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MW 18x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010401

GTIN/EAN: 5906301811107

5.00

Diameter Ø

18 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

19.09 g

Magnetization Direction

↑ axial

Load capacity

10.76 kg / 105.51 N

Magnetic Induction

460.54 mT / 4605 Gs

Coating

[NiCuNi] Nickel

7.82 with VAT / pcs + price for transport

6.36 ZŁ net + 23% VAT / pcs

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Technical - MW 18x10 / N38 - cylindrical magnet

Specification / characteristics - MW 18x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010401
GTIN/EAN 5906301811107
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 18 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 19.09 g
Magnetization Direction ↑ axial
Load capacity ~ ? 10.76 kg / 105.51 N
Magnetic Induction ~ ? 460.54 mT / 4605 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 18x10 / 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 magnet - report

The following data constitute the result of a physical simulation. Results rely on models for the material Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - characteristics
MW 18x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4604 Gs
460.4 mT
10.76 kg / 23.72 LBS
10760.0 g / 105.6 N
critical level
1 mm 4114 Gs
411.4 mT
8.59 kg / 18.94 LBS
8592.4 g / 84.3 N
medium risk
2 mm 3615 Gs
361.5 mT
6.64 kg / 14.63 LBS
6635.0 g / 65.1 N
medium risk
3 mm 3137 Gs
313.7 mT
5.00 kg / 11.01 LBS
4996.2 g / 49.0 N
medium risk
5 mm 2305 Gs
230.5 mT
2.70 kg / 5.95 LBS
2698.6 g / 26.5 N
medium risk
10 mm 1045 Gs
104.5 mT
0.55 kg / 1.22 LBS
555.0 g / 5.4 N
low risk
15 mm 517 Gs
51.7 mT
0.14 kg / 0.30 LBS
135.7 g / 1.3 N
low risk
20 mm 285 Gs
28.5 mT
0.04 kg / 0.09 LBS
41.1 g / 0.4 N
low risk
30 mm 110 Gs
11.0 mT
0.01 kg / 0.01 LBS
6.2 g / 0.1 N
low risk
50 mm 29 Gs
2.9 mT
0.00 kg / 0.00 LBS
0.4 g / 0.0 N
low risk

Table 2: Shear force (vertical surface)
MW 18x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.15 kg / 4.74 LBS
2152.0 g / 21.1 N
1 mm Stal (~0.2) 1.72 kg / 3.79 LBS
1718.0 g / 16.9 N
2 mm Stal (~0.2) 1.33 kg / 2.93 LBS
1328.0 g / 13.0 N
3 mm Stal (~0.2) 1.00 kg / 2.20 LBS
1000.0 g / 9.8 N
5 mm Stal (~0.2) 0.54 kg / 1.19 LBS
540.0 g / 5.3 N
10 mm Stal (~0.2) 0.11 kg / 0.24 LBS
110.0 g / 1.1 N
15 mm Stal (~0.2) 0.03 kg / 0.06 LBS
28.0 g / 0.3 N
20 mm Stal (~0.2) 0.01 kg / 0.02 LBS
8.0 g / 0.1 N
30 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 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) - vertical pull
MW 18x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
3.23 kg / 7.12 LBS
3228.0 g / 31.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.15 kg / 4.74 LBS
2152.0 g / 21.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.08 kg / 2.37 LBS
1076.0 g / 10.6 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
5.38 kg / 11.86 LBS
5380.0 g / 52.8 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 18x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.54 kg / 1.19 LBS
538.0 g / 5.3 N
1 mm
13%
1.35 kg / 2.97 LBS
1345.0 g / 13.2 N
2 mm
25%
2.69 kg / 5.93 LBS
2690.0 g / 26.4 N
3 mm
38%
4.04 kg / 8.90 LBS
4035.0 g / 39.6 N
5 mm
63%
6.73 kg / 14.83 LBS
6725.0 g / 66.0 N
10 mm
100%
10.76 kg / 23.72 LBS
10760.0 g / 105.6 N
11 mm
100%
10.76 kg / 23.72 LBS
10760.0 g / 105.6 N
12 mm
100%
10.76 kg / 23.72 LBS
10760.0 g / 105.6 N

Table 5: Thermal stability (stability) - resistance threshold
MW 18x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 10.76 kg / 23.72 LBS
10760.0 g / 105.6 N
OK
40 °C -2.2% 10.52 kg / 23.20 LBS
10523.3 g / 103.2 N
OK
60 °C -4.4% 10.29 kg / 22.68 LBS
10286.6 g / 100.9 N
OK
80 °C -6.6% 10.05 kg / 22.16 LBS
10049.8 g / 98.6 N
100 °C -28.8% 7.66 kg / 16.89 LBS
7661.1 g / 75.2 N

