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Reliable solutions for fixing non-invasive. Threaded mounts (external or internal) guarantee instant organization of work on production halls. They are indispensable installing lighting, sensors and ads.

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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 - 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 - technical parameters

The following information constitute the direct effect of a physical calculation. Values are based on algorithms for the material Nd2Fe14B. Operational conditions may differ. Use these calculations as a supplementary guide when designing systems.

Table 1: Static force (force vs distance) - power drop
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 lbs
7370.0 g / 72.3 N
warning
1 mm 3944 Gs
394.4 mT
5.62 kg / 12.38 lbs
5616.2 g / 55.1 N
warning
2 mm 3362 Gs
336.2 mT
4.08 kg / 9.00 lbs
4083.1 g / 40.1 N
warning
3 mm 2820 Gs
282.0 mT
2.87 kg / 6.33 lbs
2871.9 g / 28.2 N
warning
5 mm 1931 Gs
193.1 mT
1.35 kg / 2.97 lbs
1346.9 g / 13.2 N
low risk
10 mm 763 Gs
76.3 mT
0.21 kg / 0.46 lbs
210.3 g / 2.1 N
low risk
15 mm 349 Gs
34.9 mT
0.04 kg / 0.10 lbs
44.0 g / 0.4 N
low risk
20 mm 184 Gs
18.4 mT
0.01 kg / 0.03 lbs
12.2 g / 0.1 N
low risk
30 mm 68 Gs
6.8 mT
0.00 kg / 0.00 lbs
1.7 g / 0.0 N
low risk
50 mm 17 Gs
1.7 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
low risk

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

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

Table 3: Wall mounting (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 lbs
2211.0 g / 21.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.47 kg / 3.25 lbs
1474.0 g / 14.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.74 kg / 1.62 lbs
737.0 g / 7.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.69 kg / 8.12 lbs
3685.0 g / 36.1 N

Table 4: Material efficiency (substrate influence) - power losses
MW 15x8 / N38

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

Table 5: Thermal stability (material behavior) - thermal limit
MW 15x8 / N38

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

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 15x8 / N38

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

Table 7: Hazards (implants) - precautionary measures
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
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 (cracking risk) - warning
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: Corrosion resistance
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: Construction 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: Hydrostatics and buoyancy
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%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

*Note: On a vertical surface, the magnet holds just approx. 20-30% of its max power.

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) severely reduces the holding force.

3. Thermal stability

*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.

Technical specification and ecology
Material specification
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
Magnet Unit Converter
Pulling force

Magnetic Induction

Other offers

This product is an exceptionally strong cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø15x8 mm, guarantees maximum efficiency. The MW 15x8 / N38 component boasts an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 7.37 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 72.28 N with a weight of only 10.6 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 immediate cracking of this professional component. To ensure stability in automation, anaerobic resins 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 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. 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 impressive magnetic energy density. The value of 72.28 N means that the magnet is capable of holding a weight many times exceeding its own mass of 10.6 g. The product has a [NiCuNi] coating, which protects the surface against external factors, 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. 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.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They retain full power for nearly 10 years – the drop is just ~1% (based on simulations),
  • They retain their magnetic properties even under strong external field,
  • Thanks to the shimmering finish, the plating of Ni-Cu-Ni, gold-plated, or silver gives an elegant appearance,
  • Magnetic induction on the top side of the magnet remains extremely intense,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Due to the ability of flexible shaping and customization to individualized solutions, NdFeB magnets can be modeled in a variety of shapes and sizes, which increases their versatility,
  • Fundamental importance in innovative solutions – they serve a role in HDD drives, brushless drives, diagnostic systems, as well as multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Limitations

Characteristics of disadvantages of neodymium magnets: application proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only secures 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 power (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
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited ability of making threads in the magnet and complicated forms - recommended is a housing - magnetic holder.
  • Health risk related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these magnets can complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum magnetic pulling forcewhat affects it?

The specified lifting capacity concerns the maximum value, recorded under ideal test conditions, meaning:
  • with the use of a sheet made of special test steel, ensuring full magnetic saturation
  • whose thickness reaches at least 10 mm
  • with a surface cleaned and smooth
  • without the slightest insulating layer between the magnet and steel
  • under axial application of breakaway force (90-degree angle)
  • in stable room temperature

What influences lifting capacity in practice

Bear in mind that the magnet holding will differ depending on elements below, in order of importance:
  • Air gap (between the magnet and the metal), since even a tiny clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
  • Direction of force – maximum parameter is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Chemical composition of the base – mild steel gives the best results. Alloy steels lower magnetic permeability and lifting capacity.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was determined using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, whereas under shearing force the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate decreases the holding force.

Safe handling of NdFeB magnets
Fire risk

Machining of neodymium magnets poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Do not underestimate power

Use magnets consciously. Their huge power can surprise even experienced users. Be vigilant and respect their force.

Impact on smartphones

GPS units and mobile phones are highly sensitive to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Implant safety

For implant holders: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or request help to handle the magnets.

Magnets are brittle

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Sensitization to coating

Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness occurs, immediately stop handling magnets and use protective gear.

Data carriers

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

Pinching danger

Mind your fingers. Two large magnets will join instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Swallowing risk

Adult use only. Small elements can be swallowed, causing intestinal necrosis. Store out of reach of children and animals.

Demagnetization risk

Keep cool. NdFeB magnets are sensitive to heat. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Important! More info about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98