Product available Ships tomorrow

MP 25x5x5 / 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 030193

GTIN/EAN: 5906301812104

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

17.67 g

Magnetization Direction

↑ axial

Load capacity

7.66 kg / 75.12 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

see specifications »

6.00 ZŁ with VAT / pcs + price for transport

4.88 ZŁ net + 23% VAT / pcs

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Detailed specification - MP 25x5x5 / N38 - ring magnet

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

properties

properties	values
Cat. no.	030193
GTIN/EAN	5906301812104
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
Diameter	25 mm [±0,1 mm]
internal diameter Ø	5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	17.67 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.66 kg / 75.12 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x5x5 / N38 - ring magnet

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

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Technical analysis of the product - technical parameters

These data represent the outcome of a engineering simulation. Results were calculated on models for the material Nd₂Fe₁₄B. Operational performance might slightly differ. Treat these calculations as a preliminary roadmap for designers.

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

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

Magnetic force drops sharply with every mm of distance. Remember that even a microscopic distance (e.g., dirt, paint, dust) significantly weakens the grip. Magnetic products work most effectively during direct contact; distance nullifies the power. Notice how quickly the parameters plummet, when the magnet does not touch tightly to the steel surface. When calculating the assembly, avoid unnecessary gaps.

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

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.53 kg / 3.38 LBS 1532.0 g / 15.0 N
1 mm	Stal (~0.2)	1.29 kg / 2.85 LBS 1294.0 g / 12.7 N
2 mm	Stal (~0.2)	1.08 kg / 2.38 LBS 1078.0 g / 10.6 N
3 mm	Stal (~0.2)	0.89 kg / 1.96 LBS 888.0 g / 8.7 N
5 mm	Stal (~0.2)	0.59 kg / 1.29 LBS 586.0 g / 5.7 N
10 mm	Stal (~0.2)	0.20 kg / 0.44 LBS 198.0 g / 1.9 N
15 mm	Stal (~0.2)	0.07 kg / 0.15 LBS 70.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 LBS 28.0 g / 0.3 N
30 mm	Stal (~0.2)	0.01 kg / 0.01 LBS 6.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

The following data indicates the estimated force sufficient to start the downward movement of the magnet vertically on a vertical metal surface (considering standard friction coefficient). This value is relative to the gap size between the magnet and the surface.

Table 3: Wall mounting (sliding) - vertical pull
MP 25x5x5 / N38

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

When mounting a element on a vertical surface (e.g., a board), it will only hold only about 1/5 of its nominal power. Gravity and a weak degree of grip influence the fact that holders slide down easier than they detach. Designing a vertical fastening? Consider that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the magnet will give way down under a noticeably lighter cargo. Application of an anti-slip coating can drastically raise the stability.

Table 4: Steel thickness (saturation) - power losses
MP 25x5x5 / N38

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

A thin sheet is unable to focus the entire magnetic field, which weakens actual performance of the holder. If you attach a powerful product to a weak sheet, the flux will penetrate right through and the attraction force will be weaker. To utilize the maximum of this neodymium's potential, you need a suitably thick backing of steel. The material oversaturation means that on delicate walls (e.g., appliance housings), the magnet shows lower pull force. We recommend selecting the steel dimension based on the following data.

Table 5: Thermal stability (material behavior) - thermal limit
MP 25x5x5 / N38

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

Ordinary NdFeB products lose parameters above the temperature limit. Protect against heat – excessive heat can permanently damage this product. As the temperature rises, the neodymium's force momentarily lowers. Do not use this product in hot environments higher than its safe range. Exceeding the critical threshold will cause irreversible degradation of magnetism.

*Engineering note: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures than long magnets. The danger warning in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - field collision
MP 25x5x5 / 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 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 magnetic products attract each other from a much further distance than a magnet and sheet setup. Such a system of magnet-to-magnet creates a more powerful interaction and a wider radius of performance. Designing a solid fastener? Utilize two neodymiums instead of a neodymium and a steel. Exercise caution that when attracting two neodymiums, the collision energy is extreme. The levitation is a bit weaker than the connection force, but still significant.
*The magnetic induction between like poles reaches ~0 Gs at the geometric center of the gap (resulting from vector opposition).
* Figures show sliding force of dual identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - precautionary measures
MP 25x5x5 / N38

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

Extremely neodym field poses a large risk to IT equipment and pacemakers. These NdFeB products produce a flux that prevents correct functioning of sensitive medical devices. Notice: the invisible magnetic field acts through matter and housings. Increased vigilance must be exercised by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, car keys, speakers, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

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

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

Neodymium magnets are very brittle – a strong collision with metal causes immediate chipping. Watch the impact speed – a magnet released freely speeds with massive force. Striking energy can cause material chips or dangerous crushing to skin. Hold the magnet firmly during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Use safety goggles when handling with large magnets.

Table 9: Coating parameters (durability)
MP 25x5x5 / N38

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

Neodymium magnets are highly susceptible to corrosion without proper protection. Improper coating selection is the most common cause of magnet failure over time.

