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MP 25x12.5x5 / 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 030342

GTIN/EAN: 5906301812289

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

12.5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

13.81 g

Magnetization Direction

↑ axial

Load capacity

5.98 kg / 58.67 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

check properties »

6.20 ZŁ with VAT / pcs + price for transport

5.04 ZŁ net + 23% VAT / pcs

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Physical properties - MP 25x12.5x5 / N38 - ring magnet

Specification / characteristics - MP 25x12.5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030342
GTIN/EAN	5906301812289
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	12.5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	13.81 g
Magnetization Direction	↑ axial
Load capacity ~ ?	5.98 kg / 58.67 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x12.5x5 / 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

Engineering analysis of the product - technical parameters

The following data represent the direct effect of a mathematical simulation. Results are based on algorithms for the material Nd₂Fe₁₄B. Real-world conditions might slightly differ from theoretical values. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static pull force (force vs gap) - characteristics
MP 25x12.5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N	warning
1 mm	5310 Gs 531.0 mT	5.05 kg / 11.14 pounds 5051.8 g / 49.6 N	warning
2 mm	4846 Gs 484.6 mT	4.21 kg / 9.27 pounds 4206.8 g / 41.3 N	warning
3 mm	4397 Gs 439.7 mT	3.46 kg / 7.64 pounds 3464.5 g / 34.0 N	warning
5 mm	3576 Gs 357.6 mT	2.29 kg / 5.05 pounds 2291.1 g / 22.5 N	warning
10 mm	2073 Gs 207.3 mT	0.77 kg / 1.70 pounds 769.7 g / 7.6 N	low risk
15 mm	1231 Gs 123.1 mT	0.27 kg / 0.60 pounds 271.6 g / 2.7 N	low risk
20 mm	773 Gs 77.3 mT	0.11 kg / 0.24 pounds 106.9 g / 1.0 N	low risk
30 mm	356 Gs 35.6 mT	0.02 kg / 0.05 pounds 22.7 g / 0.2 N	low risk
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 pounds 2.4 g / 0.0 N	low risk

Pulling power drops significantly with every mm of distance. Keep in mind that even a microscopic distance (e.g., contamination, varnish, rust) significantly weakens the grip. Magnets operate most effectively at the point of direct contact; gap kills the force. Analyze how rapidly the pull force plummet, when the product does not touch flatly to the steel surface. When designing the arrangement, avoid additional spacers.

Table 2: Vertical capacity (vertical surface)
MP 25x12.5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.20 kg / 2.64 pounds 1196.0 g / 11.7 N
1 mm	Stal (~0.2)	1.01 kg / 2.23 pounds 1010.0 g / 9.9 N
2 mm	Stal (~0.2)	0.84 kg / 1.86 pounds 842.0 g / 8.3 N
3 mm	Stal (~0.2)	0.69 kg / 1.53 pounds 692.0 g / 6.8 N
5 mm	Stal (~0.2)	0.46 kg / 1.01 pounds 458.0 g / 4.5 N
10 mm	Stal (~0.2)	0.15 kg / 0.34 pounds 154.0 g / 1.5 N
15 mm	Stal (~0.2)	0.05 kg / 0.12 pounds 54.0 g / 0.5 N
20 mm	Stal (~0.2)	0.02 kg / 0.05 pounds 22.0 g / 0.2 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The table below indicates the theoretical weight limit sufficient to start the sliding of the magnet down on a vertical steel wall (assuming standard friction). This value is a function of the air gap between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 25x12.5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.79 kg / 3.96 pounds 1794.0 g / 17.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.20 kg / 2.64 pounds 1196.0 g / 11.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.60 kg / 1.32 pounds 598.0 g / 5.9 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.99 kg / 6.59 pounds 2990.0 g / 29.3 N

When placing a magnet on a upright wall (e.g., a fridge), it you can count on barely about 20%-30% of nominal attraction strength. Gravitational force and a low friction coefficient influence the fact that holders slip easier than they detach. Planning a wall mount? Consider that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the magnet will slide down under a significantly smaller weight. Using a rubber pad can effectively raise the stability.

Table 4: Steel thickness (substrate influence) - power losses
MP 25x12.5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.60 kg / 1.32 pounds 598.0 g / 5.9 N
1 mm	25%	1.50 kg / 3.30 pounds 1495.0 g / 14.7 N
2 mm	50%	2.99 kg / 6.59 pounds 2990.0 g / 29.3 N
3 mm	75%	4.49 kg / 9.89 pounds 4485.0 g / 44.0 N
5 mm	100%	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N
10 mm	100%	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N
11 mm	100%	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N
12 mm	100%	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N

A thin sheet is incapable of focus the full magnetic flux, which weakens actual performance of the magnet. Should you mount a strong magnet to a thin surface, the field will penetrate right through and the holding will be smaller. To achieve the maximum of this magnet's potential, you require a sufficiently solid piece of metal. The saturation phenomenon means that on sheet metal structures (e.g., appliance housings), the holder works worse. We advise picking the steel cross-section based on the following data.

