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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

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3.59 ZŁ with VAT / pcs + price for transport

2.92 ZŁ net + 23% VAT / pcs

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Technical specification of the product - 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

Engineering simulation of the magnet - technical parameters

The following values constitute the result of a mathematical calculation. Values were calculated on algorithms for the material Nd₂Fe₁₄B. Actual conditions might slightly deviate from the simulation results. Treat these calculations as a reference point when designing systems.

Table 1: Static force (force vs distance) - 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 lbs 3140.0 g / 30.8 N	warning
1 mm	1457 Gs 145.7 mT	2.84 kg / 6.27 lbs 2843.2 g / 27.9 N	warning
2 mm	1352 Gs 135.2 mT	2.45 kg / 5.39 lbs 2446.6 g / 24.0 N	warning
3 mm	1227 Gs 122.7 mT	2.02 kg / 4.44 lbs 2016.2 g / 19.8 N	warning
5 mm	963 Gs 96.3 mT	1.24 kg / 2.74 lbs 1241.9 g / 12.2 N	weak grip
10 mm	465 Gs 46.5 mT	0.29 kg / 0.64 lbs 289.3 g / 2.8 N	weak grip
15 mm	228 Gs 22.8 mT	0.07 kg / 0.15 lbs 69.7 g / 0.7 N	weak grip
20 mm	122 Gs 12.2 mT	0.02 kg / 0.04 lbs 20.0 g / 0.2 N	weak grip
30 mm	45 Gs 4.5 mT	0.00 kg / 0.01 lbs 2.7 g / 0.0 N	weak grip
50 mm	11 Gs 1.1 mT	0.00 kg / 0.00 lbs 0.2 g / 0.0 N	weak grip

Magnetic force decreases drastically per each millimeter of gap. Note that every additional insulation layer (e.g., contamination, paint, dust) significantly reduces the pull force. Magnets work most effectively at the point of direct contact; gap drastically cuts the power. Notice how rapidly the pull force fall, when the magnet does not touch tightly to the metal substrate. When planning the arrangement, discard additional spacers.

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

This section shows the approximate weight limit necessary to initiate the slippage of the magnet down on a vertical steel wall (assuming typical friction). This parameter is a function of the distance between the magnet and the surface.

Table 3: Vertical assembly (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 lbs 942.0 g / 9.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.63 kg / 1.38 lbs 628.0 g / 6.2 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.31 kg / 0.69 lbs 314.0 g / 3.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.57 kg / 3.46 lbs 1570.0 g / 15.4 N

When mounting a magnet on a upright wall (e.g., a car body), it will only hold just approx. 20%-30% of its maximum pull force. Gravity as well as a low friction coefficient influence the fact that magnets move down faster than they detach. Designing a hanger? Note that the shear force is significantly lower than the maximum static pull force. On a painted metal, the magnet will slide down under a much lighter load. Utilizing a rubberized layer can drastically raise the stability.

Table 4: Steel thickness (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 lbs 314.0 g / 3.1 N
1 mm	25%	0.79 kg / 1.73 lbs 785.0 g / 7.7 N
2 mm	50%	1.57 kg / 3.46 lbs 1570.0 g / 15.4 N
3 mm	75%	2.36 kg / 5.19 lbs 2355.0 g / 23.1 N
5 mm	100%	3.14 kg / 6.92 lbs 3140.0 g / 30.8 N
10 mm	100%	3.14 kg / 6.92 lbs 3140.0 g / 30.8 N
11 mm	100%	3.14 kg / 6.92 lbs 3140.0 g / 30.8 N
12 mm	100%	3.14 kg / 6.92 lbs 3140.0 g / 30.8 N

A too thin steel is not enough to conduct the entire magnetic field, which squanders power of the magnet. If you install a neodymium to a thin surface, the flux will pass right through and the attraction force will be weaker. To squeeze full efficiency of this magnet's potential, you require a sufficiently solid element of metal. The saturation phenomenon means that on thin elements (e.g., thin profiles), the holder holds weaker. We advise picking the steel cross-section from these parameters.

Table 5: Working in heat (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 lbs 3140.0 g / 30.8 N	OK
40 °C	-2.2%	3.07 kg / 6.77 lbs 3070.9 g / 30.1 N	OK
60 °C	-4.4%	3.00 kg / 6.62 lbs 3001.8 g / 29.4 N
80 °C	-6.6%	2.93 kg / 6.47 lbs 2932.8 g / 28.8 N
100 °C	-28.8%	2.24 kg / 4.93 lbs 2235.7 g / 21.9 N

Ordinary NdFeB products change their properties power past the thermal threshold. Watch out for overheating – high temperature can irreversibly destroy this product. As the temperature rises, the neodymium's force briefly decreases. Do not use this product in hot environments higher than its safe range. Too high temperature will result in destruction of magnetism.

*Engineering note: Temperature resistance is determined by both grade, as well as the dimension ratios. Thin magnets (pancake types) risk losing magnetic properties sooner than taller cylinders. Red status in the table signals a risk of irreversible loss for this particular item.

