Product available Ships tomorrow

MW 20x18 / 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 010040

GTIN/EAN: 5906301810391

Diameter Ø

20 mm [±0,1 mm]

Height

18 mm [±0,1 mm]

Weight

42.41 g

Magnetization Direction

↑ axial

Load capacity

13.19 kg / 129.35 N

Magnetic Induction

541.64 mT / 5416 Gs

Coating

[NiCuNi] Nickel

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23.54 ZŁ with VAT / pcs + price for transport

19.14 ZŁ net + 23% VAT / pcs

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Technical data of the product - MW 20x18 / N38 - cylindrical magnet

Specification / characteristics - MW 20x18 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010040
GTIN/EAN	5906301810391
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	18 mm [±0,1 mm]
Weight	42.41 g
Magnetization Direction	↑ axial
Load capacity ~ ?	13.19 kg / 129.35 N
Magnetic Induction ~ ?	541.64 mT / 5416 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x18 / 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 analysis of the assembly - data

These data constitute the direct effect of a engineering simulation. Results were calculated on models for the class Nd₂Fe₁₄B. Real-world performance may differ from theoretical values. Treat these data as a reference point for designers.

Table 1: Static force (force vs gap) - characteristics
MW 20x18 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5414 Gs 541.4 mT	13.19 kg / 29.08 LBS 13190.0 g / 129.4 N	critical level
1 mm	4870 Gs 487.0 mT	10.67 kg / 23.52 LBS 10669.5 g / 104.7 N	critical level
2 mm	4330 Gs 433.0 mT	8.43 kg / 18.59 LBS 8434.2 g / 82.7 N	medium risk
3 mm	3816 Gs 381.6 mT	6.55 kg / 14.45 LBS 6552.7 g / 64.3 N	medium risk
5 mm	2913 Gs 291.3 mT	3.82 kg / 8.42 LBS 3818.4 g / 37.5 N	medium risk
10 mm	1455 Gs 145.5 mT	0.95 kg / 2.10 LBS 952.2 g / 9.3 N	safe
15 mm	775 Gs 77.5 mT	0.27 kg / 0.60 LBS 270.1 g / 2.7 N	safe
20 mm	450 Gs 45.0 mT	0.09 kg / 0.20 LBS 91.3 g / 0.9 N	safe
30 mm	188 Gs 18.8 mT	0.02 kg / 0.04 LBS 15.9 g / 0.2 N	safe
50 mm	54 Gs 5.4 mT	0.00 kg / 0.00 LBS 1.3 g / 0.0 N	safe

Magnetic force drops drastically with every subsequent millimeter of distance. Keep in mind that even a very thin break (e.g., dirt, varnish, rust) significantly diminishes the holding power. Magnets operate optimally during direct contact; distance drastically cuts the power. See how rapidly the load capacity plummet, when the magnet does not touch directly to the metal substrate. When designing the mounting, avoid unnecessary gaps.

Table 2: Shear force (wall)
MW 20x18 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	2.64 kg / 5.82 LBS 2638.0 g / 25.9 N
1 mm	Stal (~0.2)	2.13 kg / 4.70 LBS 2134.0 g / 20.9 N
2 mm	Stal (~0.2)	1.69 kg / 3.72 LBS 1686.0 g / 16.5 N
3 mm	Stal (~0.2)	1.31 kg / 2.89 LBS 1310.0 g / 12.9 N
5 mm	Stal (~0.2)	0.76 kg / 1.68 LBS 764.0 g / 7.5 N
10 mm	Stal (~0.2)	0.19 kg / 0.42 LBS 190.0 g / 1.9 N
15 mm	Stal (~0.2)	0.05 kg / 0.12 LBS 54.0 g / 0.5 N
20 mm	Stal (~0.2)	0.02 kg / 0.04 LBS 18.0 g / 0.2 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 LBS 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

The table below defines the theoretical shear load needed to start the slippage of the magnet downwards on a vertical steel wall (assuming typical friction). This value depends on the distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MW 20x18 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	3.96 kg / 8.72 LBS 3957.0 g / 38.8 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	2.64 kg / 5.82 LBS 2638.0 g / 25.9 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.32 kg / 2.91 LBS 1319.0 g / 12.9 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	6.60 kg / 14.54 LBS 6595.0 g / 64.7 N

When hanging a holder on a vertical plane (e.g., a car body), it you can count on barely approx. 1/5 of its nominal power. Gravitational force as well as a weak degree of grip influence the fact that magnets move down faster than they pull off. Planning a hanger? Remember that the shear force is much weaker than the perpendicular breakaway force. On a smooth steel, the element will slip down under a much lighter load. Using a rubber pad can significantly increase the grip.

