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MP 20x8x5 / 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 030188

GTIN/EAN: 5906301812050

5.00

Diameter

20 mm [±0,1 mm]

internal diameter Ø

8 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

9.9 g

Magnetization Direction

↑ axial

Load capacity

5.82 kg / 57.06 N

Magnetic Induction

277.16 mT / 2772 Gs

Coating

[NiCuNi] Nickel

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Strength along with shape of a neodymium magnet can be verified on our online calculation tool.

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Technical of the product - MP 20x8x5 / N38 - ring magnet

Specification / characteristics - MP 20x8x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030188
GTIN/EAN	5906301812050
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	20 mm [±0,1 mm]
internal diameter Ø	8 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	9.9 g
Magnetization Direction	↑ axial
Load capacity ~ ?	5.82 kg / 57.06 N
Magnetic Induction ~ ?	277.16 mT / 2772 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 20x8x5 / N38 - ring magnet

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

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Physical modeling of the product - report

The following values are the direct effect of a physical calculation. Values were calculated on algorithms for the material Nd₂Fe₁₄B. Real-world conditions might slightly differ. Use these data as a reference point during assembly planning.

Table 1: Static force (force vs gap) - characteristics
MP 20x8x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5917 Gs 591.7 mT	5.82 kg / 12.83 lbs 5820.0 g / 57.1 N	strong
1 mm	5321 Gs 532.1 mT	4.71 kg / 10.38 lbs 4707.4 g / 46.2 N	strong
2 mm	4736 Gs 473.6 mT	3.73 kg / 8.22 lbs 3729.5 g / 36.6 N	strong
3 mm	4184 Gs 418.4 mT	2.91 kg / 6.42 lbs 2910.0 g / 28.5 N	strong
5 mm	3216 Gs 321.6 mT	1.72 kg / 3.79 lbs 1719.3 g / 16.9 N	low risk
10 mm	1650 Gs 165.0 mT	0.45 kg / 1.00 lbs 452.4 g / 4.4 N	low risk
15 mm	907 Gs 90.7 mT	0.14 kg / 0.30 lbs 136.8 g / 1.3 N	low risk
20 mm	544 Gs 54.4 mT	0.05 kg / 0.11 lbs 49.2 g / 0.5 N	low risk
30 mm	240 Gs 24.0 mT	0.01 kg / 0.02 lbs 9.6 g / 0.1 N	low risk
50 mm	75 Gs 7.5 mT	0.00 kg / 0.00 lbs 0.9 g / 0.0 N	low risk

Grip strength drops drastically with every mm of distance. Remember that every additional insulation layer (e.g., contamination, paint, dust) significantly weakens the grip. Neodymiums work strongest at the point of direct contact; gap drastically cuts the force. Analyze how flashily the parameters fall, when the magnet does not touch directly to the steel surface. When calculating the mounting, avoid additional spacers.

Table 2: Slippage hold (vertical surface)
MP 20x8x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.16 kg / 2.57 lbs 1164.0 g / 11.4 N
1 mm	Stal (~0.2)	0.94 kg / 2.08 lbs 942.0 g / 9.2 N
2 mm	Stal (~0.2)	0.75 kg / 1.64 lbs 746.0 g / 7.3 N
3 mm	Stal (~0.2)	0.58 kg / 1.28 lbs 582.0 g / 5.7 N
5 mm	Stal (~0.2)	0.34 kg / 0.76 lbs 344.0 g / 3.4 N
10 mm	Stal (~0.2)	0.09 kg / 0.20 lbs 90.0 g / 0.9 N
15 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 28.0 g / 0.3 N
20 mm	Stal (~0.2)	0.01 kg / 0.02 lbs 10.0 g / 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 2.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

This section defines the estimated weight limit necessary to initiate the downward movement of the magnet vertically on a vertical steel wall (considering standard friction coefficient). This value is relative to the air gap between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MP 20x8x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.75 kg / 3.85 lbs 1746.0 g / 17.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.16 kg / 2.57 lbs 1164.0 g / 11.4 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.58 kg / 1.28 lbs 582.0 g / 5.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.91 kg / 6.42 lbs 2910.0 g / 28.5 N

