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MW 12x10 / N38 - cylindrical magnet

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

see specifications »

3.03 ZŁ with VAT / pcs + price for transport

2.46 ZŁ net + 23% VAT / pcs

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Parameters along with form of neodymium magnets can be checked with our modular calculator.

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Technical details - 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

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 312 - 380 °C
Curie Temperature TF 593 - 716 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Technical analysis of the magnet - data

The following data constitute the direct effect of a engineering calculation. Results rely on algorithms for the material Nd2Fe14B. Operational performance may deviate from the simulation results. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs distance) - characteristics
MW 12x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5308 Gs
530.8 mT
 4.83 kg / 10.65 LBS
4830.0 g / 47.4 N
 warning
1 mm 4424 Gs
442.4 mT
 3.36 kg / 7.40 LBS
3355.3 g / 32.9 N
 warning
2 mm 3585 Gs
358.5 mT
 2.20 kg / 4.86 LBS
2203.4 g / 21.6 N
 warning
3 mm 2857 Gs
285.7 mT
 1.40 kg / 3.08 LBS
1399.2 g / 13.7 N
 weak grip
5 mm 1787 Gs
178.7 mT
 0.55 kg / 1.21 LBS
547.8 g / 5.4 N
 weak grip
10 mm 622 Gs
62.2 mT
 0.07 kg / 0.15 LBS
66.3 g / 0.7 N
 weak grip
15 mm 272 Gs
27.2 mT
 0.01 kg / 0.03 LBS
12.7 g / 0.1 N
 weak grip
20 mm 141 Gs
14.1 mT
 0.00 kg / 0.01 LBS
3.4 g / 0.0 N
 weak grip
30 mm 52 Gs
5.2 mT
 0.00 kg / 0.00 LBS
0.5 g / 0.0 N
 weak grip
50 mm 13 Gs
1.3 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 weak grip
Grip strength decreases significantly with every mm of spacing. Keep in mind that even a very thin break (e.g., dirt, paint, veneer) strongly reduces the pull force. Magnetic products hold most effectively during direct contact; gap nullifies the force. See how quickly the parameters drop, when the magnet does not adhere tightly to the metal substrate. When designing the assembly, eliminate unnecessary gaps.

Table 2: Sliding hold (vertical surface)
MW 12x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.97 kg / 2.13 LBS
966.0 g / 9.5 N
1 mm Stal (~0.2) 0.67 kg / 1.48 LBS
672.0 g / 6.6 N
2 mm Stal (~0.2) 0.44 kg / 0.97 LBS
440.0 g / 4.3 N
3 mm Stal (~0.2) 0.28 kg / 0.62 LBS
280.0 g / 2.7 N
5 mm Stal (~0.2) 0.11 kg / 0.24 LBS
110.0 g / 1.1 N
10 mm Stal (~0.2) 0.01 kg / 0.03 LBS
14.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
This section presents the theoretical shear load necessary to initiate the downward movement of the magnet downwards along a vertical steel wall (considering typical friction). The holding force depends on the air gap between the magnet and the metal.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 12x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.45 kg / 3.19 LBS
1449.0 g / 14.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.97 kg / 2.13 LBS
966.0 g / 9.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.48 kg / 1.06 LBS
483.0 g / 4.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.42 kg / 5.32 LBS
2415.0 g / 23.7 N
When mounting a element on a upright surface (e.g., a board), it will only hold just about 20%-30% of its maximum pull force. Gravitational force as well as a low friction coefficient influence the fact that holders slide down easier than they detach. Want to create a wall mount? Note that the sliding force is significantly lower than the maximum static pull force. On a slippery surface, the magnet will slide down under a noticeably lighter weight. Application of an anti-slip pad can significantly improve the result.

