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MW 8x15 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010102

GTIN/EAN: 5906301811015

5.00
Load capacity 1.47 kg / 14.45 N Magnetic Induction 598.12 mT / 5981 Gs
Diameter Ø
8 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
5.65 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

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2.80 zł net + 23% VAT / pcs

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Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Parameters along with shape of a neodymium magnet can be reviewed using our force calculator.

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Product card - MW 8x15 / N38 - cylindrical magnet

Specification / characteristics - MW 8x15 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010102
GTIN/EAN 5906301811015
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 8 mm [±0,1 mm]
Height 15 mm [±0,1 mm]
Weight 5.65 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.47 kg / 14.45 N
Magnetic Induction ~ ? 598.12 mT / 5981 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x15 / 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 simulation of the magnet - technical parameters

Presented information are the direct effect of a physical analysis. Values rely on algorithms for the material Nd2Fe14B. Real-world conditions may deviate from the simulation results. Treat these calculations as a reference point for designers.

Table 1: Static force (pull vs distance) - power drop
MW 8x15 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5975 Gs
597.5 mT
1.47 kg / 3.24 LBS
1470.0 g / 14.4 N
weak grip
1 mm 4511 Gs
451.1 mT
0.84 kg / 1.85 LBS
837.8 g / 8.2 N
weak grip
2 mm 3262 Gs
326.2 mT
0.44 kg / 0.97 LBS
438.2 g / 4.3 N
weak grip
3 mm 2332 Gs
233.2 mT
0.22 kg / 0.49 LBS
224.0 g / 2.2 N
weak grip
5 mm 1238 Gs
123.8 mT
0.06 kg / 0.14 LBS
63.1 g / 0.6 N
weak grip
10 mm 366 Gs
36.6 mT
0.01 kg / 0.01 LBS
5.5 g / 0.1 N
weak grip
15 mm 155 Gs
15.5 mT
0.00 kg / 0.00 LBS
1.0 g / 0.0 N
weak grip
20 mm 80 Gs
8.0 mT
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
weak grip
30 mm 30 Gs
3.0 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip
50 mm 8 Gs
0.8 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip

Table 2: Sliding load (wall)
MW 8x15 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.29 kg / 0.65 LBS
294.0 g / 2.9 N
1 mm Stal (~0.2) 0.17 kg / 0.37 LBS
168.0 g / 1.6 N
2 mm Stal (~0.2) 0.09 kg / 0.19 LBS
88.0 g / 0.9 N
3 mm Stal (~0.2) 0.04 kg / 0.10 LBS
44.0 g / 0.4 N
5 mm Stal (~0.2) 0.01 kg / 0.03 LBS
12.0 g / 0.1 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 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

Table 3: Wall mounting (shearing) - vertical pull
MW 8x15 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.44 kg / 0.97 LBS
441.0 g / 4.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.29 kg / 0.65 LBS
294.0 g / 2.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.15 kg / 0.32 LBS
147.0 g / 1.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.74 kg / 1.62 LBS
735.0 g / 7.2 N

Table 4: Material efficiency (substrate influence) - power losses
MW 8x15 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.15 kg / 0.32 LBS
147.0 g / 1.4 N
1 mm
25%
0.37 kg / 0.81 LBS
367.5 g / 3.6 N
2 mm
50%
0.74 kg / 1.62 LBS
735.0 g / 7.2 N
3 mm
75%
1.10 kg / 2.43 LBS
1102.5 g / 10.8 N
5 mm
100%
1.47 kg / 3.24 LBS
1470.0 g / 14.4 N
10 mm
100%
1.47 kg / 3.24 LBS
1470.0 g / 14.4 N
11 mm
100%
1.47 kg / 3.24 LBS
1470.0 g / 14.4 N
12 mm
100%
1.47 kg / 3.24 LBS
1470.0 g / 14.4 N

Table 5: Working in heat (material behavior) - resistance threshold
MW 8x15 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.47 kg / 3.24 LBS
1470.0 g / 14.4 N
OK
40 °C -2.2% 1.44 kg / 3.17 LBS
1437.7 g / 14.1 N
OK
60 °C -4.4% 1.41 kg / 3.10 LBS
1405.3 g / 13.8 N
OK
80 °C -6.6% 1.37 kg / 3.03 LBS
1373.0 g / 13.5 N
100 °C -28.8% 1.05 kg / 2.31 LBS
1046.6 g / 10.3 N

