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MP 25x7x9 / 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 030195

GTIN/EAN: 5906301812128

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

7 mm [±0,1 mm]

Height

9 mm [±0,1 mm]

Weight

30.54 g

Magnetization Direction

↑ axial

Load capacity

14.82 kg / 145.39 N

Magnetic Induction

362.13 mT / 3621 Gs

Coating

[NiCuNi] Nickel

see properties »

12.55 ZŁ with VAT / pcs + price for transport

10.20 ZŁ net + 23% VAT / pcs

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Technical parameters of the product - MP 25x7x9 / N38 - ring magnet

Specification / characteristics - MP 25x7x9 / N38 - ring magnet

properties

properties	values
Cat. no.	030195
GTIN/EAN	5906301812128
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	7 mm [±0,1 mm]
Height	9 mm [±0,1 mm]
Weight	30.54 g
Magnetization Direction	↑ axial
Load capacity ~ ?	14.82 kg / 145.39 N
Magnetic Induction ~ ?	362.13 mT / 3621 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x7x9 / 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 simulation of the product - report

These data are the outcome of a physical analysis. Values are based on models for the material Nd₂Fe₁₄B. Real-world performance may differ from theoretical values. Use these data as a supplementary guide when designing systems.

Table 1: Static force (force vs distance) - interaction chart
MP 25x7x9 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	14.82 kg / 32.67 pounds 14820.0 g / 145.4 N	crushing
1 mm	5310 Gs 531.0 mT	12.52 kg / 27.60 pounds 12519.6 g / 122.8 N	crushing
2 mm	4846 Gs 484.6 mT	10.43 kg / 22.98 pounds 10425.5 g / 102.3 N	crushing
3 mm	4397 Gs 439.7 mT	8.59 kg / 18.93 pounds 8586.1 g / 84.2 N	strong
5 mm	3576 Gs 357.6 mT	5.68 kg / 12.52 pounds 5678.0 g / 55.7 N	strong
10 mm	2073 Gs 207.3 mT	1.91 kg / 4.21 pounds 1907.5 g / 18.7 N	safe
15 mm	1231 Gs 123.1 mT	0.67 kg / 1.48 pounds 673.1 g / 6.6 N	safe
20 mm	773 Gs 77.3 mT	0.27 kg / 0.58 pounds 265.0 g / 2.6 N	safe
30 mm	356 Gs 35.6 mT	0.06 kg / 0.12 pounds 56.2 g / 0.6 N	safe
50 mm	115 Gs 11.5 mT	0.01 kg / 0.01 pounds 5.9 g / 0.1 N	safe

Magnetic force weakens drastically with every mm of distance. Keep in mind that even a microscopic distance (e.g., dirt, varnish, dust) noticeably diminishes the holding power. Magnets operate strongest at the point of direct contact; air break kills the power. Notice how rapidly the load capacity drop, when the magnet does not adhere flatly to the metal substrate. When calculating the mounting, avoid redundant distances.

Table 2: Slippage hold (vertical surface)
MP 25x7x9 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	2.96 kg / 6.53 pounds 2964.0 g / 29.1 N
1 mm	Stal (~0.2)	2.50 kg / 5.52 pounds 2504.0 g / 24.6 N
2 mm	Stal (~0.2)	2.09 kg / 4.60 pounds 2086.0 g / 20.5 N
3 mm	Stal (~0.2)	1.72 kg / 3.79 pounds 1718.0 g / 16.9 N
5 mm	Stal (~0.2)	1.14 kg / 2.50 pounds 1136.0 g / 11.1 N
10 mm	Stal (~0.2)	0.38 kg / 0.84 pounds 382.0 g / 3.7 N
15 mm	Stal (~0.2)	0.13 kg / 0.30 pounds 134.0 g / 1.3 N
20 mm	Stal (~0.2)	0.05 kg / 0.12 pounds 54.0 g / 0.5 N
30 mm	Stal (~0.2)	0.01 kg / 0.03 pounds 12.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N

The following data indicates the approximate force sufficient to initiate the downward movement of the magnet downwards against a upright steel wall (considering typical friction). The holding force is relative to the gap size between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 25x7x9 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	4.45 kg / 9.80 pounds 4446.0 g / 43.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	2.96 kg / 6.53 pounds 2964.0 g / 29.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.48 kg / 3.27 pounds 1482.0 g / 14.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	7.41 kg / 16.34 pounds 7410.0 g / 72.7 N

