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MW 12x10 / 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 010016

GTIN/EAN: 5906301810155

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

8.48 g

Magnetization Direction

↑ axial

Load capacity

4.83 kg / 47.41 N

Magnetic Induction

531.09 mT / 5311 Gs

Coating

[NiCuNi] Nickel

3.03 ZŁ with VAT / pcs + price for transport

2.46 ZŁ net + 23% VAT / pcs

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MW 12x10 / N38 - cylindrical magnet

Specification / characteristics MW 12x10 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010016
GTIN/EAN	5906301810155
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	12 mm [±0,1 mm]
Height	10 mm [±0,1 mm]
Weight	8.48 g
Magnetization Direction	↑ axial
Load capacity ~ ?	4.83 kg / 47.41 N
Magnetic Induction ~ ?	531.09 mT / 5311 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x10 / 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 simulation of the assembly - data

The following values represent the result of a mathematical analysis. Values are based on algorithms for the class Nd₂Fe₁₄B. Real-world conditions might slightly differ from theoretical values. Use these data as a reference point during assembly planning.

Table 1: Static force (force vs distance) - interaction chart
MW 12x10 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	5308 Gs 530.8 mT	4.83 kg / 4830.0 g 47.4 N	strong
1 mm	4424 Gs 442.4 mT	3.36 kg / 3355.3 g 32.9 N	strong
2 mm	3585 Gs 358.5 mT	2.20 kg / 2203.4 g 21.6 N	strong
3 mm	2857 Gs 285.7 mT	1.40 kg / 1399.2 g 13.7 N	low risk
5 mm	1787 Gs 178.7 mT	0.55 kg / 547.8 g 5.4 N	low risk
10 mm	622 Gs 62.2 mT	0.07 kg / 66.3 g 0.7 N	low risk
15 mm	272 Gs 27.2 mT	0.01 kg / 12.7 g 0.1 N	low risk
20 mm	141 Gs 14.1 mT	0.00 kg / 3.4 g 0.0 N	low risk
30 mm	52 Gs 5.2 mT	0.00 kg / 0.5 g 0.0 N	low risk
50 mm	13 Gs 1.3 mT	0.00 kg / 0.0 g 0.0 N	low risk

Magnetic force decreases drastically with every mm of spacing. Remember that even a microscopic distance (e.g., dirt, varnish, veneer) noticeably diminishes the holding power. Neodymiums work most effectively during direct contact; air break drastically cuts the power. Observe how quickly the parameters plummet, when the product does not touch directly to the steel surface. When planning the arrangement, discard unnecessary gaps.

Table 2: Sliding capacity (wall)
MW 12x10 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.97 kg / 966.0 g 9.5 N
1 mm	Stal (~0.2)	0.67 kg / 672.0 g 6.6 N
2 mm	Stal (~0.2)	0.44 kg / 440.0 g 4.3 N
3 mm	Stal (~0.2)	0.28 kg / 280.0 g 2.7 N
5 mm	Stal (~0.2)	0.11 kg / 110.0 g 1.1 N
10 mm	Stal (~0.2)	0.01 kg / 14.0 g 0.1 N
15 mm	Stal (~0.2)	0.00 kg / 2.0 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 theoretical shear load needed to initiate the slippage of the magnet downwards on a vertical metal surface (assuming typical friction). This value depends on the distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MW 12x10 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.45 kg / 1449.0 g 14.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.97 kg / 966.0 g 9.5 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.48 kg / 483.0 g 4.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.42 kg / 2415.0 g 23.7 N

When hanging a magnet on a vertical surface (e.g., a fridge), it will maintain only about 1/5 of nominal attraction strength. Gravitational force and a weak degree of grip influence the fact that holders move down faster than they pop off the substrate. Want to create a hanger? Consider that the shear force is noticeably lower than the maximum static pull force. On a smooth steel, the holder will slide down under a significantly smaller load. Application of an anti-slip pad can effectively increase the grip.

Table 4: Material efficiency (saturation) - power losses
MW 12x10 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.48 kg / 483.0 g 4.7 N
1 mm	25%	1.21 kg / 1207.5 g 11.8 N
2 mm	50%	2.42 kg / 2415.0 g 23.7 N
5 mm	100%	4.83 kg / 4830.0 g 47.4 N
10 mm	100%	4.83 kg / 4830.0 g 47.4 N

A too thin steel is not enough to absorb the full magnetic flux, which wastes potential of the holder. Should you attach a powerful product to a too thin substrate, the field will penetrate right through and the holding will be smaller. To achieve full efficiency of this neodymium's power, you need a suitably thick element of steel. The saturation effect means that on delicate walls (e.g., appliance housings), the holder shows lower pull force. We suggest choosing the steel thickness according to the table below.