Table 5: Thermal stability (material behavior) - power drop
MP 25x12.5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N	OK
40 °C	-2.2%	5.85 kg / 12.89 pounds 5848.4 g / 57.4 N	OK
60 °C	-4.4%	5.72 kg / 12.60 pounds 5716.9 g / 56.1 N	OK
80 °C	-6.6%	5.59 kg / 12.31 pounds 5585.3 g / 54.8 N
100 °C	-28.8%	4.26 kg / 9.39 pounds 4257.8 g / 41.8 N

Classic neodymiums change their properties parameters above the temperature limit. Protect against heat – excessive heat can irreversibly damage this product. As the temperature rises, the magnet's force briefly drops. Refrain from using this product close to heaters higher than its safe range. Too high temperature will lead to permanent loss of magnetic properties.

*Technical advisory: Heat tolerance depends not only on the material grade, as well as the dimension ratios. Thin magnets (pancake types) may lose charge permanently at lower temperatures compared to rod magnets. The danger warning in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 25x12.5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding 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 attract each other from a much further distance than a neodymium and metal combination. The setup of magnet-to-magnet creates a more powerful interaction and a further horizon of action. Want to build a solid fastener? Apply two magnets instead of a neodymium and a striker plate. Exercise caution that when attracting two neodymiums, the collision energy is massive. The levitation is marginally weaker than the connection force, but still significant.
*The magnetic induction between like poles drops to ~0 Gs at the midpoint between the magnets (due to field cancellation).
Attention: Figures show friction force of two same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (implants) - precautionary measures
MP 25x12.5x5 / 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
Mobile device	40 Gs (4.0 mT)	8.0 cm
Car key	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

Extremely neodym field is a large risk to IT equipment and medical implants. These neodymiums produce a flux that destroys function of digital equipment. Remember: the invisible magnetic field penetrates the body and housings. Exceptional care must be taken by people with hearing aids and drug dispensers. Also at risk are: mechanical watches, remotes, speakers, and screens. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - collision effects
MP 25x12.5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.61 km/h (6.28 m/s)	0.27 J
30 mm	36.44 km/h (10.12 m/s)	0.71 J
50 mm	46.94 km/h (13.04 m/s)	1.17 J
100 mm	66.37 km/h (18.43 m/s)	2.35 J

Neodymium magnets are very brittle – a strong collision with metal risks their cracking. Pay attention to connection velocity – a magnet released freely becomes dangerous. Impact energy can trigger coating fragments or dangerous crushing to skin. Always hold the magnet during mounting so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear safety glasses when handling with large magnets.

Table 9: Surface protection spec
MP 25x12.5x5 / 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 (P_c)
MP 25x12.5x5 / 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 magnet pole. Key data when building generators as well as sensors. The P_c coefficient defines the working geometry.

Table 11: Physics of underwater searching
MP 25x12.5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	5.98 kg	Standard
Water (riverbed)	6.85 kg (+0.87 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!

Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Caution: On a vertical surface, the magnet retains just approx. 20-30% of its perpendicular strength.

2. Efficiency vs thickness

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

3. Temperature resistance

*For N38 material, 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

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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%

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: 030342-2026

Measurement Calculator

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MP 20x8x6 / N38 - ring magnet

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The ring-shaped magnet MP 25x12.5x5 / N38 is created for permanent mounting, where glue might fail or be insufficient. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. This product with a force of 5.98 kg works great as a cabinet closure, speaker holder, or mounting element in devices.

This is a crucial issue when working with model MP 25x12.5x5 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because too much pressure will cause the ring to crack. 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. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.

The inner hole diameter determines the maximum size of the mounting element. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.

This model is characterized by dimensions Ø25x5 mm and a weight of 13.81 g. The pulling force of this model is an impressive 5.98 kg, which translates to 58.67 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 12.5 mm.

The poles are located on the planes with holes, not on the sides of the ring. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages as well as disadvantages of rare earth magnets.

