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MP 25x5x5 / N38 - ring magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, mazowieckie, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500 PLN
Rating: 5

ring magnet

Catalog no 030193

GTIN/EAN: 5906301812104

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

17.67 g

Magnetization Direction

↑ axial

Load capacity

7.66 kg / 75.12 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

technical parameters »

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Product card - MP 25x5x5 / N38 - ring magnet

Specification / characteristics - MP 25x5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030193
GTIN/EAN	5906301812104
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	5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	17.67 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.66 kg / 75.12 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x5x5 / 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 simulation of the magnet - technical parameters

The following information constitute the outcome of a mathematical simulation. Results were calculated on algorithms for the material Nd₂Fe₁₄B. Operational parameters might slightly deviate from the simulation results. Use these data as a reference point when designing systems.

Table 1: Static pull force (pull vs gap) - characteristics
MP 25x5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N	strong
1 mm	5310 Gs 531.0 mT	6.47 kg / 14.27 lbs 6471.0 g / 63.5 N	strong
2 mm	4846 Gs 484.6 mT	5.39 kg / 11.88 lbs 5388.6 g / 52.9 N	strong
3 mm	4397 Gs 439.7 mT	4.44 kg / 9.78 lbs 4437.9 g / 43.5 N	strong
5 mm	3576 Gs 357.6 mT	2.93 kg / 6.47 lbs 2934.8 g / 28.8 N	strong
10 mm	2073 Gs 207.3 mT	0.99 kg / 2.17 lbs 985.9 g / 9.7 N	safe
15 mm	1231 Gs 123.1 mT	0.35 kg / 0.77 lbs 347.9 g / 3.4 N	safe
20 mm	773 Gs 77.3 mT	0.14 kg / 0.30 lbs 137.0 g / 1.3 N	safe
30 mm	356 Gs 35.6 mT	0.03 kg / 0.06 lbs 29.0 g / 0.3 N	safe
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 lbs 3.0 g / 0.0 N	safe

Grip strength drops drastically per each millimeter of gap. Note that even a very thin break (e.g., contamination, paint, rust) significantly reduces the pull force. Magnetic products operate most effectively during direct contact; gap drastically cuts the power. Analyze how rapidly the parameters fall, when the product does not touch flatly to the metal substrate. When designing the assembly, eliminate redundant distances.

Table 2: Shear load (wall)
MP 25x5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.53 kg / 3.38 lbs 1532.0 g / 15.0 N
1 mm	Stal (~0.2)	1.29 kg / 2.85 lbs 1294.0 g / 12.7 N
2 mm	Stal (~0.2)	1.08 kg / 2.38 lbs 1078.0 g / 10.6 N
3 mm	Stal (~0.2)	0.89 kg / 1.96 lbs 888.0 g / 8.7 N
5 mm	Stal (~0.2)	0.59 kg / 1.29 lbs 586.0 g / 5.7 N
10 mm	Stal (~0.2)	0.20 kg / 0.44 lbs 198.0 g / 1.9 N
15 mm	Stal (~0.2)	0.07 kg / 0.15 lbs 70.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 28.0 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 defines the theoretical force required to cause the sliding of the magnet down against a upright metal surface (assuming typical friction coefficient). The holding force depends on the distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 25x5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.30 kg / 5.07 lbs 2298.0 g / 22.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.53 kg / 3.38 lbs 1532.0 g / 15.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.77 kg / 1.69 lbs 766.0 g / 7.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.83 kg / 8.44 lbs 3830.0 g / 37.6 N

When mounting a holder on a vertical wall (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 mean that magnets slip faster than they detach. Want to create a wall mount? Remember that the sliding force is noticeably lower than the perpendicular breakaway force. On a painted metal, the element will slide down under a noticeably lighter load. Using a rubber coating can effectively raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MP 25x5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.77 kg / 1.69 lbs 766.0 g / 7.5 N
1 mm	25%	1.92 kg / 4.22 lbs 1915.0 g / 18.8 N
2 mm	50%	3.83 kg / 8.44 lbs 3830.0 g / 37.6 N
3 mm	75%	5.75 kg / 12.67 lbs 5745.0 g / 56.4 N
5 mm	100%	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N
10 mm	100%	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N
11 mm	100%	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N
12 mm	100%	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N

A too thin steel is not enough to absorb the entire magnetic field, which wastes potential of the magnet. If you attach a powerful product to a weak sheet, the flux will penetrate right through and the holding will be smaller. To utilize the maximum of this neodymium's potential, you need a suitably thick element of metal. The material oversaturation means that on sheet metal structures (e.g., car bodies), the magnet works worse. We advise picking the steel thickness based on the following data.

