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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

3.03 with VAT / pcs + price for transport

2.46 ZŁ net + 23% VAT / pcs

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Product card - 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 modeling of the product - data

The following information constitute the result of a mathematical simulation. Values rely on algorithms for the material Nd2Fe14B. Operational conditions might slightly differ. Please consider these calculations as a supplementary guide for designers.

Table 1: Static pull force (pull vs distance) - power drop
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 pounds
4830.0 g / 47.4 N
medium risk
1 mm 4424 Gs
442.4 mT
3.36 kg / 7.40 pounds
3355.3 g / 32.9 N
medium risk
2 mm 3585 Gs
358.5 mT
2.20 kg / 4.86 pounds
2203.4 g / 21.6 N
medium risk
3 mm 2857 Gs
285.7 mT
1.40 kg / 3.08 pounds
1399.2 g / 13.7 N
weak grip
5 mm 1787 Gs
178.7 mT
0.55 kg / 1.21 pounds
547.8 g / 5.4 N
weak grip
10 mm 622 Gs
62.2 mT
0.07 kg / 0.15 pounds
66.3 g / 0.7 N
weak grip
15 mm 272 Gs
27.2 mT
0.01 kg / 0.03 pounds
12.7 g / 0.1 N
weak grip
20 mm 141 Gs
14.1 mT
0.00 kg / 0.01 pounds
3.4 g / 0.0 N
weak grip
30 mm 52 Gs
5.2 mT
0.00 kg / 0.00 pounds
0.5 g / 0.0 N
weak grip
50 mm 13 Gs
1.3 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

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

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.97 kg / 2.13 pounds
966.0 g / 9.5 N
1 mm Stal (~0.2) 0.67 kg / 1.48 pounds
672.0 g / 6.6 N
2 mm Stal (~0.2) 0.44 kg / 0.97 pounds
440.0 g / 4.3 N
3 mm Stal (~0.2) 0.28 kg / 0.62 pounds
280.0 g / 2.7 N
5 mm Stal (~0.2) 0.11 kg / 0.24 pounds
110.0 g / 1.1 N
10 mm Stal (~0.2) 0.01 kg / 0.03 pounds
14.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - vertical pull
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 pounds
1449.0 g / 14.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.97 kg / 2.13 pounds
966.0 g / 9.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.48 kg / 1.06 pounds
483.0 g / 4.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.42 kg / 5.32 pounds
2415.0 g / 23.7 N

Table 4: Steel thickness (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 pounds
483.0 g / 4.7 N
1 mm
25%
1.21 kg / 2.66 pounds
1207.5 g / 11.8 N
2 mm
50%
2.42 kg / 5.32 pounds
2415.0 g / 23.7 N
3 mm
75%
3.62 kg / 7.99 pounds
3622.5 g / 35.5 N
5 mm
100%
4.83 kg / 10.65 pounds
4830.0 g / 47.4 N
10 mm
100%
4.83 kg / 10.65 pounds
4830.0 g / 47.4 N
11 mm
100%
4.83 kg / 10.65 pounds
4830.0 g / 47.4 N
12 mm
100%
4.83 kg / 10.65 pounds
4830.0 g / 47.4 N

Table 5: Working in heat (stability) - thermal limit
MW 12x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.83 kg / 10.65 pounds
4830.0 g / 47.4 N
OK
40 °C -2.2% 4.72 kg / 10.41 pounds
4723.7 g / 46.3 N
OK
60 °C -4.4% 4.62 kg / 10.18 pounds
4617.5 g / 45.3 N
OK
80 °C -6.6% 4.51 kg / 9.95 pounds
4511.2 g / 44.3 N
100 °C -28.8% 3.44 kg / 7.58 pounds
3439.0 g / 33.7 N

