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MW 10x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010008

GTIN/EAN: 5906301810070

5.00
Load capacity 2.15 kg / 21.04 N Magnetic Induction 318.70 mT / 3187 Gs
Diameter Ø
10 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
1.77 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
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0.726 zł with VAT / pcs + price for transport

0.590 zł net + 23% VAT / pcs

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Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Technical of the product - MW 10x3 / N38 - cylindrical magnet

Specification / characteristics - MW 10x3 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010008
GTIN/EAN 5906301810070
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 3 mm [±0,1 mm]
Weight 1.77 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.15 kg / 21.04 N
Magnetic Induction ~ ? 318.70 mT / 3187 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 10x3 / 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 simulation of the product - report

The following values are the outcome of a physical analysis. Results were calculated on models for the class Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs gap) - power drop
MW 10x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3185 Gs
318.5 mT
 2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
 strong
1 mm 2657 Gs
265.7 mT
 1.50 kg / 3.30 LBS
1496.2 g / 14.7 N
 safe
2 mm 2081 Gs
208.1 mT
 0.92 kg / 2.02 LBS
918.1 g / 9.0 N
 safe
3 mm 1573 Gs
157.3 mT
 0.52 kg / 1.16 LBS
524.4 g / 5.1 N
 safe
5 mm 874 Gs
87.4 mT
 0.16 kg / 0.36 LBS
161.7 g / 1.6 N
 safe
10 mm 241 Gs
24.1 mT
 0.01 kg / 0.03 LBS
12.3 g / 0.1 N
 safe
15 mm 92 Gs
9.2 mT
 0.00 kg / 0.00 LBS
1.8 g / 0.0 N
 safe
20 mm 44 Gs
4.4 mT
 0.00 kg / 0.00 LBS
0.4 g / 0.0 N
 safe
30 mm 14 Gs
1.4 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
50 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
Magnetic force decreases sharply with every subsequent millimeter of distance. Remember that every additional insulation layer (e.g., contamination, paint, veneer) noticeably reduces the pull force. Magnetic products operate optimally in perfect adhesion; gap weakens the power. Notice how rapidly the parameters plummet, when the product does not touch directly to the steel surface. When calculating the arrangement, eliminate unnecessary gaps.

Table 2: Sliding force (wall)
MW 10x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.43 kg / 0.95 LBS
430.0 g / 4.2 N
1 mm Stal (~0.2) 0.30 kg / 0.66 LBS
300.0 g / 2.9 N
2 mm Stal (~0.2) 0.18 kg / 0.41 LBS
184.0 g / 1.8 N
3 mm Stal (~0.2) 0.10 kg / 0.23 LBS
104.0 g / 1.0 N
5 mm Stal (~0.2) 0.03 kg / 0.07 LBS
32.0 g / 0.3 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 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
This section calculates the theoretical holding capacity necessary to start the sliding of the magnet downwards against a upright metal surface (assuming typical friction). The holding force is relative to the separation distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 10x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.64 kg / 1.42 LBS
645.0 g / 6.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.43 kg / 0.95 LBS
430.0 g / 4.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.22 kg / 0.47 LBS
215.0 g / 2.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.08 kg / 2.37 LBS
1075.0 g / 10.5 N
When hanging a holder on a vertical plane (e.g., a car body), it will only hold only about 1/5 of its nominal power. Gravitational force and a weak degree of grip cause that holders slide down easier than they pop off the substrate. Want to create a hanger? Note that the shear force is significantly lower than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a noticeably lighter weight. Application of an anti-slip coating can drastically increase the grip.