Table 5: Thermal stability (stability) - thermal limit
MW 12x10 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	4.83 kg / 4830.0 g 47.4 N	OK
40 °C	-2.2%	4.72 kg / 4723.7 g 46.3 N	OK
60 °C	-4.4%	4.62 kg / 4617.5 g 45.3 N	OK
80 °C	-6.6%	4.51 kg / 4511.2 g 44.3 N
100 °C	-28.8%	3.44 kg / 3439.0 g 33.7 N

Standard neodymium magnets change their properties power past the thermal threshold. Protect against heat – heat can permanently destroy this product. As the temperature rises, the magnet's capacity briefly lowers. Refrain from using this product close to ovens exceeding its operating temperature limit. Exceeding the critical threshold will lead to permanent loss of magnetism.

*Technical advisory: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Thin 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 12x10 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	19.64 kg / 19641 g 192.7 N 5 928 Gs	N/A
1 mm	16.52 kg / 16525 g 162.1 N 9 736 Gs	14.87 kg / 14872 g 145.9 N ~0 Gs
2 mm	13.64 kg / 13644 g 133.9 N 8 847 Gs	12.28 kg / 12280 g 120.5 N ~0 Gs
3 mm	11.12 kg / 11118 g 109.1 N 7 986 Gs	10.01 kg / 10006 g 98.2 N ~0 Gs
5 mm	7.16 kg / 7161 g 70.3 N 6 410 Gs	6.45 kg / 6445 g 63.2 N ~0 Gs
10 mm	2.23 kg / 2228 g 21.9 N 3 575 Gs	2.00 kg / 2005 g 19.7 N ~0 Gs
20 mm	0.27 kg / 270 g 2.6 N 1 244 Gs	0.24 kg / 243 g 2.4 N ~0 Gs
50 mm	0.00 kg / 5 g 0.0 N 164 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnetic products interact from a wider radius than a neodymium and metal combination. Such a system of magnet-to-magnet generates a stronger field and a further horizon of operation. Planning to create a strong closure? Use a pair of magnets instead of one magnet and a steel. Be careful that when bringing together two magnets, the impact force is huge. The levitation is marginally weaker than the attraction, but still large.
*Flux density between like poles reaches ~0 Gs in the exact middle between the magnets (due to field cancellation).

Table 7: Hazards (implants) - precautionary measures
MW 12x10 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	7.5 cm
Hearing aid	10 Gs (1.0 mT)	6.0 cm
Timepiece	20 Gs (2.0 mT)	4.5 cm
Mobile device	40 Gs (4.0 mT)	3.5 cm
Car key	50 Gs (5.0 mT)	3.5 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field is a large risk to IT equipment as well as pacemakers. These magnets generate a flux that prevents correct functioning of digital equipment. Notice: the invisible magnetic field penetrates the body and housings. Increased vigilance must be taken by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, remotes, speakers, and screens. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MW 12x10 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	24.27 km/h (6.74 m/s)	0.19 J
30 mm	41.69 km/h (11.58 m/s)	0.57 J
50 mm	53.82 km/h (14.95 m/s)	0.95 J
100 mm	76.11 km/h (21.14 m/s)	1.90 J

Magnetic elements are delicate – a violent impact against metal can result in shattering. Watch the impact speed – a magnet released freely becomes dangerous. Kinetic force can trigger coating fragments or dangerous crushing to skin. Be sure to control the product during bringing near metal so it doesn't hit with great force against the steel surface. A collision at high speed ends with a crack of the magnet. Wear eye protection when handling with large magnets.

Table 9: Coating parameters (durability)
MW 12x10 / 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 (Flux)
MW 12x10 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	6 105 Mx	61.1 µWb
P_c Coefficient	0.81	High (Stable)

Total magnetic flux emitted by the magnet pole. Key data when building generators as well as sensors. The P_c coefficient determines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 12x10 / N38

Environment	Effective steel pull	Effect
Air (land)	4.83 kg	Standard
Water (riverbed)	5.53 kg (+0.70 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!

Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains merely approx. 20-30% of its max power.

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.

