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MW 15x8 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010032

GTIN/EAN: 5906301810315

5.00

Diameter Ø

15 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

10.6 g

Magnetization Direction

↑ axial

Load capacity

7.37 kg / 72.28 N

Magnetic Induction

451.96 mT / 4520 Gs

Coating

[NiCuNi] Nickel

4.92 with VAT / pcs + price for transport

4.00 ZŁ net + 23% VAT / pcs

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Technical details - MW 15x8 / N38 - cylindrical magnet

Specification / characteristics - MW 15x8 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010032
GTIN/EAN 5906301810315
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 15 mm [±0,1 mm]
Height 8 mm [±0,1 mm]
Weight 10.6 g
Magnetization Direction ↑ axial
Load capacity ~ ? 7.37 kg / 72.28 N
Magnetic Induction ~ ? 451.96 mT / 4520 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 15x8 / 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

Engineering modeling of the product - report

Presented values are the outcome of a engineering analysis. Results rely on algorithms for the material Nd2Fe14B. Real-world performance may differ from theoretical values. Please consider these calculations as a reference point for designers.

Table 1: Static pull force (pull vs gap) - interaction chart
MW 15x8 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4518 Gs
451.8 mT
7.37 kg / 16.25 pounds
7370.0 g / 72.3 N
strong
1 mm 3944 Gs
394.4 mT
5.62 kg / 12.38 pounds
5616.2 g / 55.1 N
strong
2 mm 3362 Gs
336.2 mT
4.08 kg / 9.00 pounds
4083.1 g / 40.1 N
strong
3 mm 2820 Gs
282.0 mT
2.87 kg / 6.33 pounds
2871.9 g / 28.2 N
strong
5 mm 1931 Gs
193.1 mT
1.35 kg / 2.97 pounds
1346.9 g / 13.2 N
weak grip
10 mm 763 Gs
76.3 mT
0.21 kg / 0.46 pounds
210.3 g / 2.1 N
weak grip
15 mm 349 Gs
34.9 mT
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
weak grip
20 mm 184 Gs
18.4 mT
0.01 kg / 0.03 pounds
12.2 g / 0.1 N
weak grip
30 mm 68 Gs
6.8 mT
0.00 kg / 0.00 pounds
1.7 g / 0.0 N
weak grip
50 mm 17 Gs
1.7 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
weak grip

Table 2: Shear load (wall)
MW 15x8 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.47 kg / 3.25 pounds
1474.0 g / 14.5 N
1 mm Stal (~0.2) 1.12 kg / 2.48 pounds
1124.0 g / 11.0 N
2 mm Stal (~0.2) 0.82 kg / 1.80 pounds
816.0 g / 8.0 N
3 mm Stal (~0.2) 0.57 kg / 1.27 pounds
574.0 g / 5.6 N
5 mm Stal (~0.2) 0.27 kg / 0.60 pounds
270.0 g / 2.6 N
10 mm Stal (~0.2) 0.04 kg / 0.09 pounds
42.0 g / 0.4 N
15 mm Stal (~0.2) 0.01 kg / 0.02 pounds
8.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 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: Vertical assembly (sliding) - vertical pull
MW 15x8 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.21 kg / 4.87 pounds
2211.0 g / 21.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.47 kg / 3.25 pounds
1474.0 g / 14.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.74 kg / 1.62 pounds
737.0 g / 7.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.69 kg / 8.12 pounds
3685.0 g / 36.1 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 15x8 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.74 kg / 1.62 pounds
737.0 g / 7.2 N
1 mm
25%
1.84 kg / 4.06 pounds
1842.5 g / 18.1 N
2 mm
50%
3.69 kg / 8.12 pounds
3685.0 g / 36.1 N
3 mm
75%
5.53 kg / 12.19 pounds
5527.5 g / 54.2 N
5 mm
100%
7.37 kg / 16.25 pounds
7370.0 g / 72.3 N
10 mm
100%
7.37 kg / 16.25 pounds
7370.0 g / 72.3 N
11 mm
100%
7.37 kg / 16.25 pounds
7370.0 g / 72.3 N
12 mm
100%
7.37 kg / 16.25 pounds
7370.0 g / 72.3 N

Table 5: Working in heat (material behavior) - power drop
MW 15x8 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 7.37 kg / 16.25 pounds
7370.0 g / 72.3 N
OK
40 °C -2.2% 7.21 kg / 15.89 pounds
7207.9 g / 70.7 N
OK
60 °C -4.4% 7.05 kg / 15.53 pounds
7045.7 g / 69.1 N
OK
80 °C -6.6% 6.88 kg / 15.18 pounds
6883.6 g / 67.5 N
100 °C -28.8% 5.25 kg / 11.57 pounds
5247.4 g / 51.5 N

