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MP 20x5x5 / 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 030186

GTIN/EAN: 5906301812036

5.00

Diameter

20 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

11.04 g

Magnetization Direction

↑ axial

Load capacity

6.49 kg / 63.68 N

Magnetic Induction

277.16 mT / 2772 Gs

Coating

[NiCuNi] Nickel

technical specifications »

2.76 ZŁ with VAT / pcs + price for transport

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Product card - MP 20x5x5 / N38 - ring magnet

Specification / characteristics - MP 20x5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030186
GTIN/EAN	5906301812036
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	5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	11.04 g
Magnetization Direction	↑ axial
Load capacity ~ ?	6.49 kg / 63.68 N
Magnetic Induction ~ ?	277.16 mT / 2772 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 20x5x5 / 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

Engineering analysis of the product - data

Presented information represent the direct effect of a engineering analysis. Values rely on models for the material Nd₂Fe₁₄B. Actual performance may deviate from the simulation results. Treat these data as a preliminary roadmap for designers.

Table 1: Static pull force (force vs distance) - power drop
MP 20x5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5917 Gs 591.7 mT	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N	strong
1 mm	5321 Gs 532.1 mT	5.25 kg / 11.57 pounds 5249.3 g / 51.5 N	strong
2 mm	4736 Gs 473.6 mT	4.16 kg / 9.17 pounds 4158.8 g / 40.8 N	strong
3 mm	4184 Gs 418.4 mT	3.25 kg / 7.15 pounds 3245.0 g / 31.8 N	strong
5 mm	3216 Gs 321.6 mT	1.92 kg / 4.23 pounds 1917.2 g / 18.8 N	weak grip
10 mm	1650 Gs 165.0 mT	0.50 kg / 1.11 pounds 504.5 g / 4.9 N	weak grip
15 mm	907 Gs 90.7 mT	0.15 kg / 0.34 pounds 152.6 g / 1.5 N	weak grip
20 mm	544 Gs 54.4 mT	0.05 kg / 0.12 pounds 54.9 g / 0.5 N	weak grip
30 mm	240 Gs 24.0 mT	0.01 kg / 0.02 pounds 10.7 g / 0.1 N	weak grip
50 mm	75 Gs 7.5 mT	0.00 kg / 0.00 pounds 1.0 g / 0.0 N	weak grip

Magnetic force decreases significantly with every subsequent millimeter of spacing. Keep in mind that even a very thin break (e.g., contamination, varnish, veneer) noticeably diminishes the holding power. Neodymiums hold strongest during direct contact; distance nullifies the power. See how flashily the pull force fall, when the product does not adhere tightly to the steel surface. When calculating the assembly, avoid redundant distances.

Table 2: Slippage force (wall)
MP 20x5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.30 kg / 2.86 pounds 1298.0 g / 12.7 N
1 mm	Stal (~0.2)	1.05 kg / 2.31 pounds 1050.0 g / 10.3 N
2 mm	Stal (~0.2)	0.83 kg / 1.83 pounds 832.0 g / 8.2 N
3 mm	Stal (~0.2)	0.65 kg / 1.43 pounds 650.0 g / 6.4 N
5 mm	Stal (~0.2)	0.38 kg / 0.85 pounds 384.0 g / 3.8 N
10 mm	Stal (~0.2)	0.10 kg / 0.22 pounds 100.0 g / 1.0 N
15 mm	Stal (~0.2)	0.03 kg / 0.07 pounds 30.0 g / 0.3 N
20 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 10.0 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

This section indicates the approximate holding capacity needed to initiate the downward movement of the magnet vertically along a upright metal surface (assuming standard friction coefficient). This value is relative to the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 20x5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.95 kg / 4.29 pounds 1947.0 g / 19.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.30 kg / 2.86 pounds 1298.0 g / 12.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.65 kg / 1.43 pounds 649.0 g / 6.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.25 kg / 7.15 pounds 3245.0 g / 31.8 N

When mounting a holder on a upright surface (e.g., a car body), it will maintain just about 1/5 of its maximum pull force. Gravity as well as a weak degree of grip mean that holders slide down faster than they detach. Designing a hanger? Remember that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the element will give way down under a significantly smaller weight. Utilizing a rubberized pad can drastically increase the grip.

