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MW 10x30 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010009

GTIN/EAN: 5906301810087

5.00

Diameter Ø

10 mm [±0,1 mm]

Height

30 mm [±0,1 mm]

Weight

17.67 g

Magnetization Direction

↑ axial

Load capacity

1.92 kg / 18.79 N

Magnetic Induction

610.80 mT / 6108 Gs

Coating

[NiCuNi] Nickel

see technical data »

8.61 ZŁ with VAT / pcs + price for transport

7.00 ZŁ net + 23% VAT / pcs

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Technical parameters - MW 10x30 / N38 - cylindrical magnet

Specification / characteristics - MW 10x30 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010009
GTIN/EAN 5906301810087
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 30 mm [±0,1 mm]
Weight 17.67 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.92 kg / 18.79 N
Magnetic Induction ~ ? 610.80 mT / 6108 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 10x30 / 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 assembly - report

The following values represent the outcome of a engineering calculation. Results rely on algorithms for the material Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Use these data as a preliminary roadmap for designers.

Table 1: Static pull force (force vs gap) - power drop
MW 10x30 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 6103 Gs
610.3 mT
 1.92 kg / 4.23 LBS
1920.0 g / 18.8 N
 safe
1 mm 4905 Gs
490.5 mT
 1.24 kg / 2.73 LBS
1240.1 g / 12.2 N
 safe
2 mm 3823 Gs
382.3 mT
 0.75 kg / 1.66 LBS
753.3 g / 7.4 N
 safe
3 mm 2940 Gs
294.0 mT
 0.45 kg / 0.98 LBS
445.6 g / 4.4 N
 safe
5 mm 1754 Gs
175.4 mT
 0.16 kg / 0.35 LBS
158.5 g / 1.6 N
 safe
10 mm 607 Gs
60.7 mT
 0.02 kg / 0.04 LBS
19.0 g / 0.2 N
 safe
15 mm 280 Gs
28.0 mT
 0.00 kg / 0.01 LBS
4.0 g / 0.0 N
 safe
20 mm 154 Gs
15.4 mT
 0.00 kg / 0.00 LBS
1.2 g / 0.0 N
 safe
30 mm 63 Gs
6.3 mT
 0.00 kg / 0.00 LBS
0.2 g / 0.0 N
 safe
50 mm 19 Gs
1.9 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 safe
Pulling power decreases drastically with every subsequent millimeter of gap. Keep in mind that even a very thin break (e.g., contamination, varnish, dust) noticeably weakens the grip. Magnetic products hold most effectively at the point of direct contact; distance nullifies the force. Observe how rapidly the parameters drop, when the product does not touch directly to the steel surface. When designing the arrangement, eliminate redundant distances.

Table 2: Sliding capacity (vertical surface)
MW 10x30 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.38 kg / 0.85 LBS
384.0 g / 3.8 N
1 mm Stal (~0.2) 0.25 kg / 0.55 LBS
248.0 g / 2.4 N
2 mm Stal (~0.2) 0.15 kg / 0.33 LBS
150.0 g / 1.5 N
3 mm Stal (~0.2) 0.09 kg / 0.20 LBS
90.0 g / 0.9 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 / 0.01 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
The following data calculates the approximate shear load necessary to start the downward movement of the magnet down on a upright steel plate (assuming standard friction coefficient). This value depends on the gap size between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 10x30 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.58 kg / 1.27 LBS
576.0 g / 5.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.38 kg / 0.85 LBS
384.0 g / 3.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.19 kg / 0.42 LBS
192.0 g / 1.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.96 kg / 2.12 LBS
960.0 g / 9.4 N
When hanging a holder on a upright wall (e.g., a fridge), it you can count on just about 20%-30% of its maximum pull force. Gravity and a low friction coefficient cause that holders slip faster than they pull off. Designing a vertical fastening? Remember that the shear force is significantly lower than the perpendicular breakaway force. On a painted metal, the holder will give way down under a significantly smaller cargo. Application of an anti-slip layer can effectively raise the stability.