Table 5: Working in heat (material behavior) - resistance threshold
MP 25x5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.66 kg / 16.89 lbs 7660.0 g / 75.1 N	OK
40 °C	-2.2%	7.49 kg / 16.52 lbs 7491.5 g / 73.5 N	OK
60 °C	-4.4%	7.32 kg / 16.14 lbs 7323.0 g / 71.8 N	OK
80 °C	-6.6%	7.15 kg / 15.77 lbs 7154.4 g / 70.2 N
100 °C	-28.8%	5.45 kg / 12.02 lbs 5453.9 g / 53.5 N

Ordinary NdFeB products change their properties strength past the thermal threshold. Avoid high temperatures – high temperature can permanently demagnetize this product. With increasing heat, the magnet's power briefly drops. Avoid using this product close to heaters higher than its safe range. Ignoring the limit will cause destruction of magnetic properties.

*Technical advisory: Heat tolerance depends not only on the material grade, but also on the magnet's shape. 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: Two magnets (attraction) - field range
MP 25x5x5 / N38

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

Two magnets interact from a much further distance than a magnet and steel setup. Such a system of magnet-to-magnet produces a massive flux and a larger range of performance. Designing a solid fastener? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the impact force is massive. The repulsion force is slightly lower than the attraction, but still impressive.
*Flux density in repulsion mode reaches ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
* Figures demonstrate shear force of two identical neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - warnings
MP 25x5x5 / 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
Mobile device	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

Extremely neodym field poses a large risk to IT equipment and pacemakers. These NdFeB products generate a flux that prevents correct functioning of sensitive medical devices. Notice: the unseen radiation penetrates the body and housings. Special caution must be exercised by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, car keys, speakers, and screens. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - collision effects
MP 25x5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.62 km/h (6.28 m/s)	0.35 J
30 mm	36.46 km/h (10.13 m/s)	0.91 J
50 mm	46.96 km/h (13.05 m/s)	1.50 J
100 mm	66.40 km/h (18.45 m/s)	3.01 J

NdFeB products are very brittle – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely speeds with massive force. Impact energy can destroy the magnet or injury to skin. Hold the magnet firmly during mounting so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Wear safety glasses when working with powerful specimens.

Table 9: Corrosion resistance
MP 25x5x5 / 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 (Flux)
MP 25x5x5 / 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. Essential parameter when building generators as well as sensors. The P_c coefficient determines the working geometry.

Table 11: Submerged application
MP 25x5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	7.66 kg	Standard
Water (riverbed)	8.77 kg (+1.11 kg buoyancy gain)	+14.5%

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

Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.

1. Sliding resistance

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

2. Efficiency vs thickness

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

3. Thermal stability

*For N38 grade, the safety 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 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%

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: 030193-2026

Quick Unit Converter

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Force (N)

Pounds (lbs)

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Gauss (Gs)

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The ring-shaped magnet MP 25x5x5 / N38 is created for permanent mounting, where glue might fail or be insufficient. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. This product with a force of 7.66 kg works great as a cabinet closure, speaker holder, or mounting element in devices.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. One turn too many can destroy the magnet, so do it slowly. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. 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. 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. 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.

It is a magnetic ring with a diameter of 25 mm and thickness 5 mm. The pulling force of this model is an impressive 7.66 kg, which translates to 75.12 N in newtons. The mounting hole diameter is precisely 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 Nd₂Fe₁₄B magnets.