Table 4: Steel thickness (substrate influence) - power losses
MW 10x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.22 kg / 0.47 LBS
215.0 g / 2.1 N
1 mm
25%
 0.54 kg / 1.18 LBS
537.5 g / 5.3 N
2 mm
50%
 1.08 kg / 2.37 LBS
1075.0 g / 10.5 N
3 mm
75%
 1.61 kg / 3.55 LBS
1612.5 g / 15.8 N
5 mm
100%
 2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
10 mm
100%
 2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
11 mm
100%
 2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
12 mm
100%
 2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
A too thin steel cannot absorb the full magnetic flux, which squanders power of the holder. Should you mount a strong magnet to a too thin substrate, the flux will penetrate right through and the holding will be smaller. To squeeze the maximum of this neodymium's potential, you require a sufficiently solid piece of metal. The saturation effect means that on thin elements (e.g., appliance housings), the magnet works worse. We suggest choosing the steel dimension from these parameters.

Table 5: Thermal resistance (material behavior) - power drop
MW 10x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
 OK
40 °C -2.2% 2.10 kg / 4.64 LBS
2102.7 g / 20.6 N
 OK
60 °C -4.4% 2.06 kg / 4.53 LBS
2055.4 g / 20.2 N
80 °C -6.6% 2.01 kg / 4.43 LBS
2008.1 g / 19.7 N
100 °C -28.8% 1.53 kg / 3.37 LBS
1530.8 g / 15.0 N
Classic neodymiums change their properties strength past the thermal threshold. Protect against heat – excessive heat can irreversibly destroy this product. As the temperature rises, the neodymium's force briefly drops. Do not use this magnet close to heaters higher than its safe range. Exceeding the critical threshold will result in irreversible degradation of magnetism.
*Engineering note: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Thin magnets (pancake types) may lose charge permanently under lower heat stress than long magnets. Red status in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 10x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.91 kg / 10.83 LBS
4 754 Gs
0.74 kg / 1.62 LBS
737 g / 7.2 N
 N/A
1 mm 4.18 kg / 9.22 LBS
5 877 Gs
0.63 kg / 1.38 LBS
627 g / 6.2 N
 3.76 kg / 8.30 LBS
~0 Gs
2 mm 3.42 kg / 7.54 LBS
5 314 Gs
0.51 kg / 1.13 LBS
513 g / 5.0 N
 3.08 kg / 6.78 LBS
~0 Gs
3 mm 2.71 kg / 5.98 LBS
4 732 Gs
0.41 kg / 0.90 LBS
407 g / 4.0 N
 2.44 kg / 5.38 LBS
~0 Gs
5 mm 1.59 kg / 3.52 LBS
3 630 Gs
0.24 kg / 0.53 LBS
239 g / 2.3 N
 1.44 kg / 3.16 LBS
~0 Gs
10 mm 0.37 kg / 0.81 LBS
1 747 Gs
0.06 kg / 0.12 LBS
55 g / 0.5 N
 0.33 kg / 0.73 LBS
~0 Gs
20 mm 0.03 kg / 0.06 LBS
483 Gs
0.00 kg / 0.01 LBS
4 g / 0.0 N
 0.03 kg / 0.06 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
48 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
29 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
19 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
13 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
9 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
7 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two magnetic products attract each other from a significantly greater distance than a neodymium and metal setup. Such a system of magnet-to-magnet generates a stronger field and a wider radius of operation. Designing a powerful holder? Use a pair of magnets instead of one magnet and a striker plate. Remember that when connecting a pair of magnets, the pinch force is huge. The levitation is a bit weaker than the attraction, but still large.
*Flux density between like poles reaches ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Note: Figures refer to sliding force of dual matching magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - precautionary measures
MW 10x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.0 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Remote 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Powerful magnet radiation poses a serious hazard to IT equipment and pacemakers. These NdFeB products generate a field that prevents correct functioning of sensitive medical devices. Notice: the invisible magnetic field passes through tissues and housings. Exceptional care must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: mechanical watches, car keys, membranes, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - warning
MW 10x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 25.76 km/h
(7.16 m/s)
 0.05 J
30 mm 25.85 km/h
(7.18 m/s)
 0.05 J
50 mm 25.85 km/h
(7.18 m/s)
 0.05 J
100 mm 25.85 km/h
(7.18 m/s)
 0.05 J
NdFeB products are delicate – a violent impact against metal can result in shattering. Watch the impact speed – a magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or injury to skin. Be sure to control the product during installation so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear eye protection when playing with large magnets.

