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MW 12x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010442

GTIN/EAN: 5906301811114

5.00
Load capacity 0.87 kg / 8.51 N Magnetic Induction 150.32 mT / 1503 Gs
Diameter Ø
12 mm [±0,1 mm]
Height
1.5 mm [±0,1 mm]
Weight
1.27 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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price from 1 pcs
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price from 1800 pcs
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price from 7200 pcs
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Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical data of the product - MW 12x1.5 / N38 - cylindrical magnet

Specification / characteristics - MW 12x1.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010442
GTIN/EAN 5906301811114
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 mm [±0,1 mm]
Height 1.5 mm [±0,1 mm]
Weight 1.27 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.87 kg / 8.51 N
Magnetic Induction ~ ? 150.32 mT / 1503 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x1.5 / N38 - cylindrical magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 simulation of the magnet - technical parameters

These values represent the result of a physical simulation. Values were calculated on models for the class Nd2Fe14B. Actual conditions may differ. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
MW 12x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1503 Gs
150.3 mT
0.87 kg / 1.92 pounds
870.0 g / 8.5 N
safe
1 mm 1365 Gs
136.5 mT
0.72 kg / 1.58 pounds
718.1 g / 7.0 N
safe
2 mm 1163 Gs
116.3 mT
0.52 kg / 1.15 pounds
521.4 g / 5.1 N
safe
3 mm 947 Gs
94.7 mT
0.35 kg / 0.76 pounds
345.7 g / 3.4 N
safe
5 mm 587 Gs
58.7 mT
0.13 kg / 0.29 pounds
132.6 g / 1.3 N
safe
10 mm 180 Gs
18.0 mT
0.01 kg / 0.03 pounds
12.5 g / 0.1 N
safe
15 mm 70 Gs
7.0 mT
0.00 kg / 0.00 pounds
1.9 g / 0.0 N
safe
20 mm 33 Gs
3.3 mT
0.00 kg / 0.00 pounds
0.4 g / 0.0 N
safe
30 mm 11 Gs
1.1 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe

Table 2: Slippage force (wall)
MW 12x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.17 kg / 0.38 pounds
174.0 g / 1.7 N
1 mm Stal (~0.2) 0.14 kg / 0.32 pounds
144.0 g / 1.4 N
2 mm Stal (~0.2) 0.10 kg / 0.23 pounds
104.0 g / 1.0 N
3 mm Stal (~0.2) 0.07 kg / 0.15 pounds
70.0 g / 0.7 N
5 mm Stal (~0.2) 0.03 kg / 0.06 pounds
26.0 g / 0.3 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 12x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.26 kg / 0.58 pounds
261.0 g / 2.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.17 kg / 0.38 pounds
174.0 g / 1.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.09 kg / 0.19 pounds
87.0 g / 0.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.44 kg / 0.96 pounds
435.0 g / 4.3 N

Table 4: Material efficiency (saturation) - power losses
MW 12x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.09 kg / 0.19 pounds
87.0 g / 0.9 N
1 mm
25%
0.22 kg / 0.48 pounds
217.5 g / 2.1 N
2 mm
50%
0.44 kg / 0.96 pounds
435.0 g / 4.3 N
3 mm
75%
0.65 kg / 1.44 pounds
652.5 g / 6.4 N
5 mm
100%
0.87 kg / 1.92 pounds
870.0 g / 8.5 N
10 mm
100%
0.87 kg / 1.92 pounds
870.0 g / 8.5 N
11 mm
100%
0.87 kg / 1.92 pounds
870.0 g / 8.5 N
12 mm
100%
0.87 kg / 1.92 pounds
870.0 g / 8.5 N

Table 5: Working in heat (material behavior) - resistance threshold
MW 12x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.87 kg / 1.92 pounds
870.0 g / 8.5 N
OK
40 °C -2.2% 0.85 kg / 1.88 pounds
850.9 g / 8.3 N
OK
60 °C -4.4% 0.83 kg / 1.83 pounds
831.7 g / 8.2 N
80 °C -6.6% 0.81 kg / 1.79 pounds
812.6 g / 8.0 N
100 °C -28.8% 0.62 kg / 1.37 pounds
619.4 g / 6.1 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 12x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.57 kg / 3.47 pounds
2 770 Gs
0.24 kg / 0.52 pounds
236 g / 2.3 N
N/A
1 mm 1.46 kg / 3.21 pounds
2 891 Gs
0.22 kg / 0.48 pounds
219 g / 2.1 N
1.31 kg / 2.89 pounds
~0 Gs
2 mm 1.30 kg / 2.87 pounds
2 731 Gs
0.19 kg / 0.43 pounds
195 g / 1.9 N
1.17 kg / 2.58 pounds
~0 Gs
3 mm 1.12 kg / 2.48 pounds
2 538 Gs
0.17 kg / 0.37 pounds
168 g / 1.7 N
1.01 kg / 2.23 pounds
~0 Gs
5 mm 0.78 kg / 1.71 pounds
2 109 Gs
0.12 kg / 0.26 pounds
116 g / 1.1 N
0.70 kg / 1.54 pounds
~0 Gs
10 mm 0.24 kg / 0.53 pounds
1 173 Gs
0.04 kg / 0.08 pounds
36 g / 0.4 N
0.22 kg / 0.48 pounds
~0 Gs
20 mm 0.02 kg / 0.05 pounds
361 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
0.02 kg / 0.05 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
36 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
22 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
14 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
10 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
7 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
5 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MW 12x1.5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.0 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Timepiece 20 Gs (2.0 mT) 2.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.0 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) 0.5 cm

