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MW 12.5x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010014

GTIN/EAN: 5906301810131

5.00

Diameter Ø

12.5 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

1.84 g

Magnetization Direction

↑ axial

Load capacity

1.42 kg / 13.89 N

Magnetic Induction

188.88 mT / 1889 Gs

Coating

[NiCuNi] Nickel

0.935 with VAT / pcs + price for transport

0.760 ZŁ net + 23% VAT / pcs

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Physical properties - MW 12.5x2 / N38 - cylindrical magnet

Specification / characteristics - MW 12.5x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010014
GTIN/EAN 5906301810131
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 12.5 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 1.84 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.42 kg / 13.89 N
Magnetic Induction ~ ? 188.88 mT / 1889 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12.5x2 / 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 data constitute the result of a mathematical calculation. Results rely on algorithms for the material Nd2Fe14B. Actual performance may deviate from the simulation results. Treat these data as a reference point when designing systems.

Table 1: Static force (force vs distance) - power drop
MW 12.5x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1888 Gs
188.8 mT
1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
low risk
1 mm 1703 Gs
170.3 mT
1.16 kg / 2.55 LBS
1155.6 g / 11.3 N
low risk
2 mm 1453 Gs
145.3 mT
0.84 kg / 1.85 LBS
840.3 g / 8.2 N
low risk
3 mm 1190 Gs
119.0 mT
0.56 kg / 1.24 LBS
564.1 g / 5.5 N
low risk
5 mm 752 Gs
75.2 mT
0.23 kg / 0.50 LBS
225.0 g / 2.2 N
low risk
10 mm 241 Gs
24.1 mT
0.02 kg / 0.05 LBS
23.2 g / 0.2 N
low risk
15 mm 96 Gs
9.6 mT
0.00 kg / 0.01 LBS
3.7 g / 0.0 N
low risk
20 mm 46 Gs
4.6 mT
0.00 kg / 0.00 LBS
0.9 g / 0.0 N
low risk
30 mm 15 Gs
1.5 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: Slippage capacity (vertical surface)
MW 12.5x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.28 kg / 0.63 LBS
284.0 g / 2.8 N
1 mm Stal (~0.2) 0.23 kg / 0.51 LBS
232.0 g / 2.3 N
2 mm Stal (~0.2) 0.17 kg / 0.37 LBS
168.0 g / 1.6 N
3 mm Stal (~0.2) 0.11 kg / 0.25 LBS
112.0 g / 1.1 N
5 mm Stal (~0.2) 0.05 kg / 0.10 LBS
46.0 g / 0.5 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) - vertical pull
MW 12.5x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.43 kg / 0.94 LBS
426.0 g / 4.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.28 kg / 0.63 LBS
284.0 g / 2.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.14 kg / 0.31 LBS
142.0 g / 1.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.71 kg / 1.57 LBS
710.0 g / 7.0 N

Table 4: Steel thickness (saturation) - power losses
MW 12.5x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.14 kg / 0.31 LBS
142.0 g / 1.4 N
1 mm
25%
0.36 kg / 0.78 LBS
355.0 g / 3.5 N
2 mm
50%
0.71 kg / 1.57 LBS
710.0 g / 7.0 N
3 mm
75%
1.07 kg / 2.35 LBS
1065.0 g / 10.4 N
5 mm
100%
1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
10 mm
100%
1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
11 mm
100%
1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
12 mm
100%
1.42 kg / 3.13 LBS
1420.0 g / 13.9 N