Table 9: Corrosion resistance
MW 10x3 / 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)
Neodymium magnets are highly susceptible to corrosion without proper protection. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Pc)
MW 10x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 694 Mx 26.9 µWb
Pc Coefficient 0.40 Low (Flat)
Flux value emitted by the pole surface. Essential parameter in coil applications as well as sensors. Pc value determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MW 10x3 / N38

Environment Effective steel pull Effect
Air (land) 2.15 kg Standard
Water (riverbed) 2.46 kg
(+0.31 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!
In water, the magnet feels stronger thanks to Archimedes' principle. However, remember the water resistance when pulling the rope quickly.

1. Wall mount (shear)

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

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) significantly limits the holding force.

3. Temperature resistance

*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) = 0.40

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

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: 010008-2026
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This product is a very strong cylindrical magnet, made from modern NdFeB material, which, with dimensions of Ø10x3 mm, guarantees maximum efficiency. This specific item 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. 2.15 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 21.04 N with a weight of only 1.77 g, this rod is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 10.1 mm) using epoxy glues. To ensure stability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are strong enough for the majority of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø10x3), 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 Ø10x3 mm, which, at a weight of 1.77 g, makes it an element with impressive magnetic energy density. The key parameter here is the holding force amounting to approximately 2.15 kg (force ~21.04 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 3 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.

Pros as well as cons of neodymium magnets.

Strengths

Apart from their notable magnetic energy, neodymium magnets have these key benefits:
  • They virtually do not lose power, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
  • They possess excellent resistance to magnetic field loss as a result of external fields,
  • In other words, due to the glossy finish of gold, the element becomes visually attractive,
  • Magnets are characterized by maximum magnetic induction on the active area,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Possibility of accurate shaping and optimizing to individual needs,
  • Huge importance in electronics industry – they serve a role in computer drives, motor assemblies, medical equipment, also multitasking production systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Cons

What to avoid - cons of neodymium magnets and proposals for their use:
  • At very strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening 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 rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Limited ability of making threads in the magnet and complex forms - recommended is casing - mounting mechanism.
  • Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small components of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • Due to expensive raw materials, their price exceeds standard values,

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

Holding force of 2.15 kg is a theoretical maximum value executed under standard conditions:
  • using a sheet made of high-permeability steel, acting as a magnetic yoke
  • whose thickness reaches at least 10 mm
  • with an ground touching surface
  • with direct contact (without coatings)
  • during detachment in a direction perpendicular to the mounting surface
  • in neutral thermal conditions

Practical aspects of lifting capacity – factors

During everyday use, the real power depends on many variables, ranked from crucial:
  • Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Angle of force application – maximum parameter is available only during perpendicular pulling. The shear force of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Material composition – different alloys attracts identically. Alloy additives weaken the attraction effect.
  • Smoothness – full contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
  • Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Safe handling of NdFeB magnets
Choking Hazard

Absolutely keep magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are very dangerous.

Nickel allergy

A percentage of the population have a contact allergy to nickel, which is the typical protective layer for NdFeB magnets. Extended handling can result in skin redness. We suggest wear safety gloves.

Permanent damage

Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its properties and strength.

Electronic devices

Powerful magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.

Conscious usage

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Precision electronics

A powerful magnetic field disrupts the operation of compasses in smartphones and navigation systems. Maintain magnets near a smartphone to prevent breaking the sensors.

Flammability

Powder created during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Pinching danger

Protect your hands. Two powerful magnets will snap together immediately with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Magnet fragility

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets will cause them cracking into shards.

Danger to pacemakers

For implant holders: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or request help to handle the magnets.

Important! Want to know more? Read our article: Why are neodymium magnets dangerous?