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MP 20x8/4x3 / 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 030187

GTIN/EAN: 5906301812043

5.00

Diameter

20 mm [±0,1 mm]

internal diameter Ø

8/4 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

6.79 g

Magnetization Direction

↑ axial

Load capacity

3.14 kg / 30.79 N

Magnetic Induction

178.11 mT / 1781 Gs

Coating

[NiCuNi] Nickel

technical details »

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Technical details - MP 20x8/4x3 / N38 - ring magnet

Specification / characteristics - MP 20x8/4x3 / N38 - ring magnet

properties

properties	values
Cat. no.	030187
GTIN/EAN	5906301812043
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	3 mm [±0,1 mm]
Weight	6.79 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.14 kg / 30.79 N
Magnetic Induction ~ ?	178.11 mT / 1781 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 20x8/4x3 / 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 magnet - report

Presented information constitute the direct effect of a physical analysis. Results are based on models for the class Nd₂Fe₁₄B. Operational performance may deviate from the simulation results. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static force (force vs gap) - power drop
MP 20x8/4x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1531 Gs 153.1 mT	3.14 kg / 6.92 pounds 3140.0 g / 30.8 N	medium risk
1 mm	1457 Gs 145.7 mT	2.84 kg / 6.27 pounds 2843.2 g / 27.9 N	medium risk
2 mm	1352 Gs 135.2 mT	2.45 kg / 5.39 pounds 2446.6 g / 24.0 N	medium risk
3 mm	1227 Gs 122.7 mT	2.02 kg / 4.44 pounds 2016.2 g / 19.8 N	medium risk
5 mm	963 Gs 96.3 mT	1.24 kg / 2.74 pounds 1241.9 g / 12.2 N	weak grip
10 mm	465 Gs 46.5 mT	0.29 kg / 0.64 pounds 289.3 g / 2.8 N	weak grip
15 mm	228 Gs 22.8 mT	0.07 kg / 0.15 pounds 69.7 g / 0.7 N	weak grip
20 mm	122 Gs 12.2 mT	0.02 kg / 0.04 pounds 20.0 g / 0.2 N	weak grip
30 mm	45 Gs 4.5 mT	0.00 kg / 0.01 pounds 2.7 g / 0.0 N	weak grip
50 mm	11 Gs 1.1 mT	0.00 kg / 0.00 pounds 0.2 g / 0.0 N	weak grip

Magnetic force decreases sharply with every mm of gap. Remember that even a very thin break (e.g., contamination, varnish, rust) significantly diminishes the holding power. Magnetic products work most effectively in perfect adhesion; air break weakens the force. Observe how flashily the pull force drop, when the product does not touch flatly to the steel surface. When planning the arrangement, avoid unnecessary gaps.

Table 2: Slippage force (wall)
MP 20x8/4x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.63 kg / 1.38 pounds 628.0 g / 6.2 N
1 mm	Stal (~0.2)	0.57 kg / 1.25 pounds 568.0 g / 5.6 N
2 mm	Stal (~0.2)	0.49 kg / 1.08 pounds 490.0 g / 4.8 N
3 mm	Stal (~0.2)	0.40 kg / 0.89 pounds 404.0 g / 4.0 N
5 mm	Stal (~0.2)	0.25 kg / 0.55 pounds 248.0 g / 2.4 N
10 mm	Stal (~0.2)	0.06 kg / 0.13 pounds 58.0 g / 0.6 N
15 mm	Stal (~0.2)	0.01 kg / 0.03 pounds 14.0 g / 0.1 N
20 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

This section calculates the approximate weight limit required to cause the sliding of the magnet vertically against a vertical steel wall (assuming typical friction coefficient). This value is a function of the air gap between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
MP 20x8/4x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.94 kg / 2.08 pounds 942.0 g / 9.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.63 kg / 1.38 pounds 628.0 g / 6.2 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.31 kg / 0.69 pounds 314.0 g / 3.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.57 kg / 3.46 pounds 1570.0 g / 15.4 N

