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MW 8x15 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010102

GTIN/EAN: 5906301811015

5.00

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

3.44 with VAT / pcs + price for transport

2.80 ZŁ net + 23% VAT / pcs

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Strength along with structure of a neodymium magnet can be verified on our online calculation tool.

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Technical parameters - 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

Physical analysis of the product - report

Presented information constitute the result of a physical calculation. Results were calculated on algorithms for the material Nd2Fe14B. Real-world conditions may differ. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs gap) - characteristics
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
low risk
1 mm 4511 Gs
451.1 mT
0.84 kg / 1.85 lbs
837.8 g / 8.2 N
low risk
2 mm 3262 Gs
326.2 mT
0.44 kg / 0.97 lbs
438.2 g / 4.3 N
low risk
3 mm 2332 Gs
233.2 mT
0.22 kg / 0.49 lbs
224.0 g / 2.2 N
low risk
5 mm 1238 Gs
123.8 mT
0.06 kg / 0.14 lbs
63.1 g / 0.6 N
low risk
10 mm 366 Gs
36.6 mT
0.01 kg / 0.01 lbs
5.5 g / 0.1 N
low risk
15 mm 155 Gs
15.5 mT
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
low risk
20 mm 80 Gs
8.0 mT
0.00 kg / 0.00 lbs
0.3 g / 0.0 N
low risk
30 mm 30 Gs
3.0 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk
50 mm 8 Gs
0.8 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk

Table 2: Slippage 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 (sliding) - behavior on slippery surfaces
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: Steel thickness (substrate influence) - sheet metal selection
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: Magnet-Magnet interaction (repulsion) - field range
MW 8x15 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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: Hazards (electronics) - 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
Remote 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: Collisions (cracking risk) - collision effects
MW 8x15 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 16.31 km/h
(4.53 m/s)
0.06 J
30 mm 28.18 km/h
(7.83 m/s)
0.17 J
50 mm 36.37 km/h
(10.10 m/s)
0.29 J
100 mm 51.44 km/h
(14.29 m/s)
0.58 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: Electrical data (Pc)
MW 8x15 / N38

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

Table 11: Underwater work (magnet fishing)
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%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet holds merely ~20% of its nominal pull.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.

3. Thermal stability

*For standard magnets, 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
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%
Sustainability
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
Measurement Calculator
Pulling force

Field Strength

View also products

This product is an extremely powerful cylindrical magnet, composed of advanced NdFeB material, which, with dimensions of Ø8x15 mm, guarantees optimal power. The MW 8x15 / 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. 1.47 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 14.45 N with a weight of only 5.65 g, this rod 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 immediate cracking of this professional component. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets N38 are strong enough for 90% of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest 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 store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 8 mm and height 15 mm. 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 grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 15 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is most desirable 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.

Pros and cons of rare earth magnets.

Advantages

Besides their immense pulling force, neodymium magnets offer the following advantages:
  • They do not lose power, even over nearly ten years – the reduction in power is only ~1% (according to tests),
  • They do not lose their magnetic properties even under close interference source,
  • By covering with a decorative layer of nickel, the element presents an professional look,
  • Magnets are distinguished by huge magnetic induction on the outer layer,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • In view of the option of precise forming and customization to unique requirements, neodymium magnets can be produced in a variety of forms and dimensions, which increases their versatility,
  • Significant place in high-tech industry – they find application in data components, motor assemblies, precision medical tools, also multitasking production systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • At very 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.
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Due to limitations in realizing nuts and complicated forms in magnets, we propose using casing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. Furthermore, small components of these products are able to be problematic in diagnostics medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Magnetic strength at its maximum – what affects it?

The force parameter is a theoretical maximum value performed under specific, ideal conditions:
  • on a block made of structural steel, perfectly concentrating the magnetic field
  • whose transverse dimension is min. 10 mm
  • characterized by lack of roughness
  • without the slightest clearance between the magnet and steel
  • under perpendicular force vector (90-degree angle)
  • at room temperature

Lifting capacity in practice – influencing factors

Holding efficiency impacted by specific conditions, including (from most important):
  • Distance (between the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Angle of force application – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material type – ideal substrate is pure iron steel. Stainless steels may generate lower lifting capacity.
  • Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
  • Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity was assessed by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Warnings
Nickel coating and allergies

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, cease handling magnets and use protective gear.

Thermal limits

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Precision electronics

GPS units and mobile phones are highly sensitive to magnetic fields. Close proximity with a strong magnet can permanently damage the internal compass in your phone.

Electronic devices

Very strong magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.

Pacemakers

Warning for patients: Powerful magnets affect electronics. Keep at least 30 cm distance or request help to work with the magnets.

Do not give to children

These products are not suitable for play. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates urgent medical intervention.

Magnet fragility

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets leads to them cracking into small pieces.

Flammability

Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Safe operation

Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Hand protection

Large magnets can smash fingers in a fraction of a second. Under no circumstances put your hand betwixt two attracting surfaces.

Danger! Details about hazards in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98