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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

check technical specifications »

7.75 ZŁ with VAT / pcs + price for transport

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Technical data - 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

Physical modeling of the product - data

The following information constitute the result of a physical calculation. Results rely on models for the material Nd₂Fe₁₄B. Real-world performance might slightly deviate from the simulation results. Treat these calculations as a supplementary guide for designers.

Table 1: Static pull force (force vs gap) - interaction chart
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	warning
1 mm	2265 Gs 226.5 mT	5.81 kg / 12.80 lbs 5807.9 g / 57.0 N	warning
2 mm	2070 Gs 207.0 mT	4.85 kg / 10.69 lbs 4851.0 g / 47.6 N	warning
3 mm	1858 Gs 185.8 mT	3.91 kg / 8.61 lbs 3906.5 g / 38.3 N	warning
5 mm	1437 Gs 143.7 mT	2.34 kg / 5.16 lbs 2338.7 g / 22.9 N	warning
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

Magnetic force drops drastically with every subsequent millimeter of gap. Remember that even a very thin break (e.g., dirt, paint, dust) noticeably weakens the grip. Magnetic products work optimally in perfect adhesion; distance nullifies the power. Observe how quickly the pull force fall, when the magnet does not touch flatly to the steel surface. When planning the arrangement, eliminate redundant distances.

Table 2: Vertical force (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

This section indicates the estimated holding capacity required to cause the slippage of the magnet downwards on a upright metal surface (considering typical friction). This parameter is relative to the gap size between the magnet and the metal.

Table 3: Wall mounting (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 mounting a magnet on a vertical plane (e.g., a fridge), it will only hold barely approx. 1/5 of its nominal power. Gravitational force and a low friction coefficient mean that products slip faster than they pop off the substrate. Want to create a hanger? Consider that the sliding force is significantly lower than the maximum static pull force. On a slippery surface, the magnet will slide down under a much lighter cargo. Utilizing a rubberized layer can significantly raise the stability.

Table 4: Material efficiency (substrate influence) - 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 thin sheet cannot conduct the entire magnetic field, which squanders power of the magnet. Should you install a neodymium to a too thin substrate, the field will pass right through and the holding will be smaller. To squeeze full efficiency of this neodymium's power, you require a sufficiently solid element of steel. The material oversaturation causes that on thin elements (e.g., car bodies), the magnet works worse. We suggest choosing the steel thickness according to the table below.

Table 5: Thermal stability (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

Ordinary NdFeB products lose parameters after exceeding the maximum temperature. Protect against heat – excessive heat can irreversibly damage this product. With every degree above norm, the magnet's capacity temporarily lowers. Avoid using this magnet in hot environments higher than its working range. Too high temperature will lead to destruction of magnetic properties.

*Engineering note: Heat tolerance is determined by both grade, but also on the magnet's shape. Low-profile magnets (low permeance coefficient) risk losing magnetic properties under lower heat stress than long magnets. The danger warning in the table points to a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (repulsion) - 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 wider radius than a neodymium and metal combination. The connection of magnet-to-magnet generates a stronger field and a wider radius of action. Planning to create a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Remember that when connecting a pair of magnets, the pinch force is extreme. The repulsion force is slightly lower than the attraction, but still large.
*Field value in repulsion mode reaches ~0 Gs in the exact middle between the magnets (due to field cancellation).
Important: Figures show shear force of a pair of same magnets (friction ~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
Timepiece	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

A strong magnetic field is a large risk to electronics and medical implants. These magnets generate a field that prevents correct functioning of digital equipment. Notice: the invisible magnetic field passes through tissues and glass. Exceptional care 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, HDD media, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - warning
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 violent impact against metal can result in shattering. Pay attention to connection velocity – a magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or dangerous crushing to skin. Always hold the magnet during installation so it doesn't hit violently against the steel surface. A collision at high speed ends with a crack of the neodymium. Wear safety glasses when working with large magnets.

Table 9: Surface protection spec
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 (P_c)
MP 20x8/4x5 / N38

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

Flux value emitted by the pole surface. Essential parameter in coil applications as well as sensors. The P_c coefficient determines the working geometry.

Table 11: Hydrostatics and buoyancy
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. Wall mount (shear)

*Warning: On a vertical wall, the magnet retains merely ~20% of its nominal pull.

