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MW 25x6 / 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 010050

GTIN/EAN: 5906301810490

5.00

Diameter Ø

25 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

22.09 g

Magnetization Direction

↑ axial

Load capacity

10.27 kg / 100.71 N

Magnetic Induction

268.21 mT / 2682 Gs

Coating

[NiCuNi] Nickel

technical parameters »

7.40 ZŁ with VAT / pcs + price for transport

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Technical - MW 25x6 / N38 - cylindrical magnet

Specification / characteristics - MW 25x6 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010050
GTIN/EAN	5906301810490
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	6 mm [±0,1 mm]
Weight	22.09 g
Magnetization Direction	↑ axial
Load capacity ~ ?	10.27 kg / 100.71 N
Magnetic Induction ~ ?	268.21 mT / 2682 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 25x6 / 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 magnet - data

The following values represent the result of a mathematical simulation. Results rely on models for the material Nd₂Fe₁₄B. Actual performance might slightly differ. Treat these data as a preliminary roadmap when designing systems.

Table 1: Static force (pull vs distance) - power drop
MW 25x6 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2682 Gs 268.2 mT	10.27 kg / 22.64 lbs 10270.0 g / 100.7 N	dangerous!
1 mm	2535 Gs 253.5 mT	9.18 kg / 20.23 lbs 9177.2 g / 90.0 N	strong
2 mm	2363 Gs 236.3 mT	7.97 kg / 17.57 lbs 7971.8 g / 78.2 N	strong
3 mm	2176 Gs 217.6 mT	6.76 kg / 14.91 lbs 6761.0 g / 66.3 N	strong
5 mm	1793 Gs 179.3 mT	4.59 kg / 10.13 lbs 4592.7 g / 45.1 N	strong
10 mm	1013 Gs 101.3 mT	1.46 kg / 3.23 lbs 1464.5 g / 14.4 N	safe
15 mm	565 Gs 56.5 mT	0.46 kg / 1.00 lbs 455.3 g / 4.5 N	safe
20 mm	330 Gs 33.0 mT	0.16 kg / 0.34 lbs 155.7 g / 1.5 N	safe
30 mm	134 Gs 13.4 mT	0.03 kg / 0.06 lbs 25.6 g / 0.3 N	safe
50 mm	36 Gs 3.6 mT	0.00 kg / 0.00 lbs 1.9 g / 0.0 N	safe

Grip strength drops sharply with every mm of gap. Note that even a microscopic distance (e.g., contamination, varnish, dust) strongly weakens the grip. Neodymiums hold most effectively in perfect adhesion; distance kills the power. Observe how quickly the parameters drop, when the product does not adhere directly to the steel surface. When planning the arrangement, discard additional spacers.

Table 2: Sliding hold (vertical surface)
MW 25x6 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	2.05 kg / 4.53 lbs 2054.0 g / 20.1 N
1 mm	Stal (~0.2)	1.84 kg / 4.05 lbs 1836.0 g / 18.0 N
2 mm	Stal (~0.2)	1.59 kg / 3.51 lbs 1594.0 g / 15.6 N
3 mm	Stal (~0.2)	1.35 kg / 2.98 lbs 1352.0 g / 13.3 N
5 mm	Stal (~0.2)	0.92 kg / 2.02 lbs 918.0 g / 9.0 N
10 mm	Stal (~0.2)	0.29 kg / 0.64 lbs 292.0 g / 2.9 N
15 mm	Stal (~0.2)	0.09 kg / 0.20 lbs 92.0 g / 0.9 N
20 mm	Stal (~0.2)	0.03 kg / 0.07 lbs 32.0 g / 0.3 N
30 mm	Stal (~0.2)	0.01 kg / 0.01 lbs 6.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The table below shows the approximate weight limit necessary to initiate the slippage of the magnet down along a vertical steel wall (considering typical friction coefficient). This parameter is a function of the separation distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 25x6 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	3.08 kg / 6.79 lbs 3081.0 g / 30.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	2.05 kg / 4.53 lbs 2054.0 g / 20.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.03 kg / 2.26 lbs 1027.0 g / 10.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	5.14 kg / 11.32 lbs 5135.0 g / 50.4 N

