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MW 8x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010504

GTIN/EAN: 5906301814993

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

3.77 g

Magnetization Direction

↑ axial

Load capacity

1.84 kg / 18.00 N

Magnetic Induction

574.74 mT / 5747 Gs

Coating

[NiCuNi] Nickel

1.501 with VAT / pcs + price for transport

1.220 ZŁ net + 23% VAT / pcs

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Technical details - MW 8x10 / N38 - cylindrical magnet

Specification / characteristics - MW 8x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010504
GTIN/EAN 5906301814993
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 10 mm [±0,1 mm]
Weight 3.77 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.84 kg / 18.00 N
Magnetic Induction ~ ? 574.74 mT / 5747 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x10 / 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 modeling of the magnet - technical parameters

These values represent the direct effect of a physical simulation. Values were calculated on models for the material Nd2Fe14B. Actual performance might slightly differ from theoretical values. Treat these data as a reference point for designers.

Table 1: Static force (pull vs distance) - characteristics
MW 8x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5742 Gs
574.2 mT
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
weak grip
1 mm 4323 Gs
432.3 mT
1.04 kg / 2.30 lbs
1043.0 g / 10.2 N
weak grip
2 mm 3109 Gs
310.9 mT
0.54 kg / 1.19 lbs
539.5 g / 5.3 N
weak grip
3 mm 2206 Gs
220.6 mT
0.27 kg / 0.60 lbs
271.6 g / 2.7 N
weak grip
5 mm 1149 Gs
114.9 mT
0.07 kg / 0.16 lbs
73.7 g / 0.7 N
weak grip
10 mm 323 Gs
32.3 mT
0.01 kg / 0.01 lbs
5.8 g / 0.1 N
weak grip
15 mm 131 Gs
13.1 mT
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
weak grip
20 mm 66 Gs
6.6 mT
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
weak grip
30 mm 24 Gs
2.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
50 mm 6 Gs
0.6 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip

Table 2: Slippage force (vertical surface)
MW 8x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.37 kg / 0.81 lbs
368.0 g / 3.6 N
1 mm Stal (~0.2) 0.21 kg / 0.46 lbs
208.0 g / 2.0 N
2 mm Stal (~0.2) 0.11 kg / 0.24 lbs
108.0 g / 1.1 N
3 mm Stal (~0.2) 0.05 kg / 0.12 lbs
54.0 g / 0.5 N
5 mm Stal (~0.2) 0.01 kg / 0.03 lbs
14.0 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: Vertical assembly (shearing) - vertical pull
MW 8x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.55 kg / 1.22 lbs
552.0 g / 5.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.37 kg / 0.81 lbs
368.0 g / 3.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.18 kg / 0.41 lbs
184.0 g / 1.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.92 kg / 2.03 lbs
920.0 g / 9.0 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 8x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.18 kg / 0.41 lbs
184.0 g / 1.8 N
1 mm
25%
0.46 kg / 1.01 lbs
460.0 g / 4.5 N
2 mm
50%
0.92 kg / 2.03 lbs
920.0 g / 9.0 N
3 mm
75%
1.38 kg / 3.04 lbs
1380.0 g / 13.5 N
5 mm
100%
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
10 mm
100%
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
11 mm
100%
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
12 mm
100%
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N

Table 5: Thermal resistance (stability) - resistance threshold
MW 8x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
OK
40 °C -2.2% 1.80 kg / 3.97 lbs
1799.5 g / 17.7 N
OK
60 °C -4.4% 1.76 kg / 3.88 lbs
1759.0 g / 17.3 N
OK
80 °C -6.6% 1.72 kg / 3.79 lbs
1718.6 g / 16.9 N
100 °C -28.8% 1.31 kg / 2.89 lbs
1310.1 g / 12.9 N

Table 6: Two magnets (repulsion) - field range
MW 8x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 10.22 kg / 22.52 lbs
6 064 Gs
1.53 kg / 3.38 lbs
1532 g / 15.0 N
N/A
1 mm 7.82 kg / 17.25 lbs
10 050 Gs
1.17 kg / 2.59 lbs
1174 g / 11.5 N
7.04 kg / 15.52 lbs
~0 Gs
2 mm 5.79 kg / 12.77 lbs
8 646 Gs
0.87 kg / 1.92 lbs
869 g / 8.5 N
5.21 kg / 11.49 lbs
~0 Gs
3 mm 4.19 kg / 9.25 lbs
7 358 Gs
0.63 kg / 1.39 lbs
629 g / 6.2 N
3.77 kg / 8.32 lbs
~0 Gs
5 mm 2.13 kg / 4.69 lbs
5 238 Gs
0.32 kg / 0.70 lbs
319 g / 3.1 N
1.91 kg / 4.22 lbs
~0 Gs
10 mm 0.41 kg / 0.90 lbs
2 299 Gs
0.06 kg / 0.14 lbs
61 g / 0.6 N
0.37 kg / 0.81 lbs
~0 Gs
20 mm 0.03 kg / 0.07 lbs
646 Gs
0.00 kg / 0.01 lbs
5 g / 0.0 N
0.03 kg / 0.06 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
76 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
47 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
31 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
22 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
16 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
12 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Hazards (implants) - warnings
MW 8x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 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 8x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.32 km/h
(6.20 m/s)
0.07 J
30 mm 38.59 km/h
(10.72 m/s)
0.22 J
50 mm 49.82 km/h
(13.84 m/s)
0.36 J
100 mm 70.46 km/h
(19.57 m/s)
0.72 J

