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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

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7.82 ZŁ with VAT / pcs + price for transport

6.36 ZŁ net + 23% VAT / pcs

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Product card - 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 assembly - data

The following information represent the result of a physical analysis. Values were calculated on models for the material Nd2Fe14B. Actual parameters might slightly differ from theoretical values. Use these calculations as a supplementary guide when designing systems.

Table 1: Static force (pull vs gap) - power drop
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
 crushing
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
Grip strength decreases drastically per each millimeter of distance. Remember that every additional insulation layer (e.g., contamination, paint, veneer) noticeably reduces the pull force. Magnets work most effectively in perfect adhesion; air break drastically cuts the power. Analyze how flashily the pull force fall, when the magnet does not touch directly to the metal substrate. When designing the arrangement, avoid unnecessary gaps.

Table 2: Sliding capacity (wall)
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
The following data presents the theoretical weight limit required to cause the downward movement of the magnet down on a vertical metal surface (assuming standard friction coefficient). This parameter is a function of the distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
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
When mounting a element on a upright plane (e.g., a board), it will maintain only about 1/5 of nominal attraction strength. Gravitational force and a weak degree of grip cause that products slide down faster than they pull off. Designing a vertical fastening? Note that the shear force is much weaker than the maximum static pull force. On a smooth steel, the element will give way down under a significantly smaller load. Application of an anti-slip layer can drastically raise the stability.

Table 4: Steel thickness (saturation) - power losses
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
A thin metal plate is unable to take in the full magnetic flux, which squanders power of the magnet. Should you mount a strong magnet to a too thin substrate, the magnetism will penetrate right through and the attraction force will be weaker. To squeeze full efficiency of this magnet's power, you require a sufficiently solid backing of metal. The material oversaturation causes that on thin elements (e.g., car bodies), the magnet shows lower pull force. We suggest choosing the steel cross-section according to the table below.

Table 5: Working in heat (stability) - thermal limit
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
Classic neodymiums irreversibly lose power after exceeding the maximum temperature. Avoid high temperatures – excessive heat can irreversibly destroy this product. As the temperature rises, the neodymium's force briefly decreases. Do not use this product close to heaters higher than its safe range. Exceeding the critical threshold will lead to destruction of magnetic properties.
*Engineering note: Thermal stability depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low Pc) risk losing magnetic properties at lower temperatures than taller cylinders. Red status in the table indicates permanent field degradation for this specific geometry.

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

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (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
Two magnetic products attract each other from a wider radius than a magnet and sheet combination. The setup of magnet-to-magnet creates a more powerful interaction and a larger range of action. Designing a powerful holder? Apply two magnets instead of one magnet and a steel. Remember that when connecting a pair of magnets, the impact force is huge. The levitation is slightly lower than the attraction, but still large.
*The magnetic induction for N-N configuration drops to ~0 Gs in the exact middle of the gap (resulting from vector opposition).
Attention: Results refer to friction force of two matching magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
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
Mechanical watch 20 Gs (2.0 mT) 6.0 cm
Mobile device 40 Gs (4.0 mT) 4.5 cm
Remote 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
Extremely neodym field is a real danger to electronic devices as well as pacemakers. These neodymiums generate a flux that destroys function of sensitive medical devices. Notice: the unseen radiation acts through matter and glass. Special caution must be exercised by people with hearing aids and insulin pumps. The risk also applies to: automatic timepieces, remotes, membranes, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - warning
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
Magnetic elements are very brittle – a violent impact against metal risks their cracking. Pay attention to connection velocity – a magnet released freely becomes dangerous. Kinetic force can destroy the magnet or dangerous crushing to fingers. Be sure to control the product during installation so it doesn't hit with great force against the metal. A collision at high speed almost guarantees destruction of the neodymium. Use safety goggles when handling with powerful specimens.

Table 9: Coating parameters (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)
The following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Flux)
MW 18x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 11 828 Mx 118.3 µWb
Pc Coefficient 0.63 High (Stable)
Flux value emitted by the pole surface. Essential parameter when building generators and motors. Pc value determines the working geometry.

Table 11: Hydrostatics and buoyancy
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%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.
1. Wall mount (shear)

*Caution: On a vertical wall, the magnet retains only ~20% of its max power.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.

3. Thermal stability

*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

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: 010401-2026
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This product is a very strong cylinder magnet, made from durable NdFeB material, which, at dimensions of Ø18x10 mm, guarantees the highest energy density. The MW 18x10 / N38 component boasts an accuracy of ±0.1mm and professional 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 available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating secures 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 maximum induction on a small surface counts. Thanks to the high power of 105.51 N with a weight of only 19.09 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, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade 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 in continuous sale in our warehouse.
This model is characterized by dimensions Ø18x10 mm, which, at a weight of 19.09 g, makes it an element with impressive magnetic energy density. The value of 105.51 N means that the magnet is capable of holding a weight many times exceeding its own mass of 19.09 g. The product has a [NiCuNi] coating, which secures it against external factors, 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. 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 diametrically if your project requires it.

Pros as well as cons of neodymium magnets.

Advantages

Besides their exceptional field intensity, neodymium magnets offer the following advantages:
  • Their strength is maintained, and after approximately ten years it drops only by ~1% (theoretically),
  • They possess excellent resistance to magnetic field loss when exposed to opposing magnetic fields,
  • The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • The surface of neodymium magnets generates a powerful magnetic field – this is a distinguishing feature,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
  • Thanks to freedom in shaping and the ability to customize to unusual requirements,
  • Huge importance in high-tech industry – they find application in data components, brushless drives, diagnostic systems, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in compact constructions

Disadvantages

Problematic aspects of neodymium magnets and ways of using them
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (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 advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in realizing threads and complicated shapes in magnets, we recommend using casing - magnetic mechanism.
  • Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small components of these products are able to complicate diagnosis medical after entering the body.
  • Due to expensive raw materials, their price is higher than average,

Pull force analysis

Maximum lifting capacity of the magnet – what contributes to it?

The lifting capacity listed is a measurement result performed under specific, ideal conditions:
  • on a base made of mild steel, optimally conducting the magnetic field
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • with a plane free of scratches
  • under conditions of gap-free contact (surface-to-surface)
  • under axial force vector (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in practice – influencing factors

Please note that the working load may be lower influenced by elements below, in order of importance:
  • Distance (betwixt the magnet and the plate), since even a tiny clearance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
  • Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Base massiveness – insufficiently thick sheet does not close the flux, causing part of the power to be escaped to the other side.
  • Metal type – different alloys attracts identically. Alloy additives weaken the attraction effect.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
  • Temperature – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate lowers the load capacity.

Precautions when working with NdFeB magnets
Bone fractures

Danger of trauma: The pulling power is so immense that it can result in blood blisters, pinching, and broken bones. Use thick gloves.

Protect data

Avoid bringing magnets near a wallet, laptop, or TV. The magnetism can destroy these devices and erase data from cards.

Material brittleness

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them cracking into small pieces.

Operating temperature

Watch the temperature. Heating the magnet to high heat will ruin its properties and strength.

Health Danger

Medical warning: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Adults only

Adult use only. Small elements pose a choking risk, causing intestinal necrosis. Keep away from kids and pets.

GPS Danger

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

Handling rules

Be careful. Neodymium magnets attract from a long distance and snap with huge force, often faster than you can move away.

Skin irritation risks

A percentage of the population experience a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Prolonged contact may cause dermatitis. It is best to use safety gloves.

Dust explosion hazard

Drilling and cutting of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Important! Learn more about hazards in the article: Magnet Safety Guide.