When hanging a holder on a upright plane (e.g., a car body), it you can count on only about 1/5 of its nominal power. Gravity and a weak degree of grip influence the fact that magnets slip faster than they pull off. Designing a wall mount? Consider that the sliding force is significantly lower than the perpendicular breakaway force. On a slippery surface, the holder will slide down under a significantly smaller weight. Utilizing a rubberized layer can drastically improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MW 25x6 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.51 kg / 1.13 lbs 513.5 g / 5.0 N
1 mm	13%	1.28 kg / 2.83 lbs 1283.8 g / 12.6 N
2 mm	25%	2.57 kg / 5.66 lbs 2567.5 g / 25.2 N
3 mm	38%	3.85 kg / 8.49 lbs 3851.3 g / 37.8 N
5 mm	63%	6.42 kg / 14.15 lbs 6418.7 g / 63.0 N
10 mm	100%	10.27 kg / 22.64 lbs 10270.0 g / 100.7 N
11 mm	100%	10.27 kg / 22.64 lbs 10270.0 g / 100.7 N
12 mm	100%	10.27 kg / 22.64 lbs 10270.0 g / 100.7 N

A thin metal plate is unable to focus the full magnetic flux, which weakens actual performance of the magnet. Should you install a neodymium to a too thin substrate, the flux will pass right through and the pull force will drop sharply. To squeeze the maximum of this magnet's potential, you require a sufficiently solid piece of steel. The saturation phenomenon means that on delicate walls (e.g., car bodies), the product works worse. We suggest choosing the steel cross-section based on the following data.

Table 5: Thermal resistance (stability) - resistance threshold
MW 25x6 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	10.27 kg / 22.64 lbs 10270.0 g / 100.7 N	OK
40 °C	-2.2%	10.04 kg / 22.14 lbs 10044.1 g / 98.5 N	OK
60 °C	-4.4%	9.82 kg / 21.65 lbs 9818.1 g / 96.3 N
80 °C	-6.6%	9.59 kg / 21.15 lbs 9592.2 g / 94.1 N
100 °C	-28.8%	7.31 kg / 16.12 lbs 7312.2 g / 71.7 N

Ordinary NdFeB products lose power past the thermal threshold. Avoid high temperatures – high temperature can irreversibly damage this magnet. With increasing heat, the neodymium's force temporarily drops. Refrain from using this product close to ovens higher than its working range. Ignoring the limit will result in permanent loss of magnetic properties.

*Important note: Thermal stability is determined by both grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) may lose charge permanently at lower temperatures compared to rod magnets. Warning indicator in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - forces in the system
MW 25x6 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	21.76 kg / 47.98 lbs 4 291 Gs	3.26 kg / 7.20 lbs 3264 g / 32.0 N	N/A
1 mm	20.66 kg / 45.54 lbs 5 225 Gs	3.10 kg / 6.83 lbs 3098 g / 30.4 N	18.59 kg / 40.98 lbs ~0 Gs
2 mm	19.45 kg / 42.87 lbs 5 070 Gs	2.92 kg / 6.43 lbs 2917 g / 28.6 N	17.50 kg / 38.58 lbs ~0 Gs
3 mm	18.18 kg / 40.09 lbs 4 902 Gs	2.73 kg / 6.01 lbs 2727 g / 26.8 N	16.36 kg / 36.08 lbs ~0 Gs
5 mm	15.60 kg / 34.39 lbs 4 541 Gs	2.34 kg / 5.16 lbs 2340 g / 23.0 N	14.04 kg / 30.95 lbs ~0 Gs
10 mm	9.73 kg / 21.46 lbs 3 587 Gs	1.46 kg / 3.22 lbs 1460 g / 14.3 N	8.76 kg / 19.31 lbs ~0 Gs
20 mm	3.10 kg / 6.84 lbs 2 025 Gs	0.47 kg / 1.03 lbs 465 g / 4.6 N	2.79 kg / 6.16 lbs ~0 Gs
50 mm	0.13 kg / 0.28 lbs 409 Gs	0.02 kg / 0.04 lbs 19 g / 0.2 N	0.11 kg / 0.25 lbs ~0 Gs
60 mm	0.05 kg / 0.12 lbs 268 Gs	0.01 kg / 0.02 lbs 8 g / 0.1 N	0.05 kg / 0.11 lbs ~0 Gs
70 mm	0.03 kg / 0.06 lbs 183 Gs	0.00 kg / 0.01 lbs 4 g / 0.0 N	0.02 kg / 0.05 lbs ~0 Gs
80 mm	0.01 kg / 0.03 lbs 131 Gs	0.00 kg / 0.00 lbs 2 g / 0.0 N	0.01 kg / 0.03 lbs ~0 Gs
90 mm	0.01 kg / 0.02 lbs 96 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 72 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnetic products interact from a significantly greater distance than a magnet and sheet setup. The setup of magnet-to-magnet creates a more powerful interaction and a further horizon of operation. Planning to create a solid fastener? Utilize two neodymiums instead of a neodymium and a steel. Remember that when bringing together two magnets, the impact force is huge. The levitation is marginally weaker than the attraction, but still significant.
*Flux density between like poles reaches ~0 Gs at the midpoint of the gap (resulting from vector opposition).
* Results demonstrate friction force of dual matching magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (electronics) - precautionary measures
MW 25x6 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	10.5 cm
Hearing aid	10 Gs (1.0 mT)	8.0 cm
Timepiece	20 Gs (2.0 mT)	6.5 cm
Mobile device	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 poses a large risk to electronic devices and pacemakers. These neodymiums produce a flux that disrupts operation of sensitive medical devices. Notice: the unseen radiation acts through matter and housings. Increased vigilance must be exercised by people with hearing aids and insulin pumps. The risk also applies to: automatic timepieces, car keys, membranes, and screens. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MW 25x6 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	23.60 km/h (6.56 m/s)	0.47 J
30 mm	37.72 km/h (10.48 m/s)	1.21 J
50 mm	48.63 km/h (13.51 m/s)	2.02 J
100 mm	68.77 km/h (19.10 m/s)	4.03 J