When placing a magnet on a upright plane (e.g., a board), it you can count on barely about 1/5 of nominal attraction strength. Gravity and a weak degree of grip cause that magnets slip faster than they detach. Planning a vertical fastening? Remember that the shear force is much weaker than the maximum static pull force. On a slippery surface, the element will slide down under a noticeably lighter cargo. Using a rubber layer can significantly increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 20x8/4x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.31 kg / 0.69 pounds 314.0 g / 3.1 N
1 mm	25%	0.79 kg / 1.73 pounds 785.0 g / 7.7 N
2 mm	50%	1.57 kg / 3.46 pounds 1570.0 g / 15.4 N
3 mm	75%	2.36 kg / 5.19 pounds 2355.0 g / 23.1 N
5 mm	100%	3.14 kg / 6.92 pounds 3140.0 g / 30.8 N
10 mm	100%	3.14 kg / 6.92 pounds 3140.0 g / 30.8 N
11 mm	100%	3.14 kg / 6.92 pounds 3140.0 g / 30.8 N
12 mm	100%	3.14 kg / 6.92 pounds 3140.0 g / 30.8 N

A thin sheet is incapable of conduct the full magnetic flux, which squanders power of the holder. If you install a neodymium to a too thin substrate, the magnetism will penetrate right through and the pull force will drop sharply. To achieve 100% of this magnet's power, you need a suitably thick element of metal. The saturation phenomenon means that on delicate walls (e.g., thin profiles), the product holds weaker. We suggest choosing the steel dimension based on the following data.

Table 5: Thermal stability (material behavior) - thermal limit
MP 20x8/4x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	3.14 kg / 6.92 pounds 3140.0 g / 30.8 N	OK
40 °C	-2.2%	3.07 kg / 6.77 pounds 3070.9 g / 30.1 N	OK
60 °C	-4.4%	3.00 kg / 6.62 pounds 3001.8 g / 29.4 N
80 °C	-6.6%	2.93 kg / 6.47 pounds 2932.8 g / 28.8 N
100 °C	-28.8%	2.24 kg / 4.93 pounds 2235.7 g / 21.9 N

Standard neodymium magnets irreversibly lose power after exceeding the maximum temperature. Watch out for overheating – high temperature can irreversibly destroy this magnet. As the temperature rises, the neodymium's power momentarily decreases. Avoid using this magnet close to ovens exceeding its operating temperature limit. Too high temperature will cause destruction of magnetic properties.

*Technical advisory: Thermal stability depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (pancake types) risk losing magnetic properties under lower heat stress compared to rod magnets. Warning indicator in the table points to a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 20x8/4x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	3.71 kg / 8.17 pounds 2 815 Gs	0.56 kg / 1.23 pounds 556 g / 5.5 N	N/A
1 mm	3.55 kg / 7.83 pounds 2 998 Gs	0.53 kg / 1.17 pounds 533 g / 5.2 N	3.20 kg / 7.05 pounds ~0 Gs
2 mm	3.36 kg / 7.40 pounds 2 915 Gs	0.50 kg / 1.11 pounds 503 g / 4.9 N	3.02 kg / 6.66 pounds ~0 Gs
3 mm	3.13 kg / 6.90 pounds 2 815 Gs	0.47 kg / 1.04 pounds 470 g / 4.6 N	2.82 kg / 6.21 pounds ~0 Gs
5 mm	2.63 kg / 5.81 pounds 2 582 Gs	0.40 kg / 0.87 pounds 395 g / 3.9 N	2.37 kg / 5.23 pounds ~0 Gs
10 mm	1.47 kg / 3.23 pounds 1 926 Gs	0.22 kg / 0.48 pounds 220 g / 2.2 N	1.32 kg / 2.91 pounds ~0 Gs
20 mm	0.34 kg / 0.75 pounds 930 Gs	0.05 kg / 0.11 pounds 51 g / 0.5 N	0.31 kg / 0.68 pounds ~0 Gs
50 mm	0.01 kg / 0.02 pounds 143 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.01 pounds 90 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
70 mm	0.00 kg / 0.00 pounds 59 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.00 pounds 41 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 30 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 22 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnetic products interact from a wider radius than a magnet and steel setup. Such a system of two magnets produces a massive flux and a wider radius of performance. Designing a solid fastener? Use a pair of magnets instead of one magnet and a steel. Be careful that when bringing together two magnets, the collision energy is huge. The repulsion force is slightly lower than the attraction, but still significant.
*The magnetic induction in repulsion mode is approximately ~0 Gs in the exact middle between the magnets (due to field cancellation).
Note: Results demonstrate shear force of two identical magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - precautionary measures
MP 20x8/4x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	7.0 cm
Hearing aid	10 Gs (1.0 mT)	5.5 cm
Mechanical watch	20 Gs (2.0 mT)	4.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	3.5 cm
Remote	50 Gs (5.0 mT)	3.0 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Extremely neodym field poses a real danger to IT equipment and pacemakers. These magnets generate a field that disrupts operation of sensitive medical devices. Notice: the unseen radiation penetrates the body and housings. Exceptional care must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - warning
MP 20x8/4x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.90 km/h (6.36 m/s)	0.14 J
30 mm	37.58 km/h (10.44 m/s)	0.37 J
50 mm	48.50 km/h (13.47 m/s)	0.62 J
100 mm	68.58 km/h (19.05 m/s)	1.23 J

