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MP 40x20x5 / 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 030199

GTIN/EAN: 5906301812166

5.00

Diameter

40 mm [±0,1 mm]

internal diameter Ø

20 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

35.34 g

Magnetization Direction

↑ axial

Load capacity

7.24 kg / 70.98 N

Magnetic Induction

150.36 mT / 1504 Gs

Coating

[NiCuNi] Nickel

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12.24 ZŁ with VAT / pcs + price for transport

9.95 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Call us +48 888 99 98 98 or let us know through request form through our site.
Strength as well as appearance of a neodymium magnet can be tested on our modular calculator.

Orders placed before 14:00 will be shipped the same business day.

Product card - MP 40x20x5 / N38 - ring magnet

Specification / characteristics - MP 40x20x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030199
GTIN/EAN	5906301812166
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	40 mm [±0,1 mm]
internal diameter Ø	20 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	35.34 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.24 kg / 70.98 N
Magnetic Induction ~ ?	150.36 mT / 1504 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 40x20x5 / 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 modeling of the assembly - data

These data represent the outcome of a mathematical simulation. Results are based on models for the class Nd₂Fe₁₄B. Operational performance may deviate from the simulation results. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs distance) - interaction chart
MP 40x20x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5269 Gs 526.9 mT	7.24 kg / 15.96 LBS 7240.0 g / 71.0 N	warning
1 mm	5005 Gs 500.5 mT	6.53 kg / 14.41 LBS 6534.7 g / 64.1 N	warning
2 mm	4739 Gs 473.9 mT	5.86 kg / 12.91 LBS 5857.7 g / 57.5 N	warning
3 mm	4475 Gs 447.5 mT	5.22 kg / 11.51 LBS 5222.2 g / 51.2 N	warning
5 mm	3960 Gs 396.0 mT	4.09 kg / 9.02 LBS 4090.8 g / 40.1 N	warning
10 mm	2832 Gs 283.2 mT	2.09 kg / 4.61 LBS 2092.3 g / 20.5 N	warning
15 mm	1990 Gs 199.0 mT	1.03 kg / 2.28 LBS 1033.4 g / 10.1 N	low risk
20 mm	1407 Gs 140.7 mT	0.52 kg / 1.14 LBS 516.3 g / 5.1 N	low risk
30 mm	745 Gs 74.5 mT	0.14 kg / 0.32 LBS 144.6 g / 1.4 N	low risk
50 mm	268 Gs 26.8 mT	0.02 kg / 0.04 LBS 18.7 g / 0.2 N	low risk

Grip strength decreases drastically with every mm of spacing. Note that every additional insulation layer (e.g., dirt, paint, rust) significantly reduces the pull force. Magnets operate strongest during direct contact; distance kills the power. See how flashily the load capacity drop, when the product does not touch tightly to the metal substrate. When planning the arrangement, discard redundant distances.

Table 2: Sliding capacity (wall)
MP 40x20x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.45 kg / 3.19 LBS 1448.0 g / 14.2 N
1 mm	Stal (~0.2)	1.31 kg / 2.88 LBS 1306.0 g / 12.8 N
2 mm	Stal (~0.2)	1.17 kg / 2.58 LBS 1172.0 g / 11.5 N
3 mm	Stal (~0.2)	1.04 kg / 2.30 LBS 1044.0 g / 10.2 N
5 mm	Stal (~0.2)	0.82 kg / 1.80 LBS 818.0 g / 8.0 N
10 mm	Stal (~0.2)	0.42 kg / 0.92 LBS 418.0 g / 4.1 N
15 mm	Stal (~0.2)	0.21 kg / 0.45 LBS 206.0 g / 2.0 N
20 mm	Stal (~0.2)	0.10 kg / 0.23 LBS 104.0 g / 1.0 N
30 mm	Stal (~0.2)	0.03 kg / 0.06 LBS 28.0 g / 0.3 N
50 mm	Stal (~0.2)	0.00 kg / 0.01 LBS 4.0 g / 0.0 N

The following data presents the estimated shear load needed to cause the shifting of the magnet down against a vertical steel wall (assuming standard friction). This value varies with the gap size between the magnet and the surface.