NdFeB products are delicate – a violent impact against metal risks their cracking. Pay attention to connection velocity – a magnet released freely speeds with massive force. Kinetic force can cause material chips or painful pinches to skin. Hold the magnet firmly during installation so it doesn't hit violently 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: Corrosion resistance
MW 25x6 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (P_c)
MW 25x6 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	14 740 Mx	147.4 µWb
P_c Coefficient	0.34	Low (Flat)

Total magnetic flux passing through the pole surface. Essential parameter when building generators and motors. The P_c coefficient determines the magnet's operating point.

Table 11: Physics of underwater searching
MW 25x6 / N38

Environment	Effective steel pull	Effect
Air (land)	10.27 kg	Standard
Water (riverbed)	11.76 kg (+1.49 kg buoyancy gain)	+14.5%

Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Water displaces steel, making heavy objects slightly lighter. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Wall mount (shear)

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

2. Steel thickness impact

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

3. Thermal stability

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.34

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

Chemical composition

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: 010050-2026

Measurement Calculator

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The presented product is an exceptionally strong cylindrical magnet, composed of modern NdFeB material, which, with dimensions of Ø25x6 mm, guarantees maximum efficiency. The MW 25x6 / N38 component boasts high dimensional repeatability and professional build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 10.27 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is created for building generators, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 100.71 N with a weight of only 22.09 g, this rod is indispensable in miniature devices and wherever low weight is crucial.

Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 25.1 mm) using two-component epoxy glues. To ensure stability in industry, 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 popular standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø25x6), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.

This model is characterized by dimensions Ø25x6 mm, which, at a weight of 22.09 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 10.27 kg (force ~100.71 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.

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.

Advantages and disadvantages of Nd₂Fe₁₄B magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:

They do not lose power, even during nearly 10 years – the drop in power is only ~1% (theoretically),
They have excellent resistance to magnetic field loss as a result of opposing magnetic fields,
In other words, due to the smooth surface of gold, the element is aesthetically pleasing,
Neodymium magnets achieve maximum magnetic induction on a small area, which allows for strong attraction,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to freedom in shaping and the ability to customize to client solutions,
Huge importance in modern industrial fields – they find application in magnetic memories, electric drive systems, advanced medical instruments, also other advanced devices.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in compact constructions

Cons

Disadvantages of neodymium magnets:

To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
Limited ability of creating threads in the magnet and complex shapes - recommended is a housing - magnet mounting.
Health risk resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Furthermore, tiny parts of these products are able to be problematic in diagnostics medical in case of swallowing.
With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Magnetic strength at its maximum – what contributes to it?