Table 4: Material efficiency (saturation) - power losses
MW 20x18 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.66 kg / 1.45 LBS 659.5 g / 6.5 N
1 mm	13%	1.65 kg / 3.63 LBS 1648.8 g / 16.2 N
2 mm	25%	3.30 kg / 7.27 LBS 3297.5 g / 32.3 N
3 mm	38%	4.95 kg / 10.90 LBS 4946.3 g / 48.5 N
5 mm	63%	8.24 kg / 18.17 LBS 8243.8 g / 80.9 N
10 mm	100%	13.19 kg / 29.08 LBS 13190.0 g / 129.4 N
11 mm	100%	13.19 kg / 29.08 LBS 13190.0 g / 129.4 N
12 mm	100%	13.19 kg / 29.08 LBS 13190.0 g / 129.4 N

A thin sheet is unable to conduct the entire magnetic field, which wastes potential of the holder. Should you install a neodymium to a weak sheet, the magnetism will pass right through and the attraction force will be weaker. To achieve the maximum of this neodymium's potential, you need a suitably thick piece of steel. The material oversaturation causes that on sheet metal structures (e.g., car bodies), the product works worse. We recommend selecting the steel cross-section based on the following data.

Table 5: Thermal stability (material behavior) - thermal limit
MW 20x18 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	13.19 kg / 29.08 LBS 13190.0 g / 129.4 N	OK
40 °C	-2.2%	12.90 kg / 28.44 LBS 12899.8 g / 126.5 N	OK
60 °C	-4.4%	12.61 kg / 27.80 LBS 12609.6 g / 123.7 N	OK
80 °C	-6.6%	12.32 kg / 27.16 LBS 12319.5 g / 120.9 N
100 °C	-28.8%	9.39 kg / 20.70 LBS 9391.3 g / 92.1 N

Classic neodymiums irreversibly lose parameters after exceeding the maximum temperature. Avoid high temperatures – excessive heat can irreversibly demagnetize this product. With every degree above norm, the neodymium's capacity briefly drops. Do not use this product close to heaters higher than its working range. Too high temperature will lead to irreversible degradation of magnetism.

*Engineering note: Temperature resistance is determined by both grade, as well as the dimension ratios. Flat magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress than long magnets. Warning indicator in the table points to permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - forces in the system
MW 20x18 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	56.78 kg / 125.17 LBS 5 968 Gs	8.52 kg / 18.78 LBS 8516 g / 83.5 N	N/A
1 mm	51.26 kg / 113.01 LBS 10 289 Gs	7.69 kg / 16.95 LBS 7689 g / 75.4 N	46.13 kg / 101.71 LBS ~0 Gs
2 mm	45.93 kg / 101.25 LBS 9 739 Gs	6.89 kg / 15.19 LBS 6889 g / 67.6 N	41.33 kg / 91.13 LBS ~0 Gs
3 mm	40.93 kg / 90.24 LBS 9 194 Gs	6.14 kg / 13.54 LBS 6140 g / 60.2 N	36.84 kg / 81.22 LBS ~0 Gs
5 mm	32.06 kg / 70.68 LBS 8 137 Gs	4.81 kg / 10.60 LBS 4809 g / 47.2 N	28.86 kg / 63.62 LBS ~0 Gs
10 mm	16.44 kg / 36.24 LBS 5 826 Gs	2.47 kg / 5.44 LBS 2465 g / 24.2 N	14.79 kg / 32.61 LBS ~0 Gs
20 mm	4.10 kg / 9.04 LBS 2 909 Gs	0.61 kg / 1.36 LBS 615 g / 6.0 N	3.69 kg / 8.13 LBS ~0 Gs
50 mm	0.15 kg / 0.34 LBS 565 Gs	0.02 kg / 0.05 LBS 23 g / 0.2 N	0.14 kg / 0.31 LBS ~0 Gs
60 mm	0.07 kg / 0.15 LBS 376 Gs	0.01 kg / 0.02 LBS 10 g / 0.1 N	0.06 kg / 0.14 LBS ~0 Gs
70 mm	0.03 kg / 0.07 LBS 262 Gs	0.00 kg / 0.01 LBS 5 g / 0.0 N	0.03 kg / 0.07 LBS ~0 Gs
80 mm	0.02 kg / 0.04 LBS 190 Gs	0.00 kg / 0.01 LBS 3 g / 0.0 N	0.02 kg / 0.03 LBS ~0 Gs
90 mm	0.01 kg / 0.02 LBS 142 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
100 mm	0.01 kg / 0.01 LBS 109 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs

Two magnets interact from a significantly greater distance than a neodymium and metal combination. The connection of magnet-to-magnet produces a massive flux and a wider radius of performance. Planning to create a strong closure? Apply two magnets instead of one magnet and a striker plate. Remember that when bringing together two magnets, the pinch force is extreme. The repulsion force is slightly lower than the attraction, but still significant.
*Flux density in repulsion mode drops to ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Note: Results refer to shear force of dual identical magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - precautionary measures
MW 20x18 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	12.5 cm
Hearing aid	10 Gs (1.0 mT)	9.5 cm
Timepiece	20 Gs (2.0 mT)	7.5 cm
Mobile device	40 Gs (4.0 mT)	6.0 cm
Car key	50 Gs (5.0 mT)	5.5 cm
Payment card	400 Gs (40.0 mT)	2.5 cm
HDD hard drive	600 Gs (60.0 mT)	2.0 cm

Powerful magnet radiation is a real danger to IT equipment and medical implants. These NdFeB products produce a flux that prevents correct functioning of sensitive medical devices. Notice: the invisible magnetic field penetrates the body and plastic. Exceptional care must be exercised by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, car keys, speakers, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MW 20x18 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	18.57 km/h (5.16 m/s)	0.56 J
30 mm	30.83 km/h (8.56 m/s)	1.56 J
50 mm	39.77 km/h (11.05 m/s)	2.59 J
100 mm	56.24 km/h (15.62 m/s)	5.18 J

Magnetic elements are delicate – a collision with steel risks their cracking. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Striking energy can trigger coating fragments or dangerous crushing to skin. Be sure to control the product during installation so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear safety glasses when working with powerful specimens.

Table 9: Corrosion resistance
MW 20x18 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Note the thickness of the protective layer.

Table 10: Construction data (Flux)
MW 20x18 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	17 374 Mx	173.7 µWb
P_c Coefficient	0.85	High (Stable)

Total magnetic flux passing through the pole surface. Essential parameter in coil applications and motors. P_c value defines the working geometry.

Table 11: Physics of underwater searching
MW 20x18 / N38

Environment	Effective steel pull	Effect
Air (land)	13.19 kg	Standard
Water (riverbed)	15.10 kg (+1.91 kg buoyancy gain)	+14.5%

Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

In water, the magnet feels stronger thanks to Archimedes' principle. Buoyancy helps in lifting finds.

1. Shear force

*Warning: On a vertical wall, the magnet holds just approx. 20-30% of its nominal pull.

2. Efficiency vs thickness

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

3. Power loss vs temp

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.85

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.

Technical and environmental data

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: 010040-2026

Quick Unit Converter

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The offered product is an exceptionally strong rod magnet, composed of durable NdFeB material, which, with dimensions of Ø20x18 mm, guarantees the highest energy density. The MW 20x18 / N38 model features a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 13.19 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is perfect for building generators, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 129.35 N with a weight of only 42.41 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.

Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 20.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, 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 industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø20x18), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

This model is characterized by dimensions Ø20x18 mm, which, at a weight of 42.41 g, makes it an element with high magnetic energy density. The value of 129.35 N means that the magnet is capable of holding a weight many times exceeding its own mass of 42.41 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.

Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 20 mm. 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.

Advantages and disadvantages of rare earth magnets.

Advantages

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

They do not lose strength, even after around ten years – the decrease in strength is only ~1% (theoretically),
They are noted for resistance to demagnetization induced by external disturbances,
Thanks to the smooth finish, the coating of nickel, gold, or silver-plated gives an visually attractive appearance,
Magnets exhibit maximum magnetic induction on the working surface,
Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
Thanks to versatility in shaping and the capacity to modify to individual projects,
Wide application in advanced technology sectors – they find application in data components, drive modules, precision medical tools, as well as modern systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets: tips and applications.

