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MW 20x2.5 / N38 - cylindrical 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

cylindrical magnet

Catalog no 010042

GTIN/EAN: 5906301810414

5.00

Diameter Ø

20 mm [±0,1 mm]

Height

2.5 mm [±0,1 mm]

Weight

5.89 g

Magnetization Direction

↑ axial

Load capacity

2.41 kg / 23.65 N

Magnetic Induction

150.34 mT / 1503 Gs

Coating

[NiCuNi] Nickel

technical parameters »

2.51 ZŁ with VAT / pcs + price for transport

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Technical - MW 20x2.5 / N38 - cylindrical magnet

Specification / characteristics - MW 20x2.5 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010042
GTIN/EAN	5906301810414
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 Ø	20 mm [±0,1 mm]
Height	2.5 mm [±0,1 mm]
Weight	5.89 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.41 kg / 23.65 N
Magnetic Induction ~ ?	150.34 mT / 1503 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x2.5 / N38 - cylindrical 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 assembly - data

Presented information are the outcome of a engineering analysis. Results rely on models for the class Nd₂Fe₁₄B. Operational performance might slightly differ. Treat these data as a supplementary guide during assembly planning.

Table 1: Static force (force vs gap) - interaction chart
MW 20x2.5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1503 Gs 150.3 mT	2.41 kg / 5.31 LBS 2410.0 g / 23.6 N	warning
1 mm	1431 Gs 143.1 mT	2.18 kg / 4.82 LBS 2184.9 g / 21.4 N	warning
2 mm	1328 Gs 132.8 mT	1.88 kg / 4.15 LBS 1882.0 g / 18.5 N	low risk
3 mm	1206 Gs 120.6 mT	1.55 kg / 3.42 LBS 1552.2 g / 15.2 N	low risk
5 mm	947 Gs 94.7 mT	0.96 kg / 2.11 LBS 957.1 g / 9.4 N	low risk
10 mm	457 Gs 45.7 mT	0.22 kg / 0.49 LBS 223.1 g / 2.2 N	low risk
15 mm	224 Gs 22.4 mT	0.05 kg / 0.12 LBS 53.7 g / 0.5 N	low risk
20 mm	120 Gs 12.0 mT	0.02 kg / 0.03 LBS 15.4 g / 0.2 N	low risk
30 mm	44 Gs 4.4 mT	0.00 kg / 0.00 LBS 2.1 g / 0.0 N	low risk
50 mm	11 Gs 1.1 mT	0.00 kg / 0.00 LBS 0.1 g / 0.0 N	low risk

Grip strength decreases drastically with every subsequent millimeter of distance. Remember that even a microscopic distance (e.g., contamination, varnish, veneer) significantly reduces the pull force. Neodymiums work most effectively during direct contact; air break drastically cuts the force. Notice how rapidly the load capacity drop, when the magnet does not adhere directly to the metal substrate. When calculating the mounting, avoid additional spacers.

Table 2: Sliding force (wall)
MW 20x2.5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.48 kg / 1.06 LBS 482.0 g / 4.7 N
1 mm	Stal (~0.2)	0.44 kg / 0.96 LBS 436.0 g / 4.3 N
2 mm	Stal (~0.2)	0.38 kg / 0.83 LBS 376.0 g / 3.7 N
3 mm	Stal (~0.2)	0.31 kg / 0.68 LBS 310.0 g / 3.0 N
5 mm	Stal (~0.2)	0.19 kg / 0.42 LBS 192.0 g / 1.9 N
10 mm	Stal (~0.2)	0.04 kg / 0.10 LBS 44.0 g / 0.4 N
15 mm	Stal (~0.2)	0.01 kg / 0.02 LBS 10.0 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

