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MP 25x12.5x5 / 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 030342

GTIN/EAN: 5906301812289

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

12.5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

13.81 g

Magnetization Direction

↑ axial

Load capacity

5.98 kg / 58.67 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

view parameters »

6.20 ZŁ with VAT / pcs + price for transport

5.04 ZŁ net + 23% VAT / pcs

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Physical properties - MP 25x12.5x5 / N38 - ring magnet

Specification / characteristics - MP 25x12.5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030342
GTIN/EAN	5906301812289
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
Diameter	25 mm [±0,1 mm]
internal diameter Ø	12.5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	13.81 g
Magnetization Direction	↑ axial
Load capacity ~ ?	5.98 kg / 58.67 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x12.5x5 / N38 - ring magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	312 - 380	°C
Curie Temperature TF	593 - 716	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Technical simulation of the magnet - report

These information constitute the outcome of a engineering simulation. Values are based on models for the class Nd₂Fe₁₄B. Operational conditions may deviate from the simulation results. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static force (force vs gap) - characteristics
MP 25x12.5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N	medium risk
1 mm	5310 Gs 531.0 mT	5.05 kg / 11.14 LBS 5051.8 g / 49.6 N	medium risk
2 mm	4846 Gs 484.6 mT	4.21 kg / 9.27 LBS 4206.8 g / 41.3 N	medium risk
3 mm	4397 Gs 439.7 mT	3.46 kg / 7.64 LBS 3464.5 g / 34.0 N	medium risk
5 mm	3576 Gs 357.6 mT	2.29 kg / 5.05 LBS 2291.1 g / 22.5 N	medium risk
10 mm	2073 Gs 207.3 mT	0.77 kg / 1.70 LBS 769.7 g / 7.6 N	safe
15 mm	1231 Gs 123.1 mT	0.27 kg / 0.60 LBS 271.6 g / 2.7 N	safe
20 mm	773 Gs 77.3 mT	0.11 kg / 0.24 LBS 106.9 g / 1.0 N	safe
30 mm	356 Gs 35.6 mT	0.02 kg / 0.05 LBS 22.7 g / 0.2 N	safe
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 LBS 2.4 g / 0.0 N	safe

Magnetic force drops sharply per each millimeter of spacing. Keep in mind that even the smallest gap (e.g., dirt, paint, veneer) strongly weakens the grip. Magnetic products hold most effectively at the point of direct contact; air break kills the force. Notice how flashily the pull force fall, when the magnet does not touch flatly to the metal substrate. When designing the mounting, avoid unnecessary gaps.

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

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.20 kg / 2.64 LBS 1196.0 g / 11.7 N
1 mm	Stal (~0.2)	1.01 kg / 2.23 LBS 1010.0 g / 9.9 N
2 mm	Stal (~0.2)	0.84 kg / 1.86 LBS 842.0 g / 8.3 N
3 mm	Stal (~0.2)	0.69 kg / 1.53 LBS 692.0 g / 6.8 N
5 mm	Stal (~0.2)	0.46 kg / 1.01 LBS 458.0 g / 4.5 N
10 mm	Stal (~0.2)	0.15 kg / 0.34 LBS 154.0 g / 1.5 N
15 mm	Stal (~0.2)	0.05 kg / 0.12 LBS 54.0 g / 0.5 N
20 mm	Stal (~0.2)	0.02 kg / 0.05 LBS 22.0 g / 0.2 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 LBS 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

This section shows the theoretical weight limit sufficient to cause the shifting of the magnet downwards on a vertical steel wall (assuming typical friction coefficient). The holding force is relative to the air gap between the magnet and the surface.

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

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.79 kg / 3.96 LBS 1794.0 g / 17.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.20 kg / 2.64 LBS 1196.0 g / 11.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.60 kg / 1.32 LBS 598.0 g / 5.9 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.99 kg / 6.59 LBS 2990.0 g / 29.3 N

When mounting a element on a upright wall (e.g., a board), it you can count on barely about 20%-30% of its maximum pull force. Gravitational force and a weak degree of grip mean that holders slip easier than they pop off the substrate. Planning a wall mount? Consider that the shear force is significantly lower than the perpendicular breakaway force. On a painted metal, the holder will give way down under a noticeably lighter weight. Using a rubber layer can effectively increase the grip.

