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MW 20x5 / 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 010044

GTIN/EAN: 5906301810438

5.00

Diameter Ø

20 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

11.78 g

Magnetization Direction

↑ axial

Load capacity

6.93 kg / 67.95 N

Magnetic Induction

277.16 mT / 2772 Gs

Coating

[NiCuNi] Nickel

check parameters »

5.56 ZŁ with VAT / pcs + price for transport

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Technical of the product - MW 20x5 / N38 - cylindrical magnet

Specification / characteristics - MW 20x5 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010044
GTIN/EAN	5906301810438
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	5 mm [±0,1 mm]
Weight	11.78 g
Magnetization Direction	↑ axial
Load capacity ~ ?	6.93 kg / 67.95 N
Magnetic Induction ~ ?	277.16 mT / 2772 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x5 / 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

Engineering analysis of the magnet - technical parameters

These information represent the result of a physical calculation. Values are based on models for the class Nd₂Fe₁₄B. Real-world conditions may differ from theoretical values. Treat these calculations as a supplementary guide when designing systems.

Table 1: Static force (force vs gap) - power drop
MW 20x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2771 Gs 277.1 mT	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N	medium risk
1 mm	2573 Gs 257.3 mT	5.97 kg / 13.17 pounds 5975.0 g / 58.6 N	medium risk
2 mm	2340 Gs 234.0 mT	4.94 kg / 10.89 pounds 4940.1 g / 48.5 N	medium risk
3 mm	2092 Gs 209.2 mT	3.95 kg / 8.70 pounds 3948.3 g / 38.7 N	medium risk
5 mm	1611 Gs 161.1 mT	2.34 kg / 5.17 pounds 2343.4 g / 23.0 N	medium risk
10 mm	775 Gs 77.5 mT	0.54 kg / 1.19 pounds 541.6 g / 5.3 N	low risk
15 mm	387 Gs 38.7 mT	0.13 kg / 0.30 pounds 135.0 g / 1.3 N	low risk
20 mm	211 Gs 21.1 mT	0.04 kg / 0.09 pounds 40.2 g / 0.4 N	low risk
30 mm	80 Gs 8.0 mT	0.01 kg / 0.01 pounds 5.7 g / 0.1 N	low risk
50 mm	20 Gs 2.0 mT	0.00 kg / 0.00 pounds 0.4 g / 0.0 N	low risk

Pulling power drops drastically per each millimeter of spacing. Keep in mind that even a microscopic distance (e.g., contamination, paint, veneer) noticeably reduces the pull force. Neodymiums work optimally during direct contact; gap nullifies the force. See how quickly the load capacity drop, when the magnet does not adhere directly to the metal substrate. When planning the arrangement, avoid redundant distances.

Table 2: Slippage hold (wall)
MW 20x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.39 kg / 3.06 pounds 1386.0 g / 13.6 N
1 mm	Stal (~0.2)	1.19 kg / 2.63 pounds 1194.0 g / 11.7 N
2 mm	Stal (~0.2)	0.99 kg / 2.18 pounds 988.0 g / 9.7 N
3 mm	Stal (~0.2)	0.79 kg / 1.74 pounds 790.0 g / 7.7 N
5 mm	Stal (~0.2)	0.47 kg / 1.03 pounds 468.0 g / 4.6 N
10 mm	Stal (~0.2)	0.11 kg / 0.24 pounds 108.0 g / 1.1 N
15 mm	Stal (~0.2)	0.03 kg / 0.06 pounds 26.0 g / 0.3 N
20 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

This section calculates the theoretical shear load required to initiate the sliding of the magnet downwards against a upright steel wall (assuming standard friction coefficient). This parameter is relative to the distance between the magnet and the surface.

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

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.08 kg / 4.58 pounds 2079.0 g / 20.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.39 kg / 3.06 pounds 1386.0 g / 13.6 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.69 kg / 1.53 pounds 693.0 g / 6.8 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.47 kg / 7.64 pounds 3465.0 g / 34.0 N

When mounting a element on a upright plane (e.g., a fridge), it you can count on just about 20%-30% of its maximum pull force. Gravitational force and a low friction coefficient cause that holders slip faster than they pull off. Planning a wall mount? Note that the sliding force is much weaker than the maximum static pull force. On a painted metal, the magnet will slip down under a noticeably lighter weight. Using a rubber pad can effectively improve the result.

Table 4: Material efficiency (saturation) - power losses
MW 20x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.69 kg / 1.53 pounds 693.0 g / 6.8 N
1 mm	25%	1.73 kg / 3.82 pounds 1732.5 g / 17.0 N
2 mm	50%	3.47 kg / 7.64 pounds 3465.0 g / 34.0 N
3 mm	75%	5.20 kg / 11.46 pounds 5197.5 g / 51.0 N
5 mm	100%	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N
10 mm	100%	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N
11 mm	100%	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N
12 mm	100%	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N

A thin metal plate is not enough to take in the entire magnetic field, which squanders power of the holder. If you attach a powerful product to a too thin substrate, the field will penetrate right through and the holding will be smaller. To achieve the maximum of this magnet's potential, you need a suitably thick backing of steel. The saturation effect causes that on thin elements (e.g., thin profiles), the magnet holds weaker. We suggest choosing the steel dimension from these parameters.