Table 4: Material efficiency (saturation) - power losses
MP 20x5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.65 kg / 1.43 pounds 649.0 g / 6.4 N
1 mm	25%	1.62 kg / 3.58 pounds 1622.5 g / 15.9 N
2 mm	50%	3.25 kg / 7.15 pounds 3245.0 g / 31.8 N
3 mm	75%	4.87 kg / 10.73 pounds 4867.5 g / 47.8 N
5 mm	100%	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N
10 mm	100%	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N
11 mm	100%	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N
12 mm	100%	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N

A too thin steel is not enough to conduct the full magnetic flux, which wastes potential of the magnet. If you mount a strong magnet to a weak sheet, the magnetism will pass right through and the attraction force will be weaker. To utilize the maximum of this neodymium's power, you require a sufficiently solid piece of steel. The material oversaturation causes that on thin elements (e.g., thin profiles), the magnet shows lower pull force. We suggest choosing the steel thickness according to the table below.

Table 5: Working in heat (material behavior) - thermal limit
MP 20x5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	6.49 kg / 14.31 pounds 6490.0 g / 63.7 N	OK
40 °C	-2.2%	6.35 kg / 13.99 pounds 6347.2 g / 62.3 N	OK
60 °C	-4.4%	6.20 kg / 13.68 pounds 6204.4 g / 60.9 N	OK
80 °C	-6.6%	6.06 kg / 13.36 pounds 6061.7 g / 59.5 N
100 °C	-28.8%	4.62 kg / 10.19 pounds 4620.9 g / 45.3 N

Classic neodymiums lose power past the thermal threshold. Watch out for overheating – heat can permanently demagnetize this product. With increasing heat, the magnet's force temporarily decreases. Avoid using this magnet close to heaters exceeding its safe range. Too high temperature will lead to irreversible degradation of magnetic properties.

*Engineering note: Temperature resistance is determined by both grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) may lose charge permanently sooner than taller cylinders. Red status in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MP 20x5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	54.03 kg / 119.11 pounds 6 121 Gs	8.10 kg / 17.87 pounds 8104 g / 79.5 N	N/A
1 mm	48.76 kg / 107.50 pounds 11 242 Gs	7.31 kg / 16.13 pounds 7314 g / 71.8 N	43.89 kg / 96.75 pounds ~0 Gs
2 mm	43.70 kg / 96.34 pounds 10 642 Gs	6.55 kg / 14.45 pounds 6555 g / 64.3 N	39.33 kg / 86.71 pounds ~0 Gs
3 mm	38.98 kg / 85.94 pounds 10 051 Gs	5.85 kg / 12.89 pounds 5847 g / 57.4 N	35.08 kg / 77.34 pounds ~0 Gs
5 mm	30.63 kg / 67.54 pounds 8 910 Gs	4.60 kg / 10.13 pounds 4595 g / 45.1 N	27.57 kg / 60.78 pounds ~0 Gs
10 mm	15.96 kg / 35.19 pounds 6 432 Gs	2.39 kg / 5.28 pounds 2394 g / 23.5 N	14.36 kg / 31.67 pounds ~0 Gs
20 mm	4.20 kg / 9.26 pounds 3 299 Gs	0.63 kg / 1.39 pounds 630 g / 6.2 N	3.78 kg / 8.33 pounds ~0 Gs
50 mm	0.19 kg / 0.42 pounds 702 Gs	0.03 kg / 0.06 pounds 29 g / 0.3 N	0.17 kg / 0.38 pounds ~0 Gs
60 mm	0.09 kg / 0.20 pounds 480 Gs	0.01 kg / 0.03 pounds 13 g / 0.1 N	0.08 kg / 0.18 pounds ~0 Gs
70 mm	0.05 kg / 0.10 pounds 342 Gs	0.01 kg / 0.01 pounds 7 g / 0.1 N	0.04 kg / 0.09 pounds ~0 Gs
80 mm	0.02 kg / 0.05 pounds 253 Gs	0.00 kg / 0.01 pounds 4 g / 0.0 N	0.02 kg / 0.05 pounds ~0 Gs
90 mm	0.01 kg / 0.03 pounds 193 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.03 pounds ~0 Gs
100 mm	0.01 kg / 0.02 pounds 150 Gs	0.00 kg / 0.00 pounds 1 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 combination. The connection of two magnets produces a massive flux and a further horizon of operation. Planning to create a solid fastener? Use a pair of magnets instead of one magnet and a steel. Remember that when connecting a pair of magnets, the pinch force is extreme. The repulsion force is marginally weaker than the attraction, but still significant.
*Flux density in repulsion mode reaches ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Important: Calculations apply to friction force of dual same magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
MP 20x5x5 / 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
Timepiece	20 Gs (2.0 mT)	9.0 cm
Mobile device	40 Gs (4.0 mT)	6.5 cm
Remote	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 is a real danger to electronic devices and medical implants. These magnets generate a flux that destroys function of digital equipment. Notice: the unseen radiation acts through matter and housings. Exceptional care must be taken by people with hearing aids and drug dispensers. Also at risk are: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - warning
MP 20x5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	25.61 km/h (7.11 m/s)	0.28 J
30 mm	42.40 km/h (11.78 m/s)	0.77 J
50 mm	54.68 km/h (15.19 m/s)	1.27 J
100 mm	77.33 km/h (21.48 m/s)	2.55 J

