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MW 19x4 / 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 010038

GTIN/EAN: 5906301810377

Diameter Ø

19 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

8.51 g

Magnetization Direction

↑ axial

Load capacity

4.96 kg / 48.62 N

Magnetic Induction

240.51 mT / 2405 Gs

Coating

[Zn] Zinc

technical details »

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Technical of the product - MW 19x4 / N38 - cylindrical magnet

Specification / characteristics - MW 19x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010038
GTIN/EAN	5906301810377
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	19 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	8.51 g
Magnetization Direction	↑ axial
Load capacity ~ ?	4.96 kg / 48.62 N
Magnetic Induction ~ ?	240.51 mT / 2405 Gs
Coating	[Zn] Zinc
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 19x4 / 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

Technical modeling of the product - data

These data are the outcome of a physical calculation. Values were calculated on models for the class Nd₂Fe₁₄B. Actual performance may differ. Use these data as a supplementary guide when designing systems.

Table 1: Static force (pull vs gap) - power drop
MW 19x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2405 Gs 240.5 mT	4.96 kg / 10.93 pounds 4960.0 g / 48.7 N	medium risk
1 mm	2239 Gs 223.9 mT	4.30 kg / 9.48 pounds 4299.0 g / 42.2 N	medium risk
2 mm	2033 Gs 203.3 mT	3.55 kg / 7.82 pounds 3547.4 g / 34.8 N	medium risk
3 mm	1811 Gs 181.1 mT	2.81 kg / 6.20 pounds 2813.0 g / 27.6 N	medium risk
5 mm	1376 Gs 137.6 mT	1.63 kg / 3.58 pounds 1625.2 g / 15.9 N	low risk
10 mm	635 Gs 63.5 mT	0.35 kg / 0.76 pounds 346.3 g / 3.4 N	low risk
15 mm	308 Gs 30.8 mT	0.08 kg / 0.18 pounds 81.2 g / 0.8 N	low risk
20 mm	164 Gs 16.4 mT	0.02 kg / 0.05 pounds 23.2 g / 0.2 N	low risk
30 mm	61 Gs 6.1 mT	0.00 kg / 0.01 pounds 3.1 g / 0.0 N	low risk
50 mm	15 Gs 1.5 mT	0.00 kg / 0.00 pounds 0.2 g / 0.0 N	low risk

Grip strength decreases drastically per each millimeter of distance. Keep in mind that every additional insulation layer (e.g., dirt, varnish, dust) noticeably diminishes the holding power. Magnetic products hold most effectively at the point of direct contact; gap weakens the power. See how flashily the pull force fall, when the product does not adhere directly to the metal substrate. When designing the assembly, avoid redundant distances.

Table 2: Sliding force (wall)
MW 19x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.99 kg / 2.19 pounds 992.0 g / 9.7 N
1 mm	Stal (~0.2)	0.86 kg / 1.90 pounds 860.0 g / 8.4 N
2 mm	Stal (~0.2)	0.71 kg / 1.57 pounds 710.0 g / 7.0 N
3 mm	Stal (~0.2)	0.56 kg / 1.24 pounds 562.0 g / 5.5 N
5 mm	Stal (~0.2)	0.33 kg / 0.72 pounds 326.0 g / 3.2 N
10 mm	Stal (~0.2)	0.07 kg / 0.15 pounds 70.0 g / 0.7 N
15 mm	Stal (~0.2)	0.02 kg / 0.04 pounds 16.0 g / 0.2 N
20 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The following data shows the estimated shear load necessary to start the shifting of the magnet vertically on a vertical metal surface (assuming typical friction). The holding force varies with the gap size between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 19x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.49 kg / 3.28 pounds 1488.0 g / 14.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.99 kg / 2.19 pounds 992.0 g / 9.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.50 kg / 1.09 pounds 496.0 g / 4.9 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.48 kg / 5.47 pounds 2480.0 g / 24.3 N

When placing a holder on a upright wall (e.g., a car body), it you can count on just approx. 1/5 of its nominal power. Gravitational force as well as a weak degree of grip cause that products slide down easier than they pop off the substrate. Planning a vertical fastening? Consider that the shear force is noticeably lower than the maximum static pull force. On a smooth steel, the magnet will slip down under a much lighter weight. Application of an anti-slip coating can drastically raise the stability.

