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MW 25x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010050

GTIN/EAN: 5906301810490

5.00

Diameter Ø

25 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

22.09 g

Magnetization Direction

↑ axial

Load capacity

10.27 kg / 100.71 N

Magnetic Induction

268.21 mT / 2682 Gs

Coating

[NiCuNi] Nickel

7.40 with VAT / pcs + price for transport

6.02 ZŁ net + 23% VAT / pcs

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Product card - MW 25x6 / N38 - cylindrical magnet

Specification / characteristics - MW 25x6 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010050
GTIN/EAN 5906301810490
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 25 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 22.09 g
Magnetization Direction ↑ axial
Load capacity ~ ? 10.27 kg / 100.71 N
Magnetic Induction ~ ? 268.21 mT / 2682 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 25x6 / 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 analysis of the product - technical parameters

These data are the result of a physical simulation. Values were calculated on models for the class Nd2Fe14B. Real-world parameters may differ. Use these data as a reference point during assembly planning.

Table 1: Static force (pull vs distance) - characteristics
MW 25x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2682 Gs
268.2 mT
10.27 kg / 22.64 pounds
10270.0 g / 100.7 N
critical level
1 mm 2535 Gs
253.5 mT
9.18 kg / 20.23 pounds
9177.2 g / 90.0 N
medium risk
2 mm 2363 Gs
236.3 mT
7.97 kg / 17.57 pounds
7971.8 g / 78.2 N
medium risk
3 mm 2176 Gs
217.6 mT
6.76 kg / 14.91 pounds
6761.0 g / 66.3 N
medium risk
5 mm 1793 Gs
179.3 mT
4.59 kg / 10.13 pounds
4592.7 g / 45.1 N
medium risk
10 mm 1013 Gs
101.3 mT
1.46 kg / 3.23 pounds
1464.5 g / 14.4 N
safe
15 mm 565 Gs
56.5 mT
0.46 kg / 1.00 pounds
455.3 g / 4.5 N
safe
20 mm 330 Gs
33.0 mT
0.16 kg / 0.34 pounds
155.7 g / 1.5 N
safe
30 mm 134 Gs
13.4 mT
0.03 kg / 0.06 pounds
25.6 g / 0.3 N
safe
50 mm 36 Gs
3.6 mT
0.00 kg / 0.00 pounds
1.9 g / 0.0 N
safe

Table 2: Slippage load (vertical surface)
MW 25x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 2.05 kg / 4.53 pounds
2054.0 g / 20.1 N
1 mm Stal (~0.2) 1.84 kg / 4.05 pounds
1836.0 g / 18.0 N
2 mm Stal (~0.2) 1.59 kg / 3.51 pounds
1594.0 g / 15.6 N
3 mm Stal (~0.2) 1.35 kg / 2.98 pounds
1352.0 g / 13.3 N
5 mm Stal (~0.2) 0.92 kg / 2.02 pounds
918.0 g / 9.0 N
10 mm Stal (~0.2) 0.29 kg / 0.64 pounds
292.0 g / 2.9 N
15 mm Stal (~0.2) 0.09 kg / 0.20 pounds
92.0 g / 0.9 N
20 mm Stal (~0.2) 0.03 kg / 0.07 pounds
32.0 g / 0.3 N
30 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Vertical assembly (shearing) - vertical pull
MW 25x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
3.08 kg / 6.79 pounds
3081.0 g / 30.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
2.05 kg / 4.53 pounds
2054.0 g / 20.1 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.03 kg / 2.26 pounds
1027.0 g / 10.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
5.14 kg / 11.32 pounds
5135.0 g / 50.4 N

Table 4: Material efficiency (saturation) - power losses
MW 25x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.51 kg / 1.13 pounds
513.5 g / 5.0 N
1 mm
13%
1.28 kg / 2.83 pounds
1283.8 g / 12.6 N
2 mm
25%
2.57 kg / 5.66 pounds
2567.5 g / 25.2 N
3 mm
38%
3.85 kg / 8.49 pounds
3851.3 g / 37.8 N
5 mm
63%
6.42 kg / 14.15 pounds
6418.7 g / 63.0 N
10 mm
100%
10.27 kg / 22.64 pounds
10270.0 g / 100.7 N
11 mm
100%
10.27 kg / 22.64 pounds
10270.0 g / 100.7 N
12 mm
100%
10.27 kg / 22.64 pounds
10270.0 g / 100.7 N

Table 5: Thermal stability (stability) - power drop
MW 25x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 10.27 kg / 22.64 pounds
10270.0 g / 100.7 N
OK
40 °C -2.2% 10.04 kg / 22.14 pounds
10044.1 g / 98.5 N
OK
60 °C -4.4% 9.82 kg / 21.65 pounds
9818.1 g / 96.3 N
80 °C -6.6% 9.59 kg / 21.15 pounds
9592.2 g / 94.1 N
100 °C -28.8% 7.31 kg / 16.12 pounds
7312.2 g / 71.7 N

