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MP 25x8x5 / N38 - ring 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

ring magnet

Catalog no 030196

GTIN/EAN: 5906301812135

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

8 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

16.52 g

Magnetization Direction

↑ axial

Load capacity

7.16 kg / 70.21 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

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Technical details - MP 25x8x5 / N38 - ring magnet

Specification / characteristics - MP 25x8x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030196
GTIN/EAN	5906301812135
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	25 mm [±0,1 mm]
internal diameter Ø	8 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	16.52 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.16 kg / 70.21 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x8x5 / N38 - ring 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 analysis of the assembly - report

The following values are the result of a mathematical analysis. Results were calculated on algorithms for the material Nd₂Fe₁₄B. Operational conditions may deviate from the simulation results. Use these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs gap) - power drop
MP 25x8x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	7.16 kg / 15.79 pounds 7160.0 g / 70.2 N	medium risk
1 mm	5310 Gs 531.0 mT	6.05 kg / 13.33 pounds 6048.6 g / 59.3 N	medium risk
2 mm	4846 Gs 484.6 mT	5.04 kg / 11.10 pounds 5036.9 g / 49.4 N	medium risk
3 mm	4397 Gs 439.7 mT	4.15 kg / 9.15 pounds 4148.2 g / 40.7 N	medium risk
5 mm	3576 Gs 357.6 mT	2.74 kg / 6.05 pounds 2743.2 g / 26.9 N	medium risk
10 mm	2073 Gs 207.3 mT	0.92 kg / 2.03 pounds 921.6 g / 9.0 N	weak grip
15 mm	1231 Gs 123.1 mT	0.33 kg / 0.72 pounds 325.2 g / 3.2 N	weak grip
20 mm	773 Gs 77.3 mT	0.13 kg / 0.28 pounds 128.0 g / 1.3 N	weak grip
30 mm	356 Gs 35.6 mT	0.03 kg / 0.06 pounds 27.2 g / 0.3 N	weak grip
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 pounds 2.8 g / 0.0 N	weak grip

Magnetic force weakens drastically with every subsequent millimeter of gap. Remember that even a microscopic distance (e.g., dirt, varnish, rust) significantly reduces the pull force. Magnets work optimally at the point of direct contact; distance kills the power. See how flashily the pull force drop, when the magnet does not adhere directly to the steel surface. When calculating the arrangement, avoid additional spacers.

Table 2: Shear hold (vertical surface)
MP 25x8x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.43 kg / 3.16 pounds 1432.0 g / 14.0 N
1 mm	Stal (~0.2)	1.21 kg / 2.67 pounds 1210.0 g / 11.9 N
2 mm	Stal (~0.2)	1.01 kg / 2.22 pounds 1008.0 g / 9.9 N
3 mm	Stal (~0.2)	0.83 kg / 1.83 pounds 830.0 g / 8.1 N
5 mm	Stal (~0.2)	0.55 kg / 1.21 pounds 548.0 g / 5.4 N
10 mm	Stal (~0.2)	0.18 kg / 0.41 pounds 184.0 g / 1.8 N
15 mm	Stal (~0.2)	0.07 kg / 0.15 pounds 66.0 g / 0.6 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 pounds 26.0 g / 0.3 N
30 mm	Stal (~0.2)	0.01 kg / 0.01 pounds 6.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

This section indicates the approximate weight limit required to initiate the slippage of the magnet vertically on a upright steel plate (assuming standard friction). This parameter depends on the separation distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MP 25x8x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.15 kg / 4.74 pounds 2148.0 g / 21.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.43 kg / 3.16 pounds 1432.0 g / 14.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.72 kg / 1.58 pounds 716.0 g / 7.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.58 kg / 7.89 pounds 3580.0 g / 35.1 N