When mounting a magnet on a vertical surface (e.g., a board), it will maintain barely approx. 1/5 of its nominal power. Gravity as well as a weak degree of grip cause that magnets slip faster than they pull off. Want to create a wall mount? Consider that the shear force is much weaker than the perpendicular breakaway force. On a painted metal, the holder will slide down under a significantly smaller cargo. Using a rubber coating can effectively improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MP 20x8x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.58 kg / 1.28 lbs 582.0 g / 5.7 N
1 mm	25%	1.46 kg / 3.21 lbs 1455.0 g / 14.3 N
2 mm	50%	2.91 kg / 6.42 lbs 2910.0 g / 28.5 N
3 mm	75%	4.37 kg / 9.62 lbs 4365.0 g / 42.8 N
5 mm	100%	5.82 kg / 12.83 lbs 5820.0 g / 57.1 N
10 mm	100%	5.82 kg / 12.83 lbs 5820.0 g / 57.1 N
11 mm	100%	5.82 kg / 12.83 lbs 5820.0 g / 57.1 N
12 mm	100%	5.82 kg / 12.83 lbs 5820.0 g / 57.1 N

A thin metal plate is unable to absorb the entire magnetic field, which squanders power of the holder. Should you install a neodymium to a thin surface, the field will pass right through and the holding will be smaller. To squeeze the maximum of this magnet's potential, you need a suitably thick piece of metal. The material oversaturation causes that on sheet metal structures (e.g., car bodies), the holder shows lower pull force. We recommend selecting the steel cross-section from these parameters.

Table 5: Thermal stability (material behavior) - thermal limit
MP 20x8x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	5.82 kg / 12.83 lbs 5820.0 g / 57.1 N	OK
40 °C	-2.2%	5.69 kg / 12.55 lbs 5692.0 g / 55.8 N	OK
60 °C	-4.4%	5.56 kg / 12.27 lbs 5563.9 g / 54.6 N	OK
80 °C	-6.6%	5.44 kg / 11.98 lbs 5435.9 g / 53.3 N
100 °C	-28.8%	4.14 kg / 9.14 lbs 4143.8 g / 40.7 N

Classic neodymiums irreversibly lose power above the temperature limit. Protect against heat – heat can irreversibly damage this product. With increasing heat, the magnet's force briefly drops. Refrain from using this magnet in hot environments higher than its operating temperature limit. Exceeding the critical threshold will result in destruction of magnetic properties.

*Technical advisory: Thermal stability is determined by both grade, as well as the dimension ratios. Low-profile magnets (low Pc) may lose charge permanently at lower temperatures than taller cylinders. Red status in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MP 20x8x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	54.03 kg / 119.11 lbs 6 121 Gs	8.10 kg / 17.87 lbs 8104 g / 79.5 N	N/A
1 mm	48.76 kg / 107.50 lbs 11 242 Gs	7.31 kg / 16.13 lbs 7314 g / 71.8 N	43.89 kg / 96.75 lbs ~0 Gs
2 mm	43.70 kg / 96.34 lbs 10 642 Gs	6.55 kg / 14.45 lbs 6555 g / 64.3 N	39.33 kg / 86.71 lbs ~0 Gs
3 mm	38.98 kg / 85.94 lbs 10 051 Gs	5.85 kg / 12.89 lbs 5847 g / 57.4 N	35.08 kg / 77.34 lbs ~0 Gs
5 mm	30.63 kg / 67.54 lbs 8 910 Gs	4.60 kg / 10.13 lbs 4595 g / 45.1 N	27.57 kg / 60.78 lbs ~0 Gs
10 mm	15.96 kg / 35.19 lbs 6 432 Gs	2.39 kg / 5.28 lbs 2394 g / 23.5 N	14.36 kg / 31.67 lbs ~0 Gs
20 mm	4.20 kg / 9.26 lbs 3 299 Gs	0.63 kg / 1.39 lbs 630 g / 6.2 N	3.78 kg / 8.33 lbs ~0 Gs
50 mm	0.19 kg / 0.42 lbs 702 Gs	0.03 kg / 0.06 lbs 29 g / 0.3 N	0.17 kg / 0.38 lbs ~0 Gs
60 mm	0.09 kg / 0.20 lbs 480 Gs	0.01 kg / 0.03 lbs 13 g / 0.1 N	0.08 kg / 0.18 lbs ~0 Gs
70 mm	0.05 kg / 0.10 lbs 342 Gs	0.01 kg / 0.01 lbs 7 g / 0.1 N	0.04 kg / 0.09 lbs ~0 Gs
80 mm	0.02 kg / 0.05 lbs 253 Gs	0.00 kg / 0.01 lbs 4 g / 0.0 N	0.02 kg / 0.05 lbs ~0 Gs
90 mm	0.01 kg / 0.03 lbs 193 Gs	0.00 kg / 0.00 lbs 2 g / 0.0 N	0.01 kg / 0.03 lbs ~0 Gs
100 mm	0.01 kg / 0.02 lbs 150 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two strong neodymiums interact from a significantly greater distance than a magnet and steel combination. Such a system of two magnets creates a more powerful interaction and a larger range of operation. Designing a strong closure? Apply two magnets instead of one magnet and a striker plate. Remember that when connecting a pair of magnets, the pinch force is massive. The levitation is a bit weaker than the connection force, but still significant.
*Field value between like poles reaches ~0 Gs at the geometric center of the gap (resulting from vector opposition).
Note: Calculations refer to friction force of dual identical magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - warnings
MP 20x8x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	14.5 cm
Hearing aid	10 Gs (1.0 mT)	11.5 cm
Mechanical watch	20 Gs (2.0 mT)	9.0 cm
Mobile device	40 Gs (4.0 mT)	6.5 cm
Car key	50 Gs (5.0 mT)	6.0 cm
Payment card	400 Gs (40.0 mT)	2.5 cm
HDD hard drive	600 Gs (60.0 mT)	2.0 cm

