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MW 15x4 / 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 010030

GTIN/EAN: 5906301810292

5.00

Diameter Ø

15 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

5.3 g

Magnetization Direction

↑ axial

Load capacity

4.22 kg / 41.38 N

Magnetic Induction

291.60 mT / 2916 Gs

Coating

[NiCuNi] Nickel

technical parameters »

1.968 ZŁ with VAT / pcs + price for transport

1.600 ZŁ net + 23% VAT / pcs

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Detailed specification - MW 15x4 / N38 - cylindrical magnet

Specification / characteristics - MW 15x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010030
GTIN/EAN	5906301810292
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	15 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	5.3 g
Magnetization Direction	↑ axial
Load capacity ~ ?	4.22 kg / 41.38 N
Magnetic Induction ~ ?	291.60 mT / 2916 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 15x4 / N38 - cylindrical magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	312 - 380	°C
Curie Temperature TF	593 - 716	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Physical modeling of the magnet - technical parameters

The following values are the outcome of a mathematical calculation. Values were calculated on algorithms for the material Nd₂Fe₁₄B. Operational parameters might slightly deviate from the simulation results. Use these data as a supplementary guide during assembly planning.

Table 1: Static force (pull vs gap) - power drop
MW 15x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2915 Gs 291.5 mT	4.22 kg / 9.30 lbs 4220.0 g / 41.4 N	warning
1 mm	2620 Gs 262.0 mT	3.41 kg / 7.51 lbs 3408.2 g / 33.4 N	warning
2 mm	2276 Gs 227.6 mT	2.57 kg / 5.67 lbs 2571.6 g / 25.2 N	warning
3 mm	1928 Gs 192.8 mT	1.85 kg / 4.07 lbs 1845.5 g / 18.1 N	low risk
5 mm	1324 Gs 132.4 mT	0.87 kg / 1.92 lbs 870.3 g / 8.5 N	low risk
10 mm	505 Gs 50.5 mT	0.13 kg / 0.28 lbs 126.7 g / 1.2 N	low risk
15 mm	222 Gs 22.2 mT	0.02 kg / 0.05 lbs 24.4 g / 0.2 N	low risk
20 mm	113 Gs 11.3 mT	0.01 kg / 0.01 lbs 6.3 g / 0.1 N	low risk
30 mm	40 Gs 4.0 mT	0.00 kg / 0.00 lbs 0.8 g / 0.0 N	low risk
50 mm	10 Gs 1.0 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	low risk

Grip strength decreases drastically per each millimeter of distance. Note that even a microscopic distance (e.g., dirt, varnish, dust) noticeably diminishes the holding power. Magnets operate strongest during direct contact; air break drastically cuts the power. Analyze how quickly the pull force fall, when the product does not adhere tightly to the metal substrate. When calculating the mounting, eliminate additional spacers.

Table 2: Vertical load (vertical surface)
MW 15x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.84 kg / 1.86 lbs 844.0 g / 8.3 N
1 mm	Stal (~0.2)	0.68 kg / 1.50 lbs 682.0 g / 6.7 N
2 mm	Stal (~0.2)	0.51 kg / 1.13 lbs 514.0 g / 5.0 N
3 mm	Stal (~0.2)	0.37 kg / 0.82 lbs 370.0 g / 3.6 N
5 mm	Stal (~0.2)	0.17 kg / 0.38 lbs 174.0 g / 1.7 N
10 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 26.0 g / 0.3 N
15 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 2.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The table below indicates the approximate weight limit required to initiate the downward movement of the magnet downwards along a upright steel wall (considering typical friction). This parameter is a function of the separation distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 15x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.27 kg / 2.79 lbs 1266.0 g / 12.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.84 kg / 1.86 lbs 844.0 g / 8.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.42 kg / 0.93 lbs 422.0 g / 4.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.11 kg / 4.65 lbs 2110.0 g / 20.7 N

When mounting a element on a upright surface (e.g., a car body), it you can count on barely about 1/5 of its maximum pull force. Gravitational force and a weak degree of grip mean that holders move down faster than they detach. Want to create a vertical fastening? Remember that the shear force is significantly lower than the perpendicular breakaway force. On a slippery surface, the element will slide down under a significantly smaller load. Application of an anti-slip pad can significantly improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 15x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.42 kg / 0.93 lbs 422.0 g / 4.1 N
1 mm	25%	1.06 kg / 2.33 lbs 1055.0 g / 10.3 N
2 mm	50%	2.11 kg / 4.65 lbs 2110.0 g / 20.7 N
3 mm	75%	3.17 kg / 6.98 lbs 3165.0 g / 31.0 N
5 mm	100%	4.22 kg / 9.30 lbs 4220.0 g / 41.4 N
10 mm	100%	4.22 kg / 9.30 lbs 4220.0 g / 41.4 N
11 mm	100%	4.22 kg / 9.30 lbs 4220.0 g / 41.4 N
12 mm	100%	4.22 kg / 9.30 lbs 4220.0 g / 41.4 N

A too thin steel is not enough to take in the entire magnetic field, which weakens actual performance of the holder. If you attach a powerful product to a too thin substrate, the field will penetrate right through and the pull force will drop sharply. To utilize the maximum of this neodymium's power, you require a sufficiently solid element of metal. The saturation effect means that on sheet metal structures (e.g., car bodies), the product works worse. We suggest choosing the steel thickness according to the table below.