Table 4: Steel thickness (saturation) - power losses
MW 19x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.50 kg / 1.09 pounds 496.0 g / 4.9 N
1 mm	25%	1.24 kg / 2.73 pounds 1240.0 g / 12.2 N
2 mm	50%	2.48 kg / 5.47 pounds 2480.0 g / 24.3 N
3 mm	75%	3.72 kg / 8.20 pounds 3720.0 g / 36.5 N
5 mm	100%	4.96 kg / 10.93 pounds 4960.0 g / 48.7 N
10 mm	100%	4.96 kg / 10.93 pounds 4960.0 g / 48.7 N
11 mm	100%	4.96 kg / 10.93 pounds 4960.0 g / 48.7 N
12 mm	100%	4.96 kg / 10.93 pounds 4960.0 g / 48.7 N

A thin sheet cannot absorb the full magnetic flux, which wastes potential of the holder. If you attach a powerful product to a thin surface, the flux will pass right through and the pull force will drop sharply. To achieve 100% of this magnet's potential, you need a suitably thick element of metal. The saturation effect means that on thin elements (e.g., car bodies), the magnet shows lower pull force. We recommend selecting the steel dimension based on the following data.

Table 5: Working in heat (stability) - resistance threshold
MW 19x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	4.96 kg / 10.93 pounds 4960.0 g / 48.7 N	OK
40 °C	-2.2%	4.85 kg / 10.69 pounds 4850.9 g / 47.6 N	OK
60 °C	-4.4%	4.74 kg / 10.45 pounds 4741.8 g / 46.5 N
80 °C	-6.6%	4.63 kg / 10.21 pounds 4632.6 g / 45.4 N
100 °C	-28.8%	3.53 kg / 7.79 pounds 3531.5 g / 34.6 N

Ordinary NdFeB products irreversibly lose strength above the temperature limit. Protect against heat – high temperature can irreversibly demagnetize this magnet. As the temperature rises, the magnet's capacity momentarily drops. Refrain from using this magnet close to heaters exceeding its operating temperature limit. Too high temperature will cause irreversible degradation of magnetism.

*Engineering note: Heat tolerance is determined by both grade, but also on the magnet's shape. Flat magnets (pancake types) are more susceptible to demagnetization at lower temperatures than long magnets. Red status in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (repulsion) - forces in the system
MW 19x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	10.11 kg / 22.28 pounds 3 990 Gs	1.52 kg / 3.34 pounds 1516 g / 14.9 N	N/A
1 mm	9.48 kg / 20.89 pounds 4 657 Gs	1.42 kg / 3.13 pounds 1421 g / 13.9 N	8.53 kg / 18.80 pounds ~0 Gs
2 mm	8.76 kg / 19.31 pounds 4 477 Gs	1.31 kg / 2.90 pounds 1314 g / 12.9 N	7.88 kg / 17.38 pounds ~0 Gs
3 mm	8.00 kg / 17.64 pounds 4 279 Gs	1.20 kg / 2.65 pounds 1200 g / 11.8 N	7.20 kg / 15.88 pounds ~0 Gs
5 mm	6.47 kg / 14.25 pounds 3 846 Gs	0.97 kg / 2.14 pounds 970 g / 9.5 N	5.82 kg / 12.83 pounds ~0 Gs
10 mm	3.31 kg / 7.30 pounds 2 753 Gs	0.50 kg / 1.10 pounds 497 g / 4.9 N	2.98 kg / 6.57 pounds ~0 Gs
20 mm	0.71 kg / 1.56 pounds 1 271 Gs	0.11 kg / 0.23 pounds 106 g / 1.0 N	0.64 kg / 1.40 pounds ~0 Gs
50 mm	0.02 kg / 0.04 pounds 193 Gs	0.00 kg / 0.01 pounds 2 g / 0.0 N	0.01 kg / 0.03 pounds ~0 Gs
60 mm	0.01 kg / 0.01 pounds 121 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
70 mm	0.00 kg / 0.01 pounds 81 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.00 pounds 56 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 41 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 30 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 magnet and steel combination. The setup of two magnets creates a more powerful interaction and a wider radius of operation. Designing a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Be careful that when connecting a pair of magnets, the collision energy is extreme. The levitation is a bit weaker than the connection force, but still significant.
*Field value for N-N configuration reaches ~0 Gs in the exact middle of the gap (resulting from vector opposition).
Note: Calculations demonstrate sliding force of a pair of same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - warnings
MW 19x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	7.5 cm
Hearing aid	10 Gs (1.0 mT)	6.0 cm
Mechanical watch	20 Gs (2.0 mT)	5.0 cm
Mobile device	40 Gs (4.0 mT)	4.0 cm
Car key	50 Gs (5.0 mT)	3.5 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field is a real danger to electronics as well as medical implants. These NdFeB products produce a flux that disrupts operation of digital equipment. Be aware: the invisible magnetic field penetrates the body and glass. Special caution must be exercised by people with cochlear implants and drug dispensers. Influence will be felt by: automatic timepieces, car keys, membranes, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MW 19x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	25.39 km/h (7.05 m/s)	0.21 J
30 mm	42.19 km/h (11.72 m/s)	0.58 J
50 mm	54.44 km/h (15.12 m/s)	0.97 J
100 mm	76.99 km/h (21.39 m/s)	1.95 J