Table 4: Material efficiency (substrate influence) - power losses
MP 25x12.5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.60 kg / 1.32 LBS 598.0 g / 5.9 N
1 mm	25%	1.50 kg / 3.30 LBS 1495.0 g / 14.7 N
2 mm	50%	2.99 kg / 6.59 LBS 2990.0 g / 29.3 N
3 mm	75%	4.49 kg / 9.89 LBS 4485.0 g / 44.0 N
5 mm	100%	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N
10 mm	100%	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N
11 mm	100%	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N
12 mm	100%	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N

A thin metal plate is incapable of absorb the full magnetic flux, which weakens actual performance of the holder. If you mount a strong magnet to a weak sheet, the field will pass right through and the attraction force will be weaker. To utilize the maximum of this neodymium's potential, you need a suitably thick element of steel. The material oversaturation means that on delicate walls (e.g., car bodies), the magnet shows lower pull force. We advise picking the steel dimension from these parameters.

Table 5: Working in heat (stability) - resistance threshold
MP 25x12.5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	5.98 kg / 13.18 LBS 5980.0 g / 58.7 N	OK
40 °C	-2.2%	5.85 kg / 12.89 LBS 5848.4 g / 57.4 N	OK
60 °C	-4.4%	5.72 kg / 12.60 LBS 5716.9 g / 56.1 N	OK
80 °C	-6.6%	5.59 kg / 12.31 LBS 5585.3 g / 54.8 N
100 °C	-28.8%	4.26 kg / 9.39 LBS 4257.8 g / 41.8 N

Ordinary NdFeB products change their properties strength after exceeding the maximum temperature. Watch out for overheating – heat can irreversibly destroy this product. As the temperature rises, the neodymium's force temporarily lowers. Refrain from using this product close to ovens higher than its operating temperature limit. Too high temperature will lead to destruction of magnetism.

*Technical advisory: Temperature resistance is determined by both grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress compared to rod magnets. Red status in the table indicates permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - field collision
MP 25x12.5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (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 attract each other from a significantly greater distance than a neodymium and metal combination. Such a system of magnet-to-magnet produces a massive flux and a larger range of performance. Planning to create a powerful holder? Utilize two neodymiums instead of a neodymium and a steel. Be careful that when connecting a pair of magnets, the collision energy is huge. The repulsion force is slightly lower than the connection force, but still large.
*Field value in repulsion mode is approximately ~0 Gs at the geometric center of the gap (due to field cancellation).
Note: Results demonstrate sliding force of dual matching magnets (friction coefficient ~0.15 for Ni-Ni coating).

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

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	17.0 cm
Hearing aid	10 Gs (1.0 mT)	13.5 cm
Mechanical watch	20 Gs (2.0 mT)	10.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	8.0 cm
Car key	50 Gs (5.0 mT)	7.5 cm
Payment card	400 Gs (40.0 mT)	3.0 cm
HDD hard drive	600 Gs (60.0 mT)	2.5 cm

Powerful magnet radiation is a large risk to IT equipment as well as medical implants. These neodymiums produce a flux that destroys function of digital equipment. Remember: the invisible magnetic field acts through matter and plastic. Increased vigilance must be exercised by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

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

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.61 km/h (6.28 m/s)	0.27 J
30 mm	36.44 km/h (10.12 m/s)	0.71 J
50 mm	46.94 km/h (13.04 m/s)	1.17 J
100 mm	66.37 km/h (18.43 m/s)	2.35 J

Magnetic elements are very brittle – a collision with steel causes immediate chipping. Watch the impact speed – a neodymium left loose becomes dangerous. Striking energy can destroy the magnet or dangerous crushing to skin. Always hold the magnet during bringing near metal so it doesn't slam with momentum against the metal. A collision at high speed means shattering of the magnet. Wear safety glasses when working with powerful specimens.

Table 9: Coating parameters (durability)
MP 25x12.5x5 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

The following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

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

Parameter	Value	SI Unit / Description
Magnetic Flux	24 536 Mx	245.4 µWb
P_c Coefficient	1.03	High (Stable)

Total magnetic flux passing through the magnet pole. Key data when building generators as well as sensors. The P_c coefficient determines the magnet's operating point.

Table 11: Submerged application
MP 25x12.5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	5.98 kg	Standard
Water (riverbed)	6.85 kg (+0.87 kg buoyancy gain)	+14.5%

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

In water, the magnet feels stronger thanks to Archimedes' principle. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

*Note: On a vertical surface, the magnet retains just a fraction of its nominal pull.

