Product available Ships tomorrow

MW 10x3 / 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 010008

GTIN/EAN: 5906301810070

5.00

Diameter Ø

10 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

1.77 g

Magnetization Direction

↑ axial

Load capacity

2.15 kg / 21.04 N

Magnetic Induction

318.70 mT / 3187 Gs

Coating

[NiCuNi] Nickel

technical specifications »

0.726 ZŁ with VAT / pcs + price for transport

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Detailed specification - MW 10x3 / N38 - cylindrical magnet

Specification / characteristics - MW 10x3 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010008
GTIN/EAN	5906301810070
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	10 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	1.77 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.15 kg / 21.04 N
Magnetic Induction ~ ?	318.70 mT / 3187 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 10x3 / 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 modeling of the assembly - report

Presented information constitute the result of a physical calculation. Values were calculated on models for the class Nd₂Fe₁₄B. Operational performance may deviate from the simulation results. Treat these calculations as a supplementary guide during assembly planning.

Table 1: Static pull force (force vs gap) - characteristics
MW 10x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	3185 Gs 318.5 mT	2.15 kg / 2150.0 g 21.1 N	warning
1 mm	2657 Gs 265.7 mT	1.50 kg / 1496.2 g 14.7 N	weak grip
2 mm	2081 Gs 208.1 mT	0.92 kg / 918.1 g 9.0 N	weak grip
3 mm	1573 Gs 157.3 mT	0.52 kg / 524.4 g 5.1 N	weak grip
5 mm	874 Gs 87.4 mT	0.16 kg / 161.7 g 1.6 N	weak grip
10 mm	241 Gs 24.1 mT	0.01 kg / 12.3 g 0.1 N	weak grip
15 mm	92 Gs 9.2 mT	0.00 kg / 1.8 g 0.0 N	weak grip
20 mm	44 Gs 4.4 mT	0.00 kg / 0.4 g 0.0 N	weak grip
30 mm	14 Gs 1.4 mT	0.00 kg / 0.0 g 0.0 N	weak grip
50 mm	3 Gs 0.3 mT	0.00 kg / 0.0 g 0.0 N	weak grip

Magnetic force weakens drastically with every mm of gap. Note that every additional insulation layer (e.g., dirt, paint, rust) noticeably reduces the pull force. Magnets work strongest during direct contact; gap weakens the power. Observe how quickly the load capacity fall, when the magnet does not touch flatly to the metal substrate. When calculating the assembly, eliminate additional spacers.

Table 2: Sliding capacity (vertical surface)
MW 10x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.43 kg / 430.0 g 4.2 N
1 mm	Stal (~0.2)	0.30 kg / 300.0 g 2.9 N
2 mm	Stal (~0.2)	0.18 kg / 184.0 g 1.8 N
3 mm	Stal (~0.2)	0.10 kg / 104.0 g 1.0 N
5 mm	Stal (~0.2)	0.03 kg / 32.0 g 0.3 N
10 mm	Stal (~0.2)	0.00 kg / 2.0 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 following data indicates the approximate weight limit necessary to cause the shifting of the magnet vertically against a upright steel wall (considering typical friction coefficient). The holding force is relative to the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 10x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.64 kg / 645.0 g 6.3 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.43 kg / 430.0 g 4.2 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.22 kg / 215.0 g 2.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.08 kg / 1075.0 g 10.5 N

When mounting a holder on a vertical wall (e.g., a fridge), it will only hold only approx. 1/5 of its maximum pull force. Gravitational force and a weak degree of grip influence the fact that holders slide down easier than they pop off the substrate. Planning a wall mount? Remember that the sliding force is significantly lower than the maximum static pull force. On a painted metal, the holder will give way down under a much lighter weight. Using a rubber coating can drastically raise the stability.

Table 4: Steel thickness (saturation) - power losses
MW 10x3 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.22 kg / 215.0 g 2.1 N
1 mm	25%	0.54 kg / 537.5 g 5.3 N
2 mm	50%	1.08 kg / 1075.0 g 10.5 N
5 mm	100%	2.15 kg / 2150.0 g 21.1 N
10 mm	100%	2.15 kg / 2150.0 g 21.1 N

A too thin steel is not enough to conduct the full magnetic flux, which wastes potential of the magnet. If you attach a powerful product to a thin surface, the flux will penetrate right through and the attraction force will be weaker. To achieve full efficiency of this neodymium's power, you need a suitably thick element of metal. The material oversaturation means that on sheet metal structures (e.g., car bodies), the product shows lower pull force. We recommend selecting the steel thickness from these parameters.

