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MW 10x20 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010007

GTIN/EAN: 5906301810063

5.00

Diameter Ø

10 mm [±0,1 mm]

Height

20 mm [±0,1 mm]

Weight

11.78 g

Magnetization Direction

↑ axial

Load capacity

2.23 kg / 21.88 N

Magnetic Induction

600.73 mT / 6007 Gs

Coating

[NiCuNi] Nickel

4.92 with VAT / pcs + price for transport

4.00 ZŁ net + 23% VAT / pcs

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Technical details - MW 10x20 / N38 - cylindrical magnet

Specification / characteristics - MW 10x20 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010007
GTIN/EAN 5906301810063
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 10 mm [±0,1 mm]
Height 20 mm [±0,1 mm]
Weight 11.78 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.23 kg / 21.88 N
Magnetic Induction ~ ? 600.73 mT / 6007 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 10x20 / 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

Engineering analysis of the product - report

These information constitute the outcome of a engineering simulation. Values are based on models for the material Nd2Fe14B. Real-world conditions might slightly differ from theoretical values. Please consider these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs gap) - power drop
MW 10x20 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 6003 Gs
600.3 mT
2.23 kg / 4.92 LBS
2230.0 g / 21.9 N
medium risk
1 mm 4815 Gs
481.5 mT
1.44 kg / 3.16 LBS
1435.1 g / 14.1 N
safe
2 mm 3743 Gs
374.3 mT
0.87 kg / 1.91 LBS
867.2 g / 8.5 N
safe
3 mm 2869 Gs
286.9 mT
0.51 kg / 1.12 LBS
509.3 g / 5.0 N
safe
5 mm 1696 Gs
169.6 mT
0.18 kg / 0.39 LBS
177.9 g / 1.7 N
safe
10 mm 570 Gs
57.0 mT
0.02 kg / 0.04 LBS
20.1 g / 0.2 N
safe
15 mm 256 Gs
25.6 mT
0.00 kg / 0.01 LBS
4.1 g / 0.0 N
safe
20 mm 137 Gs
13.7 mT
0.00 kg / 0.00 LBS
1.2 g / 0.0 N
safe
30 mm 54 Gs
5.4 mT
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
safe
50 mm 15 Gs
1.5 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe

Table 2: Sliding capacity (vertical surface)
MW 10x20 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.45 kg / 0.98 LBS
446.0 g / 4.4 N
1 mm Stal (~0.2) 0.29 kg / 0.63 LBS
288.0 g / 2.8 N
2 mm Stal (~0.2) 0.17 kg / 0.38 LBS
174.0 g / 1.7 N
3 mm Stal (~0.2) 0.10 kg / 0.22 LBS
102.0 g / 1.0 N
5 mm Stal (~0.2) 0.04 kg / 0.08 LBS
36.0 g / 0.4 N
10 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 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 (sliding) - vertical pull
MW 10x20 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.67 kg / 1.47 LBS
669.0 g / 6.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.45 kg / 0.98 LBS
446.0 g / 4.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.22 kg / 0.49 LBS
223.0 g / 2.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.12 kg / 2.46 LBS
1115.0 g / 10.9 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 10x20 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.22 kg / 0.49 LBS
223.0 g / 2.2 N
1 mm
25%
0.56 kg / 1.23 LBS
557.5 g / 5.5 N
2 mm
50%
1.12 kg / 2.46 LBS
1115.0 g / 10.9 N
3 mm
75%
1.67 kg / 3.69 LBS
1672.5 g / 16.4 N
5 mm
100%
2.23 kg / 4.92 LBS
2230.0 g / 21.9 N
10 mm
100%
2.23 kg / 4.92 LBS
2230.0 g / 21.9 N
11 mm
100%
2.23 kg / 4.92 LBS
2230.0 g / 21.9 N
12 mm
100%
2.23 kg / 4.92 LBS
2230.0 g / 21.9 N

Table 5: Working in heat (material behavior) - power drop
MW 10x20 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.23 kg / 4.92 LBS
2230.0 g / 21.9 N
OK
40 °C -2.2% 2.18 kg / 4.81 LBS
2180.9 g / 21.4 N
OK
60 °C -4.4% 2.13 kg / 4.70 LBS
2131.9 g / 20.9 N
OK
80 °C -6.6% 2.08 kg / 4.59 LBS
2082.8 g / 20.4 N
100 °C -28.8% 1.59 kg / 3.50 LBS
1587.8 g / 15.6 N