Table 6: Two magnets (repulsion) - field range
MW 25x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 21.76 kg / 47.98 pounds
4 291 Gs
3.26 kg / 7.20 pounds
3264 g / 32.0 N
N/A
1 mm 20.66 kg / 45.54 pounds
5 225 Gs
3.10 kg / 6.83 pounds
3098 g / 30.4 N
18.59 kg / 40.98 pounds
~0 Gs
2 mm 19.45 kg / 42.87 pounds
5 070 Gs
2.92 kg / 6.43 pounds
2917 g / 28.6 N
17.50 kg / 38.58 pounds
~0 Gs
3 mm 18.18 kg / 40.09 pounds
4 902 Gs
2.73 kg / 6.01 pounds
2727 g / 26.8 N
16.36 kg / 36.08 pounds
~0 Gs
5 mm 15.60 kg / 34.39 pounds
4 541 Gs
2.34 kg / 5.16 pounds
2340 g / 23.0 N
14.04 kg / 30.95 pounds
~0 Gs
10 mm 9.73 kg / 21.46 pounds
3 587 Gs
1.46 kg / 3.22 pounds
1460 g / 14.3 N
8.76 kg / 19.31 pounds
~0 Gs
20 mm 3.10 kg / 6.84 pounds
2 025 Gs
0.47 kg / 1.03 pounds
465 g / 4.6 N
2.79 kg / 6.16 pounds
~0 Gs
50 mm 0.13 kg / 0.28 pounds
409 Gs
0.02 kg / 0.04 pounds
19 g / 0.2 N
0.11 kg / 0.25 pounds
~0 Gs
60 mm 0.05 kg / 0.12 pounds
268 Gs
0.01 kg / 0.02 pounds
8 g / 0.1 N
0.05 kg / 0.11 pounds
~0 Gs
70 mm 0.03 kg / 0.06 pounds
183 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
0.02 kg / 0.05 pounds
~0 Gs
80 mm 0.01 kg / 0.03 pounds
131 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
0.01 kg / 0.03 pounds
~0 Gs
90 mm 0.01 kg / 0.02 pounds
96 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.01 pounds
72 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (implants) - warnings
MW 25x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 10.5 cm
Hearing aid 10 Gs (1.0 mT) 8.0 cm
Mechanical watch 20 Gs (2.0 mT) 6.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 5.0 cm
Remote 50 Gs (5.0 mT) 4.5 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm

Table 8: Collisions (kinetic energy) - collision effects
MW 25x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 23.60 km/h
(6.56 m/s)
0.47 J
30 mm 37.72 km/h
(10.48 m/s)
1.21 J
50 mm 48.63 km/h
(13.51 m/s)
2.02 J
100 mm 68.77 km/h
(19.10 m/s)
4.03 J

Table 9: Coating parameters (durability)
MW 25x6 / 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 25x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 14 740 Mx 147.4 µWb
Pc Coefficient 0.34 Low (Flat)

Table 11: Submerged application
MW 25x6 / N38

Environment Effective steel pull Effect
Air (land) 10.27 kg Standard
Water (riverbed) 11.76 kg
(+1.49 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. Sliding resistance

*Note: On a vertical wall, the magnet holds only approx. 20-30% of its nominal pull.

2. Steel saturation

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

3. Heat tolerance

*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) = 0.34

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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
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%
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: 010050-2026
Quick Unit Converter
Force (pull)

Magnetic Field

Check out also products

The offered product is an incredibly powerful cylindrical magnet, composed of modern NdFeB material, which, at dimensions of Ø25x6 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 10.27 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 100.71 N with a weight of only 22.09 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are suitable for the majority of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø25x6), 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 25 mm and height 6 mm. The value of 100.71 N means that the magnet is capable of holding a weight many times exceeding its own mass of 22.09 g. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 6 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 and weaknesses of neodymium magnets.

Strengths

Besides their durability, neodymium magnets are valued for these benefits:
  • They retain magnetic properties for around ten years – the loss is just ~1% (according to analyses),
  • Magnets perfectly defend themselves against loss of magnetization caused by ambient magnetic noise,
  • By applying a reflective layer of silver, the element acquires an elegant look,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
  • Possibility of individual creating and adapting to precise requirements,
  • Versatile presence in electronics industry – they are used in magnetic memories, electromotive mechanisms, medical equipment, and other advanced devices.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Limited possibility of making nuts in the magnet and complicated forms - recommended is casing - mounting mechanism.
  • Possible danger to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small components of these devices can complicate diagnosis medical in case of swallowing.
  • With mass production the cost of neodymium magnets can be a barrier,

Pull force analysis

Best holding force of the magnet in ideal parameterswhat it depends on?

The load parameter shown refers to the peak performance, measured under optimal environment, specifically:
  • on a base made of mild steel, optimally conducting the magnetic flux
  • with a thickness no less than 10 mm
  • with an ground touching surface
  • under conditions of ideal adhesion (surface-to-surface)
  • for force applied at a right angle (in the magnet axis)
  • at temperature room level

Magnet lifting force in use – key factors

In practice, the real power is determined by several key aspects, ranked from the most important:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of maximum force).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Metal type – not every steel attracts identically. Alloy additives worsen the attraction effect.
  • Surface condition – ground elements ensure maximum contact, which increases force. Uneven metal reduce efficiency.
  • Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate reduces the load capacity.

Precautions when working with neodymium magnets
Magnets are brittle

NdFeB magnets are sintered ceramics, which means they are very brittle. Impact of two magnets will cause them cracking into small pieces.

Keep away from computers

Avoid bringing magnets close to a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Crushing force

Danger of trauma: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Nickel coating and allergies

It is widely known that nickel (the usual finish) is a potent allergen. If you have an allergy, refrain from touching magnets with bare hands or select encased magnets.

Danger to pacemakers

Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Keep away from electronics

Navigation devices and mobile phones are highly susceptible to magnetic fields. Close proximity with a strong magnet can ruin the internal compass in your phone.

Choking Hazard

Product intended for adults. Small elements can be swallowed, causing severe trauma. Store out of reach of children and animals.

Heat warning

Keep cool. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, inquire about HT versions (H, SH, UH).

Combustion hazard

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

Powerful field

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

Security! Looking for details? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98