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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

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Technical details - 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

Physical modeling of the product - data

Presented data constitute the outcome of a physical simulation. Results are based on models for the material Nd₂Fe₁₄B. Actual conditions may deviate from the simulation results. Please consider these data as a supplementary guide for designers.

Table 1: Static pull force (force vs distance) - power drop
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	medium risk
1 mm	5310 Gs 531.0 mT	5.05 kg / 11.14 pounds 5051.8 g / 49.6 N	medium risk
2 mm	4846 Gs 484.6 mT	4.21 kg / 9.27 pounds 4206.8 g / 41.3 N	medium risk
3 mm	4397 Gs 439.7 mT	3.46 kg / 7.64 pounds 3464.5 g / 34.0 N	medium risk
5 mm	3576 Gs 357.6 mT	2.29 kg / 5.05 pounds 2291.1 g / 22.5 N	medium risk
10 mm	2073 Gs 207.3 mT	0.77 kg / 1.70 pounds 769.7 g / 7.6 N	safe
15 mm	1231 Gs 123.1 mT	0.27 kg / 0.60 pounds 271.6 g / 2.7 N	safe
20 mm	773 Gs 77.3 mT	0.11 kg / 0.24 pounds 106.9 g / 1.0 N	safe
30 mm	356 Gs 35.6 mT	0.02 kg / 0.05 pounds 22.7 g / 0.2 N	safe
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 pounds 2.4 g / 0.0 N	safe

Grip strength weakens drastically with every subsequent millimeter of spacing. Keep in mind that even the smallest gap (e.g., contamination, varnish, veneer) noticeably diminishes the holding power. Magnetic products hold most effectively during direct contact; distance drastically cuts the power. See how quickly the load capacity drop, when the product does not adhere tightly to the metal substrate. When calculating the mounting, avoid unnecessary gaps.

Table 2: Shear hold (wall)
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 following data shows the estimated weight limit sufficient to initiate the shifting of the magnet down against a upright steel plate (considering typical friction coefficient). This value varies with 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 element on a upright plane (e.g., a car body), it will maintain barely about 20%-30% of nominal attraction strength. Gravity and a low friction coefficient influence the fact that holders move down easier than they detach. Planning a hanger? Note that the sliding force is much weaker than the maximum static pull force. On a painted metal, the holder will give way down under a much lighter cargo. Using a rubber pad can significantly increase the grip.

Table 4: Material efficiency (saturation) - sheet metal selection
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 too thin steel is incapable of conduct the full magnetic flux, which wastes potential of the magnet. Should you mount a strong magnet to a thin surface, the flux will pass right through and the attraction force will be weaker. To utilize 100% of this neodymium's potential, you require a sufficiently solid backing of steel. The saturation effect means that on sheet metal structures (e.g., car bodies), the product shows lower pull force. We advise picking the steel thickness according to the table below.

Table 5: Thermal stability (stability) - thermal limit
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

Standard neodymium magnets lose strength after exceeding the maximum temperature. Protect against heat – excessive heat can irreversibly destroy this magnet. As the temperature rises, the neodymium's power temporarily lowers. Refrain from using this product in hot environments higher than its safe range. Ignoring the limit will lead to permanent loss of magnetic properties.

*Technical advisory: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) risk losing magnetic properties under lower heat stress than long magnets. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field collision
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 magnetic products interact from a much further distance than a magnet and sheet setup. The setup of two magnets creates a more powerful interaction and a larger range of performance. Designing a strong closure? Apply two magnets instead of one magnet and a striker plate. Exercise caution that when connecting a pair of magnets, the pinch force is huge. The levitation is marginally weaker than the connection force, but still impressive.
*The magnetic induction for N-N configuration is approximately ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
* Figures demonstrate friction force of a pair of matching magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - 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
Mechanical watch	20 Gs (2.0 mT)	10.5 cm
Phone / Smartphone	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

Powerful magnet radiation poses a real danger to IT equipment as well as medical implants. These magnets generate a flux that destroys function of digital equipment. Notice: the unseen radiation acts through matter and housings. Exceptional care must be taken by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - warning
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

Magnetic elements are prone to chipping – a violent impact against metal can result in shattering. Pay attention to connection velocity – a magnet released freely becomes dangerous. Kinetic force can trigger coating fragments or dangerous crushing to skin. Hold the magnet firmly during installation so it doesn't hit with great force against the metal. A collision at high speed means shattering of the neodymium. Use safety goggles when working with powerful specimens.

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

Table 10: Construction data (Flux)
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 and motors. 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%

Corrosion 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. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Shear force

*Note: On a vertical wall, the magnet holds just ~20% of its perpendicular strength.