The table below presents the approximate weight limit required to start the slippage of the magnet vertically against a upright steel wall (considering typical friction). This value varies with the distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 20x2.5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.72 kg / 1.59 LBS 723.0 g / 7.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.48 kg / 1.06 LBS 482.0 g / 4.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.24 kg / 0.53 LBS 241.0 g / 2.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.21 kg / 2.66 LBS 1205.0 g / 11.8 N

When hanging a holder on a vertical wall (e.g., a car body), it will only hold only approx. 20%-30% of nominal attraction strength. Gravitational force and a weak degree of grip influence the fact that holders move down faster than they pop off the substrate. Planning a wall mount? Note that the shear force is significantly lower than the perpendicular breakaway force. On a slippery surface, the element will slide down under a noticeably lighter load. Application of an anti-slip layer can significantly improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 20x2.5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.24 kg / 0.53 LBS 241.0 g / 2.4 N
1 mm	25%	0.60 kg / 1.33 LBS 602.5 g / 5.9 N
2 mm	50%	1.21 kg / 2.66 LBS 1205.0 g / 11.8 N
3 mm	75%	1.81 kg / 3.98 LBS 1807.5 g / 17.7 N
5 mm	100%	2.41 kg / 5.31 LBS 2410.0 g / 23.6 N
10 mm	100%	2.41 kg / 5.31 LBS 2410.0 g / 23.6 N
11 mm	100%	2.41 kg / 5.31 LBS 2410.0 g / 23.6 N
12 mm	100%	2.41 kg / 5.31 LBS 2410.0 g / 23.6 N

A too thin steel is unable to focus the entire magnetic field, which squanders power of the holder. Should you install a neodymium to a thin surface, the flux will penetrate right through and the holding will be smaller. To achieve 100% of this magnet's power, you require a sufficiently solid element of steel. The material oversaturation means that on thin elements (e.g., car bodies), the magnet holds weaker. We suggest choosing the steel dimension based on the following data.

Table 5: Thermal resistance (material behavior) - thermal limit
MW 20x2.5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	2.41 kg / 5.31 LBS 2410.0 g / 23.6 N	OK
40 °C	-2.2%	2.36 kg / 5.20 LBS 2357.0 g / 23.1 N	OK
60 °C	-4.4%	2.30 kg / 5.08 LBS 2304.0 g / 22.6 N
80 °C	-6.6%	2.25 kg / 4.96 LBS 2250.9 g / 22.1 N
100 °C	-28.8%	1.72 kg / 3.78 LBS 1715.9 g / 16.8 N

Ordinary NdFeB products irreversibly lose power past the thermal threshold. Avoid high temperatures – heat can permanently destroy this magnet. As the temperature rises, the magnet's force temporarily lowers. Refrain from using this magnet close to heaters higher than its safe range. Ignoring the limit will cause destruction of magnetic properties.

*Engineering note: Thermal stability is determined by both grade, as well as the dimension ratios. Flat magnets (pancake types) risk losing magnetic properties under lower heat stress than taller cylinders. Warning indicator in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - field collision
MW 20x2.5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	4.38 kg / 9.65 LBS 2 771 Gs	0.66 kg / 1.45 LBS 656 g / 6.4 N	N/A
1 mm	4.20 kg / 9.25 LBS 2 944 Gs	0.63 kg / 1.39 LBS 629 g / 6.2 N	3.78 kg / 8.33 LBS ~0 Gs
2 mm	3.97 kg / 8.75 LBS 2 862 Gs	0.60 kg / 1.31 LBS 595 g / 5.8 N	3.57 kg / 7.87 LBS ~0 Gs
3 mm	3.70 kg / 8.17 LBS 2 766 Gs	0.56 kg / 1.22 LBS 556 g / 5.5 N	3.33 kg / 7.35 LBS ~0 Gs
5 mm	3.12 kg / 6.88 LBS 2 538 Gs	0.47 kg / 1.03 LBS 468 g / 4.6 N	2.81 kg / 6.19 LBS ~0 Gs
10 mm	1.74 kg / 3.83 LBS 1 895 Gs	0.26 kg / 0.57 LBS 261 g / 2.6 N	1.56 kg / 3.45 LBS ~0 Gs
20 mm	0.41 kg / 0.89 LBS 915 Gs	0.06 kg / 0.13 LBS 61 g / 0.6 N	0.36 kg / 0.80 LBS ~0 Gs
50 mm	0.01 kg / 0.02 LBS 140 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 88 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 / 0.00 LBS 58 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 29 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 attract each other from a significantly greater distance 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? Utilize two neodymiums instead of one magnet and a steel. Be careful that when connecting a pair of magnets, the impact force is huge. The levitation is a bit weaker than the attraction, but still significant.
*Flux density for N-N configuration is approximately ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
Important: Figures apply to sliding force of a pair of matching magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - warnings
MW 20x2.5 / 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
Timepiece	20 Gs (2.0 mT)	4.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	3.5 cm
Car key	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

