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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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Technical of the product - 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 modeling of the magnet - report

Presented values represent the direct effect of a physical calculation. Values are based on algorithms for the class Nd2Fe14B. Actual parameters might slightly deviate from the simulation results. Treat these data as a reference point for designers.

Table 1: Static force (pull vs gap) - power drop
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
crushing
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
weak grip
15 mm 565 Gs
56.5 mT
0.46 kg / 1.00 pounds
455.3 g / 4.5 N
weak grip
20 mm 330 Gs
33.0 mT
0.16 kg / 0.34 pounds
155.7 g / 1.5 N
weak grip
30 mm 134 Gs
13.4 mT
0.03 kg / 0.06 pounds
25.6 g / 0.3 N
weak grip
50 mm 36 Gs
3.6 mT
0.00 kg / 0.00 pounds
1.9 g / 0.0 N
weak grip

Table 2: Shear 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: Wall mounting (sliding) - 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) - sheet metal selection
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 (material behavior) - 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: Magnet-Magnet interaction (attraction) - field range
MW 25x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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
Timepiece 20 Gs (2.0 mT) 6.5 cm
Mobile device 40 Gs (4.0 mT) 5.0 cm
Car key 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: Impact energy (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: Surface protection spec
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. Vertical hold

*Caution: On a vertical wall, the magnet holds only ~20% of its nominal pull.

2. Efficiency vs thickness

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

3. Thermal stability

*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%
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: 010050-2026
Measurement Calculator
Force (pull)

Field Strength

Check out also proposals

The offered product is an exceptionally strong cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø25x6 mm, guarantees the highest energy density. This specific item is characterized by 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 available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. 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 brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. 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 oxidation, 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. 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 diametrically if your project requires it.

Strengths and weaknesses of neodymium magnets.

Benefits

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • They have unchanged lifting capacity, and over more than 10 years their performance decreases symbolically – ~1% (according to theory),
  • They possess excellent resistance to magnetism drop when exposed to external magnetic sources,
  • In other words, due to the shiny layer of nickel, the element gains visual value,
  • Neodymium magnets generate maximum magnetic induction on a contact point, which increases force concentration,
  • 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 forming and the capacity to customize to complex applications,
  • Significant place in innovative solutions – they are used in computer drives, electric motors, diagnostic systems, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in small systems

Disadvantages

Cons of neodymium magnets: weaknesses and usage proposals
  • At very strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as 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 - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of producing nuts in the magnet and complex shapes - preferred is casing - mounting mechanism.
  • Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small elements of these products are able to disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Optimal lifting capacity of a neodymium magnetwhat contributes to it?

The declared magnet strength concerns the peak performance, obtained under optimal environment, namely:
  • using a base made of mild steel, serving as a circuit closing element
  • with a thickness of at least 10 mm
  • characterized by lack of roughness
  • with total lack of distance (without paint)
  • for force applied at a right angle (in the magnet axis)
  • at room temperature

Lifting capacity in practice – influencing factors

Please note that the working load may be lower subject to the following factors, starting with the most relevant:
  • Distance (betwixt the magnet and the metal), because even a very small distance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Direction of force – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Material type – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Thermal environment – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Safe handling of NdFeB magnets
Pinching danger

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

Sensitization to coating

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If skin irritation occurs, cease working with magnets and wear gloves.

Keep away from children

Absolutely keep magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are tragic.

Warning for heart patients

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

Do not drill into magnets

Dust created during grinding of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Heat warning

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.

Do not underestimate power

Exercise caution. Rare earth magnets attract from a distance and snap with huge force, often quicker than you can move away.

Eye protection

Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Threat to navigation

A strong magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Do not bring magnets close to a device to avoid damaging the sensors.

Electronic devices

Intense magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Caution! Learn more about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98