2. Steel saturation

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

3. Temperature resistance

*For N38 grade, 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) = 1.03

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

Material specification

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: 030342-2026

Quick Unit Converter

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Force in kg

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The ring magnet with a hole MP 25x12.5x5 / 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 5.98 kg works great as a door latch, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 25x12.5x5 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. When tightening the screw, you must maintain great sensitivity. We recommend tightening manually with a screwdriver, not an impact driver, because too much pressure will cause the ring to crack. 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. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 12.5 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.

It is a magnetic ring with a diameter of 25 mm and thickness 5 mm. The key parameter here is the holding force amounting to approximately 5.98 kg (force ~58.67 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 12.5 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.

Pros as well as cons of neodymium magnets.

Benefits

Besides their magnetic performance, neodymium magnets are valued for these benefits:

They have unchanged lifting capacity, and over more than ten years their performance decreases symbolically – ~1% (in testing),
They are noted for resistance to demagnetization induced by external field influence,
By using a decorative layer of gold, the element gains an elegant look,
The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
Possibility of individual modeling and adapting to atypical requirements,
Universal use in future technologies – they find application in hard drives, drive modules, precision medical tools, and complex engineering applications.
Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Limitations

Disadvantages of neodymium magnets:

They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
We recommend cover - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complicated forms.
Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can disrupt the diagnostic process medical in case of swallowing.
Due to complex production process, their price is relatively high,

Lifting parameters

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

Magnet power was determined for optimal configuration, assuming:

with the application of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
whose transverse dimension equals approx. 10 mm
with a plane cleaned and smooth
under conditions of no distance (metal-to-metal)
during detachment in a direction perpendicular to the plane
in stable room temperature

Lifting capacity in real conditions – factors

Effective lifting capacity impacted by specific conditions, mainly (from most important):

Clearance – existence of foreign body (rust, tape, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
Steel grade – ideal substrate is pure iron steel. Cast iron may attract less.
Base smoothness – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the holding force is lower. In addition, even a slight gap between the magnet and the plate lowers the lifting capacity.

Safe handling of neodymium magnets

Magnetic media

Very strong magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Stay away of at least 10 cm.

Keep away from electronics

A strong magnetic field interferes with the operation of compasses in phones and GPS navigation. Maintain magnets close to a device to prevent damaging the sensors.

Warning for allergy sufferers

A percentage of the population experience a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Frequent touching can result in skin redness. We strongly advise use protective gloves.

Powerful field

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

ICD Warning

Patients with a ICD have to keep an safe separation from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Permanent damage

Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. Damage is permanent.

No play value

Strictly keep magnets away from children. Choking hazard is high, and the consequences of magnets connecting inside the body are tragic.

Fire risk

Powder produced during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Bodily injuries

Big blocks can smash fingers instantly. Never place your hand betwixt two attracting surfaces.

Eye protection

Neodymium magnets are sintered ceramics, which means they are very brittle. Impact of two magnets will cause them shattering into small pieces.

Security! Looking for details? Check our post: Are neodymium magnets dangerous?

MP 25x12.5x5 / N38 - ring magnet

Physical properties - MP 25x12.5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical simulation of the magnet - report

Table 1: Static force (force vs gap) - characteristics MP 25x12.5x5 / N38

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

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

Table 4: Material efficiency (substrate influence) - power losses MP 25x12.5x5 / N38

Table 5: Working in heat (stability) - resistance threshold MP 25x12.5x5 / N38

Table 6: Two magnets (repulsion) - field collision MP 25x12.5x5 / N38

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

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

Table 9: Coating parameters (durability) MP 25x12.5x5 / N38

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

Table 11: Submerged application MP 25x12.5x5 / N38

1. Sliding resistance

2. Steel saturation

3. Temperature resistance

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

Material specification

Environmental data

Magnet pull force

Magnetic Induction

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Pros as well as cons of neodymium magnets.

Benefits

Limitations

Lifting parameters

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

Lifting capacity in real conditions – factors

Safe handling of neodymium magnets

Magnetic media

Keep away from electronics

Warning for allergy sufferers

Powerful field

ICD Warning

Permanent damage

No play value

Fire risk

Bodily injuries

Eye protection

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - characteristics
MP 25x12.5x5 / N38

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

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

Table 4: Material efficiency (substrate influence) - power losses
MP 25x12.5x5 / N38

Table 5: Working in heat (stability) - resistance threshold
MP 25x12.5x5 / N38

Table 6: Two magnets (repulsion) - field collision
MP 25x12.5x5 / N38

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

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

Table 9: Coating parameters (durability)
MP 25x12.5x5 / N38

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

Table 11: Submerged application
MP 25x12.5x5 / N38