Table 5: Thermal resistance (stability) - thermal limit
MW 15x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	4.22 kg / 9.30 lbs 4220.0 g / 41.4 N	OK
40 °C	-2.2%	4.13 kg / 9.10 lbs 4127.2 g / 40.5 N	OK
60 °C	-4.4%	4.03 kg / 8.89 lbs 4034.3 g / 39.6 N
80 °C	-6.6%	3.94 kg / 8.69 lbs 3941.5 g / 38.7 N
100 °C	-28.8%	3.00 kg / 6.62 lbs 3004.6 g / 29.5 N

Standard neodymium magnets irreversibly lose power past the thermal threshold. Avoid high temperatures – excessive heat can permanently demagnetize this product. As the temperature rises, the neodymium's capacity momentarily decreases. Refrain from using this product near heat sources higher than its operating temperature limit. Too high temperature will result in destruction of magnetic properties.

*Technical advisory: Thermal stability depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (pancake types) may lose charge permanently sooner than long magnets. Red status in the table signals a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MW 15x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	9.26 kg / 20.41 lbs 4 518 Gs	1.39 kg / 3.06 lbs 1389 g / 13.6 N	N/A
1 mm	8.40 kg / 18.53 lbs 5 555 Gs	1.26 kg / 2.78 lbs 1261 g / 12.4 N	7.56 kg / 16.68 lbs ~0 Gs
2 mm	7.48 kg / 16.48 lbs 5 239 Gs	1.12 kg / 2.47 lbs 1122 g / 11.0 N	6.73 kg / 14.84 lbs ~0 Gs
3 mm	6.54 kg / 14.42 lbs 4 901 Gs	0.98 kg / 2.16 lbs 981 g / 9.6 N	5.89 kg / 12.98 lbs ~0 Gs
5 mm	4.80 kg / 10.59 lbs 4 200 Gs	0.72 kg / 1.59 lbs 721 g / 7.1 N	4.32 kg / 9.53 lbs ~0 Gs
10 mm	1.91 kg / 4.21 lbs 2 648 Gs	0.29 kg / 0.63 lbs 286 g / 2.8 N	1.72 kg / 3.79 lbs ~0 Gs
20 mm	0.28 kg / 0.61 lbs 1 010 Gs	0.04 kg / 0.09 lbs 42 g / 0.4 N	0.25 kg / 0.55 lbs ~0 Gs
50 mm	0.00 kg / 0.01 lbs 128 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
60 mm	0.00 kg / 0.00 lbs 79 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 52 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 36 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 26 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 19 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two strong neodymiums attract each other from a much further distance than a neodymium and metal setup. The setup of two magnets creates a more powerful interaction and a wider radius of performance. Planning to create a powerful holder? Use a pair of magnets instead of one magnet and a steel. Remember that when attracting two neodymiums, the pinch force is extreme. The repulsion force is marginally weaker than the attraction, but still significant.
*Field value for N-N configuration drops to ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
* Results apply to shear force of two matching neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - warnings
MW 15x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	6.5 cm
Hearing aid	10 Gs (1.0 mT)	5.0 cm
Timepiece	20 Gs (2.0 mT)	4.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	3.0 cm
Car key	50 Gs (5.0 mT)	3.0 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Powerful magnet radiation is a serious hazard to IT equipment as well as pacemakers. These neodymiums generate a field that prevents correct functioning of digital equipment. Be aware: the unseen radiation passes through tissues and glass. Exceptional care must be taken by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, remotes, speakers, and screens. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Collisions (cracking risk) - warning
MW 15x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	28.99 km/h (8.05 m/s)	0.17 J
30 mm	49.30 km/h (13.69 m/s)	0.50 J
50 mm	63.63 km/h (17.68 m/s)	0.83 J
100 mm	89.99 km/h (25.00 m/s)	1.66 J

Magnetic elements are prone to chipping – a strong collision with metal risks their cracking. Control the attraction moment – a magnet released freely becomes dangerous. Kinetic force can trigger coating fragments or injury to skin. Be sure to control the product during installation so it doesn't slam with momentum against the metal. A collision at high speed means shattering of the magnet. Wear safety glasses when handling with large magnets.

Table 9: Corrosion resistance
MW 15x4 / N38

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

The following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MW 15x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	5 659 Mx	56.6 µWb
P_c Coefficient	0.37	Low (Flat)

Total magnetic flux emitted by the pole surface. Key data in coil applications and motors. P_c value determines the working geometry.

Table 11: Physics of underwater searching
MW 15x4 / N38

Environment	Effective steel pull	Effect
Air (land)	4.22 kg	Standard
Water (riverbed)	4.83 kg (+0.61 kg buoyancy gain)	+14.5%

Rust risk: 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. However, remember the water resistance when pulling the rope quickly.

1. Sliding resistance

*Note: On a vertical wall, the magnet holds just ~20% of its perpendicular strength.

