Product available Ships tomorrow

MW 2x4 / 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: 1-6500
Rating: 5

cylindrical magnet

Catalog no 010055

GTIN/EAN: 5906301810544

5.00

Diameter Ø

2 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

0.09 g

Magnetization Direction

↑ axial

Load capacity

0.09 kg / 0.86 N

Magnetic Induction

597.70 mT / 5977 Gs

Coating

[NiCuNi] Nickel

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0.209 ZŁ with VAT / pcs + price for transport

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Physical properties - MW 2x4 / N38 - cylindrical magnet

Specification / characteristics - MW 2x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010055
GTIN/EAN	5906301810544
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	2 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	0.09 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.09 kg / 0.86 N
Magnetic Induction ~ ?	597.70 mT / 5977 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 2x4 / 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

Engineering analysis of the product - data

The following values constitute the result of a engineering calculation. Results were calculated on models for the class Nd₂Fe₁₄B. Real-world conditions may differ. Use these data as a preliminary roadmap when designing systems.

Table 1: Static force (pull vs distance) - interaction chart
MW 2x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	5954 Gs 595.4 mT	0.09 kg / 90.0 g 0.9 N	weak grip
1 mm	1696 Gs 169.6 mT	0.01 kg / 7.3 g 0.1 N	weak grip
2 mm	570 Gs 57.0 mT	0.00 kg / 0.8 g 0.0 N	weak grip
3 mm	256 Gs 25.6 mT	0.00 kg / 0.2 g 0.0 N	weak grip
5 mm	82 Gs 8.2 mT	0.00 kg / 0.0 g 0.0 N	weak grip
10 mm	15 Gs 1.5 mT	0.00 kg / 0.0 g 0.0 N	weak grip
15 mm	5 Gs 0.5 mT	0.00 kg / 0.0 g 0.0 N	weak grip
20 mm	2 Gs 0.2 mT	0.00 kg / 0.0 g 0.0 N	weak grip
30 mm	1 Gs 0.1 mT	0.00 kg / 0.0 g 0.0 N	weak grip
50 mm	0 Gs 0.0 mT	0.00 kg / 0.0 g 0.0 N	weak grip

Grip strength weakens drastically with every mm of spacing. Note that every additional insulation layer (e.g., dirt, paint, dust) noticeably reduces the pull force. Neodymiums hold strongest at the point of direct contact; distance drastically cuts the force. Analyze how quickly the pull force plummet, when the product does not touch flatly to the steel surface. When calculating the mounting, avoid additional spacers.

Table 2: Sliding force (vertical surface)
MW 2x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.02 kg / 18.0 g 0.2 N
1 mm	Stal (~0.2)	0.00 kg / 2.0 g 0.0 N
2 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
3 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
5 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
10 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N

The table below indicates the estimated force necessary to cause the sliding of the magnet down against a vertical metal surface (assuming typical friction coefficient). This parameter depends on the distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - vertical pull
MW 2x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.03 kg / 27.0 g 0.3 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.02 kg / 18.0 g 0.2 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.01 kg / 9.0 g 0.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.05 kg / 45.0 g 0.4 N

When hanging a element on a vertical plane (e.g., a board), it you can count on just approx. 1/5 of its nominal power. Gravity and a low friction coefficient cause that holders slide down easier than they pull off. Planning a vertical fastening? Note that the shear force is much weaker than the maximum static pull force. On a slippery surface, the magnet will give way down under a significantly smaller load. Using a rubber coating can effectively raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MW 2x4 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.01 kg / 9.0 g 0.1 N
1 mm	25%	0.02 kg / 22.5 g 0.2 N
2 mm	50%	0.05 kg / 45.0 g 0.4 N
5 mm	100%	0.09 kg / 90.0 g 0.9 N
10 mm	100%	0.09 kg / 90.0 g 0.9 N

A thin sheet is incapable of take in the full magnetic flux, which squanders power of the holder. If you mount a strong magnet to a weak sheet, the field will penetrate right through and the holding will be smaller. To squeeze the maximum of this magnet's power, you need a suitably thick piece of steel. The saturation phenomenon means that on sheet metal structures (e.g., thin profiles), the holder works worse. We recommend selecting the steel dimension based on the following data.

