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MW 10x4 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010010

GTIN/EAN: 5906301810094

5.00

Diameter Ø

10 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

2.36 g

Magnetization Direction

↑ axial

Load capacity

2.80 kg / 27.42 N

Magnetic Induction

386.91 mT / 3869 Gs

Coating

[NiCuNi] Nickel

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1.021 ZŁ with VAT / pcs + price for transport

0.830 ZŁ net + 23% VAT / pcs

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Technical details - MW 10x4 / N38 - cylindrical magnet

Specification / characteristics - MW 10x4 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010010
GTIN/EAN 5906301810094
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 4 mm [±0,1 mm]
Weight 2.36 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.80 kg / 27.42 N
Magnetic Induction ~ ? 386.91 mT / 3869 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 10x4 / 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 assembly - report

Presented values constitute the direct effect of a mathematical simulation. Values are based on models for the material Nd2Fe14B. Real-world parameters may differ from theoretical values. Use these calculations as a reference point when designing systems.

Table 1: Static force (force vs distance) - characteristics
MW 10x4 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3867 Gs
386.7 mT
 2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
 strong
1 mm 3168 Gs
316.8 mT
 1.88 kg / 4.14 LBS
1879.8 g / 18.4 N
 low risk
2 mm 2460 Gs
246.0 mT
 1.13 kg / 2.50 LBS
1133.7 g / 11.1 N
 low risk
3 mm 1855 Gs
185.5 mT
 0.64 kg / 1.42 LBS
644.6 g / 6.3 N
 low risk
5 mm 1036 Gs
103.6 mT
 0.20 kg / 0.44 LBS
200.9 g / 2.0 N
 low risk
10 mm 293 Gs
29.3 mT
 0.02 kg / 0.04 LBS
16.1 g / 0.2 N
 low risk
15 mm 114 Gs
11.4 mT
 0.00 kg / 0.01 LBS
2.4 g / 0.0 N
 low risk
20 mm 55 Gs
5.5 mT
 0.00 kg / 0.00 LBS
0.6 g / 0.0 N
 low risk
30 mm 18 Gs
1.8 mT
 0.00 kg / 0.00 LBS
0.1 g / 0.0 N
 low risk
50 mm 4 Gs
0.4 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
Magnetic force drops significantly with every mm of distance. Keep in mind that even a very thin break (e.g., contamination, paint, veneer) strongly diminishes the holding power. Magnets operate optimally at the point of direct contact; gap drastically cuts the power. Notice how flashily the parameters drop, when the product does not adhere tightly to the steel surface. When designing the assembly, avoid unnecessary gaps.

Table 2: Shear load (vertical surface)
MW 10x4 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.56 kg / 1.23 LBS
560.0 g / 5.5 N
1 mm Stal (~0.2) 0.38 kg / 0.83 LBS
376.0 g / 3.7 N
2 mm Stal (~0.2) 0.23 kg / 0.50 LBS
226.0 g / 2.2 N
3 mm Stal (~0.2) 0.13 kg / 0.28 LBS
128.0 g / 1.3 N
5 mm Stal (~0.2) 0.04 kg / 0.09 LBS
40.0 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
This section indicates the estimated holding capacity required to start the shifting of the magnet down along a vertical metal surface (assuming typical friction coefficient). This value is relative to the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 10x4 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.84 kg / 1.85 LBS
840.0 g / 8.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.28 kg / 0.62 LBS
280.0 g / 2.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.40 kg / 3.09 LBS
1400.0 g / 13.7 N
When placing a element on a upright plane (e.g., a fridge), it you can count on only about 20%-30% of its maximum pull force. Gravitational force and a weak degree of grip cause that products slide down faster than they pop off the substrate. Want to create a wall mount? Note that the shear force is noticeably lower than the perpendicular breakaway force. On a painted metal, the element will slip down under a noticeably lighter cargo. Using a rubber coating can effectively improve the result.