Table 3: Wall mounting (shearing) - vertical pull
MP 40x20x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.17 kg / 4.79 LBS 2172.0 g / 21.3 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.45 kg / 3.19 LBS 1448.0 g / 14.2 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.72 kg / 1.60 LBS 724.0 g / 7.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.62 kg / 7.98 LBS 3620.0 g / 35.5 N

When placing a holder on a upright surface (e.g., a car body), it will maintain only approx. 20%-30% of nominal attraction strength. Gravitational force as well as a low friction coefficient mean that magnets move down faster than they pop off the substrate. Want to create a hanger? Remember that the shear force is significantly lower than the maximum static pull force. On a smooth steel, the element will slip down under a noticeably lighter load. Using a rubber layer can effectively improve the result.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 40x20x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.72 kg / 1.60 LBS 724.0 g / 7.1 N
1 mm	25%	1.81 kg / 3.99 LBS 1810.0 g / 17.8 N
2 mm	50%	3.62 kg / 7.98 LBS 3620.0 g / 35.5 N
3 mm	75%	5.43 kg / 11.97 LBS 5430.0 g / 53.3 N
5 mm	100%	7.24 kg / 15.96 LBS 7240.0 g / 71.0 N
10 mm	100%	7.24 kg / 15.96 LBS 7240.0 g / 71.0 N
11 mm	100%	7.24 kg / 15.96 LBS 7240.0 g / 71.0 N
12 mm	100%	7.24 kg / 15.96 LBS 7240.0 g / 71.0 N

A thin metal plate cannot focus the entire magnetic field, which squanders power of the magnet. If you install a neodymium to a too thin substrate, the flux will pass right through and the pull force will drop sharply. To squeeze full efficiency of this neodymium's potential, you require a sufficiently solid backing of steel. The material oversaturation means that on delicate walls (e.g., thin profiles), the magnet shows lower pull force. We recommend selecting the steel dimension based on the following data.

Table 5: Thermal stability (stability) - resistance threshold
MP 40x20x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.24 kg / 15.96 LBS 7240.0 g / 71.0 N	OK
40 °C	-2.2%	7.08 kg / 15.61 LBS 7080.7 g / 69.5 N	OK
60 °C	-4.4%	6.92 kg / 15.26 LBS 6921.4 g / 67.9 N	OK
80 °C	-6.6%	6.76 kg / 14.91 LBS 6762.2 g / 66.3 N
100 °C	-28.8%	5.15 kg / 11.36 LBS 5154.9 g / 50.6 N

Ordinary NdFeB products change their properties parameters past the thermal threshold. Avoid high temperatures – high temperature can permanently destroy this product. With increasing heat, the magnet's capacity temporarily drops. Refrain from using this product close to heaters exceeding its operating temperature limit. Ignoring the limit will cause permanent loss of magnetic properties.

*Engineering note: Temperature resistance is determined by both grade, but also on the magnet's shape. Flat magnets (pancake types) may lose charge permanently under lower heat stress than taller cylinders. Warning indicator in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (repulsion) - field collision
MP 40x20x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	179.94 kg / 396.69 LBS 5 920 Gs	26.99 kg / 59.50 LBS 26991 g / 264.8 N	N/A
1 mm	171.16 kg / 377.35 LBS 10 277 Gs	25.67 kg / 56.60 LBS 25675 g / 251.9 N	154.05 kg / 339.62 LBS ~0 Gs
2 mm	162.41 kg / 358.05 LBS 10 011 Gs	24.36 kg / 53.71 LBS 24361 g / 239.0 N	146.17 kg / 322.24 LBS ~0 Gs
3 mm	153.87 kg / 339.24 LBS 9 744 Gs	23.08 kg / 50.89 LBS 23081 g / 226.4 N	138.49 kg / 305.31 LBS ~0 Gs
5 mm	137.55 kg / 303.25 LBS 9 213 Gs	20.63 kg / 45.49 LBS 20633 g / 202.4 N	123.80 kg / 272.92 LBS ~0 Gs
10 mm	101.67 kg / 224.14 LBS 7 921 Gs	15.25 kg / 33.62 LBS 15251 g / 149.6 N	91.50 kg / 201.73 LBS ~0 Gs
20 mm	52.00 kg / 114.64 LBS 5 665 Gs	7.80 kg / 17.20 LBS 7800 g / 76.5 N	46.80 kg / 103.18 LBS ~0 Gs
50 mm	6.64 kg / 14.64 LBS 2 025 Gs	1.00 kg / 2.20 LBS 996 g / 9.8 N	5.98 kg / 13.18 LBS ~0 Gs
60 mm	3.59 kg / 7.92 LBS 1 489 Gs	0.54 kg / 1.19 LBS 539 g / 5.3 N	3.23 kg / 7.13 LBS ~0 Gs
70 mm	2.03 kg / 4.48 LBS 1 120 Gs	0.30 kg / 0.67 LBS 305 g / 3.0 N	1.83 kg / 4.03 LBS ~0 Gs
80 mm	1.20 kg / 2.64 LBS 860 Gs	0.18 kg / 0.40 LBS 180 g / 1.8 N	1.08 kg / 2.38 LBS ~0 Gs
90 mm	0.73 kg / 1.62 LBS 673 Gs	0.11 kg / 0.24 LBS 110 g / 1.1 N	0.66 kg / 1.46 LBS ~0 Gs
100 mm	0.47 kg / 1.03 LBS 536 Gs	0.07 kg / 0.15 LBS 70 g / 0.7 N	0.42 kg / 0.92 LBS ~0 Gs