Powerful magnet radiation is a serious hazard to electronics and pacemakers. These NdFeB products generate a flux that prevents correct functioning of sensitive medical devices. Notice: the unseen radiation passes through tissues and glass. Increased vigilance must be exercised by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - collision effects
MW 20x2.5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	21.55 km/h (5.99 m/s)	0.11 J
30 mm	35.35 km/h (9.82 m/s)	0.28 J
50 mm	45.62 km/h (12.67 m/s)	0.47 J
100 mm	64.51 km/h (17.92 m/s)	0.95 J

Magnetic elements are prone to chipping – a violent impact against metal causes immediate chipping. Watch the impact speed – a neodymium left loose becomes dangerous. Kinetic force can trigger coating fragments or injury to fingers. Be sure to control the product during installation 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 working with large magnets.

Table 9: Anti-corrosion coating durability
MW 20x2.5 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (P_c)
MW 20x2.5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	5 996 Mx	60.0 µWb
P_c Coefficient	0.19	Low (Flat)

Flux value passing through the pole surface. Key data when building generators and motors. P_c value determines the magnet's operating point.

Table 11: Submerged application
MW 20x2.5 / N38

Environment	Effective steel pull	Effect
Air (land)	2.41 kg	Standard
Water (riverbed)	2.76 kg (+0.35 kg buoyancy gain)	+14.5%

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

Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Note: On a vertical wall, the magnet retains merely ~20% of its max power.

2. Steel thickness impact

*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.

3. Temperature resistance

*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) = 0.19

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 specification and ecology

Chemical composition

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: 010042-2026

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MW 6x6 / N38 - cylindrical magnet

0.677 ZŁ brutto / pcs

The offered product is a very strong rod magnet, manufactured from advanced NdFeB material, which, at dimensions of Ø20x2.5 mm, guarantees optimal power. The MW 20x2.5 / N38 component features a tolerance of ±0.1mm and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 2.41 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 23.65 N with a weight of only 5.89 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.

Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.

Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø20x2.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.

This model is characterized by dimensions Ø20x2.5 mm, which, at a weight of 5.89 g, makes it an element with high magnetic energy density. The value of 23.65 N means that the magnet is capable of holding a weight many times exceeding its own mass of 5.89 g. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.

This rod magnet is magnetized axially (along the height of 2.5 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Pros as well as cons of Nd₂Fe₁₄B magnets.

