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MW 5x4 / 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 010089

GTIN/EAN: 5906301810889

5.00

Diameter Ø

5 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

0.59 g

Magnetization Direction

↑ axial

Load capacity

0.84 kg / 8.26 N

Magnetic Induction

524.45 mT / 5244 Gs

Coating

[NiCuNi] Nickel

see technical specifications »

0.369 ZŁ with VAT / pcs + price for transport

0.300 ZŁ net + 23% VAT / pcs

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Technical details - MW 5x4 / N38 - cylindrical magnet

Specification / characteristics - MW 5x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010089
GTIN/EAN	5906301810889
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	5 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	0.59 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.84 kg / 8.26 N
Magnetic Induction ~ ?	524.45 mT / 5244 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x4 / 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 magnet - data

Presented values represent the outcome of a physical simulation. Results were calculated on models for the material Nd₂Fe₁₄B. Real-world conditions might slightly differ from theoretical values. Please consider these calculations as a reference point when designing systems.

Table 1: Static force (pull vs gap) - characteristics
MW 5x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5236 Gs 523.6 mT	0.84 kg / 1.85 lbs 840.0 g / 8.2 N	weak grip
1 mm	3243 Gs 324.3 mT	0.32 kg / 0.71 lbs 322.1 g / 3.2 N	weak grip
2 mm	1850 Gs 185.0 mT	0.10 kg / 0.23 lbs 104.8 g / 1.0 N	weak grip
3 mm	1076 Gs 107.6 mT	0.04 kg / 0.08 lbs 35.5 g / 0.3 N	weak grip
5 mm	428 Gs 42.8 mT	0.01 kg / 0.01 lbs 5.6 g / 0.1 N	weak grip
10 mm	89 Gs 8.9 mT	0.00 kg / 0.00 lbs 0.2 g / 0.0 N	weak grip
15 mm	31 Gs 3.1 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	weak grip
20 mm	15 Gs 1.5 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	weak grip
30 mm	5 Gs 0.5 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	weak grip
50 mm	1 Gs 0.1 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	weak grip

Magnetic force drops sharply with every subsequent millimeter of gap. Note that even the smallest gap (e.g., contamination, varnish, dust) significantly weakens the grip. Magnets hold most effectively during direct contact; gap weakens the force. Observe how quickly the load capacity plummet, when the magnet does not adhere directly to the metal substrate. When planning the assembly, discard redundant distances.

Table 2: Shear hold (wall)
MW 5x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.17 kg / 0.37 lbs 168.0 g / 1.6 N
1 mm	Stal (~0.2)	0.06 kg / 0.14 lbs 64.0 g / 0.6 N
2 mm	Stal (~0.2)	0.02 kg / 0.04 lbs 20.0 g / 0.2 N
3 mm	Stal (~0.2)	0.01 kg / 0.02 lbs 8.0 g / 0.1 N
5 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 2.0 g / 0.0 N
10 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 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 shows the approximate force sufficient to cause the sliding of the magnet down along a vertical steel plate (considering typical friction coefficient). The holding force depends on the distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MW 5x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.25 kg / 0.56 lbs 252.0 g / 2.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.17 kg / 0.37 lbs 168.0 g / 1.6 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.08 kg / 0.19 lbs 84.0 g / 0.8 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.42 kg / 0.93 lbs 420.0 g / 4.1 N

When hanging a element on a vertical surface (e.g., a car body), it you can count on just approx. 20%-30% of its nominal power. Gravitational force and a low friction coefficient mean that magnets move down faster than they detach. Designing a hanger? Note that the shear force is significantly lower than the maximum static pull force. On a slippery surface, the element will slip down under a noticeably lighter load. Using a rubber pad can significantly improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MW 5x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.08 kg / 0.19 lbs 84.0 g / 0.8 N
1 mm	25%	0.21 kg / 0.46 lbs 210.0 g / 2.1 N
2 mm	50%	0.42 kg / 0.93 lbs 420.0 g / 4.1 N
3 mm	75%	0.63 kg / 1.39 lbs 630.0 g / 6.2 N
5 mm	100%	0.84 kg / 1.85 lbs 840.0 g / 8.2 N
10 mm	100%	0.84 kg / 1.85 lbs 840.0 g / 8.2 N
11 mm	100%	0.84 kg / 1.85 lbs 840.0 g / 8.2 N
12 mm	100%	0.84 kg / 1.85 lbs 840.0 g / 8.2 N

A thin metal plate is incapable of conduct the entire magnetic field, which wastes potential of the magnet. Should you mount a strong magnet to a too thin substrate, the field will pass right through and the attraction force will be weaker. To squeeze 100% of this neodymium's power, you require a sufficiently solid element of steel. The saturation phenomenon means that on sheet metal structures (e.g., thin profiles), the product holds weaker. We advise picking the steel cross-section from these parameters.