Table 4: Steel thickness (substrate influence) - power losses
MW 10x30 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.19 kg / 0.42 LBS
192.0 g / 1.9 N
1 mm
25%
 0.48 kg / 1.06 LBS
480.0 g / 4.7 N
2 mm
50%
 0.96 kg / 2.12 LBS
960.0 g / 9.4 N
3 mm
75%
 1.44 kg / 3.17 LBS
1440.0 g / 14.1 N
5 mm
100%
 1.92 kg / 4.23 LBS
1920.0 g / 18.8 N
10 mm
100%
 1.92 kg / 4.23 LBS
1920.0 g / 18.8 N
11 mm
100%
 1.92 kg / 4.23 LBS
1920.0 g / 18.8 N
12 mm
100%
 1.92 kg / 4.23 LBS
1920.0 g / 18.8 N
A too thin steel is unable to focus the full magnetic flux, which squanders power of the magnet. Should you install a neodymium to a weak sheet, the field will pass right through and the attraction force will be weaker. To squeeze 100% of this neodymium's power, you require a sufficiently solid element of metal. The saturation effect means that on sheet metal structures (e.g., thin profiles), the magnet holds weaker. We suggest choosing the steel thickness according to the table below.

Table 5: Thermal stability (material behavior) - power drop
MW 10x30 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.92 kg / 4.23 LBS
1920.0 g / 18.8 N
 OK
40 °C -2.2% 1.88 kg / 4.14 LBS
1877.8 g / 18.4 N
 OK
60 °C -4.4% 1.84 kg / 4.05 LBS
1835.5 g / 18.0 N
 OK
80 °C -6.6% 1.79 kg / 3.95 LBS
1793.3 g / 17.6 N
100 °C -28.8% 1.37 kg / 3.01 LBS
1367.0 g / 13.4 N
Classic neodymiums change their properties strength past the thermal threshold. Watch out for overheating – excessive heat can permanently demagnetize this product. As the temperature rises, the neodymium's force briefly drops. Avoid using this magnet near heat sources exceeding its working range. Ignoring the limit will lead to destruction of magnetic properties.
*Important note: Thermal stability depends not only on the material grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress compared to rod magnets. The danger warning in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 10x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 18.04 kg / 39.76 LBS
6 166 Gs
2.71 kg / 5.96 LBS
2705 g / 26.5 N
 N/A
1 mm 14.65 kg / 32.31 LBS
11 003 Gs
2.20 kg / 4.85 LBS
2198 g / 21.6 N
 13.19 kg / 29.08 LBS
~0 Gs
2 mm 11.65 kg / 25.68 LBS
9 810 Gs
1.75 kg / 3.85 LBS
1747 g / 17.1 N
 10.48 kg / 23.11 LBS
~0 Gs
3 mm 9.13 kg / 20.12 LBS
8 684 Gs
1.37 kg / 3.02 LBS
1369 g / 13.4 N
 8.21 kg / 18.11 LBS
~0 Gs
5 mm 5.45 kg / 12.02 LBS
6 710 Gs
0.82 kg / 1.80 LBS
818 g / 8.0 N
 4.91 kg / 10.82 LBS
~0 Gs
10 mm 1.49 kg / 3.28 LBS
3 507 Gs
0.22 kg / 0.49 LBS
223 g / 2.2 N
 1.34 kg / 2.95 LBS
~0 Gs
20 mm 0.18 kg / 0.39 LBS
1 213 Gs
0.03 kg / 0.06 LBS
27 g / 0.3 N
 0.16 kg / 0.35 LBS
~0 Gs
50 mm 0.00 kg / 0.01 LBS
190 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
126 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
88 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
64 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
48 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
37 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two magnetic products interact from a much further distance than a magnet and sheet setup. The connection of two magnets produces a massive flux and a larger range of action. Want to build a strong closure? Use a pair of magnets instead of a neodymium and a steel. Be careful that when connecting a pair of magnets, the impact force is massive. The levitation is slightly lower than the connection force, but still impressive.
*Flux density for N-N configuration reaches ~0 Gs in the exact middle between the magnets (resulting from vector opposition).
* Estimates show friction force of two matching magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - warnings
MW 10x30 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.5 cm
Hearing aid 10 Gs (1.0 mT) 6.5 cm
Timepiece 20 Gs (2.0 mT) 5.0 cm
Mobile device 40 Gs (4.0 mT) 4.0 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) 1.5 cm
A strong magnetic field poses a large risk to electronics and pacemakers. These magnets produce a flux that destroys function of sensitive medical devices. Be aware: the invisible magnetic field penetrates the body and glass. Increased vigilance must be taken by people with cochlear implants and insulin pumps. Also at risk are: automatic timepieces, car keys, speakers, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - warning
MW 10x30 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 10.58 km/h
(2.94 m/s)
 0.08 J
30 mm 18.21 km/h
(5.06 m/s)
 0.23 J
50 mm 23.51 km/h
(6.53 m/s)
 0.38 J
100 mm 33.24 km/h
(9.23 m/s)
 0.75 J
Neodymium magnets are very brittle – a strong collision with metal risks their cracking. Control the attraction moment – a magnet released freely speeds with massive force. Striking energy can cause material chips or painful pinches to skin. Always hold the magnet during installation so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h means shattering of the magnet. Wear eye protection when playing with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 10x30 / 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 10x30 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 528 Mx 55.3 µWb
Pc Coefficient 1.38 High (Stable)
Flux value emitted by the pole surface. Key data when building generators and motors. Pc value defines the working geometry.