Table 6: Two magnets (repulsion) - forces in the system
MW 8x15 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 11.06 kg / 24.39 LBS
6 130 Gs
1.66 kg / 3.66 LBS
1660 g / 16.3 N
N/A
1 mm 8.49 kg / 18.72 LBS
10 469 Gs
1.27 kg / 2.81 LBS
1274 g / 12.5 N
7.64 kg / 16.85 LBS
~0 Gs
2 mm 6.31 kg / 13.90 LBS
9 022 Gs
0.95 kg / 2.09 LBS
946 g / 9.3 N
5.68 kg / 12.51 LBS
~0 Gs
3 mm 4.59 kg / 10.12 LBS
7 697 Gs
0.69 kg / 1.52 LBS
688 g / 6.8 N
4.13 kg / 9.11 LBS
~0 Gs
5 mm 2.36 kg / 5.20 LBS
5 516 Gs
0.35 kg / 0.78 LBS
354 g / 3.5 N
2.12 kg / 4.68 LBS
~0 Gs
10 mm 0.48 kg / 1.05 LBS
2 476 Gs
0.07 kg / 0.16 LBS
71 g / 0.7 N
0.43 kg / 0.94 LBS
~0 Gs
20 mm 0.04 kg / 0.09 LBS
731 Gs
0.01 kg / 0.01 LBS
6 g / 0.1 N
0.04 kg / 0.08 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
94 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
60 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
41 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
29 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
21 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
16 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Protective zones (implants) - warnings
MW 8x15 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Timepiece 20 Gs (2.0 mT) 4.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.0 cm
Car key 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (kinetic energy) - warning
MW 8x15 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 10.47 km/h
(2.91 m/s)
0.02 J
30 mm 10.51 km/h
(2.92 m/s)
0.02 J
50 mm 10.51 km/h
(2.92 m/s)
0.02 J
100 mm 10.51 km/h
(2.92 m/s)
0.02 J

Table 9: Surface protection spec
MW 8x15 / 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 8x15 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 306 Mx 33.1 µWb
Pc Coefficient 1.19 High (Stable)

Table 11: Hydrostatics and buoyancy
MW 8x15 / N38

Environment Effective steel pull Effect
Air (land) 1.47 kg Standard
Water (riverbed) 1.68 kg
(+0.21 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

1. Shear force

*Caution: On a vertical surface, the magnet retains merely a fraction of its perpendicular strength.

2. Efficiency vs thickness

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

3. Heat tolerance

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.19

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 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

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: 010102-2026
Magnet Unit Converter

Magnet pull force


Magnetic Induction

Other deals

This product is an extremely powerful cylindrical magnet, composed of durable NdFeB material, which, at dimensions of Ø8x15 mm, guarantees maximum efficiency. This specific item is characterized by high dimensional repeatability and professional build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 1.47 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 14.45 N with a weight of only 5.65 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are strong enough 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 (Ø8x15), 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 Ø8x15 mm, which, at a weight of 5.65 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 1.47 kg (force ~14.45 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 8 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.

Advantages as well as disadvantages of neodymium magnets.

Strengths

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:
  • They have constant strength, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
  • They are extremely resistant to demagnetization induced by external field influence,
  • A magnet with a smooth silver surface has an effective appearance,
  • Magnetic induction on the surface of the magnet turns out to be impressive,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to versatility in designing and the ability to customize to complex applications,
  • Universal use in modern industrial fields – they find application in hard drives, brushless drives, diagnostic systems, also technologically advanced constructions.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Limitations

Disadvantages of neodymium magnets:
  • At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend 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 resistant to moisture, when using outdoors
  • We suggest a housing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex forms.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the context of child safety. Additionally, tiny parts of these products are able to disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum lifting capacity of the magnetwhat it depends on?

Holding force of 1.47 kg is a measurement result executed under standard conditions:
  • using a plate made of mild steel, serving as a magnetic yoke
  • with a thickness no less than 10 mm
  • characterized by even structure
  • under conditions of gap-free contact (surface-to-surface)
  • for force acting at a right angle (in the magnet axis)
  • at ambient temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

In real-world applications, the actual holding force depends on many variables, ranked from crucial:
  • Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Steel type – mild steel attracts best. Higher carbon content lower magnetic properties and lifting capacity.
  • Base smoothness – the more even the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Warnings
This is not a toy

Strictly store magnets away from children. Risk of swallowing is significant, and the effects of magnets clamping inside the body are very dangerous.

Magnetic media

Very strong magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Stay away of at least 10 cm.

Dust explosion hazard

Dust generated during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Nickel coating and allergies

Medical facts indicate that nickel (standard magnet coating) is a common allergen. If your skin reacts to metals, refrain from touching magnets with bare hands and choose coated magnets.

Crushing risk

Pinching hazard: The attraction force is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

ICD Warning

Life threat: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Demagnetization risk

Do not overheat. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, look for HT versions (H, SH, UH).

Powerful field

Handle with care. Rare earth magnets attract from a long distance and connect with huge force, often faster than you can move away.

Keep away from electronics

Navigation devices and mobile phones are highly susceptible to magnetism. Close proximity with a strong magnet can decalibrate the internal compass in your phone.

Material brittleness

Neodymium magnets are ceramic materials, which means they are very brittle. Collision of two magnets leads to them breaking into small pieces.

Danger! Want to know more? Read our article: Why are neodymium magnets dangerous?