When mounting a magnet on a vertical surface (e.g., a car body), it you can count on just about 1/5 of nominal attraction strength. Gravity and a weak degree of grip mean that products move down faster than they detach. Designing a wall mount? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a slippery surface, the holder will slip down under a noticeably lighter cargo. Utilizing a rubberized coating can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 25x7x9 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.74 kg / 1.63 pounds 741.0 g / 7.3 N
1 mm	13%	1.85 kg / 4.08 pounds 1852.5 g / 18.2 N
2 mm	25%	3.71 kg / 8.17 pounds 3705.0 g / 36.3 N
3 mm	38%	5.56 kg / 12.25 pounds 5557.5 g / 54.5 N
5 mm	63%	9.26 kg / 20.42 pounds 9262.5 g / 90.9 N
10 mm	100%	14.82 kg / 32.67 pounds 14820.0 g / 145.4 N
11 mm	100%	14.82 kg / 32.67 pounds 14820.0 g / 145.4 N
12 mm	100%	14.82 kg / 32.67 pounds 14820.0 g / 145.4 N

A thin metal plate is incapable of take in the full magnetic flux, which squanders power of the magnet. If you mount a strong magnet to a thin surface, the field will pass right through and the holding will be smaller. To squeeze full efficiency of this neodymium's power, you need a suitably thick backing of metal. The material oversaturation means that on sheet metal structures (e.g., thin profiles), the product works worse. We recommend selecting the steel thickness according to the table below.

Table 5: Working in heat (material behavior) - resistance threshold
MP 25x7x9 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	14.82 kg / 32.67 pounds 14820.0 g / 145.4 N	OK
40 °C	-2.2%	14.49 kg / 31.95 pounds 14494.0 g / 142.2 N	OK
60 °C	-4.4%	14.17 kg / 31.23 pounds 14167.9 g / 139.0 N	OK
80 °C	-6.6%	13.84 kg / 30.52 pounds 13841.9 g / 135.8 N
100 °C	-28.8%	10.55 kg / 23.26 pounds 10551.8 g / 103.5 N

Ordinary NdFeB products lose strength after exceeding the maximum temperature. Avoid high temperatures – high temperature can irreversibly damage this product. With every degree above norm, the neodymium's force temporarily drops. Avoid using this magnet near heat sources higher than its safe range. Ignoring the limit will result in irreversible degradation of magnetic properties.

*Important note: Temperature resistance is determined by both grade, as well as the dimension ratios. Flat magnets (low Pc) risk losing magnetic properties at lower temperatures compared to rod magnets. Warning indicator in the table signals a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MP 25x7x9 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	74.73 kg / 164.76 pounds 6 082 Gs	11.21 kg / 24.71 pounds 11210 g / 110.0 N	N/A
1 mm	68.86 kg / 151.81 pounds 11 091 Gs	10.33 kg / 22.77 pounds 10329 g / 101.3 N	61.97 kg / 136.63 pounds ~0 Gs
2 mm	63.13 kg / 139.18 pounds 10 620 Gs	9.47 kg / 20.88 pounds 9470 g / 92.9 N	56.82 kg / 125.26 pounds ~0 Gs
3 mm	57.70 kg / 127.20 pounds 10 153 Gs	8.65 kg / 19.08 pounds 8654 g / 84.9 N	51.93 kg / 114.48 pounds ~0 Gs
5 mm	47.77 kg / 105.31 pounds 9 238 Gs	7.17 kg / 15.80 pounds 7165 g / 70.3 N	42.99 kg / 94.78 pounds ~0 Gs
10 mm	28.63 kg / 63.12 pounds 7 152 Gs	4.29 kg / 9.47 pounds 4295 g / 42.1 N	25.77 kg / 56.81 pounds ~0 Gs
20 mm	9.62 kg / 21.21 pounds 4 145 Gs	1.44 kg / 3.18 pounds 1443 g / 14.2 N	8.66 kg / 19.09 pounds ~0 Gs
50 mm	0.59 kg / 1.29 pounds 1 024 Gs	0.09 kg / 0.19 pounds 88 g / 0.9 N	0.53 kg / 1.16 pounds ~0 Gs
60 mm	0.28 kg / 0.62 pounds 712 Gs	0.04 kg / 0.09 pounds 43 g / 0.4 N	0.26 kg / 0.56 pounds ~0 Gs
70 mm	0.15 kg / 0.33 pounds 514 Gs	0.02 kg / 0.05 pounds 22 g / 0.2 N	0.13 kg / 0.29 pounds ~0 Gs
80 mm	0.08 kg / 0.18 pounds 383 Gs	0.01 kg / 0.03 pounds 12 g / 0.1 N	0.07 kg / 0.16 pounds ~0 Gs
90 mm	0.05 kg / 0.11 pounds 293 Gs	0.01 kg / 0.02 pounds 7 g / 0.1 N	0.04 kg / 0.10 pounds ~0 Gs
100 mm	0.03 kg / 0.07 pounds 230 Gs	0.00 kg / 0.01 pounds 4 g / 0.0 N	0.03 kg / 0.06 pounds ~0 Gs

