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MP 20x8/4x5 / 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 030333

GTIN/EAN: 5906301812272

5.00

Diameter

20 mm [±0,1 mm]

internal diameter Ø

8/4 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

11.31 g

Magnetization Direction

↑ axial

Load capacity

6.65 kg / 65.21 N

Magnetic Induction

277.16 mT / 2772 Gs

Coating

[NiCuNi] Nickel

view parameters »

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Technical specification of the product - MP 20x8/4x5 / N38 - ring magnet

Specification / characteristics - MP 20x8/4x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030333
GTIN/EAN	5906301812272
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	8/4 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	11.31 g
Magnetization Direction	↑ axial
Load capacity ~ ?	6.65 kg / 65.21 N
Magnetic Induction ~ ?	277.16 mT / 2772 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 20x8/4x5 / 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 - technical parameters

Presented values represent the result of a engineering simulation. Results were calculated on algorithms for the material Nd₂Fe₁₄B. Operational conditions might slightly differ from theoretical values. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs distance) - power drop
MP 20x8/4x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2424 Gs 242.4 mT	6.65 kg / 14.66 lbs 6650.0 g / 65.2 N	medium risk
1 mm	2265 Gs 226.5 mT	5.81 kg / 12.80 lbs 5807.9 g / 57.0 N	medium risk
2 mm	2070 Gs 207.0 mT	4.85 kg / 10.69 lbs 4851.0 g / 47.6 N	medium risk
3 mm	1858 Gs 185.8 mT	3.91 kg / 8.61 lbs 3906.5 g / 38.3 N	medium risk
5 mm	1437 Gs 143.7 mT	2.34 kg / 5.16 lbs 2338.7 g / 22.9 N	medium risk
10 mm	691 Gs 69.1 mT	0.54 kg / 1.19 lbs 540.5 g / 5.3 N	weak grip
15 mm	343 Gs 34.3 mT	0.13 kg / 0.29 lbs 133.3 g / 1.3 N	weak grip
20 mm	186 Gs 18.6 mT	0.04 kg / 0.09 lbs 39.3 g / 0.4 N	weak grip
30 mm	70 Gs 7.0 mT	0.01 kg / 0.01 lbs 5.5 g / 0.1 N	weak grip
50 mm	18 Gs 1.8 mT	0.00 kg / 0.00 lbs 0.4 g / 0.0 N	weak grip

Grip strength drops sharply with every mm of distance. Note that even a microscopic distance (e.g., dirt, paint, rust) strongly reduces the pull force. Magnetic products work strongest in perfect adhesion; air break nullifies the power. See how flashily the parameters plummet, when the product does not touch tightly to the steel surface. When planning the mounting, avoid redundant distances.

Table 2: Shear load (wall)
MP 20x8/4x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.33 kg / 2.93 lbs 1330.0 g / 13.0 N
1 mm	Stal (~0.2)	1.16 kg / 2.56 lbs 1162.0 g / 11.4 N
2 mm	Stal (~0.2)	0.97 kg / 2.14 lbs 970.0 g / 9.5 N
3 mm	Stal (~0.2)	0.78 kg / 1.72 lbs 782.0 g / 7.7 N
5 mm	Stal (~0.2)	0.47 kg / 1.03 lbs 468.0 g / 4.6 N
10 mm	Stal (~0.2)	0.11 kg / 0.24 lbs 108.0 g / 1.1 N
15 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 26.0 g / 0.3 N
20 mm	Stal (~0.2)	0.01 kg / 0.02 lbs 8.0 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

The table below calculates the theoretical force required to initiate the shifting of the magnet downwards on a upright metal surface (assuming standard friction). The holding force depends on the air gap between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 20x8/4x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.00 kg / 4.40 lbs 1995.0 g / 19.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.33 kg / 2.93 lbs 1330.0 g / 13.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.67 kg / 1.47 lbs 665.0 g / 6.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.33 kg / 7.33 lbs 3325.0 g / 32.6 N

When placing a element on a upright plane (e.g., a car body), it you can count on just approx. 1/5 of its nominal power. Gravitational force and a weak degree of grip influence the fact that holders slide down easier than they pull off. Designing a wall mount? Remember that the sliding force is much weaker than the perpendicular breakaway force. On a painted metal, the magnet will slip down under a noticeably lighter cargo. Application of an anti-slip layer can significantly increase the grip.