When mounting a element on a upright plane (e.g., a fridge), it will maintain just about 1/5 of its nominal power. Gravitational force and a low friction coefficient cause that holders slip faster than they detach. Planning a hanger? Consider that the sliding force is much weaker than the maximum static pull force. On a smooth steel, the element will slip down under a much lighter weight. Application of an anti-slip coating can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 25x8x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.72 kg / 1.58 pounds 716.0 g / 7.0 N
1 mm	25%	1.79 kg / 3.95 pounds 1790.0 g / 17.6 N
2 mm	50%	3.58 kg / 7.89 pounds 3580.0 g / 35.1 N
3 mm	75%	5.37 kg / 11.84 pounds 5370.0 g / 52.7 N
5 mm	100%	7.16 kg / 15.79 pounds 7160.0 g / 70.2 N
10 mm	100%	7.16 kg / 15.79 pounds 7160.0 g / 70.2 N
11 mm	100%	7.16 kg / 15.79 pounds 7160.0 g / 70.2 N
12 mm	100%	7.16 kg / 15.79 pounds 7160.0 g / 70.2 N

A too thin steel is unable to focus the full magnetic flux, which squanders power of the magnet. If you attach a powerful product to a thin surface, the field will pass right through and the attraction force will be weaker. To achieve full efficiency of this magnet's power, you need a suitably thick piece of metal. The material oversaturation causes that on thin elements (e.g., thin profiles), the magnet shows lower pull force. We advise picking the steel dimension based on the following data.

Table 5: Thermal resistance (stability) - thermal limit
MP 25x8x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.16 kg / 15.79 pounds 7160.0 g / 70.2 N	OK
40 °C	-2.2%	7.00 kg / 15.44 pounds 7002.5 g / 68.7 N	OK
60 °C	-4.4%	6.84 kg / 15.09 pounds 6845.0 g / 67.1 N	OK
80 °C	-6.6%	6.69 kg / 14.74 pounds 6687.4 g / 65.6 N
100 °C	-28.8%	5.10 kg / 11.24 pounds 5097.9 g / 50.0 N

Classic neodymiums lose strength past the thermal threshold. Watch out for overheating – high temperature can permanently destroy this magnet. With increasing heat, the neodymium's power momentarily drops. Refrain from using this magnet near heat sources exceeding its working range. Exceeding the critical threshold will cause permanent loss of magnetism.

*Engineering note: Temperature resistance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low Pc) are more susceptible to demagnetization at lower temperatures than long magnets. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 25x8x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	82.42 kg / 181.72 pounds 6 082 Gs	12.36 kg / 27.26 pounds 12364 g / 121.3 N	N/A
1 mm	75.95 kg / 167.44 pounds 11 091 Gs	11.39 kg / 25.12 pounds 11392 g / 111.8 N	68.35 kg / 150.69 pounds ~0 Gs
2 mm	69.63 kg / 153.51 pounds 10 620 Gs	10.44 kg / 23.03 pounds 10445 g / 102.5 N	62.67 kg / 138.16 pounds ~0 Gs
3 mm	63.64 kg / 140.29 pounds 10 153 Gs	9.55 kg / 21.04 pounds 9545 g / 93.6 N	57.27 kg / 126.26 pounds ~0 Gs
5 mm	52.69 kg / 116.16 pounds 9 238 Gs	7.90 kg / 17.42 pounds 7903 g / 77.5 N	47.42 kg / 104.54 pounds ~0 Gs
10 mm	31.58 kg / 69.62 pounds 7 152 Gs	4.74 kg / 10.44 pounds 4737 g / 46.5 N	28.42 kg / 62.66 pounds ~0 Gs
20 mm	10.61 kg / 23.39 pounds 4 145 Gs	1.59 kg / 3.51 pounds 1591 g / 15.6 N	9.55 kg / 21.05 pounds ~0 Gs
50 mm	0.65 kg / 1.43 pounds 1 024 Gs	0.10 kg / 0.21 pounds 97 g / 1.0 N	0.58 kg / 1.28 pounds ~0 Gs
60 mm	0.31 kg / 0.69 pounds 712 Gs	0.05 kg / 0.10 pounds 47 g / 0.5 N	0.28 kg / 0.62 pounds ~0 Gs
70 mm	0.16 kg / 0.36 pounds 514 Gs	0.02 kg / 0.05 pounds 24 g / 0.2 N	0.15 kg / 0.32 pounds ~0 Gs
80 mm	0.09 kg / 0.20 pounds 383 Gs	0.01 kg / 0.03 pounds 14 g / 0.1 N	0.08 kg / 0.18 pounds ~0 Gs
90 mm	0.05 kg / 0.12 pounds 293 Gs	0.01 kg / 0.02 pounds 8 g / 0.1 N	0.05 kg / 0.11 pounds ~0 Gs
100 mm	0.03 kg / 0.07 pounds 230 Gs	0.00 kg / 0.01 pounds 5 g / 0.0 N	0.03 kg / 0.06 pounds ~0 Gs