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 18x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 33.25 kg / 73.30 LBS
5 648 Gs
4.99 kg / 10.99 LBS
4987 g / 48.9 N
N/A
1 mm 29.87 kg / 65.85 LBS
8 727 Gs
4.48 kg / 9.88 LBS
4480 g / 44.0 N
26.88 kg / 59.27 LBS
~0 Gs
2 mm 26.55 kg / 58.53 LBS
8 228 Gs
3.98 kg / 8.78 LBS
3983 g / 39.1 N
23.90 kg / 52.68 LBS
~0 Gs
3 mm 23.41 kg / 51.62 LBS
7 727 Gs
3.51 kg / 7.74 LBS
3512 g / 34.5 N
21.07 kg / 46.46 LBS
~0 Gs
5 mm 17.84 kg / 39.33 LBS
6 744 Gs
2.68 kg / 5.90 LBS
2676 g / 26.3 N
16.06 kg / 35.40 LBS
~0 Gs
10 mm 8.34 kg / 18.38 LBS
4 611 Gs
1.25 kg / 2.76 LBS
1251 g / 12.3 N
7.50 kg / 16.54 LBS
~0 Gs
20 mm 1.71 kg / 3.78 LBS
2 091 Gs
0.26 kg / 0.57 LBS
257 g / 2.5 N
1.54 kg / 3.40 LBS
~0 Gs
50 mm 0.05 kg / 0.10 LBS
342 Gs
0.01 kg / 0.02 LBS
7 g / 0.1 N
0.04 kg / 0.09 LBS
~0 Gs
60 mm 0.02 kg / 0.04 LBS
221 Gs
0.00 kg / 0.01 LBS
3 g / 0.0 N
0.02 kg / 0.04 LBS
~0 Gs
70 mm 0.01 kg / 0.02 LBS
150 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
80 mm 0.00 kg / 0.01 LBS
106 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
90 mm 0.00 kg / 0.01 LBS
78 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
59 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) - precautionary measures
MW 18x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 9.5 cm
Hearing aid 10 Gs (1.0 mT) 7.5 cm
Timepiece 20 Gs (2.0 mT) 6.0 cm
Mobile device 40 Gs (4.0 mT) 4.5 cm
Car key 50 Gs (5.0 mT) 4.5 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Dynamics (kinetic energy) - collision effects
MW 18x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.70 km/h
(6.86 m/s)
0.45 J
30 mm 41.49 km/h
(11.52 m/s)
1.27 J
50 mm 53.54 km/h
(14.87 m/s)
2.11 J
100 mm 75.72 km/h
(21.03 m/s)
4.22 J

Table 9: Anti-corrosion coating durability
MW 18x10 / 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 18x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 11 828 Mx 118.3 µWb
Pc Coefficient 0.63 High (Stable)

Table 11: Submerged application
MW 18x10 / N38

Environment Effective steel pull Effect
Air (land) 10.76 kg Standard
Water (riverbed) 12.32 kg
(+1.56 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. Shear force

*Note: On a vertical surface, the magnet holds merely a fraction of its max power.

2. Steel thickness impact

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

3. Heat tolerance

*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) = 0.63

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%
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: 010401-2026
Quick Unit Converter
Force (pull)

Field Strength

Other offers

This product is an extremely powerful cylinder magnet, produced from durable NdFeB material, which, at dimensions of Ø18x10 mm, guarantees the highest energy density. The MW 18x10 / N38 component features high dimensional repeatability and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 10.76 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 105.51 N with a weight of only 19.09 g, this rod is indispensable in electronics and wherever low weight is crucial.
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 automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for the majority 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 (Ø18x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
This model is characterized by dimensions Ø18x10 mm, which, at a weight of 19.09 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 10.76 kg (force ~105.51 N), which, with such defined dimensions, proves the high grade 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 18 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.

Strengths as well as weaknesses of neodymium magnets.

Pros

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:
  • They have stable power, and over nearly ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They are noted for resistance to demagnetization induced by presence of other magnetic fields,
  • Thanks to the shiny finish, the layer of nickel, gold, or silver gives an visually attractive appearance,
  • Magnetic induction on the top side of the magnet turns out to be maximum,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Possibility of detailed machining and adapting to atypical requirements,
  • Significant place in advanced technology sectors – they serve a role in computer drives, brushless drives, medical devices, and other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in small systems

Disadvantages

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We suggest casing - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated shapes.
  • Possible danger related to microscopic parts of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Best holding force of the magnet in ideal parameterswhat contributes to it?

Holding force of 10.76 kg is a result of laboratory testing executed under specific, ideal conditions:
  • with the contact of a sheet made of low-carbon steel, ensuring full magnetic saturation
  • with a thickness minimum 10 mm
  • characterized by even structure
  • under conditions of ideal adhesion (metal-to-metal)
  • under vertical force vector (90-degree angle)
  • in stable room temperature

Magnet lifting force in use – key factors

Bear in mind that the application force will differ subject to the following factors, in order of importance:
  • Gap between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin steel does not close the flux, causing part of the power to be escaped into the air.
  • Metal type – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
  • Surface structure – the more even the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
  • Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the thermal limit for a given model.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Precautions when working with neodymium magnets
Threat to navigation

Remember: rare earth magnets generate a field that interferes with precision electronics. Maintain a separation from your phone, device, and navigation systems.

Danger to the youngest

These products are not suitable for play. Eating a few magnets may result in them connecting inside the digestive tract, which poses a direct threat to life and necessitates immediate surgery.

Health Danger

Warning for patients: Strong magnetic fields affect medical devices. Keep at least 30 cm distance or request help to work with the magnets.

Fire warning

Machining of neodymium magnets carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Immense force

Handle with care. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can react.

Operating temperature

Regular neodymium magnets (grade N) lose power when the temperature goes above 80°C. This process is irreversible.

Keep away from computers

Powerful magnetic fields can corrupt files on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

Finger safety

Mind your fingers. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Beware of splinters

Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Allergy Warning

Certain individuals suffer from a sensitization to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact may cause skin redness. It is best to use safety gloves.

Warning! More info 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