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MW 10x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010008

GTIN/EAN: 5906301810070

5.00

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

check specifications »

0.726 ZŁ with VAT / pcs + price for transport

0.590 ZŁ net + 23% VAT / pcs

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Technical data - 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

Physical modeling of the magnet - technical parameters

The following information are the direct effect of a mathematical analysis. Values were calculated on models for the class Nd2Fe14B. Real-world conditions might slightly differ. Use these data as a supplementary guide for designers.

Table 1: Static 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
 medium risk
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
Grip strength decreases significantly with every subsequent millimeter of spacing. Note that even the smallest gap (e.g., contamination, varnish, rust) noticeably reduces the pull force. Magnetic products work strongest at the point of direct contact; gap nullifies the force. Observe how rapidly the load capacity fall, when the product does not touch tightly to the metal substrate. When calculating the arrangement, eliminate additional spacers.

Table 2: Shear hold (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
The following data presents the approximate holding capacity necessary to initiate the shifting of the magnet downwards on a upright metal surface (assuming typical friction). The holding force depends on the distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - vertical pull
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 mounting a element on a upright wall (e.g., a board), it will maintain just approx. 20%-30% of its nominal power. Gravity as well as a low friction coefficient influence the fact that holders slip easier than they pop off the substrate. Want to create a vertical fastening? Consider that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the element will slip down under a much lighter cargo. Utilizing a rubberized layer can significantly raise the stability.

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 is not enough to absorb the entire magnetic field, which squanders power of the holder. If you mount a strong magnet to a weak sheet, the field will pass right through and the pull force will drop sharply. To squeeze full efficiency of this magnet's power, you need a suitably thick element of steel. The saturation phenomenon causes that on delicate walls (e.g., car bodies), the magnet holds weaker. We recommend selecting the steel dimension according to the table below.

Table 5: Thermal resistance (stability) - 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 lose power past the thermal threshold. Protect against heat – excessive heat can irreversibly damage this product. As the temperature rises, the magnet's capacity momentarily decreases. Avoid using this magnet near heat sources exceeding its working range. Ignoring the limit will cause destruction of magnetic properties.
*Technical advisory: Temperature resistance is determined by both grade, as well as the dimension ratios. Low-profile magnets (pancake types) may lose charge permanently sooner compared to rod magnets. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MW 10x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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 wider radius than a magnet and sheet combination. The setup of magnet-to-magnet creates a more powerful interaction and a wider radius of performance. Planning to create a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Exercise caution that when bringing together two magnets, the impact force is massive. The repulsion force is slightly lower than the attraction, but still impressive.
*Flux density in repulsion mode drops to ~0 Gs at the geometric center of the gap (due to field cancellation).
* Figures refer to sliding force of dual identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - warnings
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
Timepiece 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Car key 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
Extremely neodym field is a serious hazard to electronic devices and medical implants. These NdFeB products generate a flux that destroys function of digital equipment. Be aware: the invisible magnetic field passes through tissues and housings. Exceptional care must be taken by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

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

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 35.27 km/h
(9.80 m/s)
 0.08 J
30 mm 60.88 km/h
(16.91 m/s)
 0.25 J
50 mm 78.60 km/h
(21.83 m/s)
 0.42 J
100 mm 111.15 km/h
(30.88 m/s)
 0.84 J
NdFeB products are delicate – a strong collision with metal causes immediate chipping. Control the attraction moment – a neodymium left loose speeds with massive force. Kinetic force can destroy the magnet or injury to fingers. Be sure to control the product during mounting so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear safety glasses when handling with large magnets.

Table 9: Surface protection spec
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)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction 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 passing through the pole surface. Key data for generator designers and motors. Pc value defines the working geometry.

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%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
Contrary to myths, water does not block the magnetic field. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.
1. Vertical hold

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

2. Steel saturation

*Thin steel (e.g. computer case) significantly reduces 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) = 0.40

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
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: 010008-2026
Measurement Calculator
Force (pull)
Field Strength
Input your figure in a box, to see the remaining fields change on the fly.

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The presented product is an extremely powerful cylindrical magnet, composed of durable NdFeB material, which, at dimensions of Ø10x3 mm, guarantees the highest energy density. This specific item is characterized by high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 2.15 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 21.04 N with a weight of only 1.77 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in industry, specialized industrial adhesives 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 (Ø10x3), 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 Ø10x3 mm, which, at a weight of 1.77 g, makes it an element with high 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 power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 10 mm. 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.

Strengths as well as weaknesses of rare earth magnets.

Advantages

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • They do not lose their magnetic properties even under strong external field,
  • A magnet with a shiny gold surface is more attractive,
  • Magnets exhibit exceptionally strong magnetic induction on the outer layer,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
  • Thanks to modularity in constructing and the capacity to customize to individual projects,
  • Fundamental importance in modern technologies – they serve a role in data components, electric drive systems, diagnostic systems, also industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

What to avoid - cons of neodymium magnets and proposals for their use:
  • They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Limited ability of producing nuts in the magnet and complex forms - recommended is cover - mounting mechanism.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these devices can be problematic in diagnostics medical in case of swallowing.
  • With large orders the cost of neodymium magnets is economically unviable,

Holding force characteristics

Magnetic strength at its maximum – what affects it?

The specified lifting capacity refers to the limit force, recorded under ideal test conditions, specifically:
  • using a plate made of low-carbon steel, acting as a circuit closing element
  • possessing a massiveness of at least 10 mm to avoid saturation
  • characterized by smoothness
  • under conditions of no distance (surface-to-surface)
  • under vertical force direction (90-degree angle)
  • in temp. approx. 20°C

Determinants of lifting force in real conditions

Bear in mind that the application force will differ subject to the following factors, starting with the most relevant:
  • Distance – existence of any layer (paint, tape, gap) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Direction of force – maximum parameter is available only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – mild steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
  • Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity was measured by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet and the plate reduces the lifting capacity.

Precautions when working with NdFeB magnets
Beware of splinters

Protect your eyes. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Swallowing risk

These products are not toys. Accidental ingestion of several magnets may result in them pinching intestinal walls, which constitutes a critical condition and necessitates urgent medical intervention.

Fire risk

Fire warning: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.

Pinching danger

Watch your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing everything in their path. Be careful!

Nickel coating and allergies

Nickel alert: The nickel-copper-nickel coating contains nickel. If redness appears, immediately stop working with magnets and wear gloves.

Respect the power

Handle magnets with awareness. Their immense force can surprise even professionals. Stay alert and do not underestimate their force.

Phone sensors

Navigation devices and smartphones are highly sensitive to magnetism. Direct contact with a strong magnet can permanently damage the sensors in your phone.

Danger to pacemakers

Medical warning: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Demagnetization risk

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its properties and strength.

Electronic hazard

Do not bring magnets near a purse, computer, or screen. The magnetism can destroy these devices and wipe information from cards.

Safety First! Need more info? Check our post: Why are neodymium magnets dangerous?