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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

technical specifications »

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Physical properties - 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 assembly - report

Presented information constitute the outcome of a engineering simulation. Results were calculated on algorithms for the material Nd₂Fe₁₄B. Real-world parameters may deviate from the simulation results. Use these calculations as a reference point for designers.

Table 1: Static force (pull vs gap) - 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 pounds 6650.0 g / 65.2 N	strong
1 mm	2265 Gs 226.5 mT	5.81 kg / 12.80 pounds 5807.9 g / 57.0 N	strong
2 mm	2070 Gs 207.0 mT	4.85 kg / 10.69 pounds 4851.0 g / 47.6 N	strong
3 mm	1858 Gs 185.8 mT	3.91 kg / 8.61 pounds 3906.5 g / 38.3 N	strong
5 mm	1437 Gs 143.7 mT	2.34 kg / 5.16 pounds 2338.7 g / 22.9 N	strong
10 mm	691 Gs 69.1 mT	0.54 kg / 1.19 pounds 540.5 g / 5.3 N	weak grip
15 mm	343 Gs 34.3 mT	0.13 kg / 0.29 pounds 133.3 g / 1.3 N	weak grip
20 mm	186 Gs 18.6 mT	0.04 kg / 0.09 pounds 39.3 g / 0.4 N	weak grip
30 mm	70 Gs 7.0 mT	0.01 kg / 0.01 pounds 5.5 g / 0.1 N	weak grip
50 mm	18 Gs 1.8 mT	0.00 kg / 0.00 pounds 0.4 g / 0.0 N	weak grip

Pulling power weakens significantly with every subsequent millimeter of spacing. Remember that even a very thin break (e.g., contamination, paint, veneer) significantly weakens the grip. Neodymiums work strongest during direct contact; air break drastically cuts the force. Notice how rapidly the load capacity drop, when the magnet does not adhere flatly to the metal substrate. When planning the assembly, avoid redundant distances.

Table 2: Vertical 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 pounds 1330.0 g / 13.0 N
1 mm	Stal (~0.2)	1.16 kg / 2.56 pounds 1162.0 g / 11.4 N
2 mm	Stal (~0.2)	0.97 kg / 2.14 pounds 970.0 g / 9.5 N
3 mm	Stal (~0.2)	0.78 kg / 1.72 pounds 782.0 g / 7.7 N
5 mm	Stal (~0.2)	0.47 kg / 1.03 pounds 468.0 g / 4.6 N
10 mm	Stal (~0.2)	0.11 kg / 0.24 pounds 108.0 g / 1.1 N
15 mm	Stal (~0.2)	0.03 kg / 0.06 pounds 26.0 g / 0.3 N
20 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The table below defines the approximate weight limit required to start the downward movement of the magnet downwards along a upright metal surface (considering typical friction coefficient). This parameter is relative to the separation distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - 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 pounds 1995.0 g / 19.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.33 kg / 2.93 pounds 1330.0 g / 13.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.67 kg / 1.47 pounds 665.0 g / 6.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.33 kg / 7.33 pounds 3325.0 g / 32.6 N

When mounting a magnet on a upright surface (e.g., a fridge), it will only hold just approx. 1/5 of its maximum pull force. Gravity as well as a low friction coefficient mean that magnets move down faster than they pull off. Designing a wall mount? Note that the sliding force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the holder will slide down under a much lighter cargo. Application of an anti-slip pad can effectively raise the stability.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 20x8/4x5 / N38

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

A too thin steel is unable to focus the entire magnetic field, which wastes potential of the holder. Should you attach a powerful product to a weak sheet, the magnetism will pass right through and the holding will be smaller. To achieve 100% of this neodymium's power, you require a sufficiently solid element of steel. The saturation phenomenon causes that on sheet metal structures (e.g., car bodies), the holder works worse. We advise picking the steel thickness based on the following data.

Table 5: Thermal stability (stability) - resistance threshold
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 pounds 6650.0 g / 65.2 N	OK
40 °C	-2.2%	6.50 kg / 14.34 pounds 6503.7 g / 63.8 N	OK
60 °C	-4.4%	6.36 kg / 14.02 pounds 6357.4 g / 62.4 N
80 °C	-6.6%	6.21 kg / 13.69 pounds 6211.1 g / 60.9 N
100 °C	-28.8%	4.73 kg / 10.44 pounds 4734.8 g / 46.4 N

Standard neodymium magnets lose power above the temperature limit. Watch out for overheating – high temperature can permanently damage this product. As the temperature rises, the neodymium's power temporarily decreases. Avoid using this product close to heaters exceeding its safe range. Ignoring the limit will result in destruction of magnetic properties.

