MW 25x6 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010050
GTIN/EAN: 5906301810490
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 ZŁ with VAT / pcs + price for transport
6.02 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us now
+48 888 99 98 98
alternatively send us a note through
form
the contact page.
Force and form of magnetic components can be reviewed on our
online calculation tool.
Same-day shipping for orders placed before 14:00.
Product card - MW 25x6 / N38 - cylindrical magnet
Specification / characteristics - MW 25x6 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010050 |
| GTIN/EAN | 5906301810490 |
| Production/Distribution | Dhit sp. z o.o. |
| 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
| 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
| 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 |
|
0.51 kg / 1.13 pounds
513.5 g / 5.0 N
|
| 1 mm |
|
1.28 kg / 2.83 pounds
1283.8 g / 12.6 N
|
| 2 mm |
|
2.57 kg / 5.66 pounds
2567.5 g / 25.2 N
|
| 3 mm |
|
3.85 kg / 8.49 pounds
3851.3 g / 37.8 N
|
| 5 mm |
|
6.42 kg / 14.15 pounds
6418.7 g / 63.0 N
|
| 10 mm |
|
10.27 kg / 22.64 pounds
10270.0 g / 100.7 N
|
| 11 mm |
|
10.27 kg / 22.64 pounds
10270.0 g / 100.7 N
|
| 12 mm |
|
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% |
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.
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 |
Check out also products
Strengths and weaknesses of neodymium magnets.
Strengths
- 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
- 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 parameters – what it depends on?
- 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
- 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.