At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
When exposed to high temperature, neodymium magnets suffer a drop in power. 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
When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
Due to limitations in creating threads and complex forms in magnets, we propose using a housing - magnetic mount.
Potential hazard resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these devices can be problematic in diagnostics medical in case of swallowing.
With mass production the cost of neodymium magnets is economically unviable,

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

The force parameter is a measurement result executed under standard conditions:

on a base made of mild steel, perfectly concentrating the magnetic flux
possessing a massiveness of at least 10 mm to ensure full flux closure
with a surface cleaned and smooth
without any air gap between the magnet and steel
during detachment in a direction perpendicular to the plane
in neutral thermal conditions

Practical lifting capacity: influencing factors

Real force impacted by working environment parameters, mainly (from priority):

Distance (betwixt the magnet and the plate), since even a tiny distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
Load vector – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
Metal type – different alloys attracts identically. Alloy additives weaken the attraction effect.
Smoothness – ideal contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under shearing force the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

H&S for magnets

Impact on smartphones

Note: neodymium magnets generate a field that confuses precision electronics. Keep a separation from your mobile, tablet, and navigation systems.

Threat to electronics

Equipment safety: Neodymium magnets can damage data carriers and sensitive devices (heart implants, medical aids, timepieces).

Fire warning

Powder produced during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Medical interference

Individuals with a heart stimulator have to maintain an absolute distance from magnets. The magnetism can interfere with the operation of the implant.

Heat sensitivity

Standard neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

Warning for allergy sufferers

It is widely known that nickel (standard magnet coating) is a strong allergen. If you have an allergy, avoid direct skin contact and choose encased magnets.

Crushing risk

Big blocks can crush fingers in a fraction of a second. Never place your hand between two attracting surfaces.

Swallowing risk

Always keep magnets away from children. Choking hazard is significant, and the effects of magnets connecting inside the body are fatal.

Handling rules

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

Eye protection

Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

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

MW 20x18 / N38 - cylindrical magnet

Technical data of the product - MW 20x18 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical analysis of the assembly - data

Table 1: Static force (force vs gap) - characteristics MW 20x18 / N38

Table 2: Shear force (wall) MW 20x18 / N38

Table 3: Vertical assembly (sliding) - vertical pull MW 20x18 / N38

Table 4: Material efficiency (saturation) - power losses MW 20x18 / N38

Table 5: Thermal stability (material behavior) - thermal limit MW 20x18 / N38

Table 6: Two magnets (repulsion) - forces in the system MW 20x18 / N38

Table 7: Protective zones (implants) - precautionary measures MW 20x18 / N38

Table 8: Dynamics (cracking risk) - collision effects MW 20x18 / N38

Table 9: Corrosion resistance MW 20x18 / N38

Table 10: Construction data (Flux) MW 20x18 / N38

Table 11: Physics of underwater searching MW 20x18 / N38

1. Shear force

2. Efficiency vs thickness

3. Power loss vs temp

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

Chemical composition

Ecology and recycling (GPSR)

Pulling force

Magnetic Field

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MW 12x2 / N38 - cylindrical magnet

Advantages and disadvantages of rare earth magnets.

Advantages

Cons

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

Practical lifting capacity: influencing factors

H&S for magnets

Impact on smartphones

Threat to electronics

Fire warning

Medical interference

Heat sensitivity

Warning for allergy sufferers

Crushing risk

Swallowing risk

Handling rules

Eye protection

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - characteristics
MW 20x18 / N38

Table 2: Shear force (wall)
MW 20x18 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MW 20x18 / N38

Table 4: Material efficiency (saturation) - power losses
MW 20x18 / N38

Table 5: Thermal stability (material behavior) - thermal limit
MW 20x18 / N38

Table 6: Two magnets (repulsion) - forces in the system
MW 20x18 / N38

Table 7: Protective zones (implants) - precautionary measures
MW 20x18 / N38

Table 8: Dynamics (cracking risk) - collision effects
MW 20x18 / N38

Table 9: Corrosion resistance
MW 20x18 / N38

Table 10: Construction data (Flux)
MW 20x18 / N38

Table 11: Physics of underwater searching
MW 20x18 / N38