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MW 10x8 / 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 010013

GTIN/EAN: 5906301810124

5.00

Diameter Ø

10 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

4.71 g

Magnetization Direction

↑ axial

Load capacity

3.38 kg / 33.16 N

Magnetic Induction

525.10 mT / 5251 Gs

Coating

[NiCuNi] Nickel

technical details »

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Detailed specification - MW 10x8 / N38 - cylindrical magnet

Specification / characteristics - MW 10x8 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010013
GTIN/EAN	5906301810124
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	8 mm [±0,1 mm]
Weight	4.71 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.38 kg / 33.16 N
Magnetic Induction ~ ?	525.10 mT / 5251 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 10x8 / 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 assembly - technical parameters

These information constitute the result of a mathematical simulation. Values rely on models for the class Nd₂Fe₁₄B. Actual performance might slightly differ from theoretical values. Treat these data as a reference point during assembly planning.

Table 1: Static force (pull vs distance) - characteristics
MW 10x8 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	5247 Gs 524.7 mT	3.38 kg / 3380.0 g 33.2 N	warning
1 mm	4204 Gs 420.4 mT	2.17 kg / 2169.6 g 21.3 N	warning
2 mm	3243 Gs 324.3 mT	1.29 kg / 1291.0 g 12.7 N	low risk
3 mm	2454 Gs 245.4 mT	0.74 kg / 739.6 g 7.3 N	low risk
5 mm	1403 Gs 140.3 mT	0.24 kg / 241.5 g 2.4 N	low risk
10 mm	428 Gs 42.8 mT	0.02 kg / 22.5 g 0.2 N	low risk
15 mm	177 Gs 17.7 mT	0.00 kg / 3.8 g 0.0 N	low risk
20 mm	89 Gs 8.9 mT	0.00 kg / 1.0 g 0.0 N	low risk
30 mm	31 Gs 3.1 mT	0.00 kg / 0.1 g 0.0 N	low risk
50 mm	8 Gs 0.8 mT	0.00 kg / 0.0 g 0.0 N	low risk

Grip strength drops drastically with every mm of distance. Note that even the smallest gap (e.g., dirt, varnish, veneer) strongly reduces the pull force. Neodymiums hold optimally during direct contact; gap nullifies the force. Observe how rapidly the load capacity plummet, when the product does not adhere tightly to the metal substrate. When designing the assembly, eliminate unnecessary gaps.

Table 2: Vertical load (vertical surface)
MW 10x8 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.68 kg / 676.0 g 6.6 N
1 mm	Stal (~0.2)	0.43 kg / 434.0 g 4.3 N
2 mm	Stal (~0.2)	0.26 kg / 258.0 g 2.5 N
3 mm	Stal (~0.2)	0.15 kg / 148.0 g 1.5 N
5 mm	Stal (~0.2)	0.05 kg / 48.0 g 0.5 N
10 mm	Stal (~0.2)	0.00 kg / 4.0 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

This section presents the theoretical weight limit needed to initiate the downward movement of the magnet downwards on a upright steel plate (assuming typical friction coefficient). This value is relative to the separation distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 10x8 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.01 kg / 1014.0 g 9.9 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.68 kg / 676.0 g 6.6 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.34 kg / 338.0 g 3.3 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.69 kg / 1690.0 g 16.6 N

When mounting a element on a vertical wall (e.g., a car body), it will only hold barely approx. 1/5 of its nominal power. Gravity and a low friction coefficient mean that magnets move down easier than they pop off the substrate. Planning a vertical fastening? Consider that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the holder will give way down under a significantly smaller load. Using a rubber pad can effectively raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MW 10x8 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.34 kg / 338.0 g 3.3 N
1 mm	25%	0.85 kg / 845.0 g 8.3 N
2 mm	50%	1.69 kg / 1690.0 g 16.6 N
5 mm	100%	3.38 kg / 3380.0 g 33.2 N
10 mm	100%	3.38 kg / 3380.0 g 33.2 N

A too thin steel is not enough to focus the entire magnetic field, which wastes potential of the holder. If you install a neodymium to a thin surface, the magnetism will pass right through and the pull force will drop sharply. To squeeze 100% of this magnet's potential, you need a suitably thick piece of steel. The saturation effect means that on sheet metal structures (e.g., appliance housings), the magnet works worse. We advise picking the steel cross-section based on the following data.