Table 5: Working in heat (material behavior) - thermal limit
MW 20x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N	OK
40 °C	-2.2%	6.78 kg / 14.94 pounds 6777.5 g / 66.5 N	OK
60 °C	-4.4%	6.63 kg / 14.61 pounds 6625.1 g / 65.0 N
80 °C	-6.6%	6.47 kg / 14.27 pounds 6472.6 g / 63.5 N
100 °C	-28.8%	4.93 kg / 10.88 pounds 4934.2 g / 48.4 N

Ordinary NdFeB products irreversibly lose strength above the temperature limit. Watch out for overheating – excessive heat can permanently destroy this product. With every degree above norm, the neodymium's power temporarily drops. Refrain from using this magnet close to heaters exceeding its operating temperature limit. Exceeding the critical threshold will cause irreversible degradation of magnetism.

*Technical advisory: Thermal stability depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low Pc) are more susceptible to demagnetization under lower heat stress than long magnets. The danger warning in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 20x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	14.87 kg / 32.79 pounds 4 380 Gs	2.23 kg / 4.92 pounds 2231 g / 21.9 N	N/A
1 mm	13.89 kg / 30.63 pounds 5 357 Gs	2.08 kg / 4.59 pounds 2084 g / 20.4 N	12.50 kg / 27.57 pounds ~0 Gs
2 mm	12.82 kg / 28.27 pounds 5 146 Gs	1.92 kg / 4.24 pounds 1923 g / 18.9 N	11.54 kg / 25.44 pounds ~0 Gs
3 mm	11.71 kg / 25.82 pounds 4 918 Gs	1.76 kg / 3.87 pounds 1757 g / 17.2 N	10.54 kg / 23.24 pounds ~0 Gs
5 mm	9.51 kg / 20.97 pounds 4 433 Gs	1.43 kg / 3.15 pounds 1427 g / 14.0 N	8.56 kg / 18.88 pounds ~0 Gs
10 mm	5.03 kg / 11.09 pounds 3 223 Gs	0.75 kg / 1.66 pounds 754 g / 7.4 N	4.53 kg / 9.98 pounds ~0 Gs
20 mm	1.16 kg / 2.56 pounds 1 549 Gs	0.17 kg / 0.38 pounds 174 g / 1.7 N	1.05 kg / 2.31 pounds ~0 Gs
50 mm	0.03 kg / 0.07 pounds 251 Gs	0.00 kg / 0.01 pounds 5 g / 0.0 N	0.03 kg / 0.06 pounds ~0 Gs
60 mm	0.01 kg / 0.03 pounds 159 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.02 pounds ~0 Gs
70 mm	0.01 kg / 0.01 pounds 107 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.01 pounds 75 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.00 pounds 54 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 41 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two strong neodymiums attract each other from a significantly greater distance than a neodymium and metal combination. The setup of two magnets creates a more powerful interaction and a further horizon of action. Planning to create a strong closure? Utilize two neodymiums instead of one magnet and a striker plate. Remember that when bringing together two magnets, the collision energy is huge. The repulsion force is a bit weaker than the attraction, but still impressive.
*Field value in repulsion mode drops to ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
* Estimates apply to shear force of two same magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
MW 20x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	8.5 cm
Hearing aid	10 Gs (1.0 mT)	6.5 cm
Mechanical watch	20 Gs (2.0 mT)	5.5 cm
Mobile device	40 Gs (4.0 mT)	4.0 cm
Car key	50 Gs (5.0 mT)	4.0 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 poses a serious hazard to electronics and medical implants. These NdFeB products produce a flux that prevents correct functioning of digital equipment. Remember: the invisible magnetic field acts through matter and plastic. Special caution must be exercised by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MW 20x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	25.63 km/h (7.12 m/s)	0.30 J
30 mm	42.39 km/h (11.77 m/s)	0.82 J
50 mm	54.70 km/h (15.19 m/s)	1.36 J
100 mm	77.35 km/h (21.49 m/s)	2.72 J

NdFeB products are prone to chipping – a violent impact against metal risks their cracking. Watch the impact speed – a magnet released freely speeds with massive force. Striking energy can cause material chips or injury to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Use safety goggles when working with powerful specimens.

Table 9: Coating parameters (durability)
MW 20x5 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (P_c)
MW 20x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	9 675 Mx	96.7 µWb
P_c Coefficient	0.35	Low (Flat)

Total magnetic flux passing through the pole surface. Essential parameter when building generators as well as sensors. P_c value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MW 20x5 / N38

Environment	Effective steel pull	Effect
Air (land)	6.93 kg	Standard
Water (riverbed)	7.93 kg (+1.00 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!

The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Caution: On a vertical wall, the magnet retains just approx. 20-30% of its perpendicular strength.

2. Steel saturation

*Thin steel (e.g. computer case) drastically limits the holding force.

3. Power loss vs temp

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.35

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%

Environmental data

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: 010044-2026

Magnet Unit Converter

Force (pull)

Kilograms (kg)

Force in lbs

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Induction (T)

Input a figure in just one field to see the conversion in all other units right away.