Extremely neodym field poses a large risk to electronic devices and medical implants. These neodymiums produce a field that prevents correct functioning of sensitive medical devices. Remember: the invisible magnetic field acts through matter and glass. Special caution must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - collision effects
MP 20x8x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	25.61 km/h (7.11 m/s)	0.25 J
30 mm	42.40 km/h (11.78 m/s)	0.69 J
50 mm	54.68 km/h (15.19 m/s)	1.14 J
100 mm	77.33 km/h (21.48 m/s)	2.28 J

Magnetic elements are very brittle – a violent impact against metal can result in shattering. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Kinetic force can trigger coating fragments or dangerous crushing to fingers. Hold the magnet firmly during bringing near metal so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h means shattering of the magnet. Wear safety glasses when handling with powerful specimens.

Table 9: Anti-corrosion coating durability
MP 20x8x5 / 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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Flux)
MP 20x8x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	16 116 Mx	161.2 µWb
P_c Coefficient	1.13	High (Stable)

Flux value passing through the magnet pole. Key data for generator designers and motors. P_c value determines the magnet's operating point.

Table 11: Physics of underwater searching
MP 20x8x5 / N38

Environment	Effective steel pull	Effect
Air (land)	5.82 kg	Standard
Water (riverbed)	6.66 kg (+0.84 kg buoyancy gain)	+14.5%

Rust risk: 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. Shear force

*Caution: On a vertical surface, the magnet holds just ~20% of its nominal pull.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Temperature resistance

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.13

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%

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: 030188-2026

Magnet Unit Converter

Pulling force

Force in lbs

Magnetic Field

Gauss (Gs)

Induction (T)

Insert data in one of the inputs, and the rest convert on the fly.

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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. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. 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 caution. 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. 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. Aesthetic mounting requires selecting the appropriate head size.

It is a magnetic ring with a diameter of 20 mm and thickness 5 mm. The pulling force of this model is an impressive 5.82 kg, which translates to 57.06 N in newtons. 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. 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 and cons of neodymium magnets.

