.6 g / 17.8 N

Classic neodymiums change their properties power after exceeding the maximum temperature. Avoid high temperatures – excessive heat can permanently demagnetize this magnet. With increasing heat, the magnet's force briefly lowers. Refrain from using this product near heat sources exceeding its operating temperature limit. Ignoring the limit will result in destruction of magnetism.

*Engineering note: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low permeance coefficient) may lose charge permanently sooner compared to rod magnets. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 25x2.5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	4.47 kg / 9.86 lbs 2 302 Gs	0.67 kg / 1.48 lbs 671 g / 6.6 N	N/A
1 mm	4.35 kg / 9.59 lbs 2 398 Gs	0.65 kg / 1.44 lbs 653 g / 6.4 N	3.92 kg / 8.63 lbs ~0 Gs
2 mm	4.19 kg / 9.25 lbs 2 355 Gs	0.63 kg / 1.39 lbs 629 g / 6.2 N	3.77 kg / 8.32 lbs ~0 Gs
3 mm	4.01 kg / 8.84 lbs 2 302 Gs	0.60 kg / 1.33 lbs 601 g / 5.9 N	3.61 kg / 7.95 lbs ~0 Gs
5 mm	3.57 kg / 7.88 lbs 2 173 Gs	0.54 kg / 1.18 lbs 536 g / 5.3 N	3.22 kg / 7.09 lbs ~0 Gs
10 mm	2.38 kg / 5.25 lbs 1 775 Gs	0.36 kg / 0.79 lbs 357 g / 3.5 N	2.14 kg / 4.73 lbs ~0 Gs
20 mm	0.79 kg / 1.74 lbs 1 022 Gs	0.12 kg / 0.26 lbs 119 g / 1.2 N	0.71 kg / 1.57 lbs ~0 Gs
50 mm	0.03 kg / 0.07 lbs 198 Gs	0.00 kg / 0.01 lbs 4 g / 0.0 N	0.03 kg / 0.06 lbs ~0 Gs
60 mm	0.01 kg / 0.03 lbs 127 Gs	0.00 kg / 0.00 lbs 2 g / 0.0 N	0.01 kg / 0.02 lbs ~0 Gs
70 mm	0.01 kg / 0.01 lbs 86 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
80 mm	0.00 kg / 0.01 lbs 61 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 44 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 33 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnetic products attract each other from a much further distance than a magnet and steel combination. Such a system of magnet-to-magnet produces a massive flux and a further horizon of operation. Want to build a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Remember that when bringing together two magnets, the collision energy is huge. The levitation is slightly lower than the attraction, but still significant.
*The magnetic induction in repulsion mode reaches ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Important: Results demonstrate friction force of two same neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - precautionary measures
MW 25x2.5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	8.0 cm
Hearing aid	10 Gs (1.0 mT)	6.0 cm
Timepiece	20 Gs (2.0 mT)	5.0 cm
Mobile device	40 Gs (4.0 mT)	4.0 cm
Remote	50 Gs (5.0 mT)	3.5 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

A strong magnetic field is a serious hazard to electronics and medical implants. These neodymiums generate a flux that prevents correct functioning of digital equipment. Notice: the invisible magnetic field penetrates the body and housings. Special caution must be taken by people with hearing aids and insulin pumps. The risk also applies to: automatic timepieces, car keys, speakers, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - warning
MW 25x2.5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	18.55 km/h (5.15 m/s)	0.12 J
30 mm	29.13 km/h (8.09 m/s)	0.30 J
50 mm	37.55 km/h (10.43 m/s)	0.50 J
100 mm	53.10 km/h (14.75 m/s)	1.00 J

NdFeB products are delicate – a violent impact against metal can result in shattering. Control the attraction moment – a neodymium left loose speeds with massive force. Impact energy can cause material chips or painful pinches to fingers. Always hold the magnet during bringing near metal so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear eye protection when working with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 25x2.5 / 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: Electrical data (P_c)
MW 25x2.5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	7 872 Mx	78.7 µWb
P_c Coefficient	0.16	Low (Flat)

Flux value emitted by the magnet pole. Key data for generator designers and motors. P_c value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 25x2.5 / N38

Environment	Effective steel pull	Effect
Air (land)	2.55 kg	Standard
Water (riverbed)	2.92 kg (+0.37 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.

Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.

1. Shear force

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

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) significantly reduces 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) = 0.16

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%

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: 010449-2026

Measurement Calculator

Force (pull)

Kilograms (kg)

Force (N)

lbs

Field Strength

Gauss (Gs)

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MW 15x3 / N38 - cylindrical magnet

1.624 ZŁ brutto / pcs

This product is an exceptionally strong rod magnet, composed of modern NdFeB material, which, at dimensions of Ø25x2.5 mm, guarantees maximum efficiency. This specific item features high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 2.55 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is perfect for building electric motors, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 25.03 N with a weight of only 9.2 g, this rod is indispensable in miniature devices and wherever every gram matters.

Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure long-term durability 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 operational stability. If you need the strongest magnets in the same volume (Ø25x2.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.

The presented product is a neodymium magnet with precisely defined parameters: diameter 25 mm and height 2.5 mm. The value of 25.03 N means that the magnet is capable of holding a weight many times exceeding its own mass of 9.2 g. The product has a [NiCuNi] coating, which secures it 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.

