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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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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 magnet - report

The following values represent the outcome of a mathematical analysis. Results were calculated on models for the material Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Please consider these data 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
warning
1 mm 3168 Gs
316.8 mT
1.88 kg / 4.14 lbs
1879.8 g / 18.4 N
safe
2 mm 2460 Gs
246.0 mT
1.13 kg / 2.50 lbs
1133.7 g / 11.1 N
safe
3 mm 1855 Gs
185.5 mT
0.64 kg / 1.42 lbs
644.6 g / 6.3 N
safe
5 mm 1036 Gs
103.6 mT
0.20 kg / 0.44 lbs
200.9 g / 2.0 N
safe
10 mm 293 Gs
29.3 mT
0.02 kg / 0.04 lbs
16.1 g / 0.2 N
safe
15 mm 114 Gs
11.4 mT
0.00 kg / 0.01 lbs
2.4 g / 0.0 N
safe
20 mm 55 Gs
5.5 mT
0.00 kg / 0.00 lbs
0.6 g / 0.0 N
safe
30 mm 18 Gs
1.8 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
safe
50 mm 4 Gs
0.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe

Table 2: Sliding force (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: Vertical assembly (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 (substrate influence) - 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

Table 5: Thermal resistance (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: Magnet-Magnet interaction (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) - warnings
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
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

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

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 (Pc)
MW 10x4 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 142 Mx 31.4 µWb
Pc Coefficient 0.50 Low (Flat)

Table 11: Submerged application
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%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet holds just approx. 20-30% of its max power.

2. Plate thickness effect

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

3. Heat tolerance

*For N38 material, 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.

Engineering data and GPSR
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: 010010-2026
Magnet Unit Converter
Magnet pull force

Magnetic Induction

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This product is an exceptionally strong rod magnet, composed of durable NdFeB material, which, at dimensions of Ø10x4 mm, guarantees optimal power. The MW 10x4 / N38 model boasts high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 2.80 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring 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 every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need even stronger 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 key parameter here is the lifting capacity amounting to approximately 2.80 kg (force ~27.42 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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 most desirable 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 through the diameter if your project requires it.

Strengths as well as weaknesses of neodymium magnets.

Strengths

Besides their immense field intensity, neodymium magnets offer the following advantages:
  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
  • Magnets perfectly protect themselves against demagnetization caused by ambient magnetic noise,
  • The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to versatility in constructing and the ability to adapt to individual projects,
  • Versatile presence in advanced technology sectors – they serve a role in data components, drive modules, diagnostic systems, as well as modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • 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
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We suggest cover - magnetic mount, due to difficulties in producing threads inside the magnet and complex shapes.
  • Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, tiny parts of these products are able to complicate diagnosis medical when they are in the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Pull force analysis

Maximum holding power of the magnet – what it depends on?

Information about lifting capacity was determined for the most favorable conditions, including:
  • using a sheet made of high-permeability steel, serving as a ideal flux conductor
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with a plane cleaned and smooth
  • without any air gap between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • at room temperature

Key elements affecting lifting force

Bear in mind that the application force may be lower influenced by elements below, starting with the most relevant:
  • Distance – existence of any layer (rust, dirt, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Load vector – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the surface is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – too thin plate does not close the flux, causing part of the flux to be lost into the air.
  • Material composition – not every steel reacts the same. Alloy additives worsen the interaction with the magnet.
  • Surface finish – full contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Temperature influence – hot environment reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate reduces the lifting capacity.

Safety rules for work with neodymium magnets
Data carriers

Avoid bringing magnets close to a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Nickel allergy

A percentage of the population experience a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Extended handling may cause an allergic reaction. It is best to use safety gloves.

Do not overheat magnets

Do not overheat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Magnetic interference

Be aware: neodymium magnets generate a field that disrupts sensitive sensors. Keep a separation from your phone, tablet, and GPS.

Hand protection

Mind your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

ICD Warning

Patients with a heart stimulator should keep an large gap from magnets. The magnetism can interfere with the operation of the life-saving device.

Respect the power

Exercise caution. Neodymium magnets attract from a long distance and connect with massive power, often faster than you can move away.

Dust explosion hazard

Fire hazard: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Swallowing risk

Strictly store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are fatal.

Risk of cracking

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

Security! Details about risks in the article: Magnet Safety Guide.