NdFeB products are delicate – a violent impact against metal causes immediate chipping. Watch the impact speed – a magnet released freely becomes dangerous. Striking energy can cause material chips or dangerous crushing to skin. Always hold the magnet during mounting 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 eye protection when working with powerful specimens.

Table 9: Corrosion resistance
MW 19x4 / N38

Technical parameter	Value / Description
Coating type	[Zn] Zinc
Layer structure	Zn (Zinc)
Layer thickness	8-15 µm
Salt spray test (SST) ?	48 h
Recommended environment	Indoors / Garage

The following table defines the conditions under which this product can be safely used. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MW 19x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	7 831 Mx	78.3 µWb
P_c Coefficient	0.30	Low (Flat)

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

Table 11: Underwater work (magnet fishing)
MW 19x4 / N38

Environment	Effective steel pull	Effect
Air (land)	4.96 kg	Standard
Water (riverbed)	5.68 kg (+0.72 kg buoyancy gain)	+14.5%

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

Contrary to myths, water does not block the magnetic field. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

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

2. Efficiency vs thickness

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

3. Thermal stability

*For N38 grade, 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) = 0.30

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

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%

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: 010038-2026

Measurement Calculator

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The offered product is a very strong cylinder magnet, produced from durable NdFeB material, which, with dimensions of Ø19x4 mm, guarantees optimal power. The MW 19x4 / N38 model features an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 4.96 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating shields 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 magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 48.62 N with a weight of only 8.51 g, this rod is indispensable in electronics and wherever low weight is crucial.

Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 19.1 mm) using epoxy glues. To ensure long-term durability in industry, anaerobic resins 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 an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø19x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 19 mm and height 4 mm. The key parameter here is the holding force amounting to approximately 4.96 kg (force ~48.62 N), which, with such compact dimensions, proves the high grade of the NdFeB material. 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 4 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard 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 as well as weaknesses of rare earth magnets.

Benefits

Besides their immense field intensity, neodymium magnets offer the following advantages:

They do not lose magnetism, even during nearly 10 years – the reduction in power is only ~1% (theoretically),
They have excellent resistance to magnetic field loss when exposed to external fields,
The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to look better,
Magnetic induction on the top side of the magnet turns out to be extremely intense,
Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures reaching 230°C and above...
Due to the possibility of free shaping and customization to unique solutions, NdFeB magnets can be modeled in a variety of geometric configurations, which makes them more universal,
Huge importance in electronics industry – they are utilized in mass storage devices, electric drive systems, medical devices, and complex engineering applications.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Problematic aspects of neodymium magnets and proposals for their use:

To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
Neodymium magnets lose their force 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 stability even at temperatures up to 230°C
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
Limited ability of making nuts in the magnet and complicated forms - recommended is casing - magnet mounting.
Potential hazard resulting from small fragments of magnets are risky, if swallowed, which gains importance in the context of child safety. Furthermore, tiny parts of these products can complicate diagnosis medical after entering the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Best holding force of the magnet in ideal parameters – what contributes to it?