Table 11: Submerged application
MW 10x30 / N38

Environment Effective steel pull Effect
Air (land) 1.92 kg Standard
Water (riverbed) 2.20 kg
(+0.28 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.
1. Sliding resistance

*Caution: On a vertical wall, the magnet retains only approx. 20-30% of its perpendicular strength.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.

3. Thermal stability

*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) = 1.38

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 and environmental data
Material specification
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%
Environmental data
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: 010009-2026
Measurement Calculator
Pulling force
Field Strength
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5.56 ZŁ brutto / pcs
The offered product is an extremely powerful cylinder magnet, produced from modern NdFeB material, which, with dimensions of Ø10x30 mm, guarantees maximum efficiency. The MW 10x30 / N38 component features high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 1.92 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 18.79 N with a weight of only 17.67 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use 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 are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need even stronger magnets in the same volume (Ø10x30), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 10 mm and height 30 mm. The value of 18.79 N means that the magnet is capable of holding a weight many times exceeding its own mass of 17.67 g. 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 diametrically if your project requires it.

Strengths as well as weaknesses of rare earth magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
  • Neodymium magnets are distinguished by exceptionally resistant to loss of magnetic properties caused by external magnetic fields,
  • Thanks to the metallic finish, the plating of nickel, gold, or silver-plated gives an modern appearance,
  • Neodymium magnets deliver maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to flexibility in forming and the ability to customize to specific needs,
  • Wide application in high-tech industry – they find application in mass storage devices, electric drive systems, medical devices, also modern systems.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Disadvantages

Disadvantages of neodymium magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • We suggest casing - magnetic holder, due to difficulties in creating threads inside the magnet and complex shapes.
  • Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products are able to disrupt the diagnostic process medical in case of swallowing.
  • Due to neodymium price, their price exceeds standard values,

Lifting parameters

Maximum magnetic pulling force – what it depends on?

Information about lifting capacity was determined for optimal configuration, assuming:
  • using a sheet made of high-permeability steel, functioning as a magnetic yoke
  • with a thickness minimum 10 mm
  • with a plane cleaned and smooth
  • under conditions of gap-free contact (surface-to-surface)
  • during pulling in a direction vertical to the plane
  • at room temperature

Determinants of lifting force in real conditions

During everyday use, the actual lifting capacity is determined by many variables, ranked from crucial:
  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Steel grade – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases force. Uneven metal reduce efficiency.
  • Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate lowers the holding force.

Warnings
Product not for children

These products are not intended for children. Eating multiple magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates immediate surgery.

Demagnetization risk

Control the heat. Heating the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Eye protection

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Handling rules

Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Avoid contact if allergic

A percentage of the population suffer from a contact allergy to Ni, which is the typical protective layer for NdFeB magnets. Prolonged contact may cause an allergic reaction. We strongly advise wear protective gloves.

Flammability

Powder generated during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Impact on smartphones

A powerful magnetic field disrupts the operation of magnetometers in phones and GPS navigation. Do not bring magnets close to a smartphone to prevent damaging the sensors.

Pinching danger

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

Health Danger

Patients with a pacemaker must keep an absolute distance from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Cards and drives

Very strong magnetic fields can destroy records on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

Warning! Looking for details? Read our article: Why are neodymium magnets dangerous?