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 10x20 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 17.45 kg / 38.46 LBS
6 140 Gs
2.62 kg / 5.77 LBS
2617 g / 25.7 N
N/A
1 mm 14.15 kg / 31.20 LBS
10 813 Gs
2.12 kg / 4.68 LBS
2123 g / 20.8 N
12.74 kg / 28.08 LBS
~0 Gs
2 mm 11.23 kg / 24.75 LBS
9 631 Gs
1.68 kg / 3.71 LBS
1684 g / 16.5 N
10.11 kg / 22.28 LBS
~0 Gs
3 mm 8.78 kg / 19.35 LBS
8 515 Gs
1.32 kg / 2.90 LBS
1316 g / 12.9 N
7.90 kg / 17.41 LBS
~0 Gs
5 mm 5.21 kg / 11.48 LBS
6 559 Gs
0.78 kg / 1.72 LBS
781 g / 7.7 N
4.69 kg / 10.33 LBS
~0 Gs
10 mm 1.39 kg / 3.07 LBS
3 391 Gs
0.21 kg / 0.46 LBS
209 g / 2.0 N
1.25 kg / 2.76 LBS
~0 Gs
20 mm 0.16 kg / 0.35 LBS
1 140 Gs
0.02 kg / 0.05 LBS
24 g / 0.2 N
0.14 kg / 0.31 LBS
~0 Gs
50 mm 0.00 kg / 0.01 LBS
165 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
107 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
74 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
53 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
39 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
30 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Safety (HSE) (electronics) - precautionary measures
MW 10x20 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.0 cm
Hearing aid 10 Gs (1.0 mT) 6.0 cm
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Remote 50 Gs (5.0 mT) 3.5 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Impact energy (cracking risk) - collision effects
MW 10x20 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 13.95 km/h
(3.88 m/s)
0.09 J
30 mm 24.03 km/h
(6.68 m/s)
0.26 J
50 mm 31.03 km/h
(8.62 m/s)
0.44 J
100 mm 43.88 km/h
(12.19 m/s)
0.88 J

Table 9: Surface protection spec
MW 10x20 / 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 10x20 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 223 Mx 52.2 µWb
Pc Coefficient 1.21 High (Stable)

Table 11: Physics of underwater searching
MW 10x20 / N38

Environment Effective steel pull Effect
Air (land) 2.23 kg Standard
Water (riverbed) 2.55 kg
(+0.32 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Note: On a vertical wall, the magnet holds merely ~20% of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) drastically reduces 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) = 1.21

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.

Technical specification and ecology
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: 010007-2026
Measurement Calculator
Force (pull)

Magnetic Field

Check out more products

The offered product is a very strong cylinder magnet, manufactured from advanced NdFeB material, which, with dimensions of Ø10x20 mm, guarantees optimal power. The MW 10x20 / N38 component features an accuracy of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 2.23 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring 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 21.88 N with a weight of only 11.78 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 10.1 mm) using epoxy glues. To ensure long-term durability 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 professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø10x20), 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 Ø10x20 mm, which, at a weight of 11.78 g, makes it an element with impressive magnetic energy density. The value of 21.88 N means that the magnet is capable of holding a weight many times exceeding its own mass of 11.78 g. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 20 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 as well as disadvantages of neodymium magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They do not lose power, even after nearly 10 years – the drop in strength is only ~1% (theoretically),
  • Magnets very well defend themselves against demagnetization caused by foreign field sources,
  • A magnet with a shiny nickel surface looks better,
  • Magnets have excellent magnetic induction on the outer side,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of custom modeling as well as modifying to complex requirements,
  • Significant place in future technologies – they are used in hard drives, motor assemblies, precision medical tools, also multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Disadvantages

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • At very 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.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We suggest a housing - magnetic mount, due to difficulties in producing threads inside the magnet and complicated forms.
  • Possible danger to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these magnets can complicate diagnosis medical when they are in the body.
  • Due to neodymium price, their price is higher than average,

Lifting parameters

Breakaway strength of the magnet in ideal conditionswhat it depends on?

Magnet power is the result of a measurement for optimal configuration, including:
  • using a base made of mild steel, serving as a ideal flux conductor
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with a surface perfectly flat
  • without any insulating layer between the magnet and steel
  • for force acting at a right angle (in the magnet axis)
  • in neutral thermal conditions

What influences lifting capacity in practice

Please note that the working load may be lower influenced by elements below, in order of importance:
  • Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be escaped to the other side.
  • Chemical composition of the base – low-carbon steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
  • Smoothness – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet and the plate decreases the load capacity.

Warnings
Eye protection

Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Electronic devices

Avoid bringing magnets near a purse, computer, or screen. The magnetic field can destroy these devices and erase data from cards.

Maximum temperature

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

Swallowing risk

Product intended for adults. Small elements can be swallowed, leading to severe trauma. Keep away from children and animals.

Do not drill into magnets

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

Safe operation

Be careful. Rare earth magnets attract from a distance and snap with huge force, often quicker than you can move away.

Metal Allergy

It is widely known that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, avoid touching magnets with bare hands and choose coated magnets.

Keep away from electronics

GPS units and mobile phones are highly susceptible to magnetic fields. Close proximity with a strong magnet can permanently damage the sensors in your phone.

Medical implants

Life threat: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.

Bodily injuries

Pinching hazard: The attraction force is so immense that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.

Security! 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