*Technical advisory: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) may lose charge permanently sooner than taller cylinders. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MP 20x8/4x5 / N38

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

Two magnets interact from a significantly greater distance than a magnet and sheet setup. Such a system of magnet-to-magnet generates a stronger field and a further horizon of operation. Planning to create a solid fastener? Utilize two neodymiums instead of a neodymium and a steel. Be careful that when attracting two neodymiums, the pinch force is extreme. The levitation is slightly lower than the attraction, but still significant.
*Flux density in repulsion mode is approximately ~0 Gs at the midpoint of the gap (due to field cancellation).
Note: Estimates refer to friction force of dual identical magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - precautionary measures
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
Mobile device	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

Powerful magnet radiation is a large risk to electronic devices as well as pacemakers. These magnets generate a flux that destroys function of sensitive medical devices. Be aware: the invisible magnetic field penetrates the body and glass. Increased vigilance must be taken by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, car keys, membranes, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

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

Neodymium magnets are prone to chipping – a collision with steel risks their cracking. Control the attraction moment – a magnet released freely becomes dangerous. Striking energy can trigger coating fragments or painful pinches to skin. Be sure to control the product during bringing near metal so it doesn't slam with momentum against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Wear eye protection when working with powerful specimens.

Table 9: Anti-corrosion coating durability
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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

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 passing through the magnet pole. Key data for generator designers as well as sensors. P_c value determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
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: 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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Note: On a vertical wall, the magnet holds only approx. 20-30% of its perpendicular strength.

2. Steel saturation

*Thin steel (e.g. computer case) drastically weakens the holding force.

3. Power loss vs temp

*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) = 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%

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: 030333-2026

Measurement Calculator

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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. This product with a force of 6.65 kg works great as a cabinet closure, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 20x8/4x5 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because too much pressure 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. Aesthetic mounting requires selecting the appropriate head size.

This model is characterized by dimensions Ø20x5 mm and a weight of 11.31 g. 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.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. 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.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Benefits

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

They retain magnetic properties for almost 10 years – the loss is just ~1% (according to analyses),
They are noted for resistance to demagnetization induced by external field influence,
In other words, due to the smooth surface of gold, the element gains visual value,
Magnetic induction on the surface of the magnet turns out to be very high,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to modularity in designing and the ability to modify to unusual requirements,
Fundamental importance in modern industrial fields – they serve a role in mass storage devices, electromotive mechanisms, precision medical tools, and other advanced devices.
Thanks to their power density, small magnets offer high operating force, in miniature format,

Disadvantages

Drawbacks and weaknesses of neodymium magnets and proposals for their use:

Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise 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 prevent oxidation and corrosion.
We suggest a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated forms.
Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. Furthermore, small components of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

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

The load parameter shown refers to the maximum value, measured under optimal environment, namely:

using a base made of mild steel, functioning as a circuit closing element
possessing a massiveness of min. 10 mm to ensure full flux closure
characterized by even structure
without any air gap between the magnet and steel
for force applied at a right angle (in the magnet axis)
in stable room temperature

Lifting capacity in practice – influencing factors

Effective lifting capacity is influenced by specific conditions, including (from most important):

Air gap (betwixt the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, corrosion or debris).
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.
Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
Metal type – different alloys attracts identically. Alloy additives weaken the attraction effect.
Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity was measured with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.

H&S for magnets

Allergy Warning

It is widely known that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, prevent direct skin contact and choose versions in plastic housing.

This is not a toy

Neodymium magnets are not toys. Eating a few magnets may result in them pinching intestinal walls, which constitutes a direct threat to life and necessitates urgent medical intervention.

Flammability

Machining of NdFeB material carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Handling rules

Handle magnets consciously. Their huge power can shock even professionals. Stay alert and respect their power.

Pinching danger

Large magnets can crush fingers instantly. Never place your hand between two attracting surfaces.

Medical implants

For implant holders: Powerful magnets disrupt electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Keep away from computers

Equipment safety: Strong magnets can ruin payment cards and delicate electronics (heart implants, medical aids, mechanical watches).

Maximum temperature

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Shattering risk

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

GPS Danger

GPS units and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can decalibrate the sensors in your phone.

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

MP 20x8/4x5 / N38 - ring magnet

Physical properties - 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 assembly - report

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

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

Table 3: Wall mounting (sliding) - behavior on slippery surfaces MP 20x8/4x5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MP 20x8/4x5 / N38

Table 5: Thermal stability (stability) - resistance threshold MP 20x8/4x5 / N38

Table 6: Two magnets (attraction) - forces in the system MP 20x8/4x5 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures MP 20x8/4x5 / N38

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

Table 9: Anti-corrosion coating durability MP 20x8/4x5 / N38

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

Table 11: Underwater work (magnet fishing) MP 20x8/4x5 / N38

1. Vertical hold

2. Steel saturation

3. Power loss vs temp

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

Chemical composition

Environmental data

Force (pull)

Field Strength

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Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

Disadvantages

Pull force analysis

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

Lifting capacity in practice – influencing factors

H&S for magnets

Allergy Warning

This is not a toy

Flammability

Handling rules

Pinching danger

Medical implants

Keep away from computers

Maximum temperature

Shattering risk

GPS Danger

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

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

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 20x8/4x5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 20x8/4x5 / N38

Table 5: Thermal stability (stability) - resistance threshold
MP 20x8/4x5 / N38

Table 6: Two magnets (attraction) - forces in the system
MP 20x8/4x5 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures
MP 20x8/4x5 / N38

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

Table 9: Anti-corrosion coating durability
MP 20x8/4x5 / N38

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

Table 11: Underwater work (magnet fishing)
MP 20x8/4x5 / N38

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.