Information about lifting capacity was determined for the most favorable conditions, taking into account:

with the use of a sheet made of special test steel, ensuring full magnetic saturation
possessing a thickness of at least 10 mm to avoid saturation
with a plane free of scratches
without the slightest air gap between the magnet and steel
during detachment in a direction perpendicular to the mounting surface
in stable room temperature

Determinants of lifting force in real conditions

It is worth knowing that the magnet holding will differ subject to elements below, in order of importance:

Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
Metal type – different alloys reacts the same. High carbon content worsen the attraction effect.
Smoothness – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

H&S for magnets

Warning for heart patients

Patients with a pacemaker must maintain an absolute distance from magnets. The magnetic field can disrupt the operation of the life-saving device.

Do not overheat magnets

Monitor thermal conditions. Exposing the magnet to high heat will ruin its properties and pulling force.

Protect data

Device Safety: Neodymium magnets can damage data carriers and delicate electronics (heart implants, medical aids, mechanical watches).

Fire warning

Fire warning: Neodymium dust is explosive. Do not process magnets in home conditions as this risks ignition.

Allergy Warning

Certain individuals have a contact allergy to Ni, which is the typical protective layer for NdFeB magnets. Prolonged contact may cause skin redness. We strongly advise use safety gloves.

GPS and phone interference

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

Serious injuries

Protect your hands. Two large magnets will join immediately with a force of massive weight, crushing anything in their path. Be careful!

Powerful field

Handle with care. Rare earth magnets act from a long distance and connect with massive power, often faster than you can react.

Danger to the youngest

These products are not suitable for play. Accidental ingestion of multiple magnets can lead to them connecting inside the digestive tract, which poses a critical condition and requires urgent medical intervention.

Shattering risk

Neodymium magnets are ceramic materials, which means they are very brittle. Clashing of two magnets leads to them shattering into small pieces.

Warning! Want to know more? Check our post: Why are neodymium magnets dangerous?

MW 25x6 / N38 - cylindrical magnet

Technical - MW 25x6 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the magnet - data

Table 1: Static force (pull vs distance) - power drop MW 25x6 / N38

Table 2: Sliding hold (vertical surface) MW 25x6 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MW 25x6 / N38

Table 4: Steel thickness (substrate influence) - power losses MW 25x6 / N38

Table 5: Thermal resistance (stability) - resistance threshold MW 25x6 / N38

Table 6: Two magnets (repulsion) - forces in the system MW 25x6 / N38

Table 7: Hazards (electronics) - precautionary measures MW 25x6 / N38

Table 8: Dynamics (cracking risk) - collision effects MW 25x6 / N38

Table 9: Corrosion resistance MW 25x6 / N38

Table 10: Construction data (Pc) MW 25x6 / N38

Table 11: Physics of underwater searching MW 25x6 / N38

1. Wall mount (shear)

2. Steel thickness impact

3. Thermal stability

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

Chemical composition

Sustainability

Pulling force

Magnetic Field

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MW 3x1 / N38 - cylindrical magnet

MPL 20x8x6 / N38 - lamellar magnet

UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread

Advantages and disadvantages of Nd2Fe14B magnets.

Pros

Cons

Pull force analysis

Magnetic strength at its maximum – what contributes to it?

Determinants of lifting force in real conditions

H&S for magnets

Warning for heart patients

Do not overheat magnets

Protect data

Fire warning

Allergy Warning

GPS and phone interference

Serious injuries

Powerful field

Danger to the youngest

Shattering risk

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - power drop
MW 25x6 / N38

Table 2: Sliding hold (vertical surface)
MW 25x6 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 25x6 / N38

Table 4: Steel thickness (substrate influence) - power losses
MW 25x6 / N38

Table 5: Thermal resistance (stability) - resistance threshold
MW 25x6 / N38

Table 6: Two magnets (repulsion) - forces in the system
MW 25x6 / N38

Table 7: Hazards (electronics) - precautionary measures
MW 25x6 / N38

Table 8: Dynamics (cracking risk) - collision effects
MW 25x6 / N38

Table 9: Corrosion resistance
MW 25x6 / N38

Table 10: Construction data (P_c)
MW 25x6 / N38

Table 11: Physics of underwater searching
MW 25x6 / N38

Advantages and disadvantages of Nd₂Fe₁₄B magnets.