Table 5: Thermal resistance (stability) - resistance threshold
MW 2x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	0.09 kg / 90.0 g 0.9 N	OK
40 °C	-2.2%	0.09 kg / 88.0 g 0.9 N	OK
60 °C	-4.4%	0.09 kg / 86.0 g 0.8 N	OK
80 °C	-6.6%	0.08 kg / 84.1 g 0.8 N
100 °C	-28.8%	0.06 kg / 64.1 g 0.6 N

Ordinary NdFeB products change their properties parameters after exceeding the maximum temperature. Watch out for overheating – high temperature can permanently destroy this magnet. With every degree above norm, the neodymium's capacity temporarily lowers. Avoid using this magnet close to heaters higher than its safe range. Too high temperature will cause irreversible degradation of magnetism.

*Engineering note: Temperature resistance 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. The danger warning in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field collision
MW 2x4 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	0.69 kg / 687 g 6.7 N 6 090 Gs	N/A
1 mm	0.21 kg / 208 g 2.0 N 6 559 Gs	0.19 kg / 187 g 1.8 N ~0 Gs
2 mm	0.06 kg / 56 g 0.5 N 3 391 Gs	0.05 kg / 50 g 0.5 N ~0 Gs
3 mm	0.02 kg / 17 g 0.2 N 1 883 Gs	0.02 kg / 15 g 0.2 N ~0 Gs
5 mm	0.00 kg / 3 g 0.0 N 743 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
10 mm	0.00 kg / 0 g 0.0 N 165 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
20 mm	0.00 kg / 0 g 0.0 N 30 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 3 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnetic products attract each other from a much further distance than a neodymium and metal combination. The connection of two magnets creates a more powerful interaction and a larger range of action. Want to build a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Remember that when connecting a pair of magnets, the impact force is massive. The levitation is a bit weaker than the attraction, but still impressive.
*Field value in repulsion mode reaches ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).

Table 7: Hazards (implants) - warnings
MW 2x4 / N38

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

A strong magnetic field is a large risk to IT equipment and medical implants. These NdFeB products generate a flux that destroys function of digital equipment. Be aware: the unseen radiation passes through tissues and glass. Special caution must be taken by people with hearing aids and drug dispensers. The risk also applies to: mechanical watches, car keys, speakers, and screens. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - warning
MW 2x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	31.89 km/h (8.86 m/s)	0.00 J
30 mm	55.24 km/h (15.34 m/s)	0.01 J
50 mm	71.31 km/h (19.81 m/s)	0.02 J
100 mm	100.85 km/h (28.01 m/s)	0.04 J

NdFeB products are very brittle – a strong collision with metal can result in shattering. Control the attraction moment – a neodymium left loose becomes dangerous. Impact energy can cause material chips or painful pinches to fingers. Always hold the magnet during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear eye protection when handling with large magnets.

Table 9: Surface protection spec
MW 2x4 / 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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Note the thickness of the protective layer.

Table 10: Construction data (P_c)
MW 2x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	209 Mx	2.1 µWb
P_c Coefficient	1.21	High (Stable)

Total magnetic flux passing through the magnet pole. Key data in coil applications as well as sensors. P_c value determines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 2x4 / N38

Environment	Effective steel pull	Effect
Air (land)	0.09 kg	Standard
Water (riverbed)	0.10 kg (+0.01 kg Buoyancy gain)	+14.5%

Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

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

2. Steel saturation

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

3. Heat tolerance

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.21

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 specification and ecology

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%

Environmental data

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: 010055-2025

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MW 10x20 / N38 - cylindrical magnet

4.92 ZŁ brutto / pcs

The offered product is an extremely powerful rod magnet, composed of modern NdFeB material, which, at dimensions of Ø2x4 mm, guarantees optimal power. The MW 2x4 / N38 component is characterized by an accuracy of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 0.09 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating shields 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 filters, where maximum induction on a small surface counts. Thanks to the pull force of 0.86 N with a weight of only 0.09 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.

Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure long-term durability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Magnets N38 are suitable for the majority of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø2x4), 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 2 mm and height 4 mm. The value of 0.86 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.09 g. The product has a [NiCuNi] coating, which secures it against external factors, 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 2 mm. 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.

Pros and cons of Nd₂Fe₁₄B magnets.

