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MW 12x4 / 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 010019

GTIN/EAN: 5906301810186

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

3.39 g

Magnetization Direction

↑ axial

Load capacity

3.45 kg / 33.81 N

Magnetic Induction

343.64 mT / 3436 Gs

Coating

[NiCuNi] Nickel

check properties »

1.353 ZŁ with VAT / pcs + price for transport

1.100 ZŁ net + 23% VAT / pcs

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Call us +48 22 499 98 98 otherwise contact us by means of inquiry form the contact page.
Force and appearance of a neodymium magnet can be calculated with our magnetic mass calculator.

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Technical of the product - MW 12x4 / N38 - cylindrical magnet

Specification / characteristics - MW 12x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010019
GTIN/EAN	5906301810186
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	12 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	3.39 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.45 kg / 33.81 N
Magnetic Induction ~ ?	343.64 mT / 3436 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x4 / 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 simulation of the product - technical parameters

These values represent the direct effect of a mathematical simulation. Results are based on algorithms for the class Nd₂Fe₁₄B. Operational performance might slightly differ from theoretical values. Please consider these calculations as a reference point for designers.

Table 1: Static force (force vs gap) - power drop
MW 12x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3435 Gs 343.5 mT	3.45 kg / 7.61 lbs 3450.0 g / 33.8 N	warning
1 mm	2950 Gs 295.0 mT	2.54 kg / 5.61 lbs 2544.7 g / 25.0 N	warning
2 mm	2423 Gs 242.3 mT	1.72 kg / 3.79 lbs 1717.5 g / 16.8 N	low risk
3 mm	1935 Gs 193.5 mT	1.09 kg / 2.41 lbs 1094.6 g / 10.7 N	low risk
5 mm	1190 Gs 119.0 mT	0.41 kg / 0.91 lbs 413.8 g / 4.1 N	low risk
10 mm	382 Gs 38.2 mT	0.04 kg / 0.09 lbs 42.7 g / 0.4 N	low risk
15 mm	156 Gs 15.6 mT	0.01 kg / 0.02 lbs 7.1 g / 0.1 N	low risk
20 mm	76 Gs 7.6 mT	0.00 kg / 0.00 lbs 1.7 g / 0.0 N	low risk
30 mm	26 Gs 2.6 mT	0.00 kg / 0.00 lbs 0.2 g / 0.0 N	low risk
50 mm	6 Gs 0.6 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	low risk

Magnetic force decreases significantly with every subsequent millimeter of distance. Note that even a microscopic distance (e.g., dirt, varnish, rust) noticeably reduces the pull force. Magnetic products hold strongest during direct contact; distance drastically cuts the power. See how flashily the parameters plummet, when the product does not adhere tightly to the metal substrate. When planning the mounting, discard additional spacers.

Table 2: Sliding hold (wall)
MW 12x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.69 kg / 1.52 lbs 690.0 g / 6.8 N
1 mm	Stal (~0.2)	0.51 kg / 1.12 lbs 508.0 g / 5.0 N
2 mm	Stal (~0.2)	0.34 kg / 0.76 lbs 344.0 g / 3.4 N
3 mm	Stal (~0.2)	0.22 kg / 0.48 lbs 218.0 g / 2.1 N
5 mm	Stal (~0.2)	0.08 kg / 0.18 lbs 82.0 g / 0.8 N
10 mm	Stal (~0.2)	0.01 kg / 0.02 lbs 8.0 g / 0.1 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 2.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 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 following data defines the theoretical force needed to cause the shifting of the magnet down on a upright steel plate (assuming typical friction coefficient). This value depends on the separation distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 12x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.04 kg / 2.28 lbs 1035.0 g / 10.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.69 kg / 1.52 lbs 690.0 g / 6.8 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.35 kg / 0.76 lbs 345.0 g / 3.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.73 kg / 3.80 lbs 1725.0 g / 16.9 N

When hanging a holder on a upright plane (e.g., a car body), it you can count on barely approx. 1/5 of its maximum pull force. Gravity and a weak degree of grip influence the fact that holders slip faster than they pop off the substrate. Want to create a vertical fastening? Consider that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the holder will slide down under a noticeably lighter cargo. Application of an anti-slip coating can significantly increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 12x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.35 kg / 0.76 lbs 345.0 g / 3.4 N
1 mm	25%	0.86 kg / 1.90 lbs 862.5 g / 8.5 N
2 mm	50%	1.73 kg / 3.80 lbs 1725.0 g / 16.9 N
3 mm	75%	2.59 kg / 5.70 lbs 2587.5 g / 25.4 N
5 mm	100%	3.45 kg / 7.61 lbs 3450.0 g / 33.8 N
10 mm	100%	3.45 kg / 7.61 lbs 3450.0 g / 33.8 N
11 mm	100%	3.45 kg / 7.61 lbs 3450.0 g / 33.8 N
12 mm	100%	3.45 kg / 7.61 lbs 3450.0 g / 33.8 N

A thin metal plate is unable to take in the full magnetic flux, which wastes potential of the holder. If you install a neodymium to a too thin substrate, the flux will pass right through and the attraction force will be weaker. To utilize 100% of this neodymium's potential, you need a suitably thick backing of steel. The saturation effect causes that on sheet metal structures (e.g., thin profiles), the holder shows lower pull force. We recommend selecting the steel dimension based on the following data.