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MW 70x40 / N38 - cylindrical magnet

395.40 ZŁ brutto / pcs

This product is a very strong cylindrical magnet, manufactured from modern NdFeB material, which, at dimensions of Ø20x5 mm, guarantees the highest energy density. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 6.93 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is created for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 67.95 N with a weight of only 11.78 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.

Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Magnets N38 are strong enough for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø20x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.

This model is characterized by dimensions Ø20x5 mm, which, at a weight of 11.78 g, makes it an element with high magnetic energy density. The value of 67.95 N means that the magnet is capable of holding a weight many times exceeding its own mass of 11.78 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.

This cylinder is magnetized axially (along the height of 5 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized through the diameter if your project requires it.

Strengths and weaknesses of neodymium magnets.

Pros

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

They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (according to literature),
They show high resistance to demagnetization induced by external magnetic fields,
The use of an refined finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
Magnetic induction on the working part of the magnet is very high,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to flexibility in constructing and the capacity to customize to client solutions,
Universal use in modern industrial fields – they are used in HDD drives, electromotive mechanisms, diagnostic systems, also modern systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

What to avoid - cons of neodymium magnets: weaknesses and usage proposals

To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 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 and corrosion.
Limited ability of making threads in the magnet and complicated forms - preferred is casing - magnetic holder.
Possible danger related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
Due to expensive raw materials, their price is relatively high,

Pull force analysis

Highest magnetic holding force – what affects it?

The force parameter is a theoretical maximum value conducted under the following configuration:

on a block made of mild steel, perfectly concentrating the magnetic field
possessing a massiveness of minimum 10 mm to avoid saturation
with an ground touching surface
without any insulating layer between the magnet and steel
during pulling in a direction vertical to the mounting surface
at temperature room level

Practical aspects of lifting capacity – factors

Please note that the working load may be lower influenced by elements below, in order of importance:

Distance (betwixt the magnet and the plate), as even a very small distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
Steel type – mild steel gives the best results. Alloy admixtures decrease magnetic properties and lifting capacity.
Smoothness – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Safe handling of neodymium magnets

Nickel coating and allergies

Studies show that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, refrain from direct skin contact and choose versions in plastic housing.

Adults only

These products are not intended for children. Swallowing several magnets can lead to them pinching intestinal walls, which poses a severe health hazard and requires urgent medical intervention.

Cards and drives

Device Safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).

Mechanical processing

Dust generated during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Bone fractures

Protect your hands. Two large magnets will join instantly with a force of massive weight, destroying anything in their path. Be careful!

GPS Danger

A powerful magnetic field interferes with the functioning of magnetometers in phones and GPS navigation. Do not bring magnets close to a device to avoid breaking the sensors.

Beware of splinters

Watch out for shards. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Medical implants

Individuals with a pacemaker should keep an large gap from magnets. The magnetic field can disrupt the operation of the life-saving device.

Respect the power

Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.

Operating temperature

Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.

Caution! Details about hazards in the article: Magnet Safety Guide.

MW 20x5 / N38 - cylindrical magnet

Technical of the product - MW 20x5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the magnet - technical parameters

Table 1: Static force (force vs gap) - power drop MW 20x5 / N38

Table 2: Slippage hold (wall) MW 20x5 / N38

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

Table 4: Material efficiency (saturation) - power losses MW 20x5 / N38

Table 5: Working in heat (material behavior) - thermal limit MW 20x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision MW 20x5 / N38

Table 7: Protective zones (implants) - warnings MW 20x5 / N38

Table 8: Collisions (kinetic energy) - collision effects MW 20x5 / N38

Table 9: Coating parameters (durability) MW 20x5 / N38

Table 10: Electrical data (Pc) MW 20x5 / N38

Table 11: Underwater work (magnet fishing) MW 20x5 / N38

1. Shear force

2. Steel saturation

3. Power loss vs temp

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

Elemental analysis

Environmental data

Force (pull)

Field Strength

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MW 70x40 / N38 - cylindrical magnet

Strengths and weaknesses of neodymium magnets.

Pros

Disadvantages

Pull force analysis

Highest magnetic holding force – what affects it?

Practical aspects of lifting capacity – factors

Safe handling of neodymium magnets

Nickel coating and allergies

Adults only

Cards and drives

Mechanical processing

Bone fractures

GPS Danger

Beware of splinters

Medical implants

Respect the power

Operating temperature

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - power drop
MW 20x5 / N38

Table 2: Slippage hold (wall)
MW 20x5 / N38

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

Table 4: Material efficiency (saturation) - power losses
MW 20x5 / N38

Table 5: Working in heat (material behavior) - thermal limit
MW 20x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 20x5 / N38

Table 7: Protective zones (implants) - warnings
MW 20x5 / N38

Table 8: Collisions (kinetic energy) - collision effects
MW 20x5 / N38

Table 9: Coating parameters (durability)
MW 20x5 / N38

Table 10: Electrical data (P_c)
MW 20x5 / N38

Table 11: Underwater work (magnet fishing)
MW 20x5 / N38