Neodymium magnets are very brittle – a strong collision with metal can result in shattering. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Kinetic force can destroy the magnet or painful pinches to fingers. Always hold the magnet during bringing near metal so it doesn't hit violently against the steel surface. A collision at high speed ends with a crack of the magnet. Wear eye protection when playing with large magnets.

Table 9: Coating parameters (durability)
MP 20x5x5 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MP 20x5x5 / N38

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

Total magnetic flux emitted by the pole surface. Essential parameter in coil applications as well as sensors. The P_c coefficient determines the magnet's operating point.

Table 11: Submerged application
MP 20x5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	6.49 kg	Standard
Water (riverbed)	7.43 kg (+0.94 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.

Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its nominal pull.

2. Plate thickness effect

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

3. Heat tolerance

*For N38 grade, 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

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The P_c (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher P_c value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical and environmental data

Material specification

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

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: 030186-2026

Measurement Calculator

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Force in kg

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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 easy screwing to wood, wall, plastic, or metal. This product with a force of 6.49 kg works great as a door latch, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 20x5x5 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable 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.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. 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.

A screw or bolt with a thread diameter smaller than 5 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.

This model is characterized by dimensions Ø20x5 mm and a weight of 11.04 g. The key parameter here is the holding force amounting to approximately 6.49 kg (force ~63.68 N). The mounting hole diameter is precisely 5 mm.

The poles are located on the planes with holes, not on the sides of the ring. In the case of connecting two rings, make sure one is turned the right way. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Pros and cons of neodymium magnets.

Strengths

Apart from their notable holding force, neodymium magnets have these key benefits:

Their power is maintained, and after around ten years it drops only by ~1% (according to research),
They possess excellent resistance to magnetic field loss as a result of external magnetic sources,
A magnet with a shiny gold surface looks better,
They feature high magnetic induction at the operating surface, making them more effective,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures approaching 230°C and above...
Considering the possibility of precise forming and adaptation to unique requirements, neodymium magnets can be manufactured in a variety of geometric configurations, which increases their versatility,
Fundamental importance in advanced technology sectors – they serve a role in mass storage devices, motor assemblies, advanced medical instruments, and modern systems.
Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Limitations

Disadvantages of neodymium magnets:

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a special holder, which not only protects them against impacts but also raises their durability
When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
Due to limitations in realizing nuts and complex forms in magnets, we recommend using cover - magnetic holder.
Possible danger to health – tiny shards of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small components of these devices are able to be problematic in diagnostics medical after entering the body.
With large orders the cost of neodymium magnets can be a barrier,

Holding force characteristics

Magnetic strength at its maximum – what affects it?