Table 5: Thermal stability (stability) - power drop
MW 5x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	0.84 kg / 1.85 lbs 840.0 g / 8.2 N	OK
40 °C	-2.2%	0.82 kg / 1.81 lbs 821.5 g / 8.1 N	OK
60 °C	-4.4%	0.80 kg / 1.77 lbs 803.0 g / 7.9 N	OK
80 °C	-6.6%	0.78 kg / 1.73 lbs 784.6 g / 7.7 N
100 °C	-28.8%	0.60 kg / 1.32 lbs 598.1 g / 5.9 N

Ordinary NdFeB products irreversibly lose parameters after exceeding the maximum temperature. Avoid high temperatures – excessive heat can irreversibly destroy this magnet. As the temperature rises, the magnet's capacity briefly lowers. Do not use this magnet close to ovens exceeding its operating temperature limit. Exceeding the critical threshold will result in destruction of magnetic properties.

*Technical advisory: Heat tolerance is determined by both grade, as well as the dimension ratios. Flat magnets (pancake types) may lose charge permanently under lower heat stress than taller cylinders. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (repulsion) - field range
MW 5x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	3.32 kg / 7.32 lbs 5 894 Gs	0.50 kg / 1.10 lbs 498 g / 4.9 N	N/A
1 mm	2.14 kg / 4.72 lbs 8 408 Gs	0.32 kg / 0.71 lbs 321 g / 3.1 N	1.93 kg / 4.24 lbs ~0 Gs
2 mm	1.27 kg / 2.81 lbs 6 486 Gs	0.19 kg / 0.42 lbs 191 g / 1.9 N	1.15 kg / 2.53 lbs ~0 Gs
3 mm	0.73 kg / 1.61 lbs 4 909 Gs	0.11 kg / 0.24 lbs 109 g / 1.1 N	0.66 kg / 1.45 lbs ~0 Gs
5 mm	0.24 kg / 0.53 lbs 2 805 Gs	0.04 kg / 0.08 lbs 36 g / 0.4 N	0.21 kg / 0.47 lbs ~0 Gs
10 mm	0.02 kg / 0.05 lbs 857 Gs	0.00 kg / 0.01 lbs 3 g / 0.0 N	0.02 kg / 0.04 lbs ~0 Gs
20 mm	0.00 kg / 0.00 lbs 177 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
50 mm	0.00 kg / 0.00 lbs 16 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 9 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 6 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 4 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 3 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 2 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 sheet setup. The connection of magnet-to-magnet creates a more powerful interaction and a further horizon of operation. Planning to create a strong closure? Use a pair of magnets instead of one magnet and a striker plate. Exercise caution that when attracting two neodymiums, the pinch force is massive. The levitation is a bit weaker than the connection force, but still significant.
*Field value between like poles is approximately ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
Attention: Calculations refer to sliding force of two identical magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - warnings
MW 5x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	3.0 cm
Hearing aid	10 Gs (1.0 mT)	2.5 cm
Timepiece	20 Gs (2.0 mT)	2.0 cm
Mobile device	40 Gs (4.0 mT)	1.5 cm
Car key	50 Gs (5.0 mT)	1.5 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

Powerful magnet radiation poses a large risk to IT equipment and pacemakers. These NdFeB products generate a field that disrupts operation of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and glass. Increased vigilance must be exercised by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, remotes, speakers, and displays. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MW 5x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	38.06 km/h (10.57 m/s)	0.03 J
30 mm	65.91 km/h (18.31 m/s)	0.10 J
50 mm	85.09 km/h (23.64 m/s)	0.16 J
100 mm	120.34 km/h (33.43 m/s)	0.33 J

Magnetic elements are prone to chipping – a strong collision with metal can result in shattering. Pay attention to connection velocity – a magnet released freely turns into a projectile. Striking energy can cause material chips or injury to skin. Be sure to control the product during installation so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Surface protection spec
MW 5x4 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (P_c)
MW 5x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	1 046 Mx	10.5 µWb
P_c Coefficient	0.79	High (Stable)

Flux value emitted by the magnet pole. Key data in coil applications as well as sensors. The P_c coefficient defines the working geometry.

Table 11: Hydrostatics and buoyancy
MW 5x4 / N38

Environment	Effective steel pull	Effect
Air (land)	0.84 kg	Standard
Water (riverbed)	0.96 kg (+0.12 kg buoyancy gain)	+14.5%

Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

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

1. Shear force

*Warning: On a vertical wall, the magnet holds only approx. 20-30% of its max power.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.

3. Thermal stability

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.79

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 specification and ecology

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: 010089-2026

Magnet Unit Converter

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Kilograms (kg)

Newtons (N)

Force in lbs

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Input data in one of the inputs, to see all other values convert in real-time.

MPL 25x25x10 / N38 - lamellar magnet

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40.59 ZŁ brutto / pcs

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UMT 12x20 green / N38 - board holder

1.894 ZŁ brutto / pcs

This product is a very strong cylinder magnet, made from durable NdFeB material, which, with dimensions of Ø5x4 mm, guarantees optimal power. The MW 5x4 / N38 model is characterized by high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 0.84 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is perfect for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 8.26 N with a weight of only 0.59 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.

Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 5.1 mm) using two-component epoxy glues. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Magnets NdFeB grade N38 are suitable for 90% of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø5x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.

The presented product is a neodymium magnet with precisely defined parameters: diameter 5 mm and height 4 mm. The key parameter here is the holding force amounting to approximately 0.84 kg (force ~8.26 N), which, with such defined dimensions, proves the high power of the NdFeB material. 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 5 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 diametrically if your project requires it.

Pros and cons of rare earth magnets.

Advantages

Besides their exceptional pulling force, neodymium magnets offer the following advantages:

Their magnetic field remains stable, and after approximately ten years it decreases only by ~1% (according to research),
Magnets effectively resist against loss of magnetization caused by external fields,
The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
The surface of neodymium magnets generates a strong magnetic field – this is one of their assets,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
Considering the potential of free forming and customization to unique needs, NdFeB magnets can be produced in a variety of shapes and sizes, which makes them more universal,
Versatile presence in high-tech industry – they serve a role in computer drives, motor assemblies, precision medical tools, as well as complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in small systems

Limitations

Disadvantages of NdFeB magnets:

At very strong impacts they can crack, therefore we recommend 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 start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
Limited ability of producing threads in the magnet and complicated shapes - preferred is a housing - magnetic holder.
Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical in case of swallowing.
With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum holding power of the magnet – what affects it?

The specified lifting capacity concerns the maximum value, obtained under ideal test conditions, meaning:

with the contact of a sheet made of special test steel, guaranteeing maximum field concentration
with a thickness no less than 10 mm
characterized by smoothness
under conditions of ideal adhesion (surface-to-surface)
for force applied at a right angle (in the magnet axis)
at conditions approx. 20°C

Key elements affecting lifting force

Please note that the magnet holding will differ influenced by elements below, in order of importance:

Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
Metal type – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
Temperature – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Warnings

Implant safety

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

Serious injuries

Big blocks can smash fingers in a fraction of a second. Under no circumstances place your hand betwixt two attracting surfaces.

Impact on smartphones

An intense magnetic field disrupts the functioning of compasses in phones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.

Thermal limits

Regular neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Dust is flammable

Combustion risk: Neodymium dust is explosive. Avoid machining magnets without safety gear as this risks ignition.

Data carriers

Powerful magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Handling guide

Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Eye protection

Neodymium magnets are ceramic materials, which means they are prone to chipping. Impact of two magnets will cause them cracking into shards.

Metal Allergy

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, cease working with magnets and use protective gear.

This is not a toy

Adult use only. Small elements can be swallowed, causing severe trauma. Keep away from kids and pets.

Security! Want to know more? Check our post: Are neodymium magnets dangerous?

MW 5x4 / N38 - cylindrical magnet

Technical details - MW 5x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the magnet - data

Table 1: Static force (pull vs gap) - characteristics MW 5x4 / N38

Table 2: Shear hold (wall) MW 5x4 / N38

Table 3: Vertical assembly (shearing) - vertical pull MW 5x4 / N38

Table 4: Steel thickness (substrate influence) - power losses MW 5x4 / N38

Table 5: Thermal stability (stability) - power drop MW 5x4 / N38

Table 6: Two magnets (repulsion) - field range MW 5x4 / N38

Table 7: Safety (HSE) (electronics) - warnings MW 5x4 / N38

Table 8: Dynamics (cracking risk) - collision effects MW 5x4 / N38

Table 9: Surface protection spec MW 5x4 / N38

Table 10: Electrical data (Pc) MW 5x4 / N38

Table 11: Hydrostatics and buoyancy MW 5x4 / N38

1. Shear force

2. Plate thickness effect

3. Thermal stability

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

Chemical composition

Sustainability

Magnet pull force

Magnetic Field

See also proposals

MPL 25x25x10 / N38 - lamellar magnet

SM 32x450 [2xM8] / N52 - magnetic separator

UMGGZ 88x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

UMT 12x20 green / N38 - board holder

Pros and cons of rare earth magnets.

Advantages

Limitations

Pull force analysis

Maximum holding power of the magnet – what affects it?

Key elements affecting lifting force

Warnings

Implant safety

Serious injuries

Impact on smartphones

Thermal limits

Dust is flammable

Data carriers

Handling guide

Eye protection

Metal Allergy

This is not a toy

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - characteristics
MW 5x4 / N38

Table 2: Shear hold (wall)
MW 5x4 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MW 5x4 / N38

Table 4: Steel thickness (substrate influence) - power losses
MW 5x4 / N38

Table 5: Thermal stability (stability) - power drop
MW 5x4 / N38

Table 6: Two magnets (repulsion) - field range
MW 5x4 / N38

Table 7: Safety (HSE) (electronics) - warnings
MW 5x4 / N38

Table 8: Dynamics (cracking risk) - collision effects
MW 5x4 / N38

Table 9: Surface protection spec
MW 5x4 / N38

Table 10: Electrical data (P_c)
MW 5x4 / N38

Table 11: Hydrostatics and buoyancy
MW 5x4 / N38