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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 specifications »

8.61 ZŁ with VAT / pcs + price for transport

7.00 ZŁ net + 23% VAT / pcs

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Strength along with shape of neodymium magnets can be estimated with our modular calculator.

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Detailed specification - 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

Engineering modeling of the assembly - technical parameters

The following data constitute the outcome of a mathematical calculation. Results are based on models for the class Nd2Fe14B. Operational performance may differ. Treat these calculations as a supplementary guide for designers.

Table 1: Static pull force (force vs distance) - 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
 weak grip
1 mm 4905 Gs
490.5 mT
 1.24 kg / 2.73 lbs
1240.1 g / 12.2 N
 weak grip
2 mm 3823 Gs
382.3 mT
 0.75 kg / 1.66 lbs
753.3 g / 7.4 N
 weak grip
3 mm 2940 Gs
294.0 mT
 0.45 kg / 0.98 lbs
445.6 g / 4.4 N
 weak grip
5 mm 1754 Gs
175.4 mT
 0.16 kg / 0.35 lbs
158.5 g / 1.6 N
 weak grip
10 mm 607 Gs
60.7 mT
 0.02 kg / 0.04 lbs
19.0 g / 0.2 N
 weak grip
15 mm 280 Gs
28.0 mT
 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
 weak grip
20 mm 154 Gs
15.4 mT
 0.00 kg / 0.00 lbs
1.2 g / 0.0 N
 weak grip
30 mm 63 Gs
6.3 mT
 0.00 kg / 0.00 lbs
0.2 g / 0.0 N
 weak grip
50 mm 19 Gs
1.9 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 weak grip
Pulling power weakens sharply with every mm of spacing. Remember that even the smallest gap (e.g., contamination, paint, rust) noticeably reduces the pull force. Neodymiums work optimally in perfect adhesion; gap weakens the force. Observe how flashily the parameters drop, when the product does not touch directly to the steel surface. When calculating the mounting, eliminate additional spacers.

Table 2: Slippage load (wall)
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
This section presents the theoretical weight limit necessary to initiate the shifting of the magnet downwards along a vertical steel wall (considering typical friction coefficient). This parameter varies with the distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
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 element on a vertical plane (e.g., a fridge), it will maintain barely approx. 1/5 of nominal attraction strength. Gravitational force and a low friction coefficient cause that products slide down faster than they pull off. Designing a vertical fastening? Consider that the sliding force is much weaker than the perpendicular breakaway force. On a slippery surface, the holder will slide down under a much lighter cargo. Application of an anti-slip coating can significantly increase the grip.

Table 4: Steel thickness (saturation) - 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 conduct the full magnetic flux, which wastes potential of the holder. Should you attach a powerful product to a too thin substrate, the magnetism will pass right through and the pull force will drop sharply. To squeeze 100% of this neodymium's potential, you require a sufficiently solid backing of steel. The material oversaturation causes that on thin elements (e.g., thin profiles), the magnet shows lower pull force. We advise picking the steel dimension from these parameters.

Table 5: Thermal resistance (stability) - resistance threshold
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
Standard neodymium magnets irreversibly lose parameters above the temperature limit. Protect against heat – excessive heat can permanently destroy this magnet. As the temperature rises, the magnet's capacity briefly lowers. Avoid using this magnet near heat sources higher than its working range. Exceeding the critical threshold will result in destruction of magnetism.
*Technical advisory: Thermal stability is determined by both grade, but also on the magnet's shape. Low-profile magnets (low permeance coefficient) risk losing magnetic properties sooner than long magnets. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field collision
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 magnets attract each other from a wider radius than a magnet and sheet combination. Such a system of two magnets produces a massive flux and a further horizon of operation. Want to build a strong closure? Apply two magnets instead of a neodymium and a striker plate. Exercise caution that when attracting two neodymiums, the pinch force is massive. The levitation is a bit weaker than the attraction, but still significant.
*The magnetic induction between like poles is approximately ~0 Gs in the exact middle of the gap (due to field cancellation).
* Results refer to sliding force of a pair of identical magnets (friction coefficient ~0.15 for Ni-Ni plating).