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

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

Flux value emitted by the pole surface. Essential parameter for generator designers and motors. The P_c coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 25x5x5 / N38

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

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

Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.

1. Vertical hold

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

2. Plate thickness effect

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

3. Thermal stability

*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

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 and environmental data

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: 030193-2026

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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. It is also often used in advertising for fixing signs and in workshops for organizing tools.

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. The flat screw head should evenly press the magnet. 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. This product is dedicated for indoor use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

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 Ø25x5 mm and a weight of 17.67 g. The pulling force of this model is an impressive 7.66 kg, which translates to 75.12 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 5 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 rare earth magnets.

Advantages

Besides their remarkable field intensity, neodymium magnets offer the following advantages:

They retain full power for around ten years – the loss is just ~1% (in theory),
Magnets effectively protect themselves against demagnetization caused by ambient magnetic noise,
Thanks to the metallic finish, the layer of Ni-Cu-Ni, gold, or silver-plated gives an aesthetic appearance,
Magnetic induction on the working layer of the magnet is maximum,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
Thanks to the potential of precise molding and adaptation to specialized projects, magnetic components can be manufactured in a variety of geometric configurations, which expands the range of possible applications,
Versatile presence in modern technologies – they are utilized in HDD drives, electric motors, precision medical tools, and multitasking production systems.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in miniature devices

Limitations

Problematic aspects of neodymium magnets: weaknesses and usage proposals

To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
Due to limitations in producing threads and complex forms in magnets, we recommend using cover - magnetic mount.
Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small elements of these products can complicate diagnosis medical in case of swallowing.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Best holding force of the magnet in ideal parameters – what it depends on?

The lifting capacity listed is a result of laboratory testing performed under specific, ideal conditions:

with the use of a yoke made of low-carbon steel, ensuring full magnetic saturation
possessing a thickness of at least 10 mm to avoid saturation
with a plane free of scratches
under conditions of no distance (metal-to-metal)
for force applied at a right angle (in the magnet axis)
at standard ambient temperature

Determinants of practical lifting force of a magnet

In practice, the actual lifting capacity depends on many variables, presented from crucial:

Air gap (betwixt the magnet and the metal), since even a tiny distance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
Plate thickness – too thin sheet does not close the flux, causing part of the flux to be lost into the air.
Steel grade – the best choice is pure iron steel. Stainless steels may generate lower lifting capacity.
Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Warnings

Heat sensitivity

Control the heat. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Implant safety

Individuals with a ICD should keep an absolute distance from magnets. The magnetism can interfere with the functioning of the implant.

Skin irritation risks

Some people experience a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Prolonged contact can result in skin redness. We strongly advise use safety gloves.

Handling rules

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

Shattering risk

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Machining danger

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

Danger to the youngest

Strictly keep magnets away from children. Ingestion danger is high, and the effects of magnets clamping inside the body are life-threatening.

Protect data

Very strong magnetic fields can erase data on payment cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.

Hand protection

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Compass and GPS

Note: rare earth magnets produce a field that interferes with sensitive sensors. Maintain a safe distance from your mobile, tablet, and GPS.

Security! Want to know more? Read our article: Why are neodymium magnets dangerous?

MP 25x5x5 / N38 - ring magnet

Detailed specification - MP 25x5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the product - technical parameters

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

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

Table 3: Wall mounting (sliding) - vertical pull MP 25x5x5 / N38

Table 4: Steel thickness (saturation) - power losses MP 25x5x5 / N38

Table 5: Thermal stability (material behavior) - thermal limit MP 25x5x5 / N38

Table 6: Two magnets (repulsion) - field collision MP 25x5x5 / N38

Table 7: Hazards (electronics) - precautionary measures MP 25x5x5 / N38

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

Table 9: Coating parameters (durability) MP 25x5x5 / N38

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

Table 11: Underwater work (magnet fishing) MP 25x5x5 / N38

1. Vertical hold

2. Plate thickness effect

3. Thermal stability

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

Material specification

Environmental data

Force (pull)

Magnetic Field

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Strengths as well as weaknesses of rare earth magnets.

Advantages

Limitations

Lifting parameters

Best holding force of the magnet in ideal parameters – what it depends on?

Determinants of practical lifting force of a magnet

Warnings

Heat sensitivity

Implant safety

Skin irritation risks

Handling rules

Shattering risk

Machining danger

Danger to the youngest

Protect data

Hand protection

Compass and GPS

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

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

Table 3: Wall mounting (sliding) - vertical pull
MP 25x5x5 / N38

Table 4: Steel thickness (saturation) - power losses
MP 25x5x5 / N38

Table 5: Thermal stability (material behavior) - thermal limit
MP 25x5x5 / N38

Table 6: Two magnets (repulsion) - field collision
MP 25x5x5 / N38

Table 7: Hazards (electronics) - precautionary measures
MP 25x5x5 / N38

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

Table 9: Coating parameters (durability)
MP 25x5x5 / N38

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

Table 11: Underwater work (magnet fishing)
MP 25x5x5 / N38