Table 4: Steel thickness (saturation) - power losses
MP 20x8/4x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.67 kg / 1.47 lbs 665.0 g / 6.5 N
1 mm	25%	1.66 kg / 3.67 lbs 1662.5 g / 16.3 N
2 mm	50%	3.33 kg / 7.33 lbs 3325.0 g / 32.6 N
3 mm	75%	4.99 kg / 11.00 lbs 4987.5 g / 48.9 N
5 mm	100%	6.65 kg / 14.66 lbs 6650.0 g / 65.2 N
10 mm	100%	6.65 kg / 14.66 lbs 6650.0 g / 65.2 N
11 mm	100%	6.65 kg / 14.66 lbs 6650.0 g / 65.2 N
12 mm	100%	6.65 kg / 14.66 lbs 6650.0 g / 65.2 N

A too thin steel is incapable of take in the full magnetic flux, which weakens actual performance of the magnet. If you attach a powerful product to a too thin substrate, the flux will pass right through and the holding will be smaller. To achieve full efficiency of this neodymium's potential, you require a sufficiently solid piece of steel. The material oversaturation means that on sheet metal structures (e.g., thin profiles), the holder shows lower pull force. We recommend selecting the steel thickness based on the following data.

Table 5: Thermal resistance (material behavior) - power drop
MP 20x8/4x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	6.65 kg / 14.66 lbs 6650.0 g / 65.2 N	OK
40 °C	-2.2%	6.50 kg / 14.34 lbs 6503.7 g / 63.8 N	OK
60 °C	-4.4%	6.36 kg / 14.02 lbs 6357.4 g / 62.4 N
80 °C	-6.6%	6.21 kg / 13.69 lbs 6211.1 g / 60.9 N
100 °C	-28.8%	4.73 kg / 10.44 lbs 4734.8 g / 46.4 N

Standard neodymium magnets irreversibly lose parameters after exceeding the maximum temperature. Avoid high temperatures – heat can permanently destroy this magnet. As the temperature rises, the neodymium's capacity briefly decreases. Do not use this magnet in hot environments higher than its working range. Exceeding the critical threshold will result in irreversible degradation of magnetic properties.