Table 9: Surface protection spec
MW 8x10 / 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 8x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 040 Mx 30.4 µWb
Pc Coefficient 1.00 High (Stable)

Table 11: Hydrostatics and buoyancy
MW 8x10 / N38

Environment Effective steel pull Effect
Air (land) 1.84 kg Standard
Water (riverbed) 2.11 kg
(+0.27 kg buoyancy gain)
+14.5%
Corrosion warning: 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)

*Warning: On a vertical wall, the magnet retains only ~20% of its nominal pull.

2. Efficiency vs thickness

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

3. Heat tolerance

*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) = 1.00

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
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: 010504-2026
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Force (pull)

Magnetic Field

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This product is an incredibly powerful rod magnet, composed of modern NdFeB material, which, at dimensions of Ø8x10 mm, guarantees the highest energy density. The MW 8x10 / N38 component boasts a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 1.84 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 18.00 N with a weight of only 3.77 g, this cylindrical magnet 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 professional 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.
Magnets N38 are suitable for 90% 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 (Ø8x10), 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 Ø8x10 mm, which, at a weight of 3.77 g, makes it an element with impressive magnetic energy density. The value of 18.00 N means that the magnet is capable of holding a weight many times exceeding its own mass of 3.77 g. 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 10 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 through the diameter if your project requires it.

Advantages and disadvantages of neodymium magnets.

Pros

Apart from their notable magnetic energy, neodymium magnets have these key benefits:
  • They retain attractive force for around ten years – the drop is just ~1% (according to analyses),
  • They do not lose their magnetic properties even under external field action,
  • In other words, due to the metallic finish of nickel, the element is aesthetically pleasing,
  • They are known for high magnetic induction at the operating surface, which improves attraction properties,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
  • Possibility of precise machining and adjusting to complex requirements,
  • Versatile presence in modern industrial fields – they are used in mass storage devices, motor assemblies, precision medical tools, also modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Problematic aspects of neodymium magnets: application proposals
  • At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of creating threads in the magnet and complicated shapes - preferred is casing - mounting mechanism.
  • Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small components of these products can be problematic in diagnostics medical in case of swallowing.
  • Due to complex production process, their price exceeds standard values,

Lifting parameters

Highest magnetic holding forcewhat contributes to it?

The declared magnet strength represents the limit force, recorded under optimal environment, meaning:
  • with the application of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • characterized by even structure
  • under conditions of ideal adhesion (metal-to-metal)
  • during detachment in a direction perpendicular to the mounting surface
  • at ambient temperature room level

Lifting capacity in real conditions – factors

In real-world applications, the actual lifting capacity is determined by several key aspects, presented from crucial:
  • Air gap (between the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Angle of force application – highest force is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Steel type – mild steel attracts best. Alloy admixtures decrease magnetic permeability and holding force.
  • Surface quality – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a small distance between the magnet and the plate decreases the holding force.

Warnings
Fragile material

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Clashing of two magnets leads to them breaking into small pieces.

Crushing risk

Big blocks can crush fingers instantly. Never put your hand between two attracting surfaces.

Cards and drives

Intense magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Maximum temperature

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its properties and strength.

Handling guide

Handle magnets consciously. Their powerful strength can shock even experienced users. Be vigilant and respect their force.

Phone sensors

A powerful magnetic field disrupts the operation of magnetometers in phones and navigation systems. Do not bring magnets near a smartphone to prevent breaking the sensors.

Implant safety

Warning for patients: Powerful magnets disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.

Do not give to children

Absolutely store magnets out of reach of children. Risk of swallowing is high, and the effects of magnets clamping inside the body are life-threatening.

Dust is flammable

Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Allergy Warning

Studies show that the nickel plating (the usual finish) is a common allergen. If your skin reacts to metals, prevent touching magnets with bare hands and opt for versions in plastic housing.

Attention! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98