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MP 25x8x20 / 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 030450

GTIN/EAN: 5906301812340

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

8 mm [±0,1 mm]

Height

20 mm [±0,1 mm]

Weight

66.09 g

Magnetization Direction

↑ axial

Load capacity

19.02 kg / 186.54 N

Magnetic Induction

525.50 mT / 5255 Gs

Coating

[NiCuNi] Nickel

see technical data »

41.71 ZŁ with VAT / pcs + price for transport

33.91 ZŁ net + 23% VAT / pcs

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Detailed specification - MP 25x8x20 / N38 - ring magnet

Specification / characteristics - MP 25x8x20 / N38 - ring magnet

properties

properties	values
Cat. no.	030450
GTIN/EAN	5906301812340
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	20 mm [±0,1 mm]
Weight	66.09 g
Magnetization Direction	↑ axial
Load capacity ~ ?	19.02 kg / 186.54 N
Magnetic Induction ~ ?	525.50 mT / 5255 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x8x20 / 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 magnet - technical parameters

Presented data are the outcome of a mathematical simulation. Results rely on models for the material Nd₂Fe₁₄B. Operational performance may differ from theoretical values. Please consider these data as a supplementary guide for designers.

Table 1: Static force (force vs gap) - characteristics
MP 25x8x20 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N	dangerous!
1 mm	5310 Gs 531.0 mT	16.07 kg / 35.42 pounds 16067.7 g / 157.6 N	dangerous!
2 mm	4846 Gs 484.6 mT	13.38 kg / 29.50 pounds 13380.1 g / 131.3 N	dangerous!
3 mm	4397 Gs 439.7 mT	11.02 kg / 24.29 pounds 11019.3 g / 108.1 N	dangerous!
5 mm	3576 Gs 357.6 mT	7.29 kg / 16.07 pounds 7287.1 g / 71.5 N	medium risk
10 mm	2073 Gs 207.3 mT	2.45 kg / 5.40 pounds 2448.1 g / 24.0 N	medium risk
15 mm	1231 Gs 123.1 mT	0.86 kg / 1.90 pounds 863.8 g / 8.5 N	safe
20 mm	773 Gs 77.3 mT	0.34 kg / 0.75 pounds 340.1 g / 3.3 N	safe
30 mm	356 Gs 35.6 mT	0.07 kg / 0.16 pounds 72.1 g / 0.7 N	safe
50 mm	115 Gs 11.5 mT	0.01 kg / 0.02 pounds 7.5 g / 0.1 N	safe

Pulling power decreases sharply with every subsequent millimeter of gap. Note that even a microscopic distance (e.g., contamination, paint, dust) strongly weakens the grip. Neodymiums work optimally at the point of direct contact; gap nullifies the force. Observe how flashily the load capacity drop, when the magnet does not touch flatly to the metal substrate. When planning the mounting, eliminate unnecessary gaps.

Table 2: Sliding capacity (vertical surface)
MP 25x8x20 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	3.80 kg / 8.39 pounds 3804.0 g / 37.3 N
1 mm	Stal (~0.2)	3.21 kg / 7.09 pounds 3214.0 g / 31.5 N
2 mm	Stal (~0.2)	2.68 kg / 5.90 pounds 2676.0 g / 26.3 N
3 mm	Stal (~0.2)	2.20 kg / 4.86 pounds 2204.0 g / 21.6 N
5 mm	Stal (~0.2)	1.46 kg / 3.21 pounds 1458.0 g / 14.3 N
10 mm	Stal (~0.2)	0.49 kg / 1.08 pounds 490.0 g / 4.8 N
15 mm	Stal (~0.2)	0.17 kg / 0.38 pounds 172.0 g / 1.7 N
20 mm	Stal (~0.2)	0.07 kg / 0.15 pounds 68.0 g / 0.7 N
30 mm	Stal (~0.2)	0.01 kg / 0.03 pounds 14.0 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 theoretical holding capacity necessary to start the downward movement of the magnet down along a vertical steel wall (considering standard friction coefficient). The holding force is relative to the distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MP 25x8x20 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	5.71 kg / 12.58 pounds 5706.0 g / 56.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	3.80 kg / 8.39 pounds 3804.0 g / 37.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.90 kg / 4.19 pounds 1902.0 g / 18.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	9.51 kg / 20.97 pounds 9510.0 g / 93.3 N

When mounting a magnet on a upright surface (e.g., a fridge), it you can count on barely approx. 20%-30% of its maximum pull force. Gravity and a weak degree of grip influence the fact that magnets move down faster than they pop off the substrate. Planning a hanger? Consider that the sliding force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the holder will slide down under a significantly smaller weight. Utilizing a rubberized pad can significantly increase the grip.