Two magnets attract each other from a much further distance than a magnet and sheet combination. The setup of two magnets creates a more powerful interaction and a wider radius of operation. Want to build a strong closure? Apply two magnets instead of a neodymium and a striker plate. Exercise caution that when attracting two neodymiums, the impact force is massive. The repulsion force is slightly lower than the connection force, but still impressive.
*Flux density for N-N configuration reaches ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Important: Results show friction force of a pair of identical neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Hazards (electronics) - warnings
MP 40x20x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	24.0 cm
Hearing aid	10 Gs (1.0 mT)	18.5 cm
Timepiece	20 Gs (2.0 mT)	14.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	11.0 cm
Car key	50 Gs (5.0 mT)	10.5 cm
Payment card	400 Gs (40.0 mT)	4.5 cm
HDD hard drive	600 Gs (60.0 mT)	3.5 cm

A strong magnetic field is a serious hazard to IT equipment and medical implants. These neodymiums generate a flux that destroys function of sensitive medical devices. Be aware: the invisible magnetic field penetrates the body and housings. Special caution must be exercised by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, car keys, membranes, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MP 40x20x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	16.84 km/h (4.68 m/s)	0.39 J
30 mm	25.31 km/h (7.03 m/s)	0.87 J
50 mm	32.33 km/h (8.98 m/s)	1.43 J
100 mm	45.65 km/h (12.68 m/s)	2.84 J

NdFeB products are prone to chipping – a violent impact against metal causes immediate chipping. Watch the impact speed – a magnet released freely turns into a projectile. Striking energy can cause material chips or dangerous crushing to skin. Hold the magnet firmly during installation so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear eye protection when handling with powerful specimens.

Table 9: Corrosion resistance
MP 40x20x5 / 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)

The following table defines the conditions under which this product can be safely used. Note the thickness of the protective layer.

Table 10: Construction data (P_c)
MP 40x20x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	56 325 Mx	563.3 µWb
P_c Coefficient	0.80	High (Stable)

Flux value passing through the pole surface. Key data for generator designers as well as sensors. The P_c coefficient defines the working geometry.

Table 11: Hydrostatics and buoyancy
MP 40x20x5 / N38

Environment	Effective steel pull	Effect
Air (land)	7.24 kg	Standard
Water (riverbed)	8.29 kg (+1.05 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.

Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.

1. Vertical hold

*Note: On a vertical wall, the magnet holds merely a fraction of its max power.

2. Plate thickness effect

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

3. Power loss vs temp

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.80

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

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%

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: 030199-2026

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The ring magnet with a hole MP 40x20x5 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. 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 40x20x5 / 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 excessive force will cause the ring to crack. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.

These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but is not sufficient for rain. Damage to the protective layer during assembly is the most common cause of rusting. If you must use it outside, paint it with anti-corrosion paint after mounting.

A screw or bolt with a thread diameter smaller than 20 mm fits this model. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.