Table 5: Thermal resistance (material behavior) - thermal limit
MW 10x8 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	3.38 kg / 3380.0 g 33.2 N	OK
40 °C	-2.2%	3.31 kg / 3305.6 g 32.4 N	OK
60 °C	-4.4%	3.23 kg / 3231.3 g 31.7 N	OK
80 °C	-6.6%	3.16 kg / 3156.9 g 31.0 N
100 °C	-28.8%	2.41 kg / 2406.6 g 23.6 N

Ordinary NdFeB products lose strength after exceeding the maximum temperature. Avoid high temperatures – excessive heat can irreversibly destroy this product. With every degree above norm, the neodymium's capacity temporarily decreases. Avoid using this magnet close to ovens higher than its operating temperature limit. Too high temperature will result in permanent loss of magnetism.

*Engineering note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) are more susceptible to demagnetization at lower temperatures than taller cylinders. Red status in the table points to a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 10x8 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	13.33 kg / 13331 g 130.8 N 5 906 Gs	N/A
1 mm	10.82 kg / 10820 g 106.1 N 9 454 Gs	9.74 kg / 9738 g 95.5 N ~0 Gs
2 mm	8.56 kg / 8557 g 83.9 N 8 408 Gs	7.70 kg / 7701 g 75.5 N ~0 Gs
3 mm	6.65 kg / 6646 g 65.2 N 7 410 Gs	5.98 kg / 5982 g 58.7 N ~0 Gs
5 mm	3.86 kg / 3864 g 37.9 N 5 650 Gs	3.48 kg / 3478 g 34.1 N ~0 Gs
10 mm	0.95 kg / 953 g 9.3 N 2 805 Gs	0.86 kg / 857 g 8.4 N ~0 Gs
20 mm	0.09 kg / 89 g 0.9 N 857 Gs	0.08 kg / 80 g 0.8 N ~0 Gs
50 mm	0.00 kg / 1 g 0.0 N 101 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnetic products interact from a wider radius than a magnet and steel setup. The connection of two magnets generates a stronger field and a further horizon of performance. Want to build a strong closure? Use a pair of magnets instead of a neodymium and a steel. Be careful that when bringing together two magnets, the impact force is extreme. The levitation is slightly lower than the attraction, but still large.
*The magnetic induction between like poles drops to ~0 Gs at the geometric center of the gap (resulting from vector opposition).

Table 7: Hazards (electronics) - warnings
MW 10x8 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	6.0 cm
Hearing aid	10 Gs (1.0 mT)	5.0 cm
Mechanical watch	20 Gs (2.0 mT)	4.0 cm
Mobile device	40 Gs (4.0 mT)	3.0 cm
Remote	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 poses a large risk to electronics as well as medical implants. These neodymiums generate a flux that destroys function of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and housings. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, car keys, speakers, and displays. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - warning
MW 10x8 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	27.13 km/h (7.54 m/s)	0.13 J
30 mm	46.80 km/h (13.00 m/s)	0.40 J
50 mm	60.41 km/h (16.78 m/s)	0.66 J
100 mm	85.43 km/h (23.73 m/s)	1.33 J

Neodymium magnets are very brittle – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Kinetic force can trigger coating fragments or dangerous crushing to fingers. Be sure to control the product during installation so it doesn't hit with great force against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Use safety goggles when handling with large magnets.

Table 9: Corrosion resistance
MW 10x8 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (P_c)
MW 10x8 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	4 183 Mx	41.8 µWb
P_c Coefficient	0.79	High (Stable)

Total magnetic flux passing through the magnet pole. Key data for generator designers as well as sensors. P_c value determines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 10x8 / N38

Environment	Effective steel pull	Effect
Air (land)	3.38 kg	Standard
Water (riverbed)	3.87 kg (+0.49 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!

Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Caution: On a vertical wall, the magnet holds only approx. 20-30% of its nominal pull.

2. Steel thickness impact

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

3. Temperature resistance

*For N38 grade, 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) = 0.79

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

Elemental analysis

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: 010013-2025

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The presented product is a very strong cylinder magnet, composed of durable NdFeB material, which, with dimensions of Ø10x8 mm, guarantees optimal power. The MW 10x8 / N38 component features a tolerance of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 3.38 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

This model is ideal for building electric motors, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 33.16 N with a weight of only 4.71 g, this rod is indispensable in electronics and wherever every gram matters.

Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in 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 suitable for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø10x8), 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 Ø10x8 mm, which, at a weight of 4.71 g, makes it an element with impressive magnetic energy density. The value of 33.16 N means that the magnet is capable of holding a weight many times exceeding its own mass of 4.71 g. 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 10 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 through the diameter if your project requires it.

