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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 data of the product - 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 product - report

The following data represent the direct effect of a mathematical simulation. Values were calculated on models for the class Nd2Fe14B. Operational parameters may differ from theoretical values. Please consider these data as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs distance) - interaction chart
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
safe
1 mm 4323 Gs
432.3 mT
1.04 kg / 2.30 lbs
1043.0 g / 10.2 N
safe
2 mm 3109 Gs
310.9 mT
0.54 kg / 1.19 lbs
539.5 g / 5.3 N
safe
3 mm 2206 Gs
220.6 mT
0.27 kg / 0.60 lbs
271.6 g / 2.7 N
safe
5 mm 1149 Gs
114.9 mT
0.07 kg / 0.16 lbs
73.7 g / 0.7 N
safe
10 mm 323 Gs
32.3 mT
0.01 kg / 0.01 lbs
5.8 g / 0.1 N
safe
15 mm 131 Gs
13.1 mT
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
safe
20 mm 66 Gs
6.6 mT
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
safe
30 mm 24 Gs
2.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
50 mm 6 Gs
0.6 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe

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: Wall mounting (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) - power losses
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) - power drop
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 (attraction) - field range
MW 8x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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: Protective zones (electronics) - precautionary measures
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
Mobile device 40 Gs (4.0 mT) 2.5 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 (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: Coating parameters (durability)
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: Construction 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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Warning: On a vertical wall, the magnet holds merely ~20% of its perpendicular strength.

2. Plate thickness effect

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

3. Power loss vs temp

*For N38 material, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.00

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%
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
Magnet Unit Converter
Magnet pull force

Magnetic Field

See also products

The offered product is an extremely powerful cylinder magnet, manufactured from modern NdFeB material, which, with dimensions of Ø8x10 mm, guarantees maximum efficiency. The MW 8x10 / N38 model boasts an accuracy of ±0.1mm and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 1.84 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 18.00 N with a weight of only 3.77 g, this rod is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 8.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, 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 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 (Ø8x10), 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 Ø8x10 mm, which, at a weight of 3.77 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 1.84 kg (force ~18.00 N), which, with such defined 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 cylinder is magnetized axially (along the height of 10 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 as well as cons of neodymium magnets.

Pros

Apart from their superior holding force, neodymium magnets have these key benefits:
  • They have unchanged lifting capacity, and over around ten years their attraction force decreases symbolically – ~1% (in testing),
  • They do not lose their magnetic properties even under external field action,
  • The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to present itself better,
  • The surface of neodymium magnets generates a intense magnetic field – this is one of their assets,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • In view of the possibility of accurate shaping and adaptation to unique projects, NdFeB magnets can be produced in a variety of forms and dimensions, which makes them more universal,
  • Universal use in modern industrial fields – they find application in computer drives, brushless drives, advanced medical instruments, as well as other advanced devices.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Disadvantages

Disadvantages of NdFeB magnets:
  • At very strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We recommend a housing - magnetic mount, due to difficulties in producing threads inside the magnet and complicated shapes.
  • Potential hazard related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small elements of these devices are able to disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Best holding force of the magnet in ideal parameterswhat affects it?

Information about lifting capacity was defined for the most favorable conditions, assuming:
  • with the contact of a yoke made of special test steel, ensuring maximum field concentration
  • whose transverse dimension is min. 10 mm
  • with an ground contact surface
  • under conditions of gap-free contact (metal-to-metal)
  • under vertical force direction (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Key elements affecting lifting force

It is worth knowing that the working load will differ depending on elements below, in order of importance:
  • Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick sheet does not close the flux, causing part of the flux to be escaped to the other side.
  • Material composition – not every steel attracts identically. High carbon content worsen the attraction effect.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
  • Thermal environment – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate reduces the load capacity.

H&S for magnets
Operating temperature

Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. Damage is permanent.

Phone sensors

Remember: neodymium magnets generate a field that confuses sensitive sensors. Keep a safe distance from your phone, device, and GPS.

Dust is flammable

Fire warning: Neodymium dust is explosive. Do not process magnets in home conditions as this risks ignition.

Nickel allergy

Some people suffer from a sensitization to nickel, which is the standard coating for NdFeB magnets. Extended handling can result in an allergic reaction. We recommend use protective gloves.

Do not give to children

Strictly store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are fatal.

Do not underestimate power

Handle with care. Rare earth magnets act from a long distance and connect with massive power, often faster than you can move away.

Pacemakers

Warning for patients: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Beware of splinters

NdFeB magnets are sintered ceramics, which means they are very brittle. Collision of two magnets leads to them cracking into shards.

Data carriers

Do not bring magnets near a wallet, computer, or TV. The magnetism can permanently damage these devices and erase data from cards.

Hand protection

Risk of injury: The pulling power is so great that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.

Danger! Need more info? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98