The lifting capacity listed is a result of laboratory testing executed under standard conditions:

with the contact of a sheet made of special test steel, ensuring full magnetic saturation
possessing a massiveness of min. 10 mm to ensure full flux closure
with a plane perfectly flat
with zero gap (without impurities)
during pulling in a direction vertical to the mounting surface
at standard ambient temperature

Lifting capacity in practice – influencing factors

Bear in mind that the magnet holding will differ influenced by the following factors, starting with the most relevant:

Gap (betwixt the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
Steel grade – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
Plate texture – ground elements ensure maximum contact, which improves force. Uneven metal reduce efficiency.
Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate decreases the holding force.

Safe handling of NdFeB magnets

Choking Hazard

NdFeB magnets are not toys. Swallowing several magnets can lead to them attracting across intestines, which poses a critical condition and necessitates immediate surgery.

Safe distance

Do not bring magnets close to a wallet, laptop, or TV. The magnetism can destroy these devices and erase data from cards.

Do not drill into magnets

Dust created during cutting of magnets is combustible. Do not drill into magnets unless you are an expert.

Immense force

Be careful. Rare earth magnets act from a distance and snap with massive power, often quicker than you can move away.

Crushing force

Watch your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Warning for heart patients

Patients with a pacemaker must maintain an absolute distance from magnets. The magnetism can stop the functioning of the life-saving device.

Maximum temperature

Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.

Magnetic interference

Navigation devices and mobile phones are highly sensitive to magnetic fields. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Warning for allergy sufferers

It is widely known that the nickel plating (the usual finish) is a potent allergen. If you have an allergy, refrain from direct skin contact and choose coated magnets.

Magnets are brittle

Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Caution! Want to know more? Read our article: Are neodymium magnets dangerous?

MP 20x5x5 / N38 - ring magnet

Product card - MP 20x5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the product - data

Table 1: Static pull force (force vs distance) - power drop MP 20x5x5 / N38

Table 2: Slippage force (wall) MP 20x5x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MP 20x5x5 / N38

Table 4: Material efficiency (saturation) - power losses MP 20x5x5 / N38

Table 5: Working in heat (material behavior) - thermal limit MP 20x5x5 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision MP 20x5x5 / N38

Table 7: Protective zones (implants) - warnings MP 20x5x5 / N38

Table 8: Collisions (kinetic energy) - warning MP 20x5x5 / N38

Table 9: Coating parameters (durability) MP 20x5x5 / N38

Table 10: Electrical data (Flux) MP 20x5x5 / N38

Table 11: Submerged application MP 20x5x5 / N38

1. Sliding resistance

2. Plate thickness effect

3. Heat tolerance

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

Material specification

Sustainability

Magnet pull force

Field Strength

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Pros and cons of neodymium magnets.

Strengths

Limitations

Holding force characteristics

Magnetic strength at its maximum – what affects it?

Lifting capacity in practice – influencing factors

Safe handling of NdFeB magnets

Choking Hazard

Safe distance

Do not drill into magnets

Immense force

Crushing force

Warning for heart patients

Maximum temperature

Magnetic interference

Warning for allergy sufferers

Magnets are brittle

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - power drop
MP 20x5x5 / N38

Table 2: Slippage force (wall)
MP 20x5x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 20x5x5 / N38

Table 4: Material efficiency (saturation) - power losses
MP 20x5x5 / N38

Table 5: Working in heat (material behavior) - thermal limit
MP 20x5x5 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision
MP 20x5x5 / N38

Table 7: Protective zones (implants) - warnings
MP 20x5x5 / N38

Table 8: Collisions (kinetic energy) - warning
MP 20x5x5 / N38

Table 9: Coating parameters (durability)
MP 20x5x5 / N38

Table 10: Electrical data (Flux)
MP 20x5x5 / N38

Table 11: Submerged application
MP 20x5x5 / N38