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

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

Two strong neodymiums 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 wider radius of performance. Designing a strong closure? Apply two magnets instead of one magnet and a striker plate. Exercise caution that when connecting a pair of magnets, the collision energy is huge. The levitation is slightly lower than the connection force, but still large.
*Flux density in repulsion mode is approximately ~0 Gs in the exact middle of the gap (resulting from vector opposition).
Important: Estimates refer to shear force of dual matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - 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
Mobile device	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

A strong magnetic field is a serious hazard to electronic devices as well as medical implants. These NdFeB products produce a flux that destroys function of digital equipment. Notice: the invisible magnetic field penetrates the body and glass. Special caution must be taken by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
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

Neodymium magnets are delicate – a strong collision with metal causes immediate chipping. Control the attraction moment – a magnet released freely speeds with massive force. Kinetic force can trigger coating fragments or dangerous crushing to skin. Always hold the magnet during mounting so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Use safety goggles when handling with powerful specimens.

Table 9: Corrosion resistance
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. Improper coating selection is the most common cause of magnet failure over time.

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)

Total magnetic flux passing through the magnet pole. Essential parameter in coil applications as well as sensors. P_c value defines the working geometry.

Table 11: Submerged application
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Caution: On a vertical wall, the magnet holds only approx. 20-30% of its max power.

2. Efficiency vs thickness

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

3. Power loss vs temp

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

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

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

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.

Technical and environmental data

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%

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

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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 3.14 kg works great as a cabinet closure, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 20x8/4x3 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. When tightening the screw, you must maintain great sensitivity. We recommend tightening manually with a screwdriver, not an impact driver, because 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 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.

The inner hole diameter determines the maximum size of the mounting element. 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.

This model is characterized by dimensions Ø20x3 mm and a weight of 6.79 g. The key parameter here is the holding force amounting to approximately 3.14 kg (force ~30.79 N). The mounting hole diameter is precisely 8/4 mm.

The poles are located on the planes with holes, not on the sides of the ring. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages and disadvantages of neodymium magnets.

Pros

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

They virtually do not lose strength, 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,
By using a decorative layer of nickel, the element gains an nice look,
Magnetic induction on the working layer of the magnet is strong,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
Possibility of exact machining as well as adjusting to atypical requirements,
Significant place in advanced technology sectors – they are utilized in magnetic memories, electric motors, medical devices, also industrial machines.
Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Disadvantages

Problematic aspects of neodymium magnets and ways of using them

To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
Due to limitations in producing threads and complicated forms in magnets, we propose using cover - magnetic mechanism.
Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the context of child safety. Additionally, tiny parts of these products can be problematic in diagnostics medical when they are in the body.
Due to complex production process, their price is higher than average,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what affects it?

Information about lifting capacity is the result of a measurement for the most favorable conditions, including:

on a base made of mild steel, effectively closing the magnetic flux
whose transverse dimension reaches at least 10 mm
with an polished touching surface
with zero gap (without impurities)
under axial force vector (90-degree angle)
at conditions approx. 20°C

Determinants of lifting force in real conditions

In practice, the actual holding force is determined by many variables, presented from crucial:

Clearance – the presence of any layer (rust, dirt, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of maximum force).
Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
Material type – the best choice is pure iron steel. Hardened steels may attract less.
Smoothness – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
Temperature influence – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Warnings

Thermal limits

Do not overheat. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).

Finger safety

Protect your hands. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Be careful!

Handling rules

Be careful. Neodymium magnets attract from a long distance and connect with massive power, often quicker than you can move away.

Fragile material

Watch out for shards. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.

Allergy Warning

Some people have a contact allergy to Ni, which is the common plating for NdFeB magnets. Extended handling might lead to an allergic reaction. We recommend wear safety gloves.

Threat to electronics

Intense magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.

Danger to pacemakers

Warning for patients: Powerful magnets affect medical devices. Keep minimum 30 cm distance or ask another person to work with the magnets.

Do not give to children

Neodymium magnets are not intended for children. Swallowing multiple magnets can lead to them attracting across intestines, which constitutes a direct threat to life and necessitates immediate surgery.

Dust explosion hazard

Machining of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Precision electronics

Navigation devices and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Security! Learn more about risks in the article: Magnet Safety Guide.

MP 20x8/4x3 / N38 - ring magnet

Technical specification of the product - MP 20x8/4x3 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the magnet - technical parameters

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

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

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

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

Table 5: Working in heat (material behavior) - thermal limit MP 20x8/4x3 / N38

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

Table 7: Hazards (electronics) - precautionary measures MP 20x8/4x3 / N38

Table 8: Dynamics (cracking risk) - collision effects MP 20x8/4x3 / N38

Table 9: Corrosion resistance MP 20x8/4x3 / N38

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

Table 11: Submerged application MP 20x8/4x3 / N38

1. Wall mount (shear)

2. Efficiency vs thickness

3. Power loss vs temp

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

Elemental analysis

Ecology and recycling (GPSR)

Pulling force

Magnetic Field

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Advantages and disadvantages of neodymium magnets.

Pros

Disadvantages

Holding force characteristics

Maximum lifting force for a neodymium magnet – what affects it?

Determinants of lifting force in real conditions

Warnings

Thermal limits

Finger safety

Handling rules

Fragile material

Allergy Warning

Threat to electronics

Danger to pacemakers

Do not give to children

Dust explosion hazard

Precision electronics

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

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

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

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

Table 5: Working in heat (material behavior) - thermal limit
MP 20x8/4x3 / N38

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

Table 7: Hazards (electronics) - precautionary measures
MP 20x8/4x3 / N38

Table 8: Dynamics (cracking risk) - collision effects
MP 20x8/4x3 / N38

Table 9: Corrosion resistance
MP 20x8/4x3 / N38

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

Table 11: Submerged application
MP 20x8/4x3 / N38