Table 4: Steel thickness (saturation) - power losses
MP 25x8x20 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.95 kg / 2.10 pounds 951.0 g / 9.3 N
1 mm	13%	2.38 kg / 5.24 pounds 2377.5 g / 23.3 N
2 mm	25%	4.76 kg / 10.48 pounds 4755.0 g / 46.6 N
3 mm	38%	7.13 kg / 15.72 pounds 7132.5 g / 70.0 N
5 mm	63%	11.89 kg / 26.21 pounds 11887.5 g / 116.6 N
10 mm	100%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N
11 mm	100%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N
12 mm	100%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N

A thin sheet is incapable of conduct the entire magnetic field, which wastes potential of the magnet. If you install a neodymium to a thin surface, the field will pass right through and the attraction force will be weaker. To utilize the maximum of this neodymium's potential, you require a sufficiently solid backing of steel. The saturation phenomenon causes that on delicate walls (e.g., car bodies), the holder works worse. We suggest choosing the steel dimension according to the table below.

Table 5: Working in heat (stability) - power drop
MP 25x8x20 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N	OK
40 °C	-2.2%	18.60 kg / 41.01 pounds 18601.6 g / 182.5 N	OK
60 °C	-4.4%	18.18 kg / 40.09 pounds 18183.1 g / 178.4 N	OK
80 °C	-6.6%	17.76 kg / 39.16 pounds 17764.7 g / 174.3 N
100 °C	-28.8%	13.54 kg / 29.86 pounds 13542.2 g / 132.8 N

Standard neodymium magnets irreversibly lose parameters past the thermal threshold. Avoid high temperatures – high temperature can permanently damage this magnet. As the temperature rises, the neodymium's force temporarily lowers. Refrain from using this product in hot environments exceeding its working range. Ignoring the limit will lead to permanent loss of magnetic properties.

*Technical advisory: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low permeance coefficient) may lose charge permanently at lower temperatures compared to rod magnets. Warning indicator in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 25x8x20 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	30.91 kg / 68.14 pounds 6 082 Gs	4.64 kg / 10.22 pounds 4636 g / 45.5 N	N/A
1 mm	28.48 kg / 62.79 pounds 11 091 Gs	4.27 kg / 9.42 pounds 4272 g / 41.9 N	25.63 kg / 56.51 pounds ~0 Gs
2 mm	26.11 kg / 57.57 pounds 10 620 Gs	3.92 kg / 8.63 pounds 3917 g / 38.4 N	23.50 kg / 51.81 pounds ~0 Gs
3 mm	23.86 kg / 52.61 pounds 10 153 Gs	3.58 kg / 7.89 pounds 3580 g / 35.1 N	21.48 kg / 47.35 pounds ~0 Gs
5 mm	19.76 kg / 43.56 pounds 9 238 Gs	2.96 kg / 6.53 pounds 2964 g / 29.1 N	17.78 kg / 39.20 pounds ~0 Gs
10 mm	11.84 kg / 26.11 pounds 7 152 Gs	1.78 kg / 3.92 pounds 1776 g / 17.4 N	10.66 kg / 23.50 pounds ~0 Gs
20 mm	3.98 kg / 8.77 pounds 4 145 Gs	0.60 kg / 1.32 pounds 597 g / 5.9 N	3.58 kg / 7.89 pounds ~0 Gs
50 mm	0.24 kg / 0.54 pounds 1 024 Gs	0.04 kg / 0.08 pounds 36 g / 0.4 N	0.22 kg / 0.48 pounds ~0 Gs
60 mm	0.12 kg / 0.26 pounds 712 Gs	0.02 kg / 0.04 pounds 18 g / 0.2 N	0.11 kg / 0.23 pounds ~0 Gs
70 mm	0.06 kg / 0.13 pounds 514 Gs	0.01 kg / 0.02 pounds 9 g / 0.1 N	0.06 kg / 0.12 pounds ~0 Gs
80 mm	0.03 kg / 0.07 pounds 383 Gs	0.01 kg / 0.01 pounds 5 g / 0.1 N	0.03 kg / 0.07 pounds ~0 Gs
90 mm	0.02 kg / 0.04 pounds 293 Gs	0.00 kg / 0.01 pounds 3 g / 0.0 N	0.02 kg / 0.04 pounds ~0 Gs
100 mm	0.01 kg / 0.03 pounds 230 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.02 pounds ~0 Gs