Two magnets interact from a much further distance than a magnet and steel setup. Such a system of two magnets generates a stronger field and a further horizon of operation. Designing a powerful holder? Use a pair of magnets instead of a neodymium and a steel. Remember that when bringing together two magnets, the impact force is huge. The repulsion force is slightly lower than the attraction, but still significant.
*Field value in repulsion mode drops to ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
* Figures demonstrate friction force of a pair of same magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - precautionary measures
MP 25x7x9 / 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 real danger to electronics as well as medical implants. These magnets produce a flux that destroys function of digital equipment. Remember: the invisible magnetic field acts through matter and glass. Increased vigilance must be exercised by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, car keys, speakers, and screens. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - warning
MP 25x7x9 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	23.94 km/h (6.65 m/s)	0.68 J
30 mm	38.57 km/h (10.71 m/s)	1.75 J
50 mm	49.69 km/h (13.80 m/s)	2.91 J
100 mm	70.25 km/h (19.52 m/s)	5.82 J

Magnetic elements are prone to chipping – a strong collision with metal can result in shattering. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Impact energy can cause material chips or dangerous crushing to skin. Be sure to control the product during mounting so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear eye protection when playing with powerful specimens.

Table 9: Corrosion resistance
MP 25x7x9 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MP 25x7x9 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	22 495 Mx	225.0 µWb
P_c Coefficient	1.05	High (Stable)

Flux value passing through the pole surface. Key data in coil applications as well as sensors. The P_c coefficient determines the working geometry.

Table 11: Underwater work (magnet fishing)
MP 25x7x9 / N38

Environment	Effective steel pull	Effect
Air (land)	14.82 kg	Standard
Water (riverbed)	16.97 kg (+2.15 kg buoyancy gain)	+14.5%

Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

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

1. Sliding resistance

*Note: On a vertical wall, the magnet retains only approx. 20-30% of its max power.

2. Plate thickness effect

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

3. Heat tolerance

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.05

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

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%

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: 030195-2026

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MP 24x16x2 / N38 - ring magnet

3.69 ZŁ brutto / pcs

The ring-shaped magnet MP 25x7x9 / N38 is created for mechanical fastening, 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 14.82 kg works great as a door latch, speaker holder, or spacer element in devices.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. When tightening the screw, you must maintain great sensitivity. We recommend tightening manually with a screwdriver, not an impact driver, because excessive force will cause the ring to crack. 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.

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.

A screw or bolt with a thread diameter smaller than 7 mm fits this model. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Always check that the screw head is not larger than the outer diameter of the magnet (25 mm), so it doesn't protrude beyond the outline.

The presented product is a ring magnet with dimensions Ø25 mm (outer diameter) and height 9 mm. The key parameter here is the holding force amounting to approximately 14.82 kg (force ~145.39 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 7 mm.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. In the case of connecting two rings, make sure one is turned the right way. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Strengths and weaknesses of neodymium magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:

They do not lose magnetism, even over around ten years – the drop in lifting capacity is only ~1% (according to tests),
They retain their magnetic properties even under strong external field,
By applying a decorative coating of nickel, the element presents an proper look,
They show high magnetic induction at the operating surface, which improves attraction properties,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures reaching 230°C and above...
Possibility of accurate shaping as well as adjusting to individual requirements,
Huge importance in advanced technology sectors – they find application in magnetic memories, motor assemblies, precision medical tools, also multitasking production systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:

They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
Neodymium magnets lose their power 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
When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
Limited possibility of producing nuts in the magnet and complicated forms - recommended is a housing - magnetic holder.
Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these products are able to disrupt the diagnostic process medical when they are in the body.
Due to expensive raw materials, their price exceeds standard values,

Pull force analysis

Maximum holding power of the magnet – what it depends on?