Benefits

Besides their magnetic performance, neodymium magnets are valued for these benefits:

They do not lose magnetism, even over approximately 10 years – the decrease in power is only ~1% (based on measurements),
Magnets effectively defend themselves against demagnetization caused by foreign field sources,
By covering with a lustrous coating of gold, the element gains an aesthetic look,
They feature high magnetic induction at the operating surface, which affects their effectiveness,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
In view of the ability of free shaping and adaptation to specialized needs, NdFeB magnets can be modeled in a broad palette of geometric configurations, which amplifies use scope,
Key role in modern industrial fields – they serve a role in mass storage devices, electromotive mechanisms, advanced medical instruments, and industrial machines.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Drawbacks and weaknesses of neodymium magnets and ways of using them

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 power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and 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. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
We recommend a housing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated forms.
Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these magnets can complicate diagnosis medical when they are in the body.
With mass production the cost of neodymium magnets is economically unviable,

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

The force parameter is a measurement result executed under the following configuration:

with the contact of a yoke made of special test steel, ensuring maximum field concentration
whose thickness reaches at least 10 mm
characterized by lack of roughness
without any air gap between the magnet and steel
for force acting at a right angle (pull-off, not shear)
at standard ambient temperature

Practical lifting capacity: influencing factors

Bear in mind that the application force may be lower depending on the following factors, in order of importance:

Clearance – existence of foreign body (paint, dirt, air) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
Material type – the best choice is pure iron steel. Stainless steels may attract less.
Base smoothness – the more even the surface, the better the adhesion and stronger the hold. Unevenness creates an air distance.
Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was measured by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets

Eye protection

Protect your eyes. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.

Physical harm

Protect your hands. Two large magnets will join immediately with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

GPS and phone interference

A strong magnetic field negatively affects the functioning of magnetometers in smartphones and navigation systems. Do not bring magnets close to a device to prevent breaking the sensors.

Demagnetization risk

Regular neodymium magnets (N-type) lose power when the temperature goes above 80°C. Damage is permanent.

Allergic reactions

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, cease handling magnets and wear gloves.

Dust explosion hazard

Combustion risk: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.

Caution required

Use magnets consciously. Their immense force can shock even experienced users. Plan your moves and respect their force.

Data carriers

Do not bring magnets close to a purse, laptop, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Implant safety

Individuals with a heart stimulator should maintain an safe separation from magnets. The magnetism can disrupt the operation of the implant.

No play value

These products are not suitable for play. Eating several magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and requires urgent medical intervention.

Attention! Looking for details? Read our article: Why are neodymium magnets dangerous?

MW 2x4 / N38 - cylindrical magnet

Physical properties - MW 2x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the product - data

Table 1: Static force (pull vs distance) - interaction chart MW 2x4 / N38

Table 2: Sliding force (vertical surface) MW 2x4 / N38

Table 3: Wall mounting (shearing) - vertical pull MW 2x4 / N38

Table 4: Material efficiency (substrate influence) - power losses MW 2x4 / N38

Table 5: Thermal resistance (stability) - resistance threshold MW 2x4 / N38

Table 6: Two magnets (attraction) - field collision MW 2x4 / N38

Table 7: Hazards (implants) - warnings MW 2x4 / N38

Table 8: Dynamics (cracking risk) - warning MW 2x4 / N38

Table 9: Surface protection spec MW 2x4 / N38

Table 10: Construction data (Pc) MW 2x4 / N38

Table 11: Hydrostatics and buoyancy MW 2x4 / N38

1. Shear force

2. Steel saturation

3. Heat tolerance

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

Material specification

Environmental data

Force (pull)

Magnetic Field

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MW 10x20 / N38 - cylindrical magnet

Pros and cons of Nd2Fe14B magnets.

Benefits

Cons

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

Practical lifting capacity: influencing factors

H&S for magnets

Eye protection

Physical harm

GPS and phone interference

Demagnetization risk

Allergic reactions

Dust explosion hazard

Caution required

Data carriers

Implant safety

No play value

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - interaction chart
MW 2x4 / N38

Table 2: Sliding force (vertical surface)
MW 2x4 / N38

Table 3: Wall mounting (shearing) - vertical pull
MW 2x4 / N38

Table 4: Material efficiency (substrate influence) - power losses
MW 2x4 / N38

Table 5: Thermal resistance (stability) - resistance threshold
MW 2x4 / N38

Table 6: Two magnets (attraction) - field collision
MW 2x4 / N38

Table 7: Hazards (implants) - warnings
MW 2x4 / N38

Table 8: Dynamics (cracking risk) - warning
MW 2x4 / N38

Table 9: Surface protection spec
MW 2x4 / N38

Table 10: Construction data (P_c)
MW 2x4 / N38

Table 11: Hydrostatics and buoyancy
MW 2x4 / N38

Pros and cons of Nd₂Fe₁₄B magnets.