Table 4: Material efficiency (saturation) - power losses
MW 10x4 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.28 kg / 0.62 LBS
280.0 g / 2.7 N
1 mm
25%
 0.70 kg / 1.54 LBS
700.0 g / 6.9 N
2 mm
50%
 1.40 kg / 3.09 LBS
1400.0 g / 13.7 N
3 mm
75%
 2.10 kg / 4.63 LBS
2100.0 g / 20.6 N
5 mm
100%
 2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
10 mm
100%
 2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
11 mm
100%
 2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
12 mm
100%
 2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
A too thin steel is unable to conduct the entire magnetic field, which weakens actual performance of the magnet. Should you mount a strong magnet to a thin surface, the magnetism will pass right through and the holding will be smaller. To utilize full efficiency of this magnet's power, you need a suitably thick backing of steel. The saturation phenomenon causes that on thin elements (e.g., appliance housings), the magnet holds weaker. We recommend selecting the steel cross-section based on the following data.

Table 5: Thermal stability (stability) - power drop
MW 10x4 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
 OK
40 °C -2.2% 2.74 kg / 6.04 LBS
2738.4 g / 26.9 N
 OK
60 °C -4.4% 2.68 kg / 5.90 LBS
2676.8 g / 26.3 N
80 °C -6.6% 2.62 kg / 5.77 LBS
2615.2 g / 25.7 N
100 °C -28.8% 1.99 kg / 4.40 LBS
1993.6 g / 19.6 N
Standard neodymium magnets irreversibly lose parameters above the temperature limit. Avoid high temperatures – heat can permanently damage this product. With every degree above norm, the neodymium's force temporarily lowers. Avoid using this product in hot environments higher than its working range. Too high temperature will cause destruction of magnetic properties.
*Technical advisory: Temperature resistance is determined by both grade, but also on the magnet's shape. Low-profile magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures than long magnets. The danger warning in the table points to a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 10x4 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 7.24 kg / 15.96 LBS
5 247 Gs
1.09 kg / 2.39 LBS
1086 g / 10.7 N
 N/A
1 mm 6.04 kg / 13.31 LBS
7 061 Gs
0.91 kg / 2.00 LBS
905 g / 8.9 N
 5.43 kg / 11.98 LBS
~0 Gs
2 mm 4.86 kg / 10.71 LBS
6 336 Gs
0.73 kg / 1.61 LBS
729 g / 7.2 N
 4.37 kg / 9.64 LBS
~0 Gs
3 mm 3.81 kg / 8.41 LBS
5 612 Gs
0.57 kg / 1.26 LBS
572 g / 5.6 N
 3.43 kg / 7.56 LBS
~0 Gs
5 mm 2.22 kg / 4.90 LBS
4 283 Gs
0.33 kg / 0.73 LBS
333 g / 3.3 N
 2.00 kg / 4.41 LBS
~0 Gs
10 mm 0.52 kg / 1.15 LBS
2 071 Gs
0.08 kg / 0.17 LBS
78 g / 0.8 N
 0.47 kg / 1.03 LBS
~0 Gs
20 mm 0.04 kg / 0.09 LBS
587 Gs
0.01 kg / 0.01 LBS
6 g / 0.1 N
 0.04 kg / 0.08 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
61 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
37 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
24 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
16 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
12 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
9 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two strong neodymiums interact from a wider radius than a neodymium and metal setup. The setup of two magnets creates a more powerful interaction and a wider radius of action. Want to build a powerful holder? Utilize two neodymiums instead of a neodymium and a steel. Exercise caution that when connecting a pair of magnets, the impact force is huge. The repulsion force is a bit weaker than the attraction, but still large.
*Field value in repulsion mode is approximately ~0 Gs at the geometric center between the magnets (due to field cancellation).
Attention: Results show friction force of two matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - precautionary measures
MW 10x4 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.0 cm
Hearing aid 10 Gs (1.0 mT) 4.0 cm
Timepiece 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Remote 50 Gs (5.0 mT) 2.5 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 poses a serious hazard to IT equipment and medical implants. These NdFeB products generate a flux that disrupts operation of sensitive medical devices. Remember: the unseen radiation passes through tissues and housings. Special caution must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MW 10x4 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 34.86 km/h
(9.68 m/s)
 0.11 J
30 mm 60.17 km/h
(16.71 m/s)
 0.33 J
50 mm 77.68 km/h
(21.58 m/s)
 0.55 J
100 mm 109.85 km/h
(30.51 m/s)
 1.10 J
Neodymium magnets are prone to chipping – a strong collision with metal causes immediate chipping. Watch the impact speed – a neodymium left loose speeds with massive force. Kinetic force can cause material chips or painful pinches to fingers. Hold the magnet firmly during bringing near metal so it doesn't slam with momentum against the metal. A collision at high speed almost guarantees destruction of the magnet. Wear eye protection when working with large magnets.