Table 8: Impact energy (cracking risk) - collision effects
MW 12x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.59 km/h
(6.27 m/s)
0.02 J
30 mm 22.74 km/h
(6.32 m/s)
0.03 J
50 mm 22.74 km/h
(6.32 m/s)
0.03 J
100 mm 22.74 km/h
(6.32 m/s)
0.03 J

Table 9: Surface protection spec
MW 12x1.5 / 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 12x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 159 Mx 21.6 µWb
Pc Coefficient 0.19 Low (Flat)

Table 11: Submerged application
MW 12x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.87 kg Standard
Water (riverbed) 1.00 kg
(+0.13 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. Sliding resistance

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

2. Efficiency vs thickness

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

3. Heat tolerance

*For N38 grade, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.19

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

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: 010442-2026
Measurement Calculator

Magnet pull force


Magnetic Induction

Other proposals

This product is a very strong cylinder magnet, manufactured from advanced NdFeB material, which, at dimensions of Ø12x1.5 mm, guarantees optimal power. The MW 12x1.5 / N38 model is characterized by a tolerance of ±0.1mm and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 0.87 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard 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 pull force of 8.51 N with a weight of only 1.27 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 12.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for the majority of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø12x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 1.5 mm. The key parameter here is the holding force amounting to approximately 0.87 kg (force ~8.51 N), which, with such compact dimensions, proves the high power of the NdFeB material. 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 mm. 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 through the diameter if your project requires it.

Advantages and disadvantages of Nd2Fe14B magnets.

Strengths

Apart from their strong holding force, neodymium magnets have these key benefits:
  • They retain full power for nearly 10 years – the drop is just ~1% (based on simulations),
  • They are extremely resistant to demagnetization induced by external disturbances,
  • In other words, due to the shiny layer of nickel, the element is aesthetically pleasing,
  • Magnetic induction on the surface of the magnet is maximum,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to freedom in designing and the capacity to modify to unusual requirements,
  • Fundamental importance in electronics industry – they find application in computer drives, electric drive systems, medical equipment, and technologically advanced constructions.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • Neodymium magnets lose 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 durability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Limited ability of producing nuts in the magnet and complicated forms - recommended is cover - magnetic holder.
  • Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these devices can be problematic in diagnostics medical in case of swallowing.
  • With mass production the cost of neodymium magnets can be a barrier,

Pull force analysis

Detachment force of the magnet in optimal conditionswhat contributes to it?

Holding force of 0.87 kg is a result of laboratory testing executed under standard conditions:
  • on a plate made of structural steel, effectively closing the magnetic flux
  • with a cross-section minimum 10 mm
  • with a plane free of scratches
  • with total lack of distance (without coatings)
  • under vertical application of breakaway force (90-degree angle)
  • in stable room temperature

Determinants of practical lifting force of a magnet

Effective lifting capacity impacted by working environment parameters, such as (from most important):
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Steel grade – ideal substrate is pure iron steel. Hardened steels may attract less.
  • Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal environment – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity was determined with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet and the plate reduces the load capacity.

Warnings
Finger safety

Risk of injury: The attraction force is so great that it can result in hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Medical implants

Life threat: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Fire warning

Machining of neodymium magnets carries a risk of fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Impact on smartphones

An intense magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Keep magnets near a device to prevent breaking the sensors.

Keep away from computers

Device Safety: Neodymium magnets can ruin payment cards and delicate electronics (heart implants, hearing aids, timepieces).

Maximum temperature

Do not overheat. Neodymium magnets are susceptible to heat. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Immense force

Be careful. Rare earth magnets attract from a long distance and snap with massive power, often quicker than you can react.

Avoid contact if allergic

Studies show that nickel (standard magnet coating) is a strong allergen. For allergy sufferers, avoid direct skin contact and opt for encased magnets.

Magnets are brittle

Neodymium magnets are ceramic materials, which means they are prone to chipping. Clashing of two magnets will cause them breaking into shards.

Product not for children

Only for adults. Small elements pose a choking risk, causing severe trauma. Store out of reach of kids and pets.

Important! Need more info? Check our post: Are neodymium magnets dangerous?