Magnetic elements are very brittle – a violent impact against metal can result in shattering. Control the attraction moment – a magnet released freely turns into a projectile. Impact energy can cause material chips or painful pinches to fingers. Be sure to control the product during mounting so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear eye protection when working with powerful specimens.

Table 9: Surface protection spec
MP 20x8/4x3 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (P_c)
MP 20x8/4x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	5 044 Mx	50.4 µWb
P_c Coefficient	0.20	Low (Flat)

Flux value emitted by the magnet pole. Essential parameter when building generators and motors. P_c value defines the working geometry.

Table 11: Hydrostatics and buoyancy
MP 20x8/4x3 / N38

Environment	Effective steel pull	Effect
Air (land)	3.14 kg	Standard
Water (riverbed)	3.60 kg (+0.46 kg buoyancy gain)	+14.5%

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

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

1. Shear force

*Warning: On a vertical wall, the magnet holds only ~20% of its max power.

2. Steel saturation

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

3. Thermal stability

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.20

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.

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%

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: 030187-2026

Measurement Calculator

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Newtons (N)

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The ring magnet with a hole MP 20x8/4x3 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. 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 20x8/4x3 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. One turn too many can destroy the magnet, so do it slowly. 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.

These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but does not ensure full waterproofing. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. This product is dedicated for inside building use. For outdoor applications, we recommend choosing rubberized holders or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 8/4 mm fits this model. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Always check that the screw head is not larger than the outer diameter of the magnet (20 mm), so it doesn't protrude beyond the outline.

It is a magnetic ring with a diameter of 20 mm and thickness 3 mm. The pulling force of this model is an impressive 3.14 kg, which translates to 30.79 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.

Pros as well as cons of Nd₂Fe₁₄B magnets.

Pros

Besides their stability, neodymium magnets are valued for these benefits:

They have constant strength, and over around ten years their performance decreases symbolically – ~1% (according to theory),
Magnets effectively defend themselves against loss of magnetization caused by foreign field sources,
In other words, due to the metallic finish of nickel, the element is aesthetically pleasing,
The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
Considering the option of flexible forming and adaptation to custom solutions, NdFeB magnets can be manufactured in a broad palette of geometric configurations, which amplifies use scope,
Versatile presence in high-tech industry – they serve a role in computer drives, drive modules, advanced medical instruments, as well as other advanced devices.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Disadvantages of neodymium magnets:

At very strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures 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 magnets in rubber or plastics, which secure oxidation and corrosion.
Limited possibility of producing threads in the magnet and complex forms - preferred is cover - magnetic holder.
Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these magnets can be problematic in diagnostics medical after entering the body.
With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