Two magnetic products attract each other from a significantly greater distance than a magnet and steel setup. Such a system of two magnets creates a more powerful interaction and a larger range of operation. Planning to create a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Exercise caution that when attracting two neodymiums, the impact force is extreme. The repulsion force is marginally weaker than the connection force, but still large.
*The magnetic induction in repulsion mode reaches ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
Important: Results refer to shear force of two same magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - warnings
MP 25x8x20 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	17.0 cm
Hearing aid	10 Gs (1.0 mT)	13.5 cm
Timepiece	20 Gs (2.0 mT)	10.5 cm
Mobile device	40 Gs (4.0 mT)	8.0 cm
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 is a large risk to electronics and medical implants. These neodymiums generate a field that prevents correct functioning of sensitive medical devices. Be aware: the invisible magnetic field passes through tissues and plastic. Increased vigilance must be exercised by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, remotes, speakers, and screens. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - warning
MP 25x8x20 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	18.43 km/h (5.12 m/s)	0.87 J
30 mm	29.70 km/h (8.25 m/s)	2.25 J
50 mm	38.27 km/h (10.63 m/s)	3.73 J
100 mm	54.10 km/h (15.03 m/s)	7.46 J

NdFeB products are very brittle – a collision with steel can result in shattering. Control the attraction moment – a magnet released freely turns into a projectile. Impact energy can cause material chips or dangerous crushing to fingers. Always hold the magnet during bringing near metal so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear safety glasses when playing with powerful specimens.

Table 9: Surface protection spec
MP 25x8x20 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MP 25x8x20 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	10 108 Mx	101.1 µWb
P_c Coefficient	1.25	High (Stable)

Total magnetic flux emitted by the pole surface. Key data when building generators and motors. P_c value defines the working geometry.

Table 11: Hydrostatics and buoyancy
MP 25x8x20 / N38

Environment	Effective steel pull	Effect
Air (land)	19.02 kg	Standard
Water (riverbed)	21.78 kg (+2.76 kg buoyancy gain)	+14.5%

Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

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

1. Wall mount (shear)

*Warning: On a vertical wall, the magnet holds only ~20% of its nominal pull.

2. Steel thickness impact

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

3. Temperature resistance

*For N38 material, 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) = 1.25

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

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: 030450-2026

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The ring magnet with a hole MP 25x8x20 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This is a crucial issue when working with model MP 25x8x20 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. 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. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. 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. 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.

This model is characterized by dimensions Ø25x20 mm and a weight of 66.09 g. The key parameter here is the holding force amounting to approximately 19.02 kg (force ~186.54 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 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.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Strengths

Besides their durability, neodymium magnets are valued for these benefits:

They retain magnetic properties for around ten years – the loss is just ~1% (in theory),
Magnets effectively protect themselves against loss of magnetization caused by ambient magnetic noise,
The use of an elegant layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
They show high magnetic induction at the operating surface, which increases their power,
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...
Due to the option of precise molding and adaptation to unique needs, magnetic components can be modeled in a broad palette of shapes and sizes, which increases their versatility,
Wide application in modern industrial fields – they are utilized in data components, motor assemblies, diagnostic systems, and complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which allows their use in compact constructions

