Neodymium magnets: strength you're looking for

Need reliable magnetic field? We have in stock complete range of various shapes and sizes. They are ideal for home use, workshop and industrial tasks. Browse assortment with fast shipping.

check magnet catalog

Equipment for treasure hunters

Discover your passion involving underwater treasure hunting! Our specialized grips (F200, F400) provide safety guarantee and immense power. Solid, corrosion-resistant housing and strong lines are reliable in any water.

find searching equipment

Reliable threaded grips

Proven solutions for fixing non-invasive. Threaded grips (external or internal) provide instant organization of work on production halls. Perfect for mounting lighting, sensors and banners.

see available threads

📦 Fast shipping: buy by 14:00, package goes out today!

Dhit sp. z o.o.
Product available Ships today (order by 14:00)

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

bulk discounts:

Need more?

price from 1 pcs
4.00 ZŁ
4.92 ZŁ
price from 150 pcs
3.76 ZŁ
4.62 ZŁ
price from 650 pcs
3.52 ZŁ
4.33 ZŁ
Want to negotiate?

Pick up the phone and ask +48 888 99 98 98 or send us a note via request form the contact form page.
Strength along with shape of a magnet can be calculated with our magnetic mass calculator.

Same-day shipping for orders placed before 14:00.

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 modeling of the product - technical parameters

Presented information constitute the result of a mathematical simulation. Results rely on models for the material Nd2Fe14B. Actual performance may differ from theoretical values. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull 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 lbs
2230.0 g / 21.9 N
warning
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: Vertical force (wall)
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: Steel thickness (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 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: Thermal resistance (stability) - 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: Two magnets (repulsion) - forces in the system
MW 10x20 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear 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: Hazards (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
Mobile device 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 (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: 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: Electrical 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: 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

*Note: On a vertical wall, the magnet retains only a fraction of its nominal pull.

2. Plate thickness effect

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

3. Heat tolerance

*For N38 material, the max working temp 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%
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
Magnet Unit Converter
Magnet pull force

Magnetic Field

View also proposals

This product is an extremely powerful rod magnet, made from advanced NdFeB material, which, at dimensions of Ø10x20 mm, guarantees maximum efficiency. This specific item is characterized by high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 2.23 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is created 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 cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the recommended way 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, 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 frequently chosen standard for professional 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 in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 10 mm and height 20 mm. The key parameter here is the lifting capacity amounting to approximately 2.23 kg (force ~21.88 N), which, with such compact dimensions, proves the high grade of the NdFeB material. 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. 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 through the diameter if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Advantages

Apart from their strong magnetic energy, neodymium magnets have these key benefits:
  • They retain magnetic properties for around ten years – the drop is just ~1% (in theory),
  • Magnets very well resist against loss of magnetization caused by external fields,
  • A magnet with a shiny silver surface is more attractive,
  • Neodymium magnets achieve maximum magnetic induction on a small surface, which increases force concentration,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures reaching 230°C and above...
  • In view of the possibility of flexible forming and customization to individualized solutions, neodymium magnets can be produced in a broad palette of shapes and sizes, which expands the range of possible applications,
  • Significant place in future technologies – they are utilized in magnetic memories, brushless drives, medical equipment, as well as multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Disadvantages

Disadvantages of NdFeB magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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
  • They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating nuts and complicated shapes in magnets, we recommend using a housing - magnetic mount.
  • Health risk resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the context of child safety. Additionally, small elements of these magnets can disrupt the diagnostic process medical after entering the body.
  • Due to expensive raw materials, their price is relatively high,

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

The declared magnet strength concerns the peak performance, recorded under optimal environment, specifically:
  • using a sheet made of high-permeability steel, functioning as a ideal flux conductor
  • with a thickness no less than 10 mm
  • with a plane free of scratches
  • under conditions of ideal adhesion (metal-to-metal)
  • for force acting at a right angle (pull-off, not shear)
  • at ambient temperature room level

Key elements affecting lifting force

Effective lifting capacity is affected by working environment parameters, mainly (from most important):
  • Clearance – existence of any layer (rust, tape, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Steel thickness – too thin plate does not accept the full field, causing part of the flux to be lost into the air.
  • Steel grade – ideal substrate is high-permeability steel. Hardened steels may attract less.
  • Smoothness – full contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.

Safe handling of NdFeB magnets
Conscious usage

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Pinching danger

Mind your fingers. Two large magnets will join instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!

Demagnetization risk

Avoid heat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Precision electronics

A strong magnetic field interferes with the functioning of magnetometers in smartphones and GPS navigation. Maintain magnets close to a smartphone to avoid damaging the sensors.

Fire warning

Powder produced during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Allergy Warning

Certain individuals have a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Extended handling can result in dermatitis. We recommend use protective gloves.

Data carriers

Do not bring magnets near a purse, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.

Eye protection

Protect your eyes. Magnets can explode upon violent connection, launching shards into the air. Wear goggles.

Medical interference

Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Danger to the youngest

Only for adults. Tiny parts can be swallowed, causing serious injuries. Store away from children and animals.

Attention! Want to know more? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98