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

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.48 kg / 1.06 LBS
483.0 g / 4.7 N
1 mm
25%
 1.21 kg / 2.66 LBS
1207.5 g / 11.8 N
2 mm
50%
 2.42 kg / 5.32 LBS
2415.0 g / 23.7 N
3 mm
75%
 3.62 kg / 7.99 LBS
3622.5 g / 35.5 N
5 mm
100%
 4.83 kg / 10.65 LBS
4830.0 g / 47.4 N
10 mm
100%
 4.83 kg / 10.65 LBS
4830.0 g / 47.4 N
11 mm
100%
 4.83 kg / 10.65 LBS
4830.0 g / 47.4 N
12 mm
100%
 4.83 kg / 10.65 LBS
4830.0 g / 47.4 N
A thin sheet is not enough to conduct the full magnetic flux, which weakens actual performance of the magnet. If you install a neodymium to a too thin substrate, the flux will pass right through and the attraction force will be weaker. To utilize the maximum of this neodymium's potential, you need a suitably thick element of steel. The saturation phenomenon means that on sheet metal structures (e.g., car bodies), the magnet shows lower pull force. We recommend selecting the steel dimension from these parameters.

Table 5: Thermal resistance (material behavior) - power drop
MW 12x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.83 kg / 10.65 LBS
4830.0 g / 47.4 N
 OK
40 °C -2.2% 4.72 kg / 10.41 LBS
4723.7 g / 46.3 N
 OK
60 °C -4.4% 4.62 kg / 10.18 LBS
4617.5 g / 45.3 N
 OK
80 °C -6.6% 4.51 kg / 9.95 LBS
4511.2 g / 44.3 N
100 °C -28.8% 3.44 kg / 7.58 LBS
3439.0 g / 33.7 N
Classic neodymiums lose power past the thermal threshold. Protect against heat – heat can permanently demagnetize this product. As the temperature rises, the neodymium's force momentarily drops. Avoid using this magnet in hot environments higher than its working range. Ignoring the limit will lead to irreversible degradation of magnetic properties.
*Engineering note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Flat magnets (low permeance coefficient) risk losing magnetic properties under lower heat stress than long magnets. Red status in the table points to a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 12x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 19.64 kg / 43.30 LBS
5 928 Gs
2.95 kg / 6.50 LBS
2946 g / 28.9 N
 N/A
1 mm 16.52 kg / 36.43 LBS
9 736 Gs
2.48 kg / 5.46 LBS
2479 g / 24.3 N
 14.87 kg / 32.79 LBS
~0 Gs
2 mm 13.64 kg / 30.08 LBS
8 847 Gs
2.05 kg / 4.51 LBS
2047 g / 20.1 N
 12.28 kg / 27.07 LBS
~0 Gs
3 mm 11.12 kg / 24.51 LBS
7 986 Gs
1.67 kg / 3.68 LBS
1668 g / 16.4 N
 10.01 kg / 22.06 LBS
~0 Gs
5 mm 7.16 kg / 15.79 LBS
6 410 Gs
1.07 kg / 2.37 LBS
1074 g / 10.5 N
 6.45 kg / 14.21 LBS
~0 Gs
10 mm 2.23 kg / 4.91 LBS
3 575 Gs
0.33 kg / 0.74 LBS
334 g / 3.3 N
 2.00 kg / 4.42 LBS
~0 Gs
20 mm 0.27 kg / 0.59 LBS
1 244 Gs
0.04 kg / 0.09 LBS
40 g / 0.4 N
 0.24 kg / 0.54 LBS
~0 Gs
50 mm 0.00 kg / 0.01 LBS
164 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
104 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
70 mm 0.00 kg / 0.00 LBS
70 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
80 mm 0.00 kg / 0.00 LBS
49 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
90 mm 0.00 kg / 0.00 LBS
36 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
100 mm 0.00 kg / 0.00 LBS
27 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two strong neodymiums interact from a significantly greater distance than a magnet and steel setup. The setup of magnet-to-magnet produces a massive flux and a larger range of operation. Planning to create a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Remember that when bringing together two magnets, the impact force is extreme. The repulsion force is slightly lower than the connection force, but still large.
*Field value for N-N configuration reaches ~0 Gs at the geometric center of the gap (due to field cancellation).
Important: Figures apply to sliding force of a pair of identical neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Protective zones (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
Powerful magnet radiation is a real danger to electronics and pacemakers. These neodymiums produce a flux that destroys function of sensitive medical devices. Notice: the unseen radiation passes through tissues and plastic. Special caution must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, car keys, membranes, and displays. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - warning
MW 12x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
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
Neodymium magnets are prone to chipping – a strong collision with metal can result in shattering. Watch the impact speed – a neodymium left loose speeds with massive force. Striking energy can destroy the magnet or painful pinches to skin. Be sure to control the product during installation so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Use safety goggles when playing 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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MW 12x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 105 Mx 61.1 µWb
Pc Coefficient 0.81 High (Stable)
Total magnetic flux emitted by the magnet pole. Essential parameter for generator designers as well as sensors. Pc value determines the magnet's operating point.