The presented product is a ring magnet with dimensions Ø40 mm (outer diameter) and height 5 mm. The key parameter here is the holding force amounting to approximately 7.24 kg (force ~70.98 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 20 mm.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. In the case of connecting two rings, make sure one is turned the right way. We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

They do not lose magnetism, even during nearly 10 years – the decrease in strength is only ~1% (theoretically),
Magnets effectively protect themselves against demagnetization caused by foreign field sources,
In other words, due to the reflective surface of silver, the element is aesthetically pleasing,
The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to the potential of precise forming and customization to individualized projects, magnetic components can be created in a wide range of shapes and sizes, which amplifies use scope,
Huge importance in electronics industry – they serve a role in hard drives, motor assemblies, diagnostic systems, and modern systems.
Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in miniature devices

Disadvantages

Cons of neodymium magnets: application proposals

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a strong case, which not only protects them against impacts but also increases their 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
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
We suggest cover - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated shapes.
Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. It is also worth noting that small components of these devices are able to be problematic in diagnostics medical in case of swallowing.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

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

Magnet power was determined for the most favorable conditions, assuming:

on a plate made of structural steel, optimally conducting the magnetic field
possessing a massiveness of min. 10 mm to ensure full flux closure
characterized by smoothness
without the slightest insulating layer between the magnet and steel
during detachment in a direction perpendicular to the mounting surface
in neutral thermal conditions

Lifting capacity in practice – influencing factors

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

Clearance – existence of foreign body (paint, dirt, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
Plate thickness – too thin sheet causes magnetic saturation, causing part of the power to be escaped into the air.
Metal type – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
Smoothness – ideal contact is obtained only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity was measured by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet and the plate reduces the lifting capacity.

H&S for magnets

Hand protection

Danger of trauma: The pulling power is so immense that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.

Medical implants

Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Operating temperature

Keep cool. NdFeB magnets are sensitive to temperature. If you require operation above 80°C, ask us about HT versions (H, SH, UH).

Fire warning

Machining of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Electronic devices

Do not bring magnets near a wallet, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

Magnetic interference

An intense magnetic field interferes with the functioning of compasses in smartphones and GPS navigation. Keep magnets near a device to avoid damaging the sensors.

Caution required

Before starting, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Allergy Warning

A percentage of the population suffer from a sensitization to Ni, which is the typical protective layer for neodymium magnets. Extended handling may cause an allergic reaction. We suggest use safety gloves.

Do not give to children

Neodymium magnets are not intended for children. Eating several magnets can lead to them pinching intestinal walls, which poses a severe health hazard and necessitates immediate surgery.

Fragile material

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Safety First! Need more info? Read our article: Are neodymium magnets dangerous?

MP 40x20x5 / N38 - ring magnet

Product card - MP 40x20x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the assembly - data

Table 1: Static force (pull vs distance) - interaction chart MP 40x20x5 / N38

Table 2: Sliding capacity (wall) MP 40x20x5 / N38

Table 3: Wall mounting (shearing) - vertical pull MP 40x20x5 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MP 40x20x5 / N38

Table 5: Thermal stability (stability) - resistance threshold MP 40x20x5 / N38

Table 6: Two magnets (repulsion) - field collision MP 40x20x5 / N38

Table 7: Hazards (electronics) - warnings MP 40x20x5 / N38

Table 8: Dynamics (kinetic energy) - collision effects MP 40x20x5 / N38

Table 9: Corrosion resistance MP 40x20x5 / N38

Table 10: Construction data (Pc) MP 40x20x5 / N38

Table 11: Hydrostatics and buoyancy MP 40x20x5 / N38

1. Vertical hold

2. Plate thickness effect

3. Power loss vs temp

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

Material specification

Sustainability

Force (pull)

Magnetic Induction

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Advantages as well as disadvantages of Nd2Fe14B magnets.

Advantages

Disadvantages

Pull force analysis

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

Lifting capacity in practice – influencing factors

H&S for magnets

Hand protection

Medical implants

Operating temperature

Fire warning

Electronic devices

Magnetic interference

Caution required

Allergy Warning

Do not give to children

Fragile material

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - interaction chart
MP 40x20x5 / N38

Table 2: Sliding capacity (wall)
MP 40x20x5 / N38

Table 3: Wall mounting (shearing) - vertical pull
MP 40x20x5 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 40x20x5 / N38

Table 5: Thermal stability (stability) - resistance threshold
MP 40x20x5 / N38

Table 6: Two magnets (repulsion) - field collision
MP 40x20x5 / N38

Table 7: Hazards (electronics) - warnings
MP 40x20x5 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MP 40x20x5 / N38

Table 9: Corrosion resistance
MP 40x20x5 / N38

Table 10: Construction data (P_c)
MP 40x20x5 / N38

Table 11: Hydrostatics and buoyancy
MP 40x20x5 / N38

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.