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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

technical parameters »

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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 simulation of the product - technical parameters

The following data represent the result of a mathematical calculation. Results rely on algorithms for the material Nd₂Fe₁₄B. Real-world conditions may differ. Treat these data as a supplementary guide for designers.

Table 1: Static pull force (force 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	safe
15 mm	1231 Gs 123.1 mT	0.33 kg / 0.72 pounds 325.2 g / 3.2 N	safe
20 mm	773 Gs 77.3 mT	0.13 kg / 0.28 pounds 128.0 g / 1.3 N	safe
30 mm	356 Gs 35.6 mT	0.03 kg / 0.06 pounds 27.2 g / 0.3 N	safe
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 pounds 2.8 g / 0.0 N	safe

Pulling power weakens significantly per each millimeter of distance. Keep in mind that even a very thin break (e.g., contamination, varnish, dust) noticeably weakens the grip. Neodymiums work optimally in perfect adhesion; distance weakens the force. Observe how quickly the parameters fall, when the magnet does not touch directly to the steel surface. When designing the mounting, avoid redundant distances.

Table 2: Shear load (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

The following data indicates the approximate shear load sufficient to start the shifting of the magnet vertically against a vertical steel wall (considering standard friction). This parameter is relative to the gap size between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
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 holder on a vertical wall (e.g., a fridge), it will only hold only about 1/5 of nominal attraction strength. Gravity and a weak degree of grip mean that magnets slide down faster than they pop off the substrate. Want to create a vertical fastening? Note that the shear force is noticeably lower than the perpendicular breakaway force. On a painted metal, the holder will slide down under a much lighter weight. Using a rubber coating can drastically improve the result.

Table 4: Material efficiency (saturation) - 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 cannot conduct the full magnetic flux, which squanders power of the holder. Should you attach a powerful product to a weak sheet, the flux will pass right through and the attraction force will be weaker. To utilize the maximum of this neodymium's power, you need a suitably thick backing of steel. The saturation effect means that on sheet metal structures (e.g., thin profiles), the product holds weaker. We advise picking the steel thickness from these parameters.

Table 5: Working in heat (material behavior) - power drop
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 above the temperature limit. Avoid high temperatures – heat can permanently demagnetize this product. As the temperature rises, the magnet's capacity temporarily decreases. Do not use this product near heat sources higher than its safe range. Too high temperature will lead to irreversible degradation of magnetic properties.

*Engineering note: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) are more susceptible to demagnetization at lower temperatures than taller cylinders. Warning indicator in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (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 magnets interact from a wider radius than a neodymium and metal combination. Such a system of two magnets produces a massive flux and a further horizon of action. Designing a strong closure? Apply two magnets instead of a neodymium and a steel. Remember that when attracting two neodymiums, the impact force is massive. The repulsion force is slightly lower than the connection force, but still significant.
*Flux density between like poles is approximately ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
Important: Calculations apply to shear force of two matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - warnings
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
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

A strong magnetic field poses a large risk to IT equipment as well as medical implants. These NdFeB products produce a flux that prevents correct functioning of sensitive medical devices. Notice: the invisible magnetic field penetrates the body and plastic. Special caution must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (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 delicate – a collision with steel causes immediate chipping. Control the attraction moment – a magnet released freely becomes dangerous. Striking energy can cause material chips or dangerous crushing to skin. Hold the magnet firmly during mounting 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 neodymium. Wear eye protection when playing with large magnets.

Table 9: Surface protection spec
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)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (P_c)
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 magnet pole. Essential parameter in coil applications as well as sensors. The P_c coefficient determines the working geometry.

Table 11: Submerged application
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%

Rust risk: 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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Note: On a vertical wall, the magnet retains merely approx. 20-30% of its perpendicular strength.

2. Steel saturation

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

3. Power loss vs temp

*For N38 material, 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

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.

Engineering data and GPSR

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%

Environmental data

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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It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Mounting is clean and reversible, unlike gluing. This product with a force of 7.16 kg works great as a door latch, 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 flexible washer under the screw head, which will cushion the stresses. 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. 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 16.52 g. The key parameter here is the lifting capacity amounting to approximately 7.16 kg (force ~70.21 N). 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.

