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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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Technical details - 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 assembly - report

These information represent the result of a physical calculation. Results were calculated on models for the material Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these data as a reference point for designers.

Table 1: Static pull force (force vs distance) - interaction chart
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 hold (vertical surface)
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: Material efficiency (saturation) - 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: Thermal stability (stability) - power drop
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 (attraction) - 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: Hazards (electronics) - precautionary measures
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
Mechanical watch 20 Gs (2.0 mT) 4.0 cm
Mobile device 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: Construction 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%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

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

2. Plate thickness effect

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

3. Thermal stability

*For N38 grade, the critical limit 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.

Engineering data and GPSR
Chemical composition
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%
Environmental data
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
Force (pull)

Magnetic Induction

Other products

The offered product is a very strong rod magnet, composed of durable NdFeB material, which, with dimensions of Ø8x15 mm, guarantees maximum efficiency. The MW 8x15 / N38 component is characterized by 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. 1.47 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power 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, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. 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 defined dimensions, proves the high power 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. 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 neodymium magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They retain attractive force for almost 10 years – the drop is just ~1% (in theory),
  • They are noted for resistance to demagnetization induced by external field influence,
  • The use of an refined coating of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Neodymium magnets deliver maximum magnetic induction on a small surface, which ensures high operational effectiveness,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Thanks to the ability of flexible shaping and customization to unique solutions, magnetic components can be created in a variety of forms and dimensions, which amplifies use scope,
  • Fundamental importance in innovative solutions – they are commonly used in mass storage devices, electromotive mechanisms, medical equipment, and modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Problematic aspects of neodymium magnets: application proposals
  • At strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 extremely resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of creating threads in the magnet and complicated shapes - preferred is cover - magnetic holder.
  • Potential hazard to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these products can be problematic in diagnostics medical when they are in the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum lifting force for a neodymium magnet – what contributes to it?

Breakaway force is the result of a measurement for optimal configuration, taking into account:
  • with the contact of a sheet made of special test steel, guaranteeing maximum field concentration
  • with a thickness of at least 10 mm
  • with a plane free of scratches
  • under conditions of ideal adhesion (metal-to-metal)
  • for force acting at a right angle (pull-off, not shear)
  • at room temperature

Magnet lifting force in use – key factors

Effective lifting capacity is influenced by working environment parameters, mainly (from priority):
  • Air gap (between 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, corrosion or dirt).
  • Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of nominal force).
  • Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be lost into the air.
  • Steel grade – the best choice is pure iron steel. Hardened steels may attract less.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, however under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate decreases the holding force.

Precautions when working with NdFeB magnets
Avoid contact if allergic

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If skin irritation happens, cease handling magnets and use protective gear.

Eye protection

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Mechanical processing

Machining of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Threat to navigation

GPS units and smartphones are extremely susceptible to magnetism. Close proximity with a strong magnet can ruin the internal compass in your phone.

Bodily injuries

Big blocks can smash fingers instantly. Do not place your hand between two strong magnets.

Caution required

Handle with care. Neodymium magnets attract from a distance and snap with massive power, often faster than you can move away.

Operating temperature

Avoid heat. Neodymium magnets are sensitive to heat. If you require resistance above 80°C, look for HT versions (H, SH, UH).

Life threat

For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or ask another person to work with the magnets.

Choking Hazard

Only for adults. Small elements can be swallowed, causing serious injuries. Store out of reach of kids and pets.

Cards and drives

Equipment safety: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, medical aids, mechanical watches).

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