Table 5: Thermal stability (stability) - power drop
MW 12.5x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.42 kg / 3.13 LBS
1420.0 g / 13.9 N
OK
40 °C -2.2% 1.39 kg / 3.06 LBS
1388.8 g / 13.6 N
OK
60 °C -4.4% 1.36 kg / 2.99 LBS
1357.5 g / 13.3 N
80 °C -6.6% 1.33 kg / 2.92 LBS
1326.3 g / 13.0 N
100 °C -28.8% 1.01 kg / 2.23 LBS
1011.0 g / 9.9 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 12.5x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.70 kg / 5.95 LBS
3 338 Gs
0.40 kg / 0.89 LBS
405 g / 4.0 N
N/A
1 mm 2.47 kg / 5.45 LBS
3 616 Gs
0.37 kg / 0.82 LBS
371 g / 3.6 N
2.23 kg / 4.91 LBS
~0 Gs
2 mm 2.20 kg / 4.84 LBS
3 407 Gs
0.33 kg / 0.73 LBS
329 g / 3.2 N
1.98 kg / 4.36 LBS
~0 Gs
3 mm 1.89 kg / 4.18 LBS
3 165 Gs
0.28 kg / 0.63 LBS
284 g / 2.8 N
1.71 kg / 3.76 LBS
~0 Gs
5 mm 1.32 kg / 2.91 LBS
2 640 Gs
0.20 kg / 0.44 LBS
198 g / 1.9 N
1.19 kg / 2.62 LBS
~0 Gs
10 mm 0.43 kg / 0.94 LBS
1 503 Gs
0.06 kg / 0.14 LBS
64 g / 0.6 N
0.38 kg / 0.85 LBS
~0 Gs
20 mm 0.04 kg / 0.10 LBS
483 Gs
0.01 kg / 0.01 LBS
7 g / 0.1 N
0.04 kg / 0.09 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
51 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
31 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
20 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
14 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
10 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
7 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Protective zones (electronics) - warnings
MW 12.5x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Timepiece 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 cm
Car key 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Impact energy (kinetic energy) - collision effects
MW 12.5x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 28.30 km/h
(7.86 m/s)
0.06 J
30 mm 48.53 km/h
(13.48 m/s)
0.17 J
50 mm 62.65 km/h
(17.40 m/s)
0.28 J
100 mm 88.60 km/h
(24.61 m/s)
0.56 J

Table 9: Surface protection spec
MW 12.5x2 / 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: Construction data (Flux)
MW 12.5x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 810 Mx 28.1 µWb
Pc Coefficient 0.24 Low (Flat)

Table 11: Submerged application
MW 12.5x2 / N38

Environment Effective steel pull Effect
Air (land) 1.42 kg Standard
Water (riverbed) 1.63 kg
(+0.21 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Vertical hold

*Note: On a vertical surface, the magnet holds just a fraction of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) significantly reduces the holding force.

3. Power loss vs temp

*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) = 0.24

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%
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: 010014-2026
Measurement Calculator
Magnet pull force

Field Strength

Check out also proposals

This product is an extremely powerful rod magnet, produced from modern NdFeB material, which, with dimensions of Ø12.5x2 mm, guarantees maximum efficiency. This specific item is characterized by an accuracy of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 1.42 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 13.89 N with a weight of only 1.84 g, this rod is indispensable in electronics 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 long-term durability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø12.5x2), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 12.5 mm and height 2 mm. The value of 13.89 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.84 g. The product has a [NiCuNi] coating, which secures it 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 12.5 mm. Such an arrangement is standard 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.

Pros and cons of neodymium magnets.

Pros

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • Their power is maintained, and after around 10 years it decreases only by ~1% (according to research),
  • They show high resistance to demagnetization induced by external disturbances,
  • A magnet with a smooth silver surface has better aesthetics,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures approaching 230°C and above...
  • Possibility of custom machining as well as optimizing to specific conditions,
  • Versatile presence in innovative solutions – they are commonly used in data components, brushless drives, diagnostic systems, as well as complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

What to avoid - cons of neodymium magnets and ways of using them
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • We suggest casing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complicated shapes.
  • Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these magnets can complicate diagnosis medical when they are in the body.
  • Due to expensive raw materials, their price exceeds standard values,

Lifting parameters

Maximum holding power of the magnet – what affects it?

The load parameter shown refers to the limit force, recorded under optimal environment, meaning:
  • on a plate made of mild steel, perfectly concentrating the magnetic field
  • with a thickness of at least 10 mm
  • characterized by smoothness
  • under conditions of gap-free contact (surface-to-surface)
  • under axial application of breakaway force (90-degree angle)
  • at standard ambient temperature

Key elements affecting lifting force

Effective lifting capacity is influenced by working environment parameters, including (from most important):
  • Gap between magnet and steel – every millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Load vector – maximum parameter is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Material composition – not every steel attracts identically. High carbon content weaken the attraction effect.
  • Base smoothness – the more even the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Temperature – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Safety rules for work with NdFeB magnets
Phone sensors

GPS units and smartphones are highly susceptible to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Permanent damage

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

Life threat

Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Material brittleness

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Impact of two magnets will cause them shattering into shards.

Crushing risk

Risk of injury: The pulling power is so great that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.

Safe distance

Do not bring magnets close to a wallet, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.

Fire risk

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

Nickel allergy

Studies show that nickel (standard magnet coating) is a common allergen. If you have an allergy, avoid direct skin contact or choose versions in plastic housing.

Conscious usage

Handle magnets with awareness. Their powerful strength can shock even experienced users. Be vigilant and do not underestimate their force.

Product not for children

Always keep magnets away from children. Choking hazard is high, and the consequences of magnets connecting inside the body are life-threatening.

Important! 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