Two strong neodymiums interact from a wider radius than a neodymium and metal setup. The connection of magnet-to-magnet produces a massive flux and a wider radius of action. Want to build a powerful holder? Utilize two neodymiums instead of one magnet and a steel. Exercise caution that when bringing together two magnets, the pinch force is extreme. The repulsion force is marginally weaker than the attraction, but still significant.
*The magnetic induction in repulsion mode is approximately ~0 Gs in the exact middle of the gap (resulting from vector opposition).
* Figures demonstrate shear force of two same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - precautionary measures
MP 25x8x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	17.0 cm
Hearing aid	10 Gs (1.0 mT)	13.5 cm
Timepiece	20 Gs (2.0 mT)	10.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	8.0 cm
Remote	50 Gs (5.0 mT)	7.5 cm
Payment card	400 Gs (40.0 mT)	3.0 cm
HDD hard drive	600 Gs (60.0 mT)	2.5 cm

Powerful magnet radiation is a serious hazard to IT equipment and medical implants. These NdFeB products generate a flux that disrupts operation of sensitive medical devices. Remember: the unseen radiation penetrates the body and plastic. Special caution must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - collision effects
MP 25x8x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.62 km/h (6.28 m/s)	0.33 J
30 mm	36.45 km/h (10.13 m/s)	0.85 J
50 mm	46.96 km/h (13.04 m/s)	1.41 J
100 mm	66.40 km/h (18.44 m/s)	2.81 J

NdFeB products are prone to chipping – a collision with steel risks their cracking. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Kinetic force can cause material chips or dangerous crushing to skin. Be sure to control the product during installation so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Use safety goggles when working with large magnets.

Table 9: Anti-corrosion coating durability
MP 25x8x5 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MP 25x8x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	24 536 Mx	245.4 µWb
P_c Coefficient	1.03	High (Stable)

Flux value emitted by the pole surface. Key data when building generators as well as sensors. P_c value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 25x8x5 / N38

Environment	Effective steel pull	Effect
Air (land)	7.16 kg	Standard
Water (riverbed)	8.20 kg (+1.04 kg buoyancy gain)	+14.5%

Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.

1. Shear force

*Caution: On a vertical surface, the magnet retains just a fraction of its perpendicular strength.

2. Steel saturation

*Thin steel (e.g. computer case) significantly limits the holding force.

3. Thermal stability

*For N38 grade, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.03

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The P_c (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher P_c value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical and environmental data

Elemental analysis

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

Ecology and recycling (GPSR)

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

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

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

batch number/type

id: 030196-2026

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The ring magnet with a hole MP 25x8x5 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This is a crucial issue when working with model MP 25x8x5 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. One turn too many can destroy the magnet, so do it slowly. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for indoor use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 8 mm fits this model. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Aesthetic mounting requires selecting the appropriate head size.

The presented product is a ring magnet with dimensions Ø25 mm (outer diameter) and height 5 mm. The pulling force of this model is an impressive 7.16 kg, which translates to 70.21 N in newtons. The mounting hole diameter is precisely 8 mm.

The poles are located on the planes with holes, not on the sides of the ring. In the case of connecting two rings, make sure one is turned the right way. We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages and disadvantages of neodymium magnets.

