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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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Technical specification - 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

Engineering analysis of the assembly - data

Presented data represent the outcome of a physical simulation. Values are based on models for the material Nd2Fe14B. Real-world conditions may differ. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (pull 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
safe
1 mm 1703 Gs
170.3 mT
1.16 kg / 2.55 lbs
1155.6 g / 11.3 N
safe
2 mm 1453 Gs
145.3 mT
0.84 kg / 1.85 lbs
840.3 g / 8.2 N
safe
3 mm 1190 Gs
119.0 mT
0.56 kg / 1.24 lbs
564.1 g / 5.5 N
safe
5 mm 752 Gs
75.2 mT
0.23 kg / 0.50 lbs
225.0 g / 2.2 N
safe
10 mm 241 Gs
24.1 mT
0.02 kg / 0.05 lbs
23.2 g / 0.2 N
safe
15 mm 96 Gs
9.6 mT
0.00 kg / 0.01 lbs
3.7 g / 0.0 N
safe
20 mm 46 Gs
4.6 mT
0.00 kg / 0.00 lbs
0.9 g / 0.0 N
safe
30 mm 15 Gs
1.5 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 capacity (wall)
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 (shearing) - behavior on slippery surfaces
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: Material efficiency (substrate influence) - sheet metal selection
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 resistance (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 (repulsion) - field range
MW 12.5x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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: Safety (HSE) (implants) - precautionary measures
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
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) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Collisions (cracking risk) - warning
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: Anti-corrosion coating durability
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: Hydrostatics and buoyancy
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%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

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

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) drastically weakens 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) = 0.24

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.

Technical and environmental data
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: 010014-2026
Measurement Calculator
Magnet pull force

Magnetic Field

Other offers

The presented product is a very strong cylinder magnet, composed of advanced NdFeB material, which, at dimensions of Ø12.5x2 mm, guarantees optimal power. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 1.42 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 13.89 N with a weight of only 1.84 g, this rod is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 12.5.1 mm) using epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets N38 are strong enough for 90% of applications in automation and machine building, where extreme miniaturization with maximum force is not required. 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.
This model is characterized by dimensions Ø12.5x2 mm, which, at a weight of 1.84 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 1.42 kg (force ~13.89 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, 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. 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.

Pros as well as cons of neodymium magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:
  • They have constant strength, and over around 10 years their performance decreases symbolically – ~1% (in testing),
  • They show high resistance to demagnetization induced by presence of other magnetic fields,
  • Thanks to the glossy finish, the plating of nickel, gold-plated, or silver-plated gives an aesthetic appearance,
  • Magnetic induction on the working layer of the magnet turns out to be maximum,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to flexibility in shaping and the ability to customize to individual projects,
  • Versatile presence in advanced technology sectors – they are used in magnetic memories, electromotive mechanisms, medical equipment, and other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in compact constructions

Limitations

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • We recommend a housing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated forms.
  • Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. Additionally, tiny parts of these products can disrupt the diagnostic process medical when they are in the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Lifting parameters

Magnetic strength at its maximum – what affects it?

The specified lifting capacity concerns the maximum value, obtained under ideal test conditions, meaning:
  • with the application of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • whose transverse dimension is min. 10 mm
  • characterized by smoothness
  • under conditions of no distance (surface-to-surface)
  • for force applied at a right angle (in the magnet axis)
  • at temperature room level

Determinants of practical lifting force of a magnet

Real force impacted by working environment parameters, mainly (from most important):
  • Distance – the presence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Metal type – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
  • Surface structure – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a small distance between the magnet and the plate lowers the lifting capacity.

Safety rules for work with NdFeB magnets
Fragile material

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Wear goggles.

Life threat

Patients with a ICD should keep an safe separation from magnets. The magnetic field can stop the operation of the life-saving device.

Allergic reactions

Certain individuals suffer from a contact allergy to Ni, which is the standard coating for neodymium magnets. Extended handling can result in a rash. We recommend wear safety gloves.

Compass and GPS

Navigation devices and smartphones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Conscious usage

Before use, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

No play value

Adult use only. Small elements can be swallowed, causing severe trauma. Store away from kids and pets.

Pinching danger

Mind your fingers. Two large magnets will join instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!

Keep away from computers

Do not bring magnets close to a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Dust explosion hazard

Drilling and cutting of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Maximum temperature

Watch the temperature. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.

Important! Learn more about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98