The declared magnet strength concerns the maximum value, recorded under optimal environment, namely:

on a block made of mild steel, perfectly concentrating the magnetic field
possessing a thickness of minimum 10 mm to ensure full flux closure
with a surface cleaned and smooth
with total lack of distance (without paint)
for force applied at a right angle (pull-off, not shear)
at room temperature

What influences lifting capacity in practice

Please note that the working load will differ depending on elements below, starting with the most relevant:

Air gap (betwixt the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to varnish, corrosion or debris).
Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be lost to the other side.
Material composition – different alloys reacts the same. Alloy additives worsen the attraction effect.
Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
Temperature influence – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Warnings

Physical harm

Large magnets can crush fingers instantly. Do not put your hand betwixt two strong magnets.

Machining danger

Fire warning: Rare earth powder is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Implant safety

Warning for patients: Powerful magnets affect electronics. Maintain at least 30 cm distance or request help to handle the magnets.

Danger to the youngest

Adult use only. Small elements can be swallowed, leading to serious injuries. Store away from kids and pets.

Threat to electronics

Data protection: Strong magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, timepieces).

Respect the power

Handle with care. Rare earth magnets attract from a distance and connect with huge force, often quicker than you can move away.

Do not overheat magnets

Avoid heat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, ask us about HT versions (H, SH, UH).

Skin irritation risks

It is widely known that the nickel plating (the usual finish) is a potent allergen. For allergy sufferers, refrain from touching magnets with bare hands or opt for encased magnets.

Impact on smartphones

Note: neodymium magnets produce a field that interferes with sensitive sensors. Maintain a safe distance from your phone, device, and navigation systems.

Magnets are brittle

Beware of splinters. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.

Caution! Details about risks in the article: Magnet Safety Guide.

MP 20x8/4x3 / N38 - ring magnet

Technical details - MP 20x8/4x3 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the magnet - report

Table 1: Static force (force vs gap) - power drop MP 20x8/4x3 / N38

Table 2: Slippage force (wall) MP 20x8/4x3 / N38

Table 3: Wall mounting (sliding) - vertical pull MP 20x8/4x3 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MP 20x8/4x3 / N38

Table 5: Thermal stability (material behavior) - thermal limit MP 20x8/4x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range MP 20x8/4x3 / N38

Table 7: Protective zones (implants) - precautionary measures MP 20x8/4x3 / N38

Table 8: Impact energy (cracking risk) - warning MP 20x8/4x3 / N38

Table 9: Surface protection spec MP 20x8/4x3 / N38

Table 10: Construction data (Pc) MP 20x8/4x3 / N38

Table 11: Hydrostatics and buoyancy MP 20x8/4x3 / N38

1. Shear force

2. Steel saturation

3. Thermal stability

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

Material specification

Ecology and recycling (GPSR)

Pulling force

Magnetic Field

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Pros as well as cons of Nd2Fe14B magnets.

Pros

Limitations

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

What influences lifting capacity in practice

Warnings

Physical harm

Machining danger

Implant safety

Danger to the youngest

Threat to electronics

Respect the power

Do not overheat magnets

Skin irritation risks

Impact on smartphones

Magnets are brittle

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - power drop
MP 20x8/4x3 / N38

Table 2: Slippage force (wall)
MP 20x8/4x3 / N38

Table 3: Wall mounting (sliding) - vertical pull
MP 20x8/4x3 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 20x8/4x3 / N38

Table 5: Thermal stability (material behavior) - thermal limit
MP 20x8/4x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 20x8/4x3 / N38

Table 7: Protective zones (implants) - precautionary measures
MP 20x8/4x3 / N38

Table 8: Impact energy (cracking risk) - warning
MP 20x8/4x3 / N38

Table 9: Surface protection spec
MP 20x8/4x3 / N38

Table 10: Construction data (P_c)
MP 20x8/4x3 / N38

Table 11: Hydrostatics and buoyancy
MP 20x8/4x3 / N38

Pros as well as cons of Nd₂Fe₁₄B magnets.