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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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Physical properties - 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

Physical simulation of the product - report

The following information are the outcome of a engineering simulation. Results are based on algorithms for the class Nd2Fe14B. Actual conditions may deviate from the simulation results. Use these calculations as a reference point during assembly planning.

Table 1: Static force (force vs distance) - 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
medium risk
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: Slippage hold (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: Vertical assembly (shearing) - behavior on slippery surfaces
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 (substrate influence) - power losses
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 resistance (material behavior) - thermal limit
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 (attraction) - field range
MW 10x20 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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) - warnings
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
Mobile device 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: Collisions (cracking risk) - warning
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: Coating parameters (durability)
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: Submerged application
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. Sliding resistance

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

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) severely reduces the holding force.

3. Heat tolerance

*For standard magnets, 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 and environmental data
Elemental analysis
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%
Ecology and recycling (GPSR)
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
Quick Unit Converter
Force (pull)

Field Strength

Other products

The presented product is an incredibly powerful cylinder magnet, made from advanced NdFeB material, which, with dimensions of Ø10x20 mm, guarantees maximum efficiency. This specific item features high dimensional repeatability and industrial build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 2.23 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced sensors, and efficient magnetic separators, 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 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., 10.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio 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 available off-the-shelf in our store.
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 secures it against oxidation, giving it an aesthetic, silvery shine.
This cylinder 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 through the diameter if your project requires it.

Advantages as well as disadvantages of rare earth magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even over approximately 10 years – the decrease in lifting capacity is only ~1% (theoretically),
  • They show high resistance to demagnetization induced by external field influence,
  • By applying a lustrous coating of gold, the element acquires an aesthetic look,
  • Magnetic induction on the working layer of the magnet turns out to be impressive,
  • 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 and optimizing to atypical applications,
  • Universal use in future technologies – they are utilized in data components, motor assemblies, advanced medical instruments, also complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Disadvantages

Drawbacks and weaknesses of neodymium magnets: application proposals
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
  • 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, as well as 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 - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We recommend cover - magnetic holder, due to difficulties in producing nuts inside the magnet and complex shapes.
  • Potential hazard to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products are able to be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Best holding force of the magnet in ideal parameterswhat it depends on?

Holding force of 2.23 kg is a result of laboratory testing executed under specific, ideal conditions:
  • on a block made of structural steel, optimally conducting the magnetic flux
  • with a cross-section minimum 10 mm
  • with a plane perfectly flat
  • with zero gap (no coatings)
  • under perpendicular application of breakaway force (90-degree angle)
  • in stable room temperature

Key elements affecting lifting force

It is worth knowing that the application force may be lower subject to elements below, starting with the most relevant:
  • Clearance – existence of foreign body (rust, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
  • Surface structure – the more even the surface, the better the adhesion and stronger the hold. Roughness creates an air distance.
  • Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under shearing force the holding force is lower. In addition, even a small distance between the magnet and the plate decreases the lifting capacity.

H&S for magnets
Implant safety

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.

Caution required

Be careful. Rare earth magnets attract from a distance and snap with massive power, often faster than you can react.

Phone sensors

Navigation devices and mobile phones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Magnetic media

Avoid bringing magnets near a wallet, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.

Thermal limits

Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.

Sensitization to coating

Some people experience a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Prolonged contact might lead to dermatitis. It is best to use safety gloves.

Danger to the youngest

Neodymium magnets are not intended for children. Eating a few magnets may result in them connecting inside the digestive tract, which poses a severe health hazard and requires urgent medical intervention.

Protective goggles

Neodymium magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets will cause them breaking into small pieces.

Flammability

Mechanical processing of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Crushing risk

Danger of trauma: The attraction force is so immense that it can result in hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Safety First! Need more info? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98