2. Plate thickness effect

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

3. Heat tolerance

*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

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%

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: 030342-2026

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The ring-shaped magnet MP 25x12.5x5 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. This product with a force of 5.98 kg works great as a cabinet closure, speaker holder, or spacer 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.

These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but is not sufficient for rain. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for inside building use. For outdoor applications, we recommend choosing rubberized holders or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 12.5 mm fits this model. 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.

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 5.98 kg, which translates to 58.67 N in newtons. The mounting hole diameter is precisely 12.5 mm.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. 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). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Strengths as well as weaknesses of neodymium magnets.

Pros

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

They do not lose power, even after around ten years – the reduction in lifting capacity is only ~1% (according to tests),
Neodymium magnets are characterized by remarkably resistant to magnetic field loss caused by external interference,
By covering with a shiny coating of gold, the element acquires an professional look,
Magnets have impressive magnetic induction on the active area,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Possibility of detailed modeling and adapting to defined requirements,
Huge importance in future technologies – they are used in data components, electromotive mechanisms, diagnostic systems, also complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in small systems

Limitations

Drawbacks and weaknesses of neodymium magnets: tips and applications.

They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
Neodymium magnets lose their force 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 stability 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 stable to moisture, when using outdoors
We suggest casing - magnetic holder, due to difficulties in creating threads inside the magnet and complex shapes.
Health risk resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these devices can be problematic in diagnostics medical in case of swallowing.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

Magnet power is the result of a measurement for ideal contact conditions, including:

on a plate made of mild steel, perfectly concentrating the magnetic field
with a thickness minimum 10 mm
with a surface cleaned and smooth
under conditions of ideal adhesion (metal-to-metal)
during detachment in a direction vertical to the plane
at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the application force will differ subject to the following factors, in order of importance:

Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of nominal force).
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
Material type – the best choice is high-permeability steel. Cast iron may have worse magnetic properties.
Plate texture – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
Temperature – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

H&S for magnets

Heat sensitivity

Do not overheat. NdFeB magnets are sensitive to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).

Respect the power

Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Be predictive.

Danger to the youngest

Neodymium magnets are not suitable for play. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a direct threat to life and necessitates urgent medical intervention.

Implant safety

Patients with a ICD must maintain an absolute distance from magnets. The magnetic field can stop the functioning of the implant.

Sensitization to coating

Studies show that nickel (standard magnet coating) is a strong allergen. For allergy sufferers, avoid touching magnets with bare hands or select versions in plastic housing.

Safe distance

Very strong magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Dust is flammable

Mechanical processing of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Precision electronics

Note: rare earth magnets generate a field that interferes with sensitive sensors. Keep a separation from your phone, device, and navigation systems.

Beware of splinters

Protect your eyes. Magnets can fracture upon violent connection, launching shards into the air. Wear goggles.

Bodily injuries

Big blocks can crush fingers instantly. Do not place your hand between two strong magnets.

Danger! Want to know more? Read our article: Are neodymium magnets dangerous?

MP 25x12.5x5 / N38 - ring magnet

Technical details - MP 25x12.5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the product - data

Table 1: Static pull force (force vs distance) - power drop MP 25x12.5x5 / N38

Table 2: Shear hold (wall) MP 25x12.5x5 / N38

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

Table 4: Material efficiency (saturation) - sheet metal selection MP 25x12.5x5 / N38

Table 5: Thermal stability (stability) - thermal limit MP 25x12.5x5 / N38

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

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

Table 8: Dynamics (cracking risk) - warning MP 25x12.5x5 / N38

Table 9: Anti-corrosion coating durability MP 25x12.5x5 / N38

Table 10: Construction data (Flux) MP 25x12.5x5 / N38

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

1. Shear force

2. Plate thickness effect

3. Heat tolerance

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

Elemental analysis

Sustainability

Pulling force

Field Strength

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Strengths as well as weaknesses of neodymium magnets.

Pros

Limitations

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

Impact of factors on magnetic holding capacity in practice

H&S for magnets

Heat sensitivity

Respect the power

Danger to the youngest

Implant safety

Sensitization to coating

Safe distance

Dust is flammable

Precision electronics

Beware of splinters

Bodily injuries

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - power drop
MP 25x12.5x5 / N38

Table 2: Shear hold (wall)
MP 25x12.5x5 / N38

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

Table 4: Material efficiency (saturation) - sheet metal selection
MP 25x12.5x5 / N38

Table 5: Thermal stability (stability) - thermal limit
MP 25x12.5x5 / N38

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

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

Table 8: Dynamics (cracking risk) - warning
MP 25x12.5x5 / N38

Table 9: Anti-corrosion coating durability
MP 25x12.5x5 / N38

Table 10: Construction data (Flux)
MP 25x12.5x5 / N38

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