Table 9: Surface protection spec
MW 10x4 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MW 10x4 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 142 Mx 31.4 µWb
Pc Coefficient 0.50 Low (Flat)
Flux value emitted by the magnet pole. Essential parameter when building generators and motors. The Pc coefficient defines the magnet's operating point.

Table 11: Physics of underwater searching
MW 10x4 / N38

Environment Effective steel pull Effect
Air (land) 2.80 kg Standard
Water (riverbed) 3.21 kg
(+0.41 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!
Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.
1. Vertical hold

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

2. Steel saturation

*Thin steel (e.g. computer case) significantly 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) = 0.50

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
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: 010010-2026
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This product is an exceptionally strong cylindrical magnet, composed of durable NdFeB material, which, with dimensions of Ø10x4 mm, guarantees maximum efficiency. The MW 10x4 / N38 component boasts a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 2.80 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 27.42 N with a weight of only 2.36 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, 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 durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø10x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
This model is characterized by dimensions Ø10x4 mm, which, at a weight of 2.36 g, makes it an element with impressive magnetic energy density. The value of 27.42 N means that the magnet is capable of holding a weight many times exceeding its own mass of 2.36 g. The product has a [NiCuNi] coating, which secures it 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.

Advantages and disadvantages of neodymium magnets.

Pros

Apart from their superior holding force, neodymium magnets have these key benefits:
  • They do not lose magnetism, even over nearly ten years – the reduction in lifting capacity is only ~1% (according to tests),
  • Neodymium magnets are extremely resistant to magnetic field loss caused by external magnetic fields,
  • In other words, due to the reflective layer of silver, the element gains visual value,
  • The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of detailed creating and adapting to individual applications,
  • Huge importance in modern technologies – they find application in HDD drives, brushless drives, advanced medical instruments, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which allows their use in small systems

Weaknesses

Cons of neodymium magnets: tips and applications.
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength 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
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing nuts and complicated forms in magnets, we propose using cover - magnetic mechanism.
  • Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these magnets can complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Magnetic strength at its maximum – what it depends on?

The declared magnet strength concerns the limit force, obtained under ideal test conditions, namely:
  • with the use of a yoke made of low-carbon steel, ensuring full magnetic saturation
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • without any insulating layer between the magnet and steel
  • under perpendicular force direction (90-degree angle)
  • in temp. approx. 20°C

Lifting capacity in practice – influencing factors

It is worth knowing that the working load will differ influenced by elements below, in order of importance:
  • Gap between magnet and steel – every millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Direction of force – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin plate does not accept the full field, causing part of the power to be lost to the other side.
  • Metal type – not every steel reacts the same. High carbon content weaken the attraction effect.
  • Smoothness – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with neodymium magnets
Allergy Warning

Certain individuals suffer from a hypersensitivity to Ni, which is the common plating for neodymium magnets. Extended handling can result in dermatitis. We recommend use protective gloves.

Threat to navigation

Note: rare earth magnets generate a field that confuses sensitive sensors. Maintain a separation from your mobile, device, and GPS.

Fire warning

Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Safe distance

Avoid bringing magnets near a wallet, computer, or screen. The magnetism can irreversibly ruin these devices and wipe information from cards.

Operating temperature

Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.

Product not for children

NdFeB magnets are not toys. Eating several magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and requires immediate surgery.

Bone fractures

Danger of trauma: The pulling power is so immense that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Handling rules

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

Pacemakers

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Shattering risk

Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Caution! More info about risks in the article: Safety of working with magnets.