Cons

What to avoid - cons of neodymium magnets: application proposals

They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
Limited ability of making nuts in the magnet and complex forms - recommended is a housing - mounting mechanism.
Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Furthermore, tiny parts of these magnets can complicate diagnosis medical after entering the body.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

Breakaway force was defined for ideal contact conditions, including:

with the contact of a sheet made of special test steel, ensuring maximum field concentration
whose thickness equals approx. 10 mm
characterized by lack of roughness
under conditions of gap-free contact (surface-to-surface)
for force acting at a right angle (in the magnet axis)
at conditions approx. 20°C

Practical aspects of lifting capacity – factors

Bear in mind that the application force will differ subject to elements below, in order of importance:

Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Direction of force – highest force is available only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
Base massiveness – too thin plate does not close the flux, causing part of the flux to be lost to the other side.
Metal type – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
Thermal factor – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity was measured using a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet and the plate decreases the holding force.

Safe handling of neodymium magnets

Magnet fragility

Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Data carriers

Data protection: Strong magnets can damage data carriers and delicate electronics (heart implants, medical aids, timepieces).

Bone fractures

Watch your fingers. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!

Allergy Warning

Certain individuals experience a contact allergy to nickel, which is the standard coating for NdFeB magnets. Prolonged contact can result in skin redness. It is best to wear safety gloves.

Conscious usage

Handle magnets with awareness. Their powerful strength can shock even experienced users. Plan your moves and respect their force.

Phone sensors

Navigation devices and smartphones are extremely susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

This is not a toy

Neodymium magnets are not toys. Eating several magnets can lead to them pinching intestinal walls, which poses a critical condition and requires immediate surgery.

Dust is flammable

Fire hazard: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.

Maximum temperature

Watch the temperature. Exposing the magnet to high heat will destroy its properties and strength.

Health Danger

Life threat: Neodymium magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Important! Need more info? Read our article: Are neodymium magnets dangerous?

MP 25x8x20 / N38 - ring magnet

Detailed specification - MP 25x8x20 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the magnet - technical parameters

Table 1: Static force (force vs gap) - characteristics MP 25x8x20 / N38

Table 2: Sliding capacity (vertical surface) MP 25x8x20 / N38

Table 3: Vertical assembly (shearing) - vertical pull MP 25x8x20 / N38

Table 4: Steel thickness (saturation) - power losses MP 25x8x20 / N38

Table 5: Working in heat (stability) - power drop MP 25x8x20 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range MP 25x8x20 / N38

Table 7: Protective zones (implants) - warnings MP 25x8x20 / N38

Table 8: Collisions (cracking risk) - warning MP 25x8x20 / N38

Table 9: Surface protection spec MP 25x8x20 / N38

Table 10: Electrical data (Flux) MP 25x8x20 / N38

Table 11: Hydrostatics and buoyancy MP 25x8x20 / N38

1. Wall mount (shear)

2. Steel thickness impact

3. Temperature resistance

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

Elemental analysis

Ecology and recycling (GPSR)

Force (pull)

Magnetic Field

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MPL 40x20x5 / N38 - lamellar magnet

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

Cons

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

Practical aspects of lifting capacity – factors

Safe handling of neodymium magnets

Magnet fragility

Data carriers

Bone fractures

Allergy Warning

Conscious usage

Phone sensors

This is not a toy

Dust is flammable

Maximum temperature

Health Danger

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - characteristics
MP 25x8x20 / N38

Table 2: Sliding capacity (vertical surface)
MP 25x8x20 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MP 25x8x20 / N38

Table 4: Steel thickness (saturation) - power losses
MP 25x8x20 / N38

Table 5: Working in heat (stability) - power drop
MP 25x8x20 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 25x8x20 / N38

Table 7: Protective zones (implants) - warnings
MP 25x8x20 / N38

Table 8: Collisions (cracking risk) - warning
MP 25x8x20 / N38

Table 9: Surface protection spec
MP 25x8x20 / N38

Table 10: Electrical data (Flux)
MP 25x8x20 / N38

Table 11: Hydrostatics and buoyancy
MP 25x8x20 / N38

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.