Advantages

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

They have constant strength, and over nearly ten years their attraction force decreases symbolically – ~1% (in testing),
They maintain their magnetic properties even under external field action,
Thanks to the shiny finish, the surface of Ni-Cu-Ni, gold, or silver-plated gives an aesthetic appearance,
Neodymium magnets create maximum magnetic induction on a small surface, 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 form) at temperatures up to 230°C and above...
Thanks to flexibility in constructing and the capacity to adapt to complex applications,
Fundamental importance in modern industrial fields – they are used in hard drives, motor assemblies, medical devices, also industrial machines.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in compact constructions

Limitations

Disadvantages of neodymium magnets:

To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
Limited possibility of making threads in the magnet and complex forms - preferred is a housing - magnetic holder.
Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical in case of swallowing.
With large orders the cost of neodymium magnets is a challenge,

Holding force characteristics

Detachment force of the magnet in optimal conditions – what contributes to it?

Magnet power was defined for ideal contact conditions, taking into account:

on a base made of mild steel, perfectly concentrating the magnetic flux
whose thickness reaches at least 10 mm
with an polished touching surface
without the slightest clearance between the magnet and steel
for force applied at a right angle (pull-off, not shear)
at ambient temperature room level

Determinants of practical lifting force of a magnet

Effective lifting capacity is affected by working environment parameters, such as (from priority):

Space between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
Material type – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
Surface structure – the smoother and more polished the surface, the better the adhesion and stronger the hold. Roughness creates an air distance.
Temperature influence – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, in contrast under parallel forces the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

Warnings

Life threat

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Hand protection

Danger of trauma: The pulling power is so immense that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.

Impact on smartphones

Navigation devices and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Nickel allergy

Some people have a sensitization to nickel, which is the standard coating for NdFeB magnets. Extended handling may cause an allergic reaction. We recommend use protective gloves.

Safe distance

Equipment safety: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).

Danger to the youngest

These products are not intended for children. Swallowing multiple magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and requires immediate surgery.

Power loss in heat

Avoid heat. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Flammability

Fire warning: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Shattering risk

Neodymium magnets are sintered ceramics, meaning they are fragile like glass. Impact of two magnets leads to them cracking into small pieces.

Powerful field

Before use, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.

Caution! Need more info? Read our article: Why are neodymium magnets dangerous?

MP 25x5x5 / N38 - ring magnet

Product card - MP 25x5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the magnet - technical parameters

Table 1: Static pull force (pull vs gap) - characteristics MP 25x5x5 / N38

Table 2: Shear load (wall) MP 25x5x5 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MP 25x5x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MP 25x5x5 / N38

Table 5: Working in heat (material behavior) - resistance threshold MP 25x5x5 / N38

Table 6: Two magnets (attraction) - field range MP 25x5x5 / N38

Table 7: Protective zones (electronics) - warnings MP 25x5x5 / N38

Table 8: Impact energy (cracking risk) - collision effects MP 25x5x5 / N38

Table 9: Corrosion resistance MP 25x5x5 / N38

Table 10: Construction data (Flux) MP 25x5x5 / N38

Table 11: Submerged application MP 25x5x5 / N38

1. Sliding resistance

2. Efficiency vs thickness

3. Thermal stability

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

Elemental analysis

Ecology and recycling (GPSR)

Force (pull)

Magnetic Induction

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SM 25x125 [2xM8] / N52 - magnetic separator

Advantages as well as disadvantages of Nd2Fe14B magnets.

Advantages

Limitations

Holding force characteristics

Detachment force of the magnet in optimal conditions – what contributes to it?

Determinants of practical lifting force of a magnet

Warnings

Life threat

Hand protection

Impact on smartphones

Nickel allergy

Safe distance

Danger to the youngest

Power loss in heat

Flammability

Shattering risk

Powerful field

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - characteristics
MP 25x5x5 / N38

Table 2: Shear load (wall)
MP 25x5x5 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 25x5x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MP 25x5x5 / N38

Table 5: Working in heat (material behavior) - resistance threshold
MP 25x5x5 / N38

Table 6: Two magnets (attraction) - field range
MP 25x5x5 / N38

Table 7: Protective zones (electronics) - warnings
MP 25x5x5 / N38

Table 8: Impact energy (cracking risk) - collision effects
MP 25x5x5 / N38

Table 9: Corrosion resistance
MP 25x5x5 / N38

Table 10: Construction data (Flux)
MP 25x5x5 / N38

Table 11: Submerged application
MP 25x5x5 / N38

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.