Table 5: Working in heat (stability) - resistance threshold
MW 12x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	3.45 kg / 7.61 lbs 3450.0 g / 33.8 N	OK
40 °C	-2.2%	3.37 kg / 7.44 lbs 3374.1 g / 33.1 N	OK
60 °C	-4.4%	3.30 kg / 7.27 lbs 3298.2 g / 32.4 N
80 °C	-6.6%	3.22 kg / 7.10 lbs 3222.3 g / 31.6 N
100 °C	-28.8%	2.46 kg / 5.42 lbs 2456.4 g / 24.1 N

Standard neodymium magnets lose strength above the temperature limit. Protect against heat – high temperature can irreversibly demagnetize this magnet. With every degree above norm, the neodymium's power briefly lowers. Do not use this magnet in hot environments higher than its safe range. Too high temperature will cause destruction of magnetism.

*Engineering note: Temperature resistance is determined by both grade, as well as the dimension ratios. Flat magnets (low Pc) may lose charge permanently at lower temperatures compared to rod magnets. Warning indicator in the table signals permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 12x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	8.23 kg / 18.13 lbs 4 952 Gs	1.23 kg / 2.72 lbs 1234 g / 12.1 N	N/A
1 mm	7.16 kg / 15.79 lbs 6 410 Gs	1.07 kg / 2.37 lbs 1074 g / 10.5 N	6.45 kg / 14.21 lbs ~0 Gs
2 mm	6.07 kg / 13.38 lbs 5 900 Gs	0.91 kg / 2.01 lbs 910 g / 8.9 N	5.46 kg / 12.04 lbs ~0 Gs
3 mm	5.03 kg / 11.09 lbs 5 372 Gs	0.75 kg / 1.66 lbs 754 g / 7.4 N	4.53 kg / 9.98 lbs ~0 Gs
5 mm	3.29 kg / 7.25 lbs 4 342 Gs	0.49 kg / 1.09 lbs 493 g / 4.8 N	2.96 kg / 6.52 lbs ~0 Gs
10 mm	0.99 kg / 2.18 lbs 2 379 Gs	0.15 kg / 0.33 lbs 148 g / 1.5 N	0.89 kg / 1.96 lbs ~0 Gs
20 mm	0.10 kg / 0.22 lbs 764 Gs	0.02 kg / 0.03 lbs 15 g / 0.1 N	0.09 kg / 0.20 lbs ~0 Gs
50 mm	0.00 kg / 0.00 lbs 85 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
60 mm	0.00 kg / 0.00 lbs 52 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
70 mm	0.00 kg / 0.00 lbs 34 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 23 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 17 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 12 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnets interact from a wider radius than a magnet and steel setup. Such a system of two magnets generates a stronger field and a larger range of action. Want to build a strong closure? Apply two magnets instead of a neodymium and a steel. Be careful that when bringing together two magnets, the impact force is huge. The levitation is marginally weaker than the attraction, but still significant.
*The magnetic induction for N-N configuration reaches ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Note: Calculations apply to shear force of a pair of matching magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - precautionary measures
MW 12x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	5.5 cm
Hearing aid	10 Gs (1.0 mT)	4.5 cm
Timepiece	20 Gs (2.0 mT)	3.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	3.0 cm
Car key	50 Gs (5.0 mT)	2.5 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Extremely neodym field poses a real danger to electronic devices as well as pacemakers. These NdFeB products produce a flux that prevents correct functioning of digital equipment. Remember: the invisible magnetic field penetrates the body and glass. Exceptional care must be exercised by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, remotes, membranes, and displays. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - warning
MW 12x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	32.42 km/h (9.01 m/s)	0.14 J
30 mm	55.73 km/h (15.48 m/s)	0.41 J
50 mm	71.94 km/h (19.98 m/s)	0.68 J
100 mm	101.74 km/h (28.26 m/s)	1.35 J

Magnetic elements are prone to chipping – a strong collision with metal can result in shattering. Control the attraction moment – a magnet released freely becomes dangerous. Striking energy can destroy the magnet or dangerous crushing to skin. Always hold the magnet during installation so it doesn't slam with momentum against the metal. A collision at high speed almost guarantees destruction of the neodymium. Wear safety glasses when working with large magnets.

Table 9: Corrosion resistance
MW 12x4 / N38

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

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

Table 10: Construction data (Flux)
MW 12x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	4 114 Mx	41.1 µWb
P_c Coefficient	0.44	Low (Flat)

Flux value passing through the pole surface. Key data in coil applications as well as sensors. The P_c coefficient defines the magnet's operating point.

