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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

product parameters »

3.95 ZŁ with VAT / pcs + price for transport

3.21 ZŁ net + 23% VAT / pcs

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Technical details - 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 simulation of the assembly - report

These data are the direct effect of a mathematical analysis. Values were calculated on models for the class Nd₂Fe₁₄B. Real-world parameters may deviate from the simulation results. Please consider these calculations as a reference point during assembly planning.

Table 1: Static pull force (pull vs distance) - interaction chart
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	medium risk
1 mm	1177 Gs 117.7 mT	2.39 kg / 5.27 LBS 2391.6 g / 23.5 N	medium risk
2 mm	1121 Gs 112.1 mT	2.17 kg / 4.78 LBS 2166.6 g / 21.3 N	medium risk
3 mm	1050 Gs 105.0 mT	1.90 kg / 4.19 LBS 1902.7 g / 18.7 N	low risk
5 mm	887 Gs 88.7 mT	1.36 kg / 2.99 LBS 1358.4 g / 13.3 N	low risk
10 mm	511 Gs 51.1 mT	0.45 kg / 0.99 LBS 450.5 g / 4.4 N	low risk
15 mm	282 Gs 28.2 mT	0.14 kg / 0.30 LBS 137.4 g / 1.3 N	low risk
20 mm	162 Gs 16.2 mT	0.05 kg / 0.10 LBS 45.4 g / 0.4 N	low risk
30 mm	64 Gs 6.4 mT	0.01 kg / 0.02 LBS 7.0 g / 0.1 N	low risk
50 mm	17 Gs 1.7 mT	0.00 kg / 0.00 LBS 0.5 g / 0.0 N	low risk

Grip strength drops significantly with every subsequent millimeter of gap. Note that even a very thin break (e.g., dirt, paint, rust) strongly reduces the pull force. Magnetic products hold optimally at the point of direct contact; air break drastically cuts the force. Observe how flashily the pull force fall, when the magnet does not touch flatly to the steel surface. When planning the assembly, eliminate redundant distances.

Table 2: Slippage hold (wall)
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 following data shows the estimated holding capacity required to initiate the shifting of the magnet vertically on a vertical metal surface (assuming typical friction). The holding force depends on the gap size between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
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 placing a magnet on a vertical wall (e.g., a car body), it will maintain just approx. 1/5 of nominal attraction strength. Gravity and a low friction coefficient influence the fact that holders move down faster than they pull off. Designing a wall mount? Consider that the sliding force is much weaker than the maximum static pull force. On a painted metal, the holder will slip down under a significantly smaller load. Using a rubber layer can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
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 is incapable of 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 pass right through and the attraction force will be weaker. To achieve full efficiency of this magnet's power, you require a sufficiently solid piece of metal. The material oversaturation causes that on sheet metal structures (e.g., appliance housings), the product holds weaker. We suggest choosing the steel dimension according to the table below.

Table 5: Thermal resistance (stability) - 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

Ordinary NdFeB products change their properties power past the thermal threshold. Watch out for overheating – heat can permanently destroy this magnet. With every degree above norm, the magnet's capacity momentarily decreases. Do not use this product close to heaters higher than its working range. Exceeding the critical threshold will lead to destruction of magnetic properties.

*Important note: Thermal stability is determined by both grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) are more susceptible to demagnetization sooner than long magnets. Warning indicator in the table points to permanent field degradation for this specific geometry.

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

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear 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 magnets attract each other from a wider radius than a neodymium and metal setup. The setup of magnet-to-magnet produces a massive flux and a wider radius of action. Want to build a powerful holder? Apply two magnets instead of one magnet and a steel. Exercise caution that when bringing together two magnets, the collision energy is extreme. The repulsion force is marginally weaker than the attraction, but still large.
*Flux density between like poles is approximately ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Note: Estimates apply to shear force of two identical magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Hazards (implants) - 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
Mechanical watch	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

Powerful magnet radiation poses a serious hazard to electronics as well as pacemakers. These neodymiums generate a flux that prevents correct functioning of digital equipment. Be aware: the invisible magnetic field passes through tissues and housings. Increased vigilance must be taken by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, remotes, speakers, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
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

Magnetic elements are prone to chipping – a violent impact against metal can result in shattering. Watch the impact speed – a magnet released freely becomes dangerous. Impact energy can trigger coating fragments or injury to fingers. Hold the magnet firmly during installation so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h means shattering of the magnet. Use safety goggles when playing with powerful specimens.

Table 9: Coating parameters (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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Improper coating selection is the most common cause of magnet failure over time.

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

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

Total magnetic flux passing through the pole surface. Essential parameter in coil applications as well as sensors. P_c value defines the magnet's operating point.

Table 11: Physics of underwater searching
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

In water, the magnet feels stronger thanks to Archimedes' principle. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

*Caution: On a vertical wall, the magnet holds merely approx. 20-30% of its max power.