Table 11: Physics of underwater searching
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 holds only ~20% of its max power.

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) severely weakens 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 Pc (Permeance Coefficient) = 0.81

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 Pc (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 Pc 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
Chemical composition
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Ecology and recycling (GPSR)
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: 010016-2026
Magnet Unit Converter
Pulling force
Magnetic Induction
Input a value in one of the inputs, and the remaining units change instantly.

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This product is an exceptionally strong cylindrical magnet, manufactured from modern NdFeB material, which, at dimensions of Ø12x10 mm, guarantees maximum efficiency. The MW 12x10 / N38 model is characterized by an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 4.83 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power 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.
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., 12.1 mm) using epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets N38 are strong enough for the majority of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. 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 available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 10 mm. The key parameter here is the holding force amounting to approximately 4.83 kg (force ~47.41 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface 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. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Advantages and disadvantages of rare earth magnets.

Advantages

Apart from their consistent magnetism, neodymium magnets have these key benefits:
  • Their magnetic field is maintained, and after approximately ten years it decreases only by ~1% (according to research),
  • Magnets perfectly protect themselves against loss of magnetization caused by external fields,
  • In other words, due to the shiny layer of silver, the element becomes visually attractive,
  • Magnets exhibit very high magnetic induction on the outer layer,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Due to the potential of free forming and customization to unique solutions, NdFeB magnets can be modeled in a wide range of shapes and sizes, which increases their versatility,
  • Wide application in future technologies – they are utilized in data components, drive modules, medical devices, also modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:
  • At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength 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
  • They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing nuts and complex forms in magnets, we propose using casing - magnetic holder.
  • Health risk related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Furthermore, tiny parts of these products can disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Maximum magnetic pulling force – what it depends on?

The declared magnet strength represents the maximum value, measured under optimal environment, specifically:
  • with the use of a yoke made of low-carbon steel, ensuring full magnetic saturation
  • with a thickness minimum 10 mm
  • characterized by lack of roughness
  • under conditions of gap-free contact (surface-to-surface)
  • for force applied at a right angle (pull-off, not shear)
  • at conditions approx. 20°C

What influences lifting capacity in practice

Real force is affected by working environment parameters, such as (from priority):
  • Distance – the presence of foreign body (paint, dirt, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Steel thickness – too thin sheet does not close the flux, causing part of the flux to be lost to the other side.
  • Metal type – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Base smoothness – the more even the surface, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
  • Temperature influence – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was measured using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Safe handling of neodymium magnets
Implant safety

Medical warning: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Serious injuries

Pinching hazard: The attraction force is so immense that it can result in blood blisters, pinching, and even bone fractures. Use thick gloves.

Handling guide

Use magnets with awareness. Their immense force can surprise even experienced users. Stay alert and respect their force.

Compass and GPS

An intense magnetic field disrupts the functioning of compasses in phones and GPS navigation. Do not bring magnets near a smartphone to prevent breaking the sensors.

Protective goggles

Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Keep away from computers

Intense magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Dust explosion hazard

Powder generated during cutting of magnets is combustible. Do not drill into magnets unless you are an expert.

Do not overheat magnets

Do not overheat. Neodymium magnets are sensitive to temperature. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).

Keep away from children

NdFeB magnets are not toys. Accidental ingestion of several magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates immediate surgery.

Skin irritation risks

Nickel alert: The nickel-copper-nickel coating contains nickel. If an allergic reaction appears, immediately stop working with magnets and wear gloves.

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