Table 5: Working in heat (material behavior) - power drop
MW 10x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	2.15 kg / 2150.0 g 21.1 N	OK
40 °C	-2.2%	2.10 kg / 2102.7 g 20.6 N	OK
60 °C	-4.4%	2.06 kg / 2055.4 g 20.2 N
80 °C	-6.6%	2.01 kg / 2008.1 g 19.7 N
100 °C	-28.8%	1.53 kg / 1530.8 g 15.0 N

Ordinary NdFeB products change their properties strength after exceeding the maximum temperature. Watch out for overheating – excessive heat can irreversibly damage this magnet. With increasing heat, the magnet's capacity momentarily decreases. Refrain from using this product close to ovens exceeding its safe range. Too high temperature will lead to destruction of magnetic properties.

*Technical advisory: Heat tolerance is determined by both grade, but also on the magnet's shape. Low-profile magnets (pancake types) are more susceptible to demagnetization at lower temperatures than taller cylinders. Red status in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 10x3 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	4.91 kg / 4913 g 48.2 N 4 754 Gs	N/A
1 mm	4.18 kg / 4181 g 41.0 N 5 877 Gs	3.76 kg / 3763 g 36.9 N ~0 Gs
2 mm	3.42 kg / 3419 g 33.5 N 5 314 Gs	3.08 kg / 3077 g 30.2 N ~0 Gs
3 mm	2.71 kg / 2711 g 26.6 N 4 732 Gs	2.44 kg / 2440 g 23.9 N ~0 Gs
5 mm	1.59 kg / 1595 g 15.6 N 3 630 Gs	1.44 kg / 1435 g 14.1 N ~0 Gs
10 mm	0.37 kg / 369 g 3.6 N 1 747 Gs	0.33 kg / 333 g 3.3 N ~0 Gs
20 mm	0.03 kg / 28 g 0.3 N 483 Gs	0.03 kg / 25 g 0.2 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 48 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two strong neodymiums interact from a wider radius than a magnet and steel combination. The setup of magnet-to-magnet produces a massive flux and a larger range of operation. Designing a strong closure? Apply two magnets instead of a neodymium and a steel. Remember that when connecting a pair of magnets, the pinch force is extreme. The levitation is slightly lower than the connection force, but still impressive.
*Flux density for N-N configuration is approximately ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).

Table 7: Hazards (electronics) - warnings
MW 10x3 / N38

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

Powerful magnet radiation is a real danger to electronic devices as well as pacemakers. These magnets produce a field that prevents correct functioning of digital equipment. Notice: the invisible magnetic field passes through tissues and housings. Special caution must be taken by people with cochlear implants and drug dispensers. The risk also applies to: mechanical watches, car keys, membranes, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MW 10x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	35.27 km/h (9.80 m/s)	0.08 J
30 mm	60.88 km/h (16.91 m/s)	0.25 J
50 mm	78.60 km/h (21.83 m/s)	0.42 J
100 mm	111.15 km/h (30.88 m/s)	0.84 J

Neodymium magnets are delicate – a strong collision with metal causes immediate chipping. Watch the impact speed – a magnet released freely speeds with massive force. Striking energy can destroy the magnet or injury to fingers. Hold the magnet firmly during installation so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when working with large magnets.

Table 9: Coating parameters (durability)
MW 10x3 / 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: Electrical data (P_c)
MW 10x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	2 694 Mx	26.9 µWb
P_c Coefficient	0.40	Low (Flat)

Flux value emitted by the pole surface. Essential parameter in coil applications as well as sensors. P_c value determines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 10x3 / N38

Environment	Effective steel pull	Effect
Air (land)	2.15 kg	Standard
Water (riverbed)	2.46 kg (+0.31 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!

Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.

1. Sliding resistance

*Warning: On a vertical surface, the magnet holds merely ~20% of its max power.

2. Steel thickness impact

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.40

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 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%

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: 010008-2025

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MW 20x18 / N38 - cylindrical magnet

23.54 ZŁ brutto / pcs

The offered product is an incredibly powerful cylindrical magnet, made from modern NdFeB material, which, with dimensions of Ø10x3 mm, guarantees maximum efficiency. The MW 10x3 / N38 component features high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 2.15 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

It finds application in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 21.04 N with a weight of only 1.77 g, this rod is indispensable in miniature devices and wherever every gram matters.

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., 10.1 mm) using two-component epoxy glues. To ensure stability in industry, specialized industrial adhesives 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 modeling and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø10x3), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.