2. Steel thickness impact

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

3. Power loss vs temp

*For standard magnets, the critical 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.

Engineering data and GPSR

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%

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: 010449-2026

Measurement Calculator

Force (pull)

Kilograms (kg)

Force in lbs

Field Strength

Gauss (Gs)

Induction (T)

Insert data into any field, and the remaining fields will convert on the fly.

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This product is an exceptionally strong rod magnet, produced from durable NdFeB material, which, at dimensions of Ø25x2.5 mm, guarantees optimal power. The MW 25x2.5 / N38 model features an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 2.55 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing 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 pull force of 25.03 N with a weight of only 9.2 g, this rod is indispensable in electronics and wherever every gram matters.

Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 25.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.

Magnets NdFeB grade N38 are suitable for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø25x2.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

This model is characterized by dimensions Ø25x2.5 mm, which, at a weight of 9.2 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 2.55 kg (force ~25.03 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.

This rod magnet is magnetized axially (along the height of 2.5 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Strengths as well as weaknesses of neodymium magnets.

Pros

Besides their tremendous strength, neodymium magnets offer the following advantages:

They virtually do not lose power, because even after ten years the performance loss is only ~1% (according to literature),
They do not lose their magnetic properties even under external field action,
Thanks to the glossy finish, the surface of nickel, gold, or silver-plated gives an visually attractive appearance,
Neodymium magnets deliver maximum magnetic induction on a their surface, which ensures high operational effectiveness,
Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures reaching 230°C and above...
Possibility of custom forming as well as adjusting to concrete applications,
Wide application in electronics industry – they find application in mass storage devices, electric drive systems, medical equipment, as well as multitasking production systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Problematic aspects of neodymium magnets and ways of using them

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also increases their durability
We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
We suggest cover - magnetic mount, due to difficulties in producing nuts inside the magnet and complicated forms.
Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child health protection. Furthermore, tiny parts of these devices are able to disrupt the diagnostic process medical after entering the body.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum holding power of the magnet – what affects it?

The specified lifting capacity represents the peak performance, recorded under optimal environment, specifically:

using a sheet made of low-carbon steel, acting as a magnetic yoke
possessing a massiveness of minimum 10 mm to avoid saturation
characterized by smoothness
under conditions of ideal adhesion (metal-to-metal)
under vertical force direction (90-degree angle)
at standard ambient temperature

Lifting capacity in practice – influencing factors

Real force impacted by working environment parameters, such as (from priority):

Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
Load vector – highest force is available only during pulling at a 90° angle. The shear force of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
Plate thickness – too thin steel does not accept the full field, causing part of the flux to be escaped into the air.
Steel type – low-carbon steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
Smoothness – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity was assessed using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate reduces the lifting capacity.

Safe handling of NdFeB magnets

ICD Warning

For implant holders: Strong magnetic fields disrupt electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.

Physical harm

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

Conscious usage

Before use, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Allergic reactions

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If redness happens, immediately stop handling magnets and wear gloves.

Impact on smartphones

GPS units and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Flammability

Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Beware of splinters

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

Keep away from computers

Intense magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Stay away of at least 10 cm.

Permanent damage

Keep cool. Neodymium magnets are sensitive to temperature. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Swallowing risk

Absolutely keep magnets away from children. Choking hazard is significant, and the effects of magnets clamping inside the body are very dangerous.

Important! Need more info? Check our post: Are neodymium magnets dangerous?

MW 25x2.5 / N38 - cylindrical magnet

Technical details - MW 25x2.5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the assembly - report

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

Table 2: Slippage hold (wall) MW 25x2.5 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MW 25x2.5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MW 25x2.5 / N38

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

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

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

Table 8: Dynamics (cracking risk) - collision effects MW 25x2.5 / N38

Table 9: Coating parameters (durability) MW 25x2.5 / N38

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

Table 11: Physics of underwater searching MW 25x2.5 / N38

1. Sliding resistance

2. Steel thickness impact

3. Power loss vs temp

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

Material specification

Sustainability

Force (pull)

Field Strength

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Strengths as well as weaknesses of neodymium magnets.

Pros

Disadvantages

Holding force characteristics

Maximum holding power of the magnet – what affects it?

Lifting capacity in practice – influencing factors

Safe handling of NdFeB magnets

ICD Warning

Physical harm

Conscious usage

Allergic reactions

Impact on smartphones

Flammability

Beware of splinters

Keep away from computers

Permanent damage

Swallowing risk

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Slippage hold (wall)
MW 25x2.5 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 25x2.5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 25x2.5 / N38

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

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

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

Table 8: Dynamics (cracking risk) - collision effects
MW 25x2.5 / N38

Table 9: Coating parameters (durability)
MW 25x2.5 / N38

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

Table 11: Physics of underwater searching
MW 25x2.5 / N38