Table 6: Two magnets (attraction) - forces in the system
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 pounds
5 928 Gs
2.95 kg / 6.50 pounds
2946 g / 28.9 N
N/A
1 mm 16.52 kg / 36.43 pounds
9 736 Gs
2.48 kg / 5.46 pounds
2479 g / 24.3 N
14.87 kg / 32.79 pounds
~0 Gs
2 mm 13.64 kg / 30.08 pounds
8 847 Gs
2.05 kg / 4.51 pounds
2047 g / 20.1 N
12.28 kg / 27.07 pounds
~0 Gs
3 mm 11.12 kg / 24.51 pounds
7 986 Gs
1.67 kg / 3.68 pounds
1668 g / 16.4 N
10.01 kg / 22.06 pounds
~0 Gs
5 mm 7.16 kg / 15.79 pounds
6 410 Gs
1.07 kg / 2.37 pounds
1074 g / 10.5 N
6.45 kg / 14.21 pounds
~0 Gs
10 mm 2.23 kg / 4.91 pounds
3 575 Gs
0.33 kg / 0.74 pounds
334 g / 3.3 N
2.00 kg / 4.42 pounds
~0 Gs
20 mm 0.27 kg / 0.59 pounds
1 244 Gs
0.04 kg / 0.09 pounds
40 g / 0.4 N
0.24 kg / 0.54 pounds
~0 Gs
50 mm 0.00 kg / 0.01 pounds
164 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
104 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
70 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
49 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
36 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
27 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Safety (HSE) (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
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Remote 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

Table 8: Collisions (kinetic energy) - 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

Table 9: Surface protection spec
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)

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)

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!
1. Shear force

*Caution: On a vertical wall, the magnet retains merely ~20% of its max power.

2. Steel thickness impact

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

3. Temperature resistance

*For N38 grade, 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 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%
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

Field Strength

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This product is an exceptionally strong cylindrical magnet, made from durable NdFeB material, which, with dimensions of Ø12x10 mm, guarantees maximum efficiency. The MW 12x10 / N38 component is characterized by an accuracy of ±0.1mm and industrial build quality, making it an excellent 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 warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 47.41 N with a weight of only 8.48 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure long-term durability 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 the majority 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 (Ø12x10), 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 Ø12x10 mm, which, at a weight of 8.48 g, makes it an element with impressive magnetic energy density. 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 secures it 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 12 mm. 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 diametrically if your project requires it.

Pros and cons of Nd2Fe14B magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their magnetic field is durable, and after around 10 years it decreases only by ~1% (according to research),
  • They do not lose their magnetic properties even under close interference source,
  • By using a decorative coating of silver, the element presents an nice look,
  • They feature high magnetic induction at the operating surface, which affects their effectiveness,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
  • Possibility of custom machining as well as adapting to defined conditions,
  • Huge importance in high-tech industry – they find application in magnetic memories, brushless drives, medical devices, as well as complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in small systems

Limitations

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in force. 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 start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in creating threads and complicated shapes in magnets, we recommend using cover - magnetic mount.
  • Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these devices can be problematic in diagnostics medical in case of swallowing.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Highest magnetic holding forcewhat affects it?

Information about lifting capacity is the result of a measurement for ideal contact conditions, taking into account:
  • on a plate made of mild steel, optimally conducting the magnetic field
  • whose transverse dimension equals approx. 10 mm
  • with a surface cleaned and smooth
  • with total lack of distance (no paint)
  • for force acting at a right angle (in the magnet axis)
  • at temperature room level

Lifting capacity in real conditions – factors

In real-world applications, the actual lifting capacity depends on a number of factors, listed from crucial:
  • Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Material type – the best choice is pure iron steel. Cast iron may attract less.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
  • Thermal environment – temperature increase causes a temporary drop of force. Check the maximum operating temperature for a given model.

Lifting capacity was determined by applying a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate reduces the lifting capacity.

Safe handling of neodymium magnets
Handling guide

Use magnets with awareness. Their immense force can surprise even professionals. Be vigilant and respect their force.

Warning for heart patients

People with a heart stimulator must keep an safe separation from magnets. The magnetic field can stop the operation of the life-saving device.

Bodily injuries

Pinching hazard: The pulling power is so immense that it can cause hematomas, pinching, and broken bones. Use thick gloves.

Cards and drives

Powerful magnetic fields can erase data on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

Compass and GPS

Remember: rare earth magnets produce a field that interferes with sensitive sensors. Maintain a safe distance from your mobile, tablet, and GPS.

Warning for allergy sufferers

It is widely known that the nickel plating (standard magnet coating) is a potent allergen. If your skin reacts to metals, avoid direct skin contact and choose encased magnets.

Machining danger

Combustion risk: Neodymium dust is highly flammable. Do not process magnets in home conditions as this may cause fire.

No play value

Adult use only. Small elements can be swallowed, leading to serious injuries. Keep out of reach of kids and pets.

Maximum temperature

Avoid heat. NdFeB magnets are susceptible to temperature. If you need resistance above 80°C, look for HT versions (H, SH, UH).

Material brittleness

Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Security! Details about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98