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) significantly weakens 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) = 0.37

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

Material specification

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: 010030-2026

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This product is an extremely powerful cylinder magnet, composed of durable NdFeB material, which, at dimensions of Ø15x4 mm, guarantees optimal power. This specific item is characterized by high dimensional repeatability and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 4.22 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 secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

This model is perfect for building generators, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 41.38 N with a weight of only 5.3 g, this rod is indispensable in electronics and wherever low weight is crucial.

Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 15.1 mm) using epoxy glues. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.

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 (Ø15x4), 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 Ø15x4 mm, which, at a weight of 5.3 g, makes it an element with impressive magnetic energy density. The key parameter here is the holding force amounting to approximately 4.22 kg (force ~41.38 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it 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 15 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Strengths and weaknesses of rare earth magnets.

Pros

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

They retain magnetic properties for nearly ten years – the loss is just ~1% (based on simulations),
They possess excellent resistance to magnetism drop as a result of external magnetic sources,
Thanks to the reflective finish, the plating of nickel, gold, or silver-plated gives an elegant appearance,
Neodymium magnets create maximum magnetic induction on a small surface, which ensures high operational effectiveness,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
Possibility of precise machining and adjusting to complex conditions,
Versatile presence in advanced technology sectors – they are commonly used in HDD drives, brushless drives, advanced medical instruments, and other advanced devices.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Limitations

Cons of neodymium magnets: application proposals

To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
Neodymium magnets lose their strength 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
They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
Due to limitations in realizing threads and complicated shapes in magnets, we propose using a housing - magnetic mechanism.
Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical when they are in the body.
Due to expensive raw materials, their price is relatively high,

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

Information about lifting capacity was determined for the most favorable conditions, including:

using a base made of high-permeability steel, serving as a circuit closing element
whose transverse dimension is min. 10 mm
characterized by lack of roughness
under conditions of ideal adhesion (metal-to-metal)
during detachment in a direction perpendicular to the mounting surface
in stable room temperature

Lifting capacity in practice – influencing factors

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

Clearance – the presence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of nominal force).
Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
Steel grade – ideal substrate is high-permeability steel. Stainless steels may have worse magnetic properties.
Surface condition – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
Temperature influence – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Precautions when working with neodymium magnets

Thermal limits

Avoid heat. Neodymium magnets are sensitive to temperature. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Keep away from electronics

A strong magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Keep magnets close to a smartphone to avoid damaging the sensors.

Danger to the youngest

NdFeB magnets are not toys. Accidental ingestion of a few magnets can lead to them connecting inside the digestive tract, which constitutes a direct threat to life and requires urgent medical intervention.

Serious injuries

Protect your hands. Two large magnets will snap together immediately with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Eye protection

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.

Do not underestimate power

Be careful. Rare earth magnets attract from a long distance and connect with huge force, often quicker than you can move away.

Skin irritation risks

It is widely known that the nickel plating (the usual finish) is a common allergen. If you have an allergy, prevent direct skin contact or choose coated magnets.

Life threat

Warning for patients: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.

Cards and drives

Very strong magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Dust explosion hazard

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

Security! Details about hazards in the article: Safety of working with magnets.

MW 15x4 / N38 - cylindrical magnet

Detailed specification - MW 15x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the magnet - technical parameters

Table 1: Static force (pull vs gap) - power drop MW 15x4 / N38

Table 2: Vertical load (vertical surface) MW 15x4 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MW 15x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MW 15x4 / N38

Table 5: Thermal resistance (stability) - thermal limit MW 15x4 / N38

Table 6: Two magnets (attraction) - forces in the system MW 15x4 / N38

Table 7: Protective zones (implants) - warnings MW 15x4 / N38

Table 8: Collisions (cracking risk) - warning MW 15x4 / N38

Table 9: Corrosion resistance MW 15x4 / N38

Table 10: Electrical data (Flux) MW 15x4 / N38

Table 11: Physics of underwater searching MW 15x4 / N38

1. Sliding resistance

2. Efficiency vs thickness

3. Power loss vs temp

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

Material specification

Sustainability

Pulling force

Magnetic Field

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Strengths and weaknesses of rare earth magnets.

Pros

Limitations

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

Lifting capacity in practice – influencing factors

Precautions when working with neodymium magnets

Thermal limits

Keep away from electronics

Danger to the youngest

Serious injuries

Eye protection

Do not underestimate power

Skin irritation risks

Life threat

Cards and drives

Dust explosion hazard

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - power drop
MW 15x4 / N38

Table 2: Vertical load (vertical surface)
MW 15x4 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 15x4 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MW 15x4 / N38

Table 5: Thermal resistance (stability) - thermal limit
MW 15x4 / N38

Table 6: Two magnets (attraction) - forces in the system
MW 15x4 / N38

Table 7: Protective zones (implants) - warnings
MW 15x4 / N38

Table 8: Collisions (cracking risk) - warning
MW 15x4 / N38

Table 9: Corrosion resistance
MW 15x4 / N38

Table 10: Electrical data (Flux)
MW 15x4 / N38

Table 11: Physics of underwater searching
MW 15x4 / N38