Pros

Besides their exceptional field intensity, neodymium magnets offer the following advantages:

They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
They show high resistance to demagnetization induced by external disturbances,
By applying a smooth coating of silver, the element gains an modern look,
Magnets exhibit exceptionally strong magnetic induction on the working surface,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
Possibility of individual machining and adapting to concrete applications,
Significant place in modern industrial fields – they serve a role in HDD drives, drive modules, advanced medical instruments, as well as industrial machines.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Drawbacks and weaknesses of neodymium magnets: application proposals

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
Neodymium magnets lose 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 stability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
We suggest casing - magnetic holder, due to difficulties in creating nuts inside the magnet and complex forms.
Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. Furthermore, tiny parts of these devices can disrupt the diagnostic process medical after entering the body.
With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

The lifting capacity listed is a theoretical maximum value conducted under specific, ideal conditions:

on a plate made of structural steel, effectively closing the magnetic field
possessing a thickness of at least 10 mm to avoid saturation
characterized by smoothness
with zero gap (no coatings)
under axial force vector (90-degree angle)
at temperature room level

Determinants of practical lifting force of a magnet

Real force impacted by working environment parameters, including (from most important):

Distance – the presence of foreign body (paint, dirt, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
Material composition – different alloys attracts identically. Alloy additives weaken the attraction effect.
Smoothness – full contact is possible only on polished steel. Rough texture reduce the real contact area, reducing force.
Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity was measured with the use of a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate lowers the load capacity.

Safe handling of NdFeB magnets

Magnet fragility

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Sensitization to coating

Nickel alert: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, immediately stop working with magnets and wear gloves.

Keep away from electronics

Be aware: neodymium magnets generate a field that interferes with precision electronics. Maintain a safe distance from your mobile, tablet, and GPS.

Danger to the youngest

Product intended for adults. Small elements can be swallowed, leading to serious injuries. Keep out of reach of children and animals.

Immense force

Handle magnets with awareness. Their immense force can surprise even experienced users. Plan your moves and respect their power.

Heat sensitivity

Do not overheat. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Physical harm

Danger of trauma: The attraction force is so great that it can result in blood blisters, crushing, and even bone fractures. Protective gloves are recommended.

Combustion hazard

Drilling and cutting of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Magnetic media

Data protection: Neodymium magnets can damage payment cards and delicate electronics (heart implants, hearing aids, mechanical watches).

Life threat

Warning for patients: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or request help to handle the magnets.

Safety First! Details about risks in the article: Safety of working with magnets.

MP 25x12.5x5 / N38 - ring magnet

Physical properties - MP 25x12.5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the product - technical parameters

Table 1: Static pull force (force vs gap) - characteristics MP 25x12.5x5 / N38

Table 2: Vertical capacity (vertical surface) MP 25x12.5x5 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MP 25x12.5x5 / N38

Table 4: Steel thickness (substrate influence) - power losses MP 25x12.5x5 / N38

Table 5: Thermal stability (material behavior) - power drop MP 25x12.5x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range MP 25x12.5x5 / N38

Table 7: Hazards (implants) - precautionary measures MP 25x12.5x5 / N38

Table 8: Impact energy (kinetic energy) - collision effects MP 25x12.5x5 / N38

Table 9: Surface protection spec MP 25x12.5x5 / N38

Table 10: Electrical data (Pc) MP 25x12.5x5 / N38

Table 11: Physics of underwater searching MP 25x12.5x5 / N38

1. Vertical hold

2. Efficiency vs thickness

3. Temperature resistance

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

Chemical composition

Ecology and recycling (GPSR)

Force (pull)

Field Strength

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MP 20x8x6 / N38 - ring magnet

Advantages as well as disadvantages of rare earth magnets.

Pros

Limitations

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

Determinants of practical lifting force of a magnet

Safe handling of NdFeB magnets

Magnet fragility

Sensitization to coating

Keep away from electronics

Danger to the youngest

Immense force

Heat sensitivity

Physical harm

Combustion hazard

Magnetic media

Life threat

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - characteristics
MP 25x12.5x5 / N38

Table 2: Vertical capacity (vertical surface)
MP 25x12.5x5 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 25x12.5x5 / N38

Table 4: Steel thickness (substrate influence) - power losses
MP 25x12.5x5 / N38

Table 5: Thermal stability (material behavior) - power drop
MP 25x12.5x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 25x12.5x5 / N38

Table 7: Hazards (implants) - precautionary measures
MP 25x12.5x5 / N38

Table 8: Impact energy (kinetic energy) - collision effects
MP 25x12.5x5 / N38

Table 9: Surface protection spec
MP 25x12.5x5 / N38

Table 10: Electrical data (P_c)
MP 25x12.5x5 / N38

Table 11: Physics of underwater searching
MP 25x12.5x5 / N38