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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

view parameters »

7.82 ZŁ with VAT / pcs + price for transport

6.36 ZŁ net + 23% VAT / pcs

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Technical of the product - 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 - data

The following data represent the outcome of a mathematical calculation. Values are based on algorithms for the class Nd2Fe14B. Actual performance may differ. Use these calculations as a preliminary roadmap when designing systems.

Table 1: Static force (force 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
 strong
2 mm 3615 Gs
361.5 mT
 6.64 kg / 14.63 lbs
6635.0 g / 65.1 N
 strong
3 mm 3137 Gs
313.7 mT
 5.00 kg / 11.01 lbs
4996.2 g / 49.0 N
 strong
5 mm 2305 Gs
230.5 mT
 2.70 kg / 5.95 lbs
2698.6 g / 26.5 N
 strong
10 mm 1045 Gs
104.5 mT
 0.55 kg / 1.22 lbs
555.0 g / 5.4 N
 safe
15 mm 517 Gs
51.7 mT
 0.14 kg / 0.30 lbs
135.7 g / 1.3 N
 safe
20 mm 285 Gs
28.5 mT
 0.04 kg / 0.09 lbs
41.1 g / 0.4 N
 safe
30 mm 110 Gs
11.0 mT
 0.01 kg / 0.01 lbs
6.2 g / 0.1 N
 safe
50 mm 29 Gs
2.9 mT
 0.00 kg / 0.00 lbs
0.4 g / 0.0 N
 safe
Magnetic force decreases significantly per each millimeter of spacing. Note that even a microscopic distance (e.g., contamination, paint, rust) significantly reduces the pull force. Neodymiums hold most effectively at the point of direct contact; air break weakens the power. Notice how flashily the pull force fall, when the magnet does not adhere flatly to the steel surface. When planning the mounting, eliminate unnecessary gaps.

Table 2: Shear load (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
The table below defines the estimated holding capacity sufficient to cause the slippage of the magnet downwards along a vertical steel plate (assuming standard friction coefficient). This parameter depends on the air gap between the magnet and the metal.

Table 3: Vertical assembly (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
When placing a element on a upright surface (e.g., a fridge), it will maintain just about 20%-30% of its maximum pull force. Gravity and a weak degree of grip cause that products move down easier than they pull off. Want to create a hanger? Remember that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the magnet will give way down under a noticeably lighter weight. Application of an anti-slip coating can effectively raise the stability.

Table 4: Steel thickness (substrate influence) - 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 too thin steel cannot absorb the entire magnetic field, which wastes potential of the magnet. Should you install a neodymium to a thin surface, the magnetism will pass right through and the attraction force will be weaker. To squeeze 100% of this magnet's potential, you need a suitably thick backing of metal. The saturation effect causes that on delicate walls (e.g., appliance housings), the product works worse. We suggest choosing the steel cross-section from these parameters.

Table 5: Thermal resistance (material behavior) - 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
Standard neodymium magnets change their properties strength after exceeding the maximum temperature. Watch out for overheating – heat can irreversibly damage this magnet. As the temperature rises, the neodymium's capacity momentarily drops. Do not use this product near heat sources exceeding its safe range. Too high temperature will cause destruction of magnetic properties.
*Technical advisory: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Thin magnets (low Pc) may lose charge permanently under lower heat stress compared to rod magnets. Red status in the table indicates permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - 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
Two strong neodymiums attract each other from a much further distance than a magnet and steel setup. Such a system of magnet-to-magnet creates a more powerful interaction and a larger range of action. Designing a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Exercise caution that when connecting a pair of magnets, the pinch force is massive. The levitation is a bit weaker than the connection force, but still large.
*Field value for N-N configuration drops to ~0 Gs at the midpoint between the magnets (resulting from vector opposition).
Attention: Figures apply to sliding force of dual identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - 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
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 large risk to IT equipment as well as medical implants. These neodymiums produce a flux that destroys function of sensitive medical devices. Notice: the unseen radiation passes through tissues and housings. Special caution must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: automatic timepieces, remotes, speakers, and displays. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (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
Neodymium magnets are very brittle – a collision with steel causes immediate chipping. Watch the impact speed – a magnet released freely speeds with massive force. Kinetic force can destroy the magnet or painful pinches to skin. Be sure to control the product during installation so it doesn't hit with great force against the metal. A collision at high speed ends with a crack of the magnet. Wear safety glasses when playing with powerful specimens.

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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Note the thickness of the protective layer.

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)
Flux value passing through the pole surface. Essential parameter in coil applications and motors. Pc value defines the magnet's operating point.

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%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
Water displaces steel, making heavy objects slightly lighter. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.
1. Shear force

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

2. Efficiency vs thickness

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

3. Heat tolerance

*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) = 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 specification and ecology
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%
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 an exceptionally strong cylinder magnet, produced from durable NdFeB material, which, with dimensions of Ø18x10 mm, guarantees maximum efficiency. This specific item boasts high dimensional repeatability and professional build quality, making it an excellent 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 shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 105.51 N with a weight of only 19.09 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 18.1 mm) using two-component epoxy glues. To ensure stability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger 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 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 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. 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.

Advantages and disadvantages of Nd2Fe14B magnets.

Strengths

Apart from their consistent holding force, neodymium magnets have these key benefits:
  • They retain magnetic properties for almost 10 years – the loss is just ~1% (in theory),
  • They are resistant to demagnetization induced by external field influence,
  • By using a decorative layer of nickel, the element has an elegant look,
  • Magnetic induction on the top side of the magnet remains exceptional,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • Considering the possibility of free molding and adaptation to specialized requirements, magnetic components can be created in a broad palette of shapes and sizes, which amplifies use scope,
  • Universal use in innovative solutions – they find application in computer drives, drive modules, precision medical tools, as well as technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in miniature devices

Limitations

Disadvantages of NdFeB magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Limited possibility of making threads in the magnet and complex shapes - recommended is cover - magnet mounting.
  • Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these products can complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Highest magnetic holding force – what affects it?

Holding force of 10.76 kg is a theoretical maximum value performed under specific, ideal conditions:
  • with the use of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with a surface free of scratches
  • under conditions of ideal adhesion (metal-to-metal)
  • during detachment in a direction vertical to the plane
  • in temp. approx. 20°C

Determinants of lifting force in real conditions

Real force is influenced by working environment parameters, including (from priority):
  • Air gap (between the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Material type – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
  • Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – heating the magnet results in weakening of force. It is worth remembering the thermal limit for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Warnings
Precision electronics

GPS units and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Nickel allergy

Studies show that nickel (standard magnet coating) is a common allergen. If your skin reacts to metals, avoid direct skin contact or opt for encased magnets.

Operating temperature

Do not overheat. Neodymium magnets are sensitive to heat. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Fragile material

Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Wear goggles.

Dust is flammable

Machining of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Data carriers

Device Safety: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, medical aids, mechanical watches).

Bodily injuries

Large magnets can crush fingers instantly. Never place your hand betwixt two strong magnets.

This is not a toy

Always store magnets out of reach of children. Choking hazard is high, and the effects of magnets connecting inside the body are very dangerous.

ICD Warning

Life threat: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.

Conscious usage

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

Warning! Looking for details? Check our post: Why are neodymium magnets dangerous?