Pros as well as cons of rare earth magnets.

Pros

Besides their remarkable field intensity, neodymium magnets offer the following advantages:

They have unchanged lifting capacity, and over around 10 years their attraction force decreases symbolically – ~1% (according to theory),
Neodymium magnets are characterized by highly resistant to demagnetization caused by external magnetic fields,
By using a lustrous layer of gold, the element acquires an nice look,
The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Possibility of custom machining as well as modifying to concrete requirements,
Key role in modern technologies – they serve a role in computer drives, electric motors, medical devices, as well as industrial machines.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
Limited possibility of producing threads in the magnet and complex shapes - preferred is cover - mounting mechanism.
Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these devices can be problematic in diagnostics medical when they are in the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

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

The declared magnet strength concerns the maximum value, obtained under optimal environment, meaning:

using a plate made of mild steel, acting as a circuit closing element
possessing a massiveness of min. 10 mm to avoid saturation
with an ideally smooth touching surface
without the slightest clearance between the magnet and steel
under axial application of breakaway force (90-degree angle)
at standard ambient temperature

Practical lifting capacity: influencing factors

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

Distance (betwixt the magnet and the metal), as even a very small distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, corrosion or dirt).
Load vector – highest force is reached only during perpendicular pulling. The shear force of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
Steel thickness – too thin plate causes magnetic saturation, causing part of the power to be escaped into the air.
Chemical composition of the base – mild steel attracts best. Alloy admixtures reduce magnetic permeability and holding force.
Surface structure – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was determined with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with neodymium magnets

Keep away from computers

Data protection: Strong magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).

Shattering risk

Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Metal Allergy

Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, refrain from touching magnets with bare hands and select coated magnets.

Combustion hazard

Dust generated during cutting of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Thermal limits

Standard neodymium magnets (N-type) lose power when the temperature exceeds 80°C. The loss of strength is permanent.

No play value

NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them attracting across intestines, which poses a critical condition and necessitates immediate surgery.

Keep away from electronics

A strong magnetic field disrupts the functioning of magnetometers in phones and GPS navigation. Keep magnets close to a device to avoid breaking the sensors.

Hand protection

Danger of trauma: The pulling power is so immense that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.

Implant safety

Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Handling guide

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

Safety First! More info about hazards in the article: Safety of working with magnets.

MW 10x8 / N38 - cylindrical magnet

Detailed specification - MW 10x8 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the assembly - technical parameters

Table 1: Static force (pull vs distance) - characteristics MW 10x8 / N38

Table 2: Vertical load (vertical surface) MW 10x8 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MW 10x8 / N38

Table 4: Material efficiency (substrate influence) - power losses MW 10x8 / N38

Table 5: Thermal resistance (material behavior) - thermal limit MW 10x8 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range MW 10x8 / N38

Table 7: Hazards (electronics) - warnings MW 10x8 / N38

Table 8: Collisions (kinetic energy) - warning MW 10x8 / N38

Table 9: Corrosion resistance MW 10x8 / N38

Table 10: Electrical data (Pc) MW 10x8 / N38

Table 11: Underwater work (magnet fishing) MW 10x8 / N38

1. Vertical hold

2. Steel thickness impact

3. Temperature resistance

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

Elemental analysis

Environmental data

Magnet pull force

Magnetic Field

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Pros as well as cons of rare earth magnets.

Pros

Disadvantages

Pull force analysis

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

Practical lifting capacity: influencing factors

Safety rules for work with neodymium magnets

Keep away from computers

Shattering risk

Metal Allergy

Combustion hazard

Thermal limits

No play value

Keep away from electronics

Hand protection

Implant safety

Handling guide

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - characteristics
MW 10x8 / N38

Table 2: Vertical load (vertical surface)
MW 10x8 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 10x8 / N38

Table 4: Material efficiency (substrate influence) - power losses
MW 10x8 / N38

Table 5: Thermal resistance (material behavior) - thermal limit
MW 10x8 / N38

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 10x8 / N38

Table 7: Hazards (electronics) - warnings
MW 10x8 / N38

Table 8: Collisions (kinetic energy) - warning
MW 10x8 / N38

Table 9: Corrosion resistance
MW 10x8 / N38

Table 10: Electrical data (P_c)
MW 10x8 / N38

Table 11: Underwater work (magnet fishing)
MW 10x8 / N38