This model is characterized by dimensions Ø10x3 mm, which, at a weight of 1.77 g, makes it an element with impressive magnetic energy density. The value of 21.04 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.77 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.

This rod magnet is magnetized axially (along the height of 3 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.

Strengths as well as weaknesses of neodymium magnets.

Benefits

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

They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
They feature excellent resistance to magnetism drop when exposed to external fields,
Thanks to the elegant finish, the surface of nickel, gold-plated, or silver-plated gives an modern appearance,
Neodymium magnets create maximum magnetic induction on a contact point, which increases force concentration,
Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
Thanks to freedom in shaping and the capacity to adapt to unusual requirements,
Fundamental importance in advanced technology sectors – they serve a role in data components, drive modules, advanced medical instruments, and technologically advanced constructions.
Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which allows their use in compact constructions

Cons

Disadvantages of NdFeB magnets:

They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
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, 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 usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
Limited possibility of producing nuts in the magnet and complex shapes - preferred is a housing - mounting mechanism.
Possible danger to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these products can be problematic in diagnostics medical in case of swallowing.
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?

The force parameter is a theoretical maximum value executed under specific, ideal conditions:

with the contact of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
possessing a thickness of at least 10 mm to avoid saturation
with a plane cleaned and smooth
with total lack of distance (no impurities)
under axial force direction (90-degree angle)
in stable room temperature

Magnet lifting force in use – key factors

In practice, the real power is determined by several key aspects, ranked from crucial:

Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) significantly weakens 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 holding force drops drastically, often to levels of 20-30% of the maximum value.
Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
Metal type – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
Surface condition – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, however under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate lowers the holding force.

H&S for magnets

Nickel allergy

Medical facts indicate that nickel (the usual finish) is a potent allergen. If you have an allergy, refrain from direct skin contact or choose coated magnets.

Bodily injuries

Watch your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!

Medical interference

Patients with a ICD should maintain an absolute distance from magnets. The magnetic field can interfere with the operation of the life-saving device.

Machining danger

Machining of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Impact on smartphones

A strong magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Maintain magnets near a smartphone to prevent damaging the sensors.

Safe operation

Handle magnets with awareness. Their immense force can surprise even professionals. Plan your moves and do not underestimate their force.

Eye protection

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Permanent damage

Control the heat. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.

Product not for children

Always store magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are life-threatening.

Safe distance

Do not bring magnets near a wallet, computer, or TV. The magnetic field can permanently damage these devices and erase data from cards.

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

MW 10x3 / N38 - cylindrical magnet

Detailed specification - MW 10x3 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the assembly - report

Table 1: Static pull force (force vs gap) - characteristics MW 10x3 / N38

Table 2: Sliding capacity (vertical surface) MW 10x3 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MW 10x3 / N38

Table 4: Steel thickness (saturation) - power losses MW 10x3 / N38

Table 5: Working in heat (material behavior) - power drop MW 10x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MW 10x3 / N38

Table 7: Hazards (electronics) - warnings MW 10x3 / N38

Table 8: Collisions (cracking risk) - collision effects MW 10x3 / N38

Table 9: Coating parameters (durability) MW 10x3 / N38

Table 10: Electrical data (Pc) MW 10x3 / N38

Table 11: Underwater work (magnet fishing) MW 10x3 / N38

1. Sliding resistance

2. Steel thickness impact

3. Power loss vs temp

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

Material specification

Environmental data

Pulling force

Magnetic Field

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MW 20x18 / N38 - cylindrical magnet

Strengths as well as weaknesses of neodymium magnets.

Benefits

Cons

Pull force analysis

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

Magnet lifting force in use – key factors

H&S for magnets

Nickel allergy

Bodily injuries

Medical interference

Machining danger

Impact on smartphones

Safe operation

Eye protection

Permanent damage

Product not for children

Safe distance

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - characteristics
MW 10x3 / N38

Table 2: Sliding capacity (vertical surface)
MW 10x3 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 10x3 / N38

Table 4: Steel thickness (saturation) - power losses
MW 10x3 / N38

Table 5: Working in heat (material behavior) - power drop
MW 10x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 10x3 / N38

Table 7: Hazards (electronics) - warnings
MW 10x3 / N38

Table 8: Collisions (cracking risk) - collision effects
MW 10x3 / N38

Table 9: Coating parameters (durability)
MW 10x3 / N38

Table 10: Electrical data (P_c)
MW 10x3 / N38

Table 11: Underwater work (magnet fishing)
MW 10x3 / N38