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
Mechanical watch 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
Extremely neodym field poses a real danger to electronic devices as well as medical implants. These NdFeB products generate a field that disrupts operation of digital equipment. Remember: the unseen radiation acts through matter and glass. Special caution must be exercised by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, car keys, membranes, and displays. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
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
Magnetic elements are delicate – a violent impact against metal causes immediate chipping. Watch the impact speed – a neodymium left loose speeds with massive force. Kinetic force can trigger coating fragments or painful pinches to skin. Be sure to control the product during installation so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear eye protection when working with large magnets.

Table 9: Coating parameters (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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
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. Essential parameter in coil applications and motors. Pc value determines the working geometry.

Table 11: Hydrostatics and buoyancy
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%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
The magnetic field penetrates through water without any losses. However, remember the water resistance when pulling the rope quickly.
1. Vertical hold

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

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Temperature resistance

*For standard magnets, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.38

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
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: 010009-2026
Magnet Unit Converter
Magnet pull force
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The offered product is an incredibly powerful rod magnet, produced from modern NdFeB material, which, at dimensions of Ø10x30 mm, guarantees the highest energy density. This specific item features an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 1.92 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring 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 18.79 N with a weight of only 17.67 g, this rod is indispensable in electronics and wherever low weight is crucial.
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 precision component. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets N38 are strong enough for the majority of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest 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.
This model is characterized by dimensions Ø10x30 mm, which, at a weight of 17.67 g, makes it an element with high magnetic energy density. 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. Such an arrangement is standard 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 diametrically if your project requires it.

Strengths and weaknesses of neodymium magnets.

Pros

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They retain magnetic properties for almost 10 years – the loss is just ~1% (according to analyses),
  • They retain their magnetic properties even under strong external field,
  • Thanks to the smooth finish, the plating of Ni-Cu-Ni, gold-plated, or silver gives an professional appearance,
  • Neodymium magnets generate maximum magnetic induction on a small surface, which increases force concentration,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
  • Thanks to the possibility of flexible shaping and customization to specialized projects, neodymium magnets can be created in a variety of shapes and sizes, which makes them more universal,
  • Wide application in modern industrial fields – they are used in computer drives, electric drive systems, medical equipment, also modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We recommend cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated shapes.
  • Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small elements of these magnets are able to complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what contributes to it?

The lifting capacity listed is a measurement result executed under the following configuration:
  • on a base made of structural steel, perfectly concentrating the magnetic field
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with a surface cleaned and smooth
  • under conditions of ideal adhesion (metal-to-metal)
  • under axial application of breakaway force (90-degree angle)
  • in temp. approx. 20°C

What influences lifting capacity in practice

Holding efficiency is affected by specific conditions, mainly (from most important):
  • Clearance – existence of any layer (rust, dirt, gap) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Steel type – mild steel attracts best. Higher carbon content reduce magnetic properties and lifting capacity.
  • Surface finish – full contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Temperature – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Lifting capacity was determined using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet and the plate reduces the lifting capacity.

Safe handling of NdFeB magnets
Phone sensors

A strong magnetic field negatively affects the functioning of compasses in phones and navigation systems. Keep magnets close to a smartphone to avoid breaking the sensors.

Medical interference

Warning for patients: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or request help to work with the magnets.

Do not overheat magnets

Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. Damage is permanent.

Swallowing risk

Neodymium magnets are not suitable for play. Accidental ingestion of several magnets may result in them attracting across intestines, which constitutes a direct threat to life and requires urgent medical intervention.

Finger safety

Large magnets can crush fingers in a fraction of a second. Under no circumstances put your hand between two attracting surfaces.

Data carriers

Avoid bringing magnets near a purse, computer, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Skin irritation risks

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness appears, immediately stop handling magnets and use protective gear.

Material brittleness

Neodymium magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets leads to them breaking into shards.

Caution required

Handle magnets with awareness. Their immense force can surprise even professionals. Plan your moves and respect their power.

Machining danger

Dust generated during machining of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Danger! Need more info? Read our article: Why are neodymium magnets dangerous?