Advantages

In addition to their pulling strength, neodymium magnets provide the following advantages:

Their strength is durable, and after around ten years it drops only by ~1% (according to research),
They are noted for resistance to demagnetization induced by external disturbances,
Thanks to the glossy finish, the layer of nickel, gold, or silver gives an visually attractive appearance,
Magnets exhibit extremely high magnetic induction on the active area,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to versatility in designing and the capacity to customize to specific needs,
Fundamental importance in modern industrial fields – they find application in HDD drives, motor assemblies, medical devices, also modern systems.
Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of neodymium magnets:

At strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
Due to limitations in realizing threads and complicated forms in magnets, we propose using casing - magnetic holder.
Possible danger to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child safety. Additionally, tiny parts of these devices can be problematic in diagnostics medical in case of swallowing.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

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

The specified lifting capacity refers to the limit force, recorded under optimal environment, specifically:

with the use of a yoke made of low-carbon steel, ensuring maximum field concentration
with a thickness minimum 10 mm
with an ideally smooth touching surface
with zero gap (no impurities)
during pulling in a direction perpendicular to the mounting surface
at conditions approx. 20°C

Practical aspects of lifting capacity – factors

During everyday use, the actual lifting capacity results from a number of factors, listed from the most important:

Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
Steel grade – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
Base smoothness – the more even the surface, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was measured with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the holding force is lower. Moreover, even a slight gap between the magnet and the plate decreases the holding force.

Warnings

Do not give to children

Absolutely store magnets away from children. Ingestion danger is high, and the effects of magnets connecting inside the body are life-threatening.

Skin irritation risks

Some people have a contact allergy to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching might lead to dermatitis. We suggest use protective gloves.

Thermal limits

Monitor thermal conditions. Exposing the magnet to high heat will ruin its magnetic structure and pulling force.

Medical implants

For implant holders: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Cards and drives

Very strong magnetic fields can destroy records on payment cards, hard drives, and storage devices. Stay away of min. 10 cm.

Magnetic interference

A powerful magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Keep magnets close to a device to prevent damaging the sensors.

Fragile material

Neodymium magnets are ceramic materials, which means they are prone to chipping. Collision of two magnets will cause them shattering into small pieces.

Immense force

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Fire warning

Combustion risk: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Serious injuries

Big blocks can break fingers in a fraction of a second. Never put your hand betwixt two strong magnets.

Warning! Details about hazards in the article: Safety of working with magnets.

MP 20x8x5 / N38 - ring magnet

Technical of the product - MP 20x8x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the product - report

Table 1: Static force (force vs gap) - characteristics MP 20x8x5 / N38

Table 2: Slippage hold (vertical surface) MP 20x8x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull MP 20x8x5 / N38

Table 4: Steel thickness (substrate influence) - power losses MP 20x8x5 / N38

Table 5: Thermal stability (material behavior) - thermal limit MP 20x8x5 / N38

Table 6: Two magnets (attraction) - forces in the system MP 20x8x5 / N38

Table 7: Safety (HSE) (electronics) - warnings MP 20x8x5 / N38

Table 8: Impact energy (cracking risk) - collision effects MP 20x8x5 / N38

Table 9: Anti-corrosion coating durability MP 20x8x5 / N38

Table 10: Construction data (Flux) MP 20x8x5 / N38

Table 11: Physics of underwater searching MP 20x8x5 / N38

1. Shear force

2. Steel saturation

3. Temperature resistance

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

Material specification

Sustainability

Pulling force

Magnetic Field

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MW 45x35 / N38 - cylindrical magnet

Pros and cons of neodymium magnets.

Advantages

Weaknesses

Pull force analysis

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

Practical aspects of lifting capacity – factors

Warnings

Do not give to children

Skin irritation risks

Thermal limits

Medical implants

Cards and drives

Magnetic interference

Fragile material

Immense force

Fire warning

Serious injuries

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - characteristics
MP 20x8x5 / N38

Table 2: Slippage hold (vertical surface)
MP 20x8x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MP 20x8x5 / N38

Table 4: Steel thickness (substrate influence) - power losses
MP 20x8x5 / N38

Table 5: Thermal stability (material behavior) - thermal limit
MP 20x8x5 / N38

Table 6: Two magnets (attraction) - forces in the system
MP 20x8x5 / N38

Table 7: Safety (HSE) (electronics) - warnings
MP 20x8x5 / N38

Table 8: Impact energy (cracking risk) - collision effects
MP 20x8x5 / N38

Table 9: Anti-corrosion coating durability
MP 20x8x5 / N38

Table 10: Construction data (Flux)
MP 20x8x5 / N38

Table 11: Physics of underwater searching
MP 20x8x5 / N38