Strengths

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

They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
They possess excellent resistance to magnetism drop as a result of external magnetic sources,
The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to present itself better,
Neodymium magnets create maximum magnetic induction on a small area, which ensures high operational effectiveness,
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 detailed machining and optimizing to precise needs,
Versatile presence in modern industrial fields – they serve a role in HDD drives, drive modules, precision medical tools, and technologically advanced constructions.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Problematic aspects of neodymium magnets: tips and applications.

To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
Due to limitations in producing threads and complex shapes in magnets, we propose using cover - magnetic mechanism.
Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these devices are able to be problematic in diagnostics medical when they are in the body.
With large orders the cost of neodymium magnets can be a barrier,

Holding force characteristics

Magnetic strength at its maximum – what contributes to it?

The specified lifting capacity concerns the maximum value, measured under optimal environment, namely:

on a base made of structural steel, optimally conducting the magnetic flux
possessing a thickness of min. 10 mm to avoid saturation
with an polished touching surface
without any air gap between the magnet and steel
during pulling in a direction perpendicular to the plane
at room temperature

Determinants of lifting force in real conditions

Real force impacted by specific conditions, including (from priority):

Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Load vector – highest force is reached only during perpendicular pulling. The force required to slide of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
Steel grade – the best choice is pure iron steel. Hardened steels may attract less.
Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures 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 a perpendicular force was applied, in contrast under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.

H&S for magnets

Implant safety

For implant holders: Strong magnetic fields affect medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.

Adults only

Product intended for adults. Small elements can be swallowed, causing severe trauma. Store away from children and animals.

Immense force

Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Permanent damage

Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.

Impact on smartphones

Note: rare earth magnets generate a field that disrupts precision electronics. Maintain a separation from your phone, tablet, and GPS.

Fragile material

Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

Safe distance

Do not bring magnets close to a wallet, laptop, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Serious injuries

Mind your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Fire risk

Mechanical processing of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Sensitization to coating

Studies show that nickel (standard magnet coating) is a common allergen. If your skin reacts to metals, avoid direct skin contact and choose versions in plastic housing.

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

MP 25x8x5 / N38 - ring magnet

Technical details - MP 25x8x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical analysis of the assembly - report

Table 1: Static force (pull vs gap) - power drop MP 25x8x5 / N38

Table 2: Shear hold (vertical surface) MP 25x8x5 / N38

Table 3: Vertical assembly (sliding) - vertical pull MP 25x8x5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MP 25x8x5 / N38

Table 5: Thermal resistance (stability) - thermal limit MP 25x8x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MP 25x8x5 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures MP 25x8x5 / N38

Table 8: Impact energy (cracking risk) - collision effects MP 25x8x5 / N38

Table 9: Anti-corrosion coating durability MP 25x8x5 / N38

Table 10: Electrical data (Flux) MP 25x8x5 / N38

Table 11: Underwater work (magnet fishing) MP 25x8x5 / N38

1. Shear force

2. Steel saturation

3. Thermal stability

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

Elemental analysis

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Field

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Advantages and disadvantages of neodymium magnets.

Strengths

Cons

Holding force characteristics

Magnetic strength at its maximum – what contributes to it?

Determinants of lifting force in real conditions

H&S for magnets

Implant safety

Adults only

Immense force

Permanent damage

Impact on smartphones

Fragile material

Safe distance

Serious injuries

Fire risk

Sensitization to coating

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - power drop
MP 25x8x5 / N38

Table 2: Shear hold (vertical surface)
MP 25x8x5 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MP 25x8x5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 25x8x5 / N38

Table 5: Thermal resistance (stability) - thermal limit
MP 25x8x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 25x8x5 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures
MP 25x8x5 / N38

Table 8: Impact energy (cracking risk) - collision effects
MP 25x8x5 / N38

Table 9: Anti-corrosion coating durability
MP 25x8x5 / N38

Table 10: Electrical data (Flux)
MP 25x8x5 / N38

Table 11: Underwater work (magnet fishing)
MP 25x8x5 / N38