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.

Benefits

Apart from their strong magnetism, neodymium magnets have these key benefits:

They virtually do not lose power, because even after 10 years the performance loss is only ~1% (based on calculations),
Neodymium magnets remain remarkably resistant to magnetic field loss caused by external interference,
A magnet with a shiny silver surface has an effective appearance,
Neodymium magnets create maximum magnetic induction on a small surface, which allows for strong attraction,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures reaching 230°C and above...
In view of the ability of flexible shaping and adaptation to individualized needs, neodymium magnets can be manufactured in a variety of shapes and sizes, which makes them more universal,
Key role in modern technologies – they find application in magnetic memories, electric motors, medical equipment, and complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in compact constructions

Cons

Disadvantages of neodymium magnets:

They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
When exposed to high temperature, neodymium magnets suffer 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
They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
Limited ability of creating threads in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
Potential hazard 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 magnets can be problematic in diagnostics medical in case of swallowing.
With mass production the cost of neodymium magnets is a challenge,

Pull force analysis

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

Breakaway force was determined for the most favorable conditions, taking into account:

with the application of a sheet made of special test steel, ensuring maximum field concentration
with a thickness of at least 10 mm
with a surface free of scratches
under conditions of gap-free contact (surface-to-surface)
during detachment in a direction vertical to the mounting surface
in stable room temperature

What influences lifting capacity in practice

It is worth knowing that the magnet holding will differ influenced by the following factors, starting with the most relevant:

Space between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
Steel thickness – insufficiently thick plate does not close the flux, causing part of the flux to be escaped to the other side.
Metal type – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
Plate texture – ground elements ensure maximum contact, which improves force. Rough surfaces weaken the grip.
Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity was determined by applying a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Warnings

Fire risk

Fire hazard: Rare earth powder is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Electronic hazard

Do not bring magnets near a purse, computer, or TV. The magnetic field can permanently damage these devices and erase data from cards.

Warning for allergy sufferers

Some people have a hypersensitivity to nickel, which is the standard coating for neodymium magnets. Prolonged contact may cause a rash. We strongly advise use protective gloves.

Bodily injuries

Large magnets can crush fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.

Conscious usage

Be careful. Neodymium magnets attract from a distance and snap with huge force, often quicker than you can react.

Health Danger

Warning for patients: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.

Material brittleness

Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Danger to the youngest

Always keep magnets away from children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are tragic.

Impact on smartphones

Note: neodymium magnets produce a field that confuses precision electronics. Maintain a separation from your mobile, tablet, and GPS.

Power loss in heat

Do not overheat. Neodymium magnets are sensitive to temperature. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Attention! Learn more 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 simulation of the product - technical parameters

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

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

Table 3: Wall mounting (sliding) - behavior on slippery surfaces MP 25x8x5 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MP 25x8x5 / N38

Table 5: Working in heat (material behavior) - power drop MP 25x8x5 / N38

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

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

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

Table 9: Surface protection spec MP 25x8x5 / N38

Table 10: Construction data (Pc) MP 25x8x5 / N38

Table 11: Submerged application MP 25x8x5 / N38

1. Shear force

2. Steel saturation

3. Power loss vs temp

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

Chemical composition

Environmental data

Pulling force

Field Strength

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MW 8x1.5 / N38 - cylindrical magnet

Strengths as well as weaknesses of Nd2Fe14B magnets.

Benefits

Cons

Pull force analysis

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

What influences lifting capacity in practice

Warnings

Fire risk

Electronic hazard

Warning for allergy sufferers

Bodily injuries

Conscious usage

Health Danger

Material brittleness

Danger to the youngest

Impact on smartphones

Power loss in heat

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

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

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 25x8x5 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MP 25x8x5 / N38

Table 5: Working in heat (material behavior) - power drop
MP 25x8x5 / N38

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

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

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

Table 9: Surface protection spec
MP 25x8x5 / N38

Table 10: Construction data (P_c)
MP 25x8x5 / N38

Table 11: Submerged application
MP 25x8x5 / N38

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.