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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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Product card - 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

Technical analysis of the product - technical parameters

Presented data constitute the result of a engineering analysis. Values rely on algorithms for the material Nd2Fe14B. Actual parameters might slightly deviate from the simulation results. Please consider these data as a supplementary guide for designers.

Table 1: Static force (pull vs gap) - characteristics
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 pounds
2230.0 g / 21.9 N
warning
1 mm 4815 Gs
481.5 mT
1.44 kg / 3.16 pounds
1435.1 g / 14.1 N
low risk
2 mm 3743 Gs
374.3 mT
0.87 kg / 1.91 pounds
867.2 g / 8.5 N
low risk
3 mm 2869 Gs
286.9 mT
0.51 kg / 1.12 pounds
509.3 g / 5.0 N
low risk
5 mm 1696 Gs
169.6 mT
0.18 kg / 0.39 pounds
177.9 g / 1.7 N
low risk
10 mm 570 Gs
57.0 mT
0.02 kg / 0.04 pounds
20.1 g / 0.2 N
low risk
15 mm 256 Gs
25.6 mT
0.00 kg / 0.01 pounds
4.1 g / 0.0 N
low risk
20 mm 137 Gs
13.7 mT
0.00 kg / 0.00 pounds
1.2 g / 0.0 N
low risk
30 mm 54 Gs
5.4 mT
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
low risk
50 mm 15 Gs
1.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk

Table 2: Shear load (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 pounds
446.0 g / 4.4 N
1 mm Stal (~0.2) 0.29 kg / 0.63 pounds
288.0 g / 2.8 N
2 mm Stal (~0.2) 0.17 kg / 0.38 pounds
174.0 g / 1.7 N
3 mm Stal (~0.2) 0.10 kg / 0.22 pounds
102.0 g / 1.0 N
5 mm Stal (~0.2) 0.04 kg / 0.08 pounds
36.0 g / 0.4 N
10 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - 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 pounds
669.0 g / 6.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.45 kg / 0.98 pounds
446.0 g / 4.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.22 kg / 0.49 pounds
223.0 g / 2.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.12 kg / 2.46 pounds
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 pounds
223.0 g / 2.2 N
1 mm
25%
0.56 kg / 1.23 pounds
557.5 g / 5.5 N
2 mm
50%
1.12 kg / 2.46 pounds
1115.0 g / 10.9 N
3 mm
75%
1.67 kg / 3.69 pounds
1672.5 g / 16.4 N
5 mm
100%
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
10 mm
100%
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
11 mm
100%
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
12 mm
100%
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N

Table 5: Thermal stability (material behavior) - resistance threshold
MW 10x20 / N38

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

Table 6: Two magnets (repulsion) - field collision
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 pounds
6 140 Gs
2.62 kg / 5.77 pounds
2617 g / 25.7 N
N/A
1 mm 14.15 kg / 31.20 pounds
10 813 Gs
2.12 kg / 4.68 pounds
2123 g / 20.8 N
12.74 kg / 28.08 pounds
~0 Gs
2 mm 11.23 kg / 24.75 pounds
9 631 Gs
1.68 kg / 3.71 pounds
1684 g / 16.5 N
10.11 kg / 22.28 pounds
~0 Gs
3 mm 8.78 kg / 19.35 pounds
8 515 Gs
1.32 kg / 2.90 pounds
1316 g / 12.9 N
7.90 kg / 17.41 pounds
~0 Gs
5 mm 5.21 kg / 11.48 pounds
6 559 Gs
0.78 kg / 1.72 pounds
781 g / 7.7 N
4.69 kg / 10.33 pounds
~0 Gs
10 mm 1.39 kg / 3.07 pounds
3 391 Gs
0.21 kg / 0.46 pounds
209 g / 2.0 N
1.25 kg / 2.76 pounds
~0 Gs
20 mm 0.16 kg / 0.35 pounds
1 140 Gs
0.02 kg / 0.05 pounds
24 g / 0.2 N
0.14 kg / 0.31 pounds
~0 Gs
50 mm 0.00 kg / 0.01 pounds
165 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
107 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
74 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
53 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
39 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
30 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (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
Timepiece 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Car key 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 (kinetic energy) - 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: Corrosion resistance
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 (Flux)
MW 10x20 / N38

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

Table 11: Hydrostatics and buoyancy
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%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Vertical hold

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

2. Steel saturation

*Thin steel (e.g. computer case) severely limits the holding force.

3. Heat tolerance

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.21

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: 010007-2026
Measurement Calculator
Magnet pull force

Magnetic Induction

Other offers

This product is an exceptionally strong cylindrical magnet, made from advanced NdFeB material, which, with dimensions of Ø10x20 mm, guarantees maximum efficiency. The MW 10x20 / N38 component features a tolerance of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 2.23 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 21.88 N with a weight of only 11.78 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 industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets N38 are strong enough for the majority of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest 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.
The presented product is a neodymium magnet with precisely defined parameters: diameter 10 mm and height 20 mm. 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 secures it 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. Such an arrangement is most desirable 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.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Pros

Apart from their notable power, neodymium magnets have these key benefits:
  • They retain attractive force for around 10 years – the loss is just ~1% (based on simulations),
  • Neodymium magnets are distinguished by highly resistant to demagnetization caused by magnetic disturbances,
  • Thanks to the reflective finish, the layer of nickel, gold-plated, or silver gives an clean appearance,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Thanks to the possibility of free forming and adaptation to individualized solutions, magnetic components can be modeled in a variety of shapes and sizes, which amplifies use scope,
  • Fundamental importance in advanced technology sectors – they are utilized in mass storage devices, electromotive mechanisms, medical devices, also complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in compact constructions

Weaknesses

Disadvantages of neodymium magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • 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
  • They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited ability of creating nuts in the magnet and complicated forms - preferred is casing - magnet mounting.
  • Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small elements of these magnets are able to complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Detachment force of the magnet in optimal conditionswhat contributes to it?

The specified lifting capacity represents the maximum value, recorded under laboratory conditions, namely:
  • on a base made of mild steel, perfectly concentrating the magnetic field
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with a plane cleaned and smooth
  • without the slightest air gap between the magnet and steel
  • during pulling in a direction perpendicular to the plane
  • at temperature room level

What influences lifting capacity in practice

Effective lifting capacity is influenced by working environment parameters, including (from priority):
  • Distance – the presence of any layer (rust, dirt, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Angle of force application – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin steel causes magnetic saturation, causing part of the flux to be wasted to the other side.
  • Metal type – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Base smoothness – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was determined by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the holding force is lower. Additionally, even a small distance between the magnet and the plate reduces the load capacity.

Precautions when working with NdFeB magnets
This is not a toy

Only for adults. Tiny parts can be swallowed, causing intestinal necrosis. Keep away from children and animals.

Handling guide

Exercise caution. Neodymium magnets act from a long distance and connect with massive power, often faster than you can move away.

Nickel allergy

A percentage of the population have a sensitization to nickel, which is the standard coating for neodymium magnets. Frequent touching can result in an allergic reaction. It is best to use safety gloves.

Beware of splinters

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Do not overheat magnets

Do not overheat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).

Safe distance

Do not bring magnets close to a purse, laptop, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Bone fractures

Risk of injury: The pulling power is so great that it can cause hematomas, crushing, and even bone fractures. Use thick gloves.

Keep away from electronics

Note: neodymium magnets generate a field that interferes with precision electronics. Keep a safe distance from your phone, device, and navigation systems.

Pacemakers

For implant holders: Powerful magnets affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Flammability

Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Caution! Want to know more? Read our article: Are neodymium magnets dangerous?