*Important note: Thermal stability depends not only on the material grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) risk losing magnetic properties under lower heat stress than long magnets. The danger warning in the table points to permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field range
MP 20x8/4x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	9.28 kg / 20.47 lbs 4 012 Gs	1.39 kg / 3.07 lbs 1393 g / 13.7 N	N/A
1 mm	8.73 kg / 19.25 lbs 4 701 Gs	1.31 kg / 2.89 lbs 1310 g / 12.8 N	7.86 kg / 17.33 lbs ~0 Gs
2 mm	8.11 kg / 17.88 lbs 4 530 Gs	1.22 kg / 2.68 lbs 1216 g / 11.9 N	7.30 kg / 16.09 lbs ~0 Gs
3 mm	7.45 kg / 16.42 lbs 4 342 Gs	1.12 kg / 2.46 lbs 1117 g / 11.0 N	6.70 kg / 14.78 lbs ~0 Gs
5 mm	6.10 kg / 13.45 lbs 3 930 Gs	0.92 kg / 2.02 lbs 915 g / 9.0 N	5.49 kg / 12.11 lbs ~0 Gs
10 mm	3.27 kg / 7.20 lbs 2 875 Gs	0.49 kg / 1.08 lbs 490 g / 4.8 N	2.94 kg / 6.48 lbs ~0 Gs
20 mm	0.75 kg / 1.66 lbs 1 382 Gs	0.11 kg / 0.25 lbs 113 g / 1.1 N	0.68 kg / 1.50 lbs ~0 Gs
50 mm	0.02 kg / 0.04 lbs 220 Gs	0.00 kg / 0.01 lbs 3 g / 0.0 N	0.02 kg / 0.04 lbs ~0 Gs
60 mm	0.01 kg / 0.02 lbs 139 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
70 mm	0.00 kg / 0.01 lbs 93 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
80 mm	0.00 kg / 0.00 lbs 65 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
90 mm	0.00 kg / 0.00 lbs 47 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
100 mm	0.00 kg / 0.00 lbs 35 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnets interact from a much further distance than a magnet and sheet combination. The connection of magnet-to-magnet produces a massive flux and a further horizon of operation. Want to build a solid fastener? Utilize two neodymiums instead of a neodymium and a striker plate. Exercise caution that when bringing together two magnets, the collision energy is huge. The levitation is marginally weaker than the connection force, but still impressive.
*Flux density for N-N configuration is approximately ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
Important: Estimates apply to friction force of dual matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - warnings
MP 20x8/4x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	8.0 cm
Hearing aid	10 Gs (1.0 mT)	6.5 cm
Mechanical watch	20 Gs (2.0 mT)	5.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	4.0 cm
Remote	50 Gs (5.0 mT)	3.5 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field poses a serious hazard to electronics and medical implants. These magnets produce a field that disrupts operation of digital equipment. Notice: the unseen radiation passes through tissues and housings. Special caution must be exercised by people with cochlear implants and insulin pumps. Influence will be felt by: mechanical watches, car keys, membranes, and screens. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MP 20x8/4x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	25.67 km/h (7.13 m/s)	0.29 J
30 mm	42.38 km/h (11.77 m/s)	0.78 J
50 mm	54.68 km/h (15.19 m/s)	1.30 J
100 mm	77.33 km/h (21.48 m/s)	2.61 J

Magnetic elements are delicate – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Striking energy can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during bringing near metal so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear safety glasses when handling with powerful specimens.

Table 9: Corrosion resistance
MP 20x8/4x5 / N38

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

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MP 20x8/4x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	7 218 Mx	72.2 µWb
P_c Coefficient	0.31	Low (Flat)

Total magnetic flux emitted by the magnet pole. Essential parameter for generator designers and motors. P_c value defines the working geometry.

Table 11: Submerged application
MP 20x8/4x5 / N38

Environment	Effective steel pull	Effect
Air (land)	6.65 kg	Standard
Water (riverbed)	7.61 kg (+0.96 kg buoyancy gain)	+14.5%

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

The magnetic field penetrates through water without any losses. Buoyancy helps in lifting finds.

1. Vertical hold

*Note: On a vertical wall, the magnet retains merely a fraction of its max power.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.

3. Heat tolerance

*For N38 material, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.31

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.

Technical specification and ecology

Chemical composition

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

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: 030333-2026

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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. 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 is a crucial issue when working with model MP 20x8/4x5 / 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. 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 can be damaged 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 8/4 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. Aesthetic mounting requires selecting the appropriate head size.

The presented product is a ring magnet with dimensions Ø20 mm (outer diameter) and height 5 mm. The pulling force of this model is an impressive 6.65 kg, which translates to 65.21 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 8/4 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). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Pros as well as cons of neodymium magnets.