The force parameter is a theoretical maximum value performed under standard conditions:

using a sheet made of high-permeability steel, functioning as a magnetic yoke
whose transverse dimension equals approx. 10 mm
characterized by smoothness
under conditions of ideal adhesion (surface-to-surface)
under axial application of breakaway force (90-degree angle)
in temp. approx. 20°C

Practical aspects of lifting capacity – factors

In practice, the actual lifting capacity results from several key aspects, ranked from crucial:

Distance – the presence of foreign body (rust, dirt, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
Base massiveness – insufficiently thick steel does not close the flux, causing part of the power to be lost into the air.
Plate material – mild steel gives the best results. Alloy steels reduce magnetic permeability and lifting capacity.
Surface finish – full contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
Thermal factor – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

H&S for magnets

Sensitization to coating

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness happens, cease working with magnets and use protective gear.

Safe operation

Handle magnets consciously. Their immense force can shock even experienced users. Plan your moves and do not underestimate their power.

Hand protection

Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!

Machining danger

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

Data carriers

Do not bring magnets close to a wallet, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Phone sensors

Navigation devices and smartphones are highly susceptible to magnetic fields. Close proximity with a strong magnet can ruin the sensors in your phone.

Maximum temperature

Avoid heat. NdFeB magnets are susceptible to temperature. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).

Keep away from children

NdFeB magnets are not suitable for play. Swallowing multiple magnets can lead to them pinching intestinal walls, which poses a critical condition and necessitates urgent medical intervention.

Life threat

Individuals with a pacemaker should keep an safe separation from magnets. The magnetic field can disrupt the operation of the implant.

Eye protection

Neodymium magnets are ceramic materials, meaning they are very brittle. Collision of two magnets leads to them breaking into shards.

Caution! More info about hazards in the article: Safety of working with magnets.

MW 19x4 / N38 - cylindrical magnet

Technical of the product - MW 19x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the product - data

Table 1: Static force (pull vs gap) - power drop MW 19x4 / N38

Table 2: Sliding force (wall) MW 19x4 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MW 19x4 / N38

Table 4: Steel thickness (saturation) - power losses MW 19x4 / N38

Table 5: Working in heat (stability) - resistance threshold MW 19x4 / N38

Table 6: Two magnets (repulsion) - forces in the system MW 19x4 / N38

Table 7: Hazards (implants) - warnings MW 19x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects MW 19x4 / N38

Table 9: Corrosion resistance MW 19x4 / N38

Table 10: Electrical data (Flux) MW 19x4 / N38

Table 11: Underwater work (magnet fishing) MW 19x4 / N38

1. Sliding resistance

2. Efficiency vs thickness

3. Thermal stability

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

Chemical composition

Sustainability

Pulling force

Magnetic Field

Other proposals

MW 9x3 / N38 - cylindrical magnet

UMH 48x11x65 [M6] / N38 - magnetic holder with hook

MP 25x7.5/4.5x5 / N38 - ring magnet

UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread

Strengths as well as weaknesses of rare earth magnets.

Benefits

Limitations

Pull force analysis

Best holding force of the magnet in ideal parameters – what contributes to it?

Practical aspects of lifting capacity – factors

H&S for magnets

Sensitization to coating

Safe operation

Hand protection

Machining danger

Data carriers

Phone sensors

Maximum temperature

Keep away from children

Life threat

Eye protection

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - power drop
MW 19x4 / N38

Table 2: Sliding force (wall)
MW 19x4 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 19x4 / N38

Table 4: Steel thickness (saturation) - power losses
MW 19x4 / N38

Table 5: Working in heat (stability) - resistance threshold
MW 19x4 / N38

Table 6: Two magnets (repulsion) - forces in the system
MW 19x4 / N38

Table 7: Hazards (implants) - warnings
MW 19x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MW 19x4 / N38

Table 9: Corrosion resistance
MW 19x4 / N38

Table 10: Electrical data (Flux)
MW 19x4 / N38

Table 11: Underwater work (magnet fishing)
MW 19x4 / N38