Advantages as well as disadvantages of neodymium magnets.

Strengths

Besides their durability, neodymium magnets are valued for these benefits:

They retain attractive force for almost 10 years – the loss is just ~1% (in theory),
Neodymium magnets are extremely resistant to demagnetization caused by external magnetic fields,
The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to look better,
The surface of neodymium magnets generates a powerful magnetic field – this is a key feature,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
Possibility of individual machining as well as modifying to complex conditions,
Universal use in innovative solutions – they are commonly used in magnetic memories, brushless drives, precision medical tools, as well as other advanced devices.
Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in compact constructions

Cons

Disadvantages of neodymium magnets:

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 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 prevent oxidation as well as corrosion.
Limited ability of producing nuts in the magnet and complex forms - recommended is casing - magnet mounting.
Possible danger resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the context of child safety. Furthermore, small elements of these products are able to disrupt the diagnostic process medical when they are in the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Maximum magnetic pulling force – what it depends on?

The load parameter shown refers to the maximum value, recorded under optimal environment, namely:

with the use of a yoke made of low-carbon steel, ensuring maximum field concentration
with a thickness minimum 10 mm
with an ground contact surface
under conditions of ideal adhesion (metal-to-metal)
for force applied at a right angle (pull-off, not shear)
at standard ambient temperature

Determinants of lifting force in real conditions

Bear in mind that the magnet holding will differ depending on elements below, in order of importance:

Distance – existence of any layer (paint, dirt, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
Load vector – maximum parameter is available only during perpendicular pulling. The force required to slide of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
Chemical composition of the base – low-carbon steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
Surface finish – full contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was determined by applying a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate decreases the load capacity.

H&S for magnets

Danger to the youngest

NdFeB magnets are not intended for children. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which poses a critical condition and requires urgent medical intervention.

Avoid contact if allergic

Studies show that the nickel plating (the usual finish) is a common allergen. For allergy sufferers, refrain from direct skin contact and choose encased magnets.

Data carriers

Avoid bringing magnets close to a purse, computer, or TV. The magnetic field can destroy these devices and erase data from cards.

Do not overheat magnets

Control the heat. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and pulling force.

Respect the power

Handle magnets with awareness. Their immense force can surprise even experienced users. Be vigilant and respect their force.

Impact on smartphones

Remember: neodymium magnets produce a field that interferes with precision electronics. Keep a safe distance from your phone, tablet, and navigation systems.

Eye protection

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Crushing force

Danger of trauma: The attraction force is so great that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.

Fire risk

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

Pacemakers

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Attention! More info about hazards in the article: Magnet Safety Guide.

MW 25x2.5 / N38 - cylindrical magnet

Technical specification of the product - MW 25x2.5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the product - data

Table 1: Static pull force (pull vs distance) - characteristics MW 25x2.5 / N38

Table 2: Sliding hold (vertical surface) MW 25x2.5 / N38

Table 3: Wall mounting (sliding) - vertical pull MW 25x2.5 / N38

Table 4: Material efficiency (substrate influence) - power losses MW 25x2.5 / N38

Table 5: Thermal resistance (material behavior) - thermal limit MW 25x2.5 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MW 25x2.5 / N38

Table 7: Hazards (electronics) - precautionary measures MW 25x2.5 / N38

Table 8: Collisions (kinetic energy) - warning MW 25x2.5 / N38

Table 9: Anti-corrosion coating durability MW 25x2.5 / N38

Table 10: Electrical data (Pc) MW 25x2.5 / N38

Table 11: Hydrostatics and buoyancy MW 25x2.5 / N38

1. Shear force

2. Efficiency vs thickness

3. Temperature resistance

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

Elemental analysis

Environmental data

Force (pull)

Field Strength

Other products

MPL 30x20x20 / N38 - lamellar magnet

MPL 25x15x2 / N38 - lamellar magnet

UMC 16x5/2x5 / N38 - cylindrical magnetic holder

MW 15x3 / N38 - cylindrical magnet

Advantages as well as disadvantages of neodymium magnets.

Strengths

Cons

Pull force analysis

Maximum magnetic pulling force – what it depends on?

Determinants of lifting force in real conditions

H&S for magnets

Danger to the youngest

Avoid contact if allergic

Data carriers

Do not overheat magnets

Respect the power

Impact on smartphones

Eye protection

Crushing force

Fire risk

Pacemakers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - characteristics
MW 25x2.5 / N38

Table 2: Sliding hold (vertical surface)
MW 25x2.5 / N38

Table 3: Wall mounting (sliding) - vertical pull
MW 25x2.5 / N38

Table 4: Material efficiency (substrate influence) - power losses
MW 25x2.5 / N38

Table 5: Thermal resistance (material behavior) - thermal limit
MW 25x2.5 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 25x2.5 / N38

Table 7: Hazards (electronics) - precautionary measures
MW 25x2.5 / N38

Table 8: Collisions (kinetic energy) - warning
MW 25x2.5 / N38

Table 9: Anti-corrosion coating durability
MW 25x2.5 / N38

Table 10: Electrical data (P_c)
MW 25x2.5 / N38

Table 11: Hydrostatics and buoyancy
MW 25x2.5 / N38