Strengths

Besides their tremendous magnetic power, neodymium magnets offer the following advantages:

Their power is maintained, and after around 10 years it decreases only by ~1% (according to research),
Magnets effectively resist against loss of magnetization caused by foreign field sources,
By applying a lustrous layer of silver, the element gains an aesthetic look,
The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
Possibility of detailed forming as well as modifying to complex needs,
Fundamental importance in advanced technology sectors – they are utilized in computer drives, electric motors, precision medical tools, and multitasking production systems.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in miniature devices

Disadvantages

Disadvantages of neodymium magnets:

At strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
NdFeB magnets demagnetize 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 extremely resistant to heat
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
We suggest cover - magnetic mount, due to difficulties in creating threads inside the magnet and complex shapes.
Possible danger to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
Due to complex production process, their price is relatively high,

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

The load parameter shown concerns the limit force, obtained under ideal test conditions, namely:

with the application of a sheet made of low-carbon steel, ensuring maximum field concentration
whose thickness reaches at least 10 mm
with an ideally smooth contact surface
under conditions of ideal adhesion (surface-to-surface)
for force applied at a right angle (pull-off, not shear)
at standard ambient temperature

Practical lifting capacity: influencing factors

Bear in mind that the application force will differ subject to the following factors, starting with the most relevant:

Air gap (betwixt the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, corrosion or debris).
Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Base massiveness – too thin sheet causes magnetic saturation, causing part of the power to be lost to the other side.
Plate material – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and holding force.
Surface structure – the more even the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate reduces the holding force.

Warnings

Medical interference

People with a heart stimulator should maintain an safe separation from magnets. The magnetic field can disrupt the operation of the implant.

Fire risk

Combustion risk: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Skin irritation risks

Nickel alert: The nickel-copper-nickel coating consists of nickel. If redness occurs, cease working with magnets and wear gloves.

Electronic hazard

Device Safety: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

Heat warning

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

Pinching danger

Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Material brittleness

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Compass and GPS

Navigation devices and mobile phones are highly susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

This is not a toy

Adult use only. Small elements can be swallowed, leading to intestinal necrosis. Keep away from children and animals.

Conscious usage

Handle magnets consciously. Their huge power can shock even experienced users. Stay alert and do not underestimate their force.

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

MP 20x8/4x5 / N38 - ring magnet

Technical specification of the product - MP 20x8/4x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical simulation of the magnet - technical parameters

Table 1: Static force (pull vs distance) - power drop MP 20x8/4x5 / N38

Table 2: Shear load (wall) MP 20x8/4x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MP 20x8/4x5 / N38

Table 4: Steel thickness (saturation) - power losses MP 20x8/4x5 / N38

Table 5: Thermal resistance (material behavior) - power drop MP 20x8/4x5 / N38

Table 6: Two magnets (attraction) - field range MP 20x8/4x5 / N38

Table 7: Protective zones (electronics) - warnings MP 20x8/4x5 / N38

Table 8: Dynamics (cracking risk) - collision effects MP 20x8/4x5 / N38

Table 9: Corrosion resistance MP 20x8/4x5 / N38

Table 10: Electrical data (Flux) MP 20x8/4x5 / N38

Table 11: Submerged application MP 20x8/4x5 / N38

1. Vertical hold

2. Steel saturation

3. Heat tolerance

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

Chemical composition

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Induction

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Pros as well as cons of neodymium magnets.

Strengths

Disadvantages

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

Practical lifting capacity: influencing factors

Warnings

Medical interference

Fire risk

Skin irritation risks

Electronic hazard

Heat warning

Pinching danger

Material brittleness

Compass and GPS

This is not a toy

Conscious usage

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - power drop
MP 20x8/4x5 / N38

Table 2: Shear load (wall)
MP 20x8/4x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 20x8/4x5 / N38

Table 4: Steel thickness (saturation) - power losses
MP 20x8/4x5 / N38

Table 5: Thermal resistance (material behavior) - power drop
MP 20x8/4x5 / N38

Table 6: Two magnets (attraction) - field range
MP 20x8/4x5 / N38

Table 7: Protective zones (electronics) - warnings
MP 20x8/4x5 / N38

Table 8: Dynamics (cracking risk) - collision effects
MP 20x8/4x5 / N38

Table 9: Corrosion resistance
MP 20x8/4x5 / N38

Table 10: Electrical data (Flux)
MP 20x8/4x5 / N38

Table 11: Submerged application
MP 20x8/4x5 / N38