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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

1.021 with VAT / pcs + price for transport

0.830 ZŁ net + 23% VAT / pcs

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Physical properties - 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

Technical analysis of the assembly - technical parameters

Presented information represent the outcome of a physical calculation. Results are based on models for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Use these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs gap) - 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

Table 2: Shear capacity (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

Table 3: Wall mounting (sliding) - 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

Table 4: Material efficiency (saturation) - sheet metal selection
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

Table 5: Working in heat (material behavior) - thermal limit
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

Table 6: Two magnets (repulsion) - field range
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

Table 7: Safety (HSE) (electronics) - 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
Mechanical watch 20 Gs (2.0 mT) 3.0 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Car key 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

Table 8: Collisions (cracking risk) - warning
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

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)

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)

Table 11: Hydrostatics and buoyancy
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!
1. Shear force

*Warning: On a vertical surface, the magnet retains only approx. 20-30% of its nominal pull.

2. Steel saturation

*Thin steel (e.g. computer case) severely reduces the holding force.

3. Temperature resistance

*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 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%
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: 010010-2026
Quick Unit Converter
Pulling force

Magnetic Induction

See also proposals

The offered product is an extremely powerful rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø10x4 mm, guarantees the highest energy density. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 2.80 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 27.42 N with a weight of only 2.36 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 10.1 mm) using epoxy glues. To ensure long-term durability 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 frequently chosen standard for professional 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 warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 10 mm and height 4 mm. 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.

Pros and cons of neodymium magnets.

Benefits

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • They do not lose power, even over approximately ten years – the decrease in power is only ~1% (based on measurements),
  • They do not lose their magnetic properties even under strong external field,
  • Thanks to the smooth finish, the surface of Ni-Cu-Ni, gold-plated, or silver-plated gives an professional appearance,
  • Magnets possess exceptionally strong magnetic induction on the outer layer,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
  • Possibility of individual modeling as well as optimizing to complex applications,
  • Huge importance in advanced technology sectors – they are utilized in hard drives, electric drive systems, medical devices, as well as other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases 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
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in creating threads and complex shapes in magnets, we propose using casing - magnetic mount.
  • Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small components of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what contributes to it?

The declared magnet strength concerns the limit force, obtained under ideal test conditions, meaning:
  • using a sheet made of high-permeability steel, serving as a magnetic yoke
  • with a thickness no less than 10 mm
  • with an polished touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • during detachment in a direction vertical to the plane
  • at ambient temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

Bear in mind that the working load will differ subject to elements below, starting with the most relevant:
  • Space between magnet and steel – every millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Direction of force – highest force is available only during pulling at a 90° angle. The shear force of the magnet along the surface is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
  • Metal type – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
  • Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a small distance between the magnet’s surface and the plate reduces the holding force.

H&S for magnets
Finger safety

Pinching hazard: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Danger to pacemakers

People with a pacemaker must keep an large gap from magnets. The magnetic field can disrupt the operation of the life-saving device.

Power loss in heat

Watch the temperature. Exposing the magnet to high heat will permanently weaken its magnetic structure and pulling force.

Threat to navigation

Note: neodymium magnets generate a field that disrupts precision electronics. Maintain a separation from your phone, device, and navigation systems.

Eye protection

Despite the nickel coating, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

Keep away from children

Adult use only. Tiny parts can be swallowed, leading to serious injuries. Keep away from children and animals.

Keep away from computers

Equipment safety: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).

Allergy Warning

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, avoid direct skin contact and opt for encased magnets.

Dust is flammable

Machining of NdFeB material poses a fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Conscious usage

Handle magnets with awareness. Their huge power can shock even professionals. Stay alert and respect their force.

Warning! Details about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98