Holding force of 14.82 kg is a measurement result conducted under the following configuration:

with the application of a sheet made of special test steel, ensuring full magnetic saturation
possessing a thickness of min. 10 mm to avoid saturation
with a plane cleaned and smooth
with zero gap (without paint)
for force applied at a right angle (in the magnet axis)
in neutral thermal conditions

Lifting capacity in practice – influencing factors

Please note that the application force will differ influenced by elements below, in order of importance:

Distance (betwixt the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
Direction of force – maximum parameter is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
Steel thickness – too thin sheet causes magnetic saturation, causing part of the power to be wasted to the other side.
Steel type – mild steel gives the best results. Alloy steels lower magnetic permeability and lifting capacity.
Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.

Safe handling of NdFeB magnets

Do not give to children

These products are not toys. Accidental ingestion of a few magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires immediate surgery.

Hand protection

Mind your fingers. Two large magnets will join immediately with a force of massive weight, crushing anything in their path. Be careful!

Power loss in heat

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

Beware of splinters

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets leads to them shattering into shards.

Magnetic interference

Navigation devices and mobile phones are extremely sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Flammability

Mechanical processing of NdFeB material poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Skin irritation risks

Studies show that the nickel plating (the usual finish) is a common allergen. For allergy sufferers, avoid touching magnets with bare hands and opt for coated magnets.

Caution required

Handle with care. Neodymium magnets attract from a distance and snap with massive power, often faster than you can move away.

Cards and drives

Intense magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.

Life threat

Patients with a pacemaker should keep an large gap from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Warning! Looking for details? Read our article: Why are neodymium magnets dangerous?

MP 25x7x9 / N38 - ring magnet

Technical parameters of the product - MP 25x7x9 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the product - report

Table 1: Static force (force vs distance) - interaction chart MP 25x7x9 / N38

Table 2: Slippage hold (vertical surface) MP 25x7x9 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MP 25x7x9 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MP 25x7x9 / N38

Table 5: Working in heat (material behavior) - resistance threshold MP 25x7x9 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision MP 25x7x9 / N38

Table 7: Hazards (electronics) - precautionary measures MP 25x7x9 / N38

Table 8: Impact energy (kinetic energy) - warning MP 25x7x9 / N38

Table 9: Corrosion resistance MP 25x7x9 / N38

Table 10: Electrical data (Flux) MP 25x7x9 / N38

Table 11: Underwater work (magnet fishing) MP 25x7x9 / N38

1. Sliding resistance

2. Plate thickness effect

3. Heat tolerance

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

Chemical composition

Sustainability

Force (pull)

Magnetic Induction

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SM 32x475 [2xM8] / N42 - magnetic separator

MP 24x16x2 / N38 - ring magnet

Strengths and weaknesses of neodymium magnets.

Pros

Disadvantages

Pull force analysis

Maximum holding power of the magnet – what it depends on?

Lifting capacity in practice – influencing factors

Safe handling of NdFeB magnets

Do not give to children

Hand protection

Power loss in heat

Beware of splinters

Magnetic interference

Flammability

Skin irritation risks

Caution required

Cards and drives

Life threat

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - interaction chart
MP 25x7x9 / N38

Table 2: Slippage hold (vertical surface)
MP 25x7x9 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 25x7x9 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 25x7x9 / N38

Table 5: Working in heat (material behavior) - resistance threshold
MP 25x7x9 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision
MP 25x7x9 / N38

Table 7: Hazards (electronics) - precautionary measures
MP 25x7x9 / N38

Table 8: Impact energy (kinetic energy) - warning
MP 25x7x9 / N38

Table 9: Corrosion resistance
MP 25x7x9 / N38

Table 10: Electrical data (Flux)
MP 25x7x9 / N38

Table 11: Underwater work (magnet fishing)
MP 25x7x9 / N38