2. Steel thickness impact

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

3. Thermal stability

*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) = 0.31

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

Elemental analysis

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: 030333-2026

Measurement Calculator

Pulling force

Force in kg

lbs

Magnetic Induction

Induction (Gs)

Induction (T)

Enter a value into any field, to see the remaining fields will update automatically.

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The ring magnet with a hole MP 20x8/4x5 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. 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. 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 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. 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.

This model is characterized by dimensions Ø20x5 mm and a weight of 11.31 g. The key parameter here is the holding force amounting to approximately 6.65 kg (force ~65.21 N). The mounting hole diameter is precisely 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). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Strengths and weaknesses of Nd₂Fe₁₄B magnets.

Advantages

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

They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
Magnets effectively protect themselves against loss of magnetization caused by external fields,
Thanks to the smooth finish, the layer of nickel, gold, or silver gives an aesthetic appearance,
Magnets are characterized by exceptionally strong magnetic induction on the outer layer,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
Considering the option of free forming and customization to individualized requirements, magnetic components can be created in a variety of geometric configurations, which amplifies use scope,
Universal use in electronics industry – they are commonly used in HDD drives, motor assemblies, medical devices, also modern systems.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
Due to limitations in producing threads and complex shapes in magnets, we propose using cover - magnetic mount.
Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can disrupt the diagnostic process medical when they are in the body.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what affects it?

Information about lifting capacity was defined for the most favorable conditions, taking into account:

with the contact of a yoke made of low-carbon steel, ensuring full magnetic saturation
whose thickness reaches at least 10 mm
with a surface free of scratches
under conditions of gap-free contact (surface-to-surface)
under vertical force direction (90-degree angle)
at conditions approx. 20°C

Lifting capacity in practice – influencing factors

Real force impacted by specific conditions, such as (from priority):

Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
Metal type – not every steel attracts identically. High carbon content weaken the interaction with the magnet.
Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
Thermal environment – heating the magnet causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate reduces the load capacity.

H&S for magnets

Fragile material

NdFeB magnets are ceramic materials, which means they are fragile like glass. Impact of two magnets leads to them breaking into shards.

Allergy Warning

Some people experience a hypersensitivity to nickel, which is the standard coating for neodymium magnets. Prolonged contact can result in dermatitis. We strongly advise wear safety gloves.

Machining danger

Dust generated during machining of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

Power loss in heat

Monitor thermal conditions. Exposing the magnet to high heat will destroy its properties and pulling force.

Precision electronics

A powerful magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Do not bring magnets near a smartphone to avoid damaging the sensors.

Bone fractures

Big blocks can smash fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.

Magnetic media

Equipment safety: Neodymium magnets can damage payment cards and delicate electronics (heart implants, hearing aids, mechanical watches).

This is not a toy

Product intended for adults. Tiny parts can be swallowed, causing intestinal necrosis. Keep away from children and animals.

Pacemakers

For implant holders: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.

Handling guide

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

Important! Learn more about risks in the article: Safety of working with magnets.

MP 20x8/4x5 / N38 - ring magnet

Technical data - MP 20x8/4x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the product - data

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

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

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

Table 4: Material efficiency (substrate influence) - power losses MP 20x8/4x5 / N38

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

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

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

Table 8: Dynamics (kinetic energy) - warning MP 20x8/4x5 / N38

Table 9: Surface protection spec MP 20x8/4x5 / N38

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

Table 11: Hydrostatics and buoyancy MP 20x8/4x5 / N38

1. Wall mount (shear)

2. Steel thickness impact

3. Thermal stability

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

Elemental analysis

Sustainability

Pulling force

Magnetic Induction

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Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

Weaknesses

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what affects it?

Lifting capacity in practice – influencing factors

H&S for magnets

Fragile material

Allergy Warning

Machining danger

Power loss in heat

Precision electronics

Bone fractures

Magnetic media

This is not a toy

Pacemakers

Handling guide

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

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

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

Table 4: Material efficiency (substrate influence) - power losses
MP 20x8/4x5 / N38

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

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

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

Table 8: Dynamics (kinetic energy) - warning
MP 20x8/4x5 / N38

Table 9: Surface protection spec
MP 20x8/4x5 / N38

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

Table 11: Hydrostatics and buoyancy
MP 20x8/4x5 / N38

Strengths and weaknesses of Nd₂Fe₁₄B magnets.