Benefits

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

Their strength remains stable, and after around ten years it decreases only by ~1% (theoretically),
Magnets effectively resist against loss of magnetization caused by foreign field sources,
By applying a lustrous layer of gold, the element has an modern look,
They show high magnetic induction at the operating surface, which increases their power,
Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
Thanks to freedom in designing and the capacity to customize to complex applications,
Fundamental importance in future technologies – they serve a role in magnetic memories, electromotive mechanisms, precision medical tools, and modern systems.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in compact constructions

Disadvantages

Disadvantages of NdFeB magnets:

At very strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power 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
Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
We recommend a housing - magnetic mount, due to difficulties in producing threads inside the magnet and complicated shapes.
Potential hazard to health – tiny shards of magnets are risky, if swallowed, which gains importance in the context of child safety. Additionally, small elements of these magnets are able to disrupt the diagnostic process medical after entering the body.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

The declared magnet strength refers to the maximum value, obtained under laboratory conditions, namely:

using a plate made of high-permeability steel, functioning as a circuit closing element
whose transverse dimension is min. 10 mm
characterized by lack of roughness
without any clearance between the magnet and steel
under vertical force vector (90-degree angle)
at ambient temperature room level

Impact of factors on magnetic holding capacity in practice

Holding efficiency is influenced by working environment parameters, mainly (from most important):

Clearance – the presence of any layer (paint, dirt, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Steel type – low-carbon steel attracts best. Alloy admixtures reduce magnetic properties and lifting capacity.
Surface finish – ideal contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was measured by applying a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate decreases the load capacity.

Safety rules for work with NdFeB magnets

Life threat

For implant holders: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or request help to handle the magnets.

Bone fractures

Watch your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Protect data

Avoid bringing magnets close to a wallet, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.

This is not a toy

Only for adults. Small elements can be swallowed, causing intestinal necrosis. Store out of reach of kids and pets.

Safe operation

Use magnets with awareness. Their immense force can surprise even professionals. Plan your moves and do not underestimate their power.

Impact on smartphones

Navigation devices and mobile phones are extremely sensitive to magnetism. Close proximity with a strong magnet can ruin the internal compass in your phone.

Power loss in heat

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Allergic reactions

Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, avoid direct skin contact or select encased magnets.

Beware of splinters

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Do not drill into magnets

Fire warning: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

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

MW 20x2.5 / N38 - cylindrical magnet

Technical - MW 20x2.5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the assembly - data

Table 1: Static force (force vs gap) - interaction chart MW 20x2.5 / N38

Table 2: Sliding force (wall) MW 20x2.5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MW 20x2.5 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MW 20x2.5 / N38

Table 5: Thermal resistance (material behavior) - thermal limit MW 20x2.5 / N38

Table 6: Two magnets (repulsion) - field collision MW 20x2.5 / N38

Table 7: Hazards (implants) - warnings MW 20x2.5 / N38

Table 8: Impact energy (cracking risk) - collision effects MW 20x2.5 / N38

Table 9: Anti-corrosion coating durability MW 20x2.5 / N38

Table 10: Construction data (Pc) MW 20x2.5 / N38

Table 11: Submerged application MW 20x2.5 / N38

1. Wall mount (shear)

2. Steel thickness impact

3. Temperature resistance

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

Chemical composition

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Field

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Pros as well as cons of Nd2Fe14B magnets.

Benefits

Disadvantages

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

Impact of factors on magnetic holding capacity in practice

Safety rules for work with NdFeB magnets

Life threat

Bone fractures

Protect data

This is not a toy

Safe operation

Impact on smartphones

Power loss in heat

Allergic reactions

Beware of splinters

Do not drill into magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - interaction chart
MW 20x2.5 / N38

Table 2: Sliding force (wall)
MW 20x2.5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 20x2.5 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MW 20x2.5 / N38

Table 5: Thermal resistance (material behavior) - thermal limit
MW 20x2.5 / N38

Table 6: Two magnets (repulsion) - field collision
MW 20x2.5 / N38

Table 7: Hazards (implants) - warnings
MW 20x2.5 / N38

Table 8: Impact energy (cracking risk) - collision effects
MW 20x2.5 / N38

Table 9: Anti-corrosion coating durability
MW 20x2.5 / N38

Table 10: Construction data (P_c)
MW 20x2.5 / N38

Table 11: Submerged application
MW 20x2.5 / N38

Pros as well as cons of Nd₂Fe₁₄B magnets.