3. Power loss vs temp

*For N38 material, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.81

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

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: 010016-2025

Measurement Calculator

Pulling force

Force in kg

Pounds (lbs)

Magnetic Induction

Induction (Gs)

Induction (T)

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The presented product is a very strong cylinder magnet, composed of advanced NdFeB material, which, with dimensions of Ø12x10 mm, guarantees maximum efficiency. The MW 12x10 / N38 component boasts high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 4.83 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

This model is perfect for building generators, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 47.41 N with a weight of only 8.48 g, this rod is indispensable in miniature devices and wherever low weight is crucial.

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 precision component. To ensure long-term durability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø12x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.

This model is characterized by dimensions Ø12x10 mm, which, at a weight of 8.48 g, makes it an element with high magnetic energy density. The value of 47.41 N means that the magnet is capable of holding a weight many times exceeding its own mass of 8.48 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.

This cylinder is magnetized axially (along the height of 10 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.

Advantages and disadvantages of rare earth magnets.

Advantages

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

Their power remains stable, and after around 10 years it drops only by ~1% (theoretically),
Neodymium magnets are highly resistant to demagnetization caused by external interference,
In other words, due to the shiny layer of silver, the element gains visual value,
They feature high magnetic induction at the operating surface, which improves attraction properties,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
Possibility of precise machining and optimizing to complex needs,
Significant place in future technologies – they are used in data components, drive modules, precision medical tools, and other advanced devices.
Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Weaknesses

What to avoid - cons of neodymium magnets: tips and applications.

To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
Limited possibility of creating nuts in the magnet and complex forms - recommended is cover - mounting mechanism.
Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these magnets are able to disrupt the diagnostic process medical when they are in the body.
With large orders the cost of neodymium magnets is economically unviable,

Holding force characteristics

Maximum holding power of the magnet – what contributes to it?

The lifting capacity listed is a measurement result performed under standard conditions:

with the use of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
whose thickness reaches at least 10 mm
with a surface cleaned and smooth
with direct contact (without coatings)
during detachment in a direction perpendicular to the mounting surface
at room temperature

Impact of factors on magnetic holding capacity in practice

Please note that the working load may be lower subject to elements below, starting with the most relevant:

Air gap (betwixt the magnet and the plate), since even a very small distance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
Steel type – low-carbon steel attracts best. Alloy admixtures lower magnetic properties and lifting capacity.
Base smoothness – the more even the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
Thermal conditions – 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 testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate reduces the lifting capacity.

Warnings

Threat to navigation

Remember: neodymium magnets generate a field that disrupts precision electronics. Keep a safe distance from your phone, device, and GPS.

Avoid contact if allergic

Certain individuals have a sensitization to nickel, which is the typical protective layer for NdFeB magnets. Extended handling might lead to dermatitis. It is best to use protective gloves.

Do not underestimate power

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

Do not drill into magnets

Powder generated during machining of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Thermal limits

Keep cool. NdFeB magnets are sensitive to heat. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Pinching danger

Big blocks can break fingers in a fraction of a second. Never place your hand betwixt two attracting surfaces.

No play value

NdFeB magnets are not toys. Accidental ingestion of multiple magnets can lead to them pinching intestinal walls, which poses a severe health hazard and necessitates urgent medical intervention.

Health Danger

Individuals with a heart stimulator should keep an absolute distance from magnets. The magnetic field can interfere with the operation of the life-saving device.

Cards and drives

Data protection: Strong magnets can damage data carriers and delicate electronics (heart implants, medical aids, mechanical watches).

Fragile material

Despite metallic appearance, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

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

MW 12x10 / N38 - cylindrical magnet

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MW 12x10 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the assembly - data

1. Wall mount (shear)

2. Efficiency vs thickness

3. Power loss vs temp

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

Elemental analysis

Environmental data

Pulling force

Magnetic Induction

See also deals

MW 16x9 / N38 - cylindrical magnet

MPL 80x40x15 / N38 - lamellar magnet

UMT 12x20 black / N38 - board holder

UMC 16x5/2x5 / N38 - cylindrical magnetic holder

Advantages and disadvantages of rare earth magnets.

Advantages

Weaknesses

Holding force characteristics

Maximum holding power of the magnet – what contributes to it?

Impact of factors on magnetic holding capacity in practice

Threat to navigation

Avoid contact if allergic

Do not underestimate power

Do not drill into magnets

Thermal limits

Pinching danger

No play value

Health Danger

Cards and drives

Fragile material

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C