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 15x8 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 22.23 kg / 49.02 pounds
5 606 Gs
3.34 kg / 7.35 pounds
3335 g / 32.7 N
N/A
1 mm 19.55 kg / 43.11 pounds
8 473 Gs
2.93 kg / 6.47 pounds
2933 g / 28.8 N
17.60 kg / 38.80 pounds
~0 Gs
2 mm 16.94 kg / 37.35 pounds
7 887 Gs
2.54 kg / 5.60 pounds
2541 g / 24.9 N
15.25 kg / 33.62 pounds
~0 Gs
3 mm 14.52 kg / 32.00 pounds
7 301 Gs
2.18 kg / 4.80 pounds
2178 g / 21.4 N
13.07 kg / 28.80 pounds
~0 Gs
5 mm 10.37 kg / 22.85 pounds
6 169 Gs
1.55 kg / 3.43 pounds
1555 g / 15.3 N
9.33 kg / 20.57 pounds
~0 Gs
10 mm 4.06 kg / 8.96 pounds
3 862 Gs
0.61 kg / 1.34 pounds
609 g / 6.0 N
3.66 kg / 8.06 pounds
~0 Gs
20 mm 0.63 kg / 1.40 pounds
1 526 Gs
0.10 kg / 0.21 pounds
95 g / 0.9 N
0.57 kg / 1.26 pounds
~0 Gs
50 mm 0.01 kg / 0.03 pounds
215 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
0.01 kg / 0.02 pounds
~0 Gs
60 mm 0.01 kg / 0.01 pounds
136 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
91 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
64 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
46 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
35 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Hazards (electronics) - warnings
MW 15x8 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.0 cm
Hearing aid 10 Gs (1.0 mT) 6.5 cm
Mechanical watch 20 Gs (2.0 mT) 5.0 cm
Mobile device 40 Gs (4.0 mT) 4.0 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

Table 8: Impact energy (cracking risk) - collision effects
MW 15x8 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 27.06 km/h
(7.52 m/s)
0.30 J
30 mm 46.07 km/h
(12.80 m/s)
0.87 J
50 mm 59.46 km/h
(16.52 m/s)
1.45 J
100 mm 84.09 km/h
(23.36 m/s)
2.89 J

Table 9: Surface protection spec
MW 15x8 / 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: Electrical data (Flux)
MW 15x8 / N38

Parameter Value SI Unit / Description
Magnetic Flux 8 074 Mx 80.7 µWb
Pc Coefficient 0.61 High (Stable)

Table 11: Physics of underwater searching
MW 15x8 / N38

Environment Effective steel pull Effect
Air (land) 7.37 kg Standard
Water (riverbed) 8.44 kg
(+1.07 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains just approx. 20-30% of its perpendicular strength.

2. Plate thickness effect

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

3. Temperature resistance

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.61

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.

Engineering data and GPSR
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: 010032-2026
Measurement Calculator
Force (pull)

Magnetic Induction

Check out also deals

The presented product is a very strong rod magnet, produced from advanced NdFeB material, which, at dimensions of Ø15x8 mm, guarantees optimal power. The MW 15x8 / N38 model features a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 7.37 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast 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 DIY projects, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 72.28 N with a weight of only 10.6 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need even stronger magnets in the same volume (Ø15x8), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
This model is characterized by dimensions Ø15x8 mm, which, at a weight of 10.6 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 7.37 kg (force ~72.28 N), which, with such compact dimensions, proves the high power 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 15 mm. Such an arrangement is standard 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 diametrically if your project requires it.

Advantages and disadvantages of neodymium magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:
  • They have constant strength, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • They are noted for resistance to demagnetization induced by external field influence,
  • A magnet with a shiny silver surface has better aesthetics,
  • The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
  • 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...
  • Thanks to modularity in designing and the capacity to customize to unusual requirements,
  • Huge importance in modern technologies – they serve a role in magnetic memories, motor assemblies, precision medical tools, as well as complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Disadvantages

Characteristics of disadvantages of neodymium magnets: tips and applications.
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • We recommend cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these devices can complicate diagnosis 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

Breakaway strength of the magnet in ideal conditionswhat it depends on?

The force parameter is a theoretical maximum value performed under the following configuration:
  • on a base made of mild steel, effectively closing the magnetic field
  • with a cross-section of at least 10 mm
  • characterized by even structure
  • with zero gap (no coatings)
  • during detachment in a direction vertical to the mounting surface
  • at room temperature

What influences lifting capacity in practice

Real force is influenced by working environment parameters, mainly (from most important):
  • Air gap (betwixt the magnet and the metal), because even a very small distance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Chemical composition of the base – low-carbon steel gives the best results. Alloy steels decrease magnetic permeability and holding force.
  • Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with neodymium magnets
Hand protection

Danger of trauma: The pulling power is so immense that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Product not for children

Adult use only. Small elements pose a choking risk, causing intestinal necrosis. Keep out of reach of children and animals.

Shattering risk

Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. Wear goggles.

Nickel coating and allergies

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness happens, immediately stop handling magnets and wear gloves.

Dust explosion hazard

Fire warning: Rare earth powder is highly flammable. Do not process magnets in home conditions as this risks ignition.

Immense force

Handle magnets consciously. Their immense force can shock even experienced users. Plan your moves and do not underestimate their force.

Do not overheat magnets

Avoid heat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, inquire about HT versions (H, SH, UH).

Pacemakers

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.

Data carriers

Avoid bringing magnets close to a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Precision electronics

An intense magnetic field disrupts the functioning of magnetometers in smartphones and GPS navigation. Do not bring magnets close to a device to avoid damaging the sensors.

Caution! Details about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98