Table 11: Physics of underwater searching
MW 12x4 / N38

Environment	Effective steel pull	Effect
Air (land)	3.45 kg	Standard
Water (riverbed)	3.95 kg (+0.50 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. Buoyancy helps in lifting finds.

1. Vertical hold

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

2. Steel thickness impact

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

3. Heat tolerance

*For N38 material, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.44

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

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: 010019-2026

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The presented product is an incredibly powerful cylindrical magnet, composed of modern NdFeB material, which, with dimensions of Ø12x4 mm, guarantees optimal power. The MW 12x4 / N38 component is characterized by high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 3.45 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is created for building generators, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 33.81 N with a weight of only 3.39 g, this cylindrical magnet is indispensable in miniature devices 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 professional component. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.

Magnets N38 are strong enough for 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø12x4), 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 Ø12x4 mm, which, at a weight of 3.39 g, makes it an element with high magnetic energy density. The value of 33.81 N means that the magnet is capable of holding a weight many times exceeding its own mass of 3.39 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.

This cylinder 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 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.

Pros as well as cons of rare earth magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:

They do not lose strength, even during nearly 10 years – the drop in power is only ~1% (according to tests),
They do not lose their magnetic properties even under strong external field,
In other words, due to the glossy layer of silver, the element looks attractive,
The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
Possibility of precise machining and adapting to atypical conditions,
Fundamental importance in high-tech industry – they are used in data components, electric motors, medical devices, also technologically advanced constructions.
Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Disadvantages

Disadvantages of neodymium magnets:

To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously increases its 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
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
We recommend cover - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex shapes.
Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that small elements of these products can disrupt the diagnostic process medical when they are in the body.
With large orders the cost of neodymium magnets is economically unviable,

Pull force analysis

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

Breakaway force was determined for optimal configuration, taking into account:

on a block made of structural steel, optimally conducting the magnetic flux
with a thickness no less than 10 mm
characterized by lack of roughness
without any air gap between the magnet and steel
during pulling in a direction perpendicular to the plane
in stable room temperature

Lifting capacity in real conditions – factors

Real force is affected by working environment parameters, such as (from most important):

Distance (between the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, rust or debris).
Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be lost into the air.
Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
Smoothness – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
Thermal environment – heating the magnet causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet and the plate reduces the lifting capacity.

Warnings

Life threat

Warning for patients: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.

Threat to navigation

A powerful magnetic field negatively affects the functioning of magnetometers in smartphones and navigation systems. Keep magnets close to a device to avoid damaging the sensors.

Material brittleness

Despite the nickel coating, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Conscious usage

Be careful. Rare earth magnets act from a distance and snap with massive power, often faster than you can react.

Pinching danger

Big blocks can crush fingers instantly. Do not put your hand between two strong magnets.

Magnetic media

Do not bring magnets near a purse, laptop, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Allergic reactions

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If skin irritation happens, cease handling magnets and use protective gear.

Permanent damage

Watch the temperature. Heating the magnet above 80 degrees Celsius will destroy its properties and pulling force.

No play value

NdFeB magnets are not intended for children. Eating several magnets may result in them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.

Machining danger

Machining of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

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

MW 12x4 / N38 - cylindrical magnet

Technical of the product - MW 12x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the product - technical parameters

Table 1: Static force (force vs gap) - power drop MW 12x4 / N38

Table 2: Sliding hold (wall) MW 12x4 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MW 12x4 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MW 12x4 / N38

Table 5: Working in heat (stability) - resistance threshold MW 12x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MW 12x4 / N38

Table 7: Protective zones (electronics) - precautionary measures MW 12x4 / N38

Table 8: Dynamics (kinetic energy) - warning MW 12x4 / N38

Table 9: Corrosion resistance MW 12x4 / N38

Table 10: Construction data (Flux) MW 12x4 / N38

Table 11: Physics of underwater searching MW 12x4 / N38

1. Vertical hold

2. Steel thickness impact

3. Heat tolerance

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

Chemical composition

Sustainability

Force (pull)

Field Strength

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UMP 97x40 [M8+M10] GW F300 Lina / N38 - search holder

SM 25x150 [2xM8] / N42 - magnetic separator

ZM XMAG2 210 elementów - magnetic toy

Pros as well as cons of rare earth magnets.

Strengths

Disadvantages

Pull force analysis

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

Lifting capacity in real conditions – factors

Warnings

Life threat

Threat to navigation

Material brittleness

Conscious usage

Pinching danger

Magnetic media

Allergic reactions

Permanent damage

No play value

Machining danger

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - power drop
MW 12x4 / N38

Table 2: Sliding hold (wall)
MW 12x4 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 12x4 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 12x4 / N38

Table 5: Working in heat (stability) - resistance threshold
MW 12x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 12x4 / N38

Table 7: Protective zones (electronics) - precautionary measures
MW 12x4 / N38

Table 8: Dynamics (kinetic energy) - warning
MW 12x4 / N38

Table 9: Corrosion resistance
MW 12x4 / N38

Table 10: Construction data (Flux)
MW 12x4 / N38

Table 11: Physics of underwater searching
MW 12x4 / N38