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MW 12x1 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010015

GTIN/EAN: 5906301810148

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

1 mm [±0,1 mm]

Weight

0.85 g

Magnetization Direction

↑ axial

Load capacity

0.42 kg / 4.15 N

Magnetic Induction

101.90 mT / 1019 Gs

Coating

[NiCuNi] Nickel

0.578 with VAT / pcs + price for transport

0.470 ZŁ net + 23% VAT / pcs

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Physical properties - MW 12x1 / N38 - cylindrical magnet

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

properties
properties values
Cat. no. 010015
GTIN/EAN 5906301810148
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 mm [±0,1 mm]
Weight 0.85 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.42 kg / 4.15 N
Magnetic Induction ~ ? 101.90 mT / 1019 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x1 / 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 product - data

These values constitute the direct effect of a physical calculation. Values were calculated on algorithms for the class Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Treat these calculations as a reference point during assembly planning.

Table 1: Static pull force (force vs gap) - characteristics
MW 12x1 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1019 Gs
101.9 mT
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
safe
1 mm 941 Gs
94.1 mT
0.36 kg / 0.79 LBS
358.5 g / 3.5 N
safe
2 mm 812 Gs
81.2 mT
0.27 kg / 0.59 LBS
266.8 g / 2.6 N
safe
3 mm 666 Gs
66.6 mT
0.18 kg / 0.40 LBS
179.7 g / 1.8 N
safe
5 mm 415 Gs
41.5 mT
0.07 kg / 0.15 LBS
69.7 g / 0.7 N
safe
10 mm 126 Gs
12.6 mT
0.01 kg / 0.01 LBS
6.5 g / 0.1 N
safe
15 mm 49 Gs
4.9 mT
0.00 kg / 0.00 LBS
1.0 g / 0.0 N
safe
20 mm 23 Gs
2.3 mT
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
safe
30 mm 7 Gs
0.7 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
50 mm 2 Gs
0.2 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe

Table 2: Sliding capacity (vertical surface)
MW 12x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.08 kg / 0.19 LBS
84.0 g / 0.8 N
1 mm Stal (~0.2) 0.07 kg / 0.16 LBS
72.0 g / 0.7 N
2 mm Stal (~0.2) 0.05 kg / 0.12 LBS
54.0 g / 0.5 N
3 mm Stal (~0.2) 0.04 kg / 0.08 LBS
36.0 g / 0.4 N
5 mm Stal (~0.2) 0.01 kg / 0.03 LBS
14.0 g / 0.1 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 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) - vertical pull
MW 12x1 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.13 kg / 0.28 LBS
126.0 g / 1.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.08 kg / 0.19 LBS
84.0 g / 0.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.09 LBS
42.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.21 kg / 0.46 LBS
210.0 g / 2.1 N

Table 4: Steel thickness (substrate influence) - power losses
MW 12x1 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.04 kg / 0.09 LBS
42.0 g / 0.4 N
1 mm
25%
0.11 kg / 0.23 LBS
105.0 g / 1.0 N
2 mm
50%
0.21 kg / 0.46 LBS
210.0 g / 2.1 N
3 mm
75%
0.32 kg / 0.69 LBS
315.0 g / 3.1 N
5 mm
100%
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
10 mm
100%
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
11 mm
100%
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
12 mm
100%
0.42 kg / 0.93 LBS
420.0 g / 4.1 N

Table 5: Thermal resistance (stability) - resistance threshold
MW 12x1 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.42 kg / 0.93 LBS
420.0 g / 4.1 N
OK
40 °C -2.2% 0.41 kg / 0.91 LBS
410.8 g / 4.0 N
OK
60 °C -4.4% 0.40 kg / 0.89 LBS
401.5 g / 3.9 N
80 °C -6.6% 0.39 kg / 0.86 LBS
392.3 g / 3.8 N
100 °C -28.8% 0.30 kg / 0.66 LBS
299.0 g / 2.9 N

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 12x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.72 kg / 1.60 LBS
1 959 Gs
0.11 kg / 0.24 LBS
109 g / 1.1 N
N/A
1 mm 0.68 kg / 1.50 LBS
1 978 Gs
0.10 kg / 0.23 LBS
102 g / 1.0 N
0.61 kg / 1.35 LBS
~0 Gs
2 mm 0.62 kg / 1.36 LBS
1 883 Gs
0.09 kg / 0.20 LBS
93 g / 0.9 N
0.56 kg / 1.23 LBS
~0 Gs
3 mm 0.54 kg / 1.19 LBS
1 762 Gs
0.08 kg / 0.18 LBS
81 g / 0.8 N
0.49 kg / 1.07 LBS
~0 Gs
5 mm 0.38 kg / 0.84 LBS
1 479 Gs
0.06 kg / 0.13 LBS
57 g / 0.6 N
0.34 kg / 0.76 LBS
~0 Gs
10 mm 0.12 kg / 0.26 LBS
830 Gs
0.02 kg / 0.04 LBS
18 g / 0.2 N
0.11 kg / 0.24 LBS
~0 Gs
20 mm 0.01 kg / 0.02 LBS
253 Gs
0.00 kg / 0.00 LBS
2 g / 0.0 N
0.01 kg / 0.02 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
25 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
15 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
10 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
7 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
5 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
3 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Hazards (implants) - warnings
MW 12x1 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.5 cm
Hearing aid 10 Gs (1.0 mT) 3.0 cm
Mechanical watch 20 Gs (2.0 mT) 2.5 cm
Mobile device 40 Gs (4.0 mT) 2.0 cm
Remote 50 Gs (5.0 mT) 1.5 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) - warning
MW 12x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.63 km/h
(6.29 m/s)
0.02 J
30 mm 38.83 km/h
(10.79 m/s)
0.05 J
50 mm 50.13 km/h
(13.92 m/s)
0.08 J
100 mm 70.89 km/h
(19.69 m/s)
0.16 J

Table 9: Coating parameters (durability)
MW 12x1 / 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 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 564 Mx 15.6 µWb
Pc Coefficient 0.13 Low (Flat)

Table 11: Submerged application
MW 12x1 / N38

Environment Effective steel pull Effect
Air (land) 0.42 kg Standard
Water (riverbed) 0.48 kg
(+0.06 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. Wall mount (shear)

*Note: On a vertical surface, the magnet holds merely ~20% of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically weakens 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) = 0.13

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
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: 010015-2026
Quick Unit Converter
Pulling force

Magnetic Induction

Other offers

This product is an extremely powerful cylindrical magnet, composed of durable NdFeB material, which, with dimensions of Ø12x1 mm, guarantees the highest energy density. The MW 12x1 / N38 model boasts an accuracy of ±0.1mm and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.42 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 4.15 N with a weight of only 0.85 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 12.1 mm) using epoxy glues. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø12x1), 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 mm and height 1 mm. The key parameter here is the lifting capacity amounting to approximately 0.42 kg (force ~4.15 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface 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 diametrically if your project requires it.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (based on calculations),
  • Magnets perfectly resist against loss of magnetization caused by external fields,
  • A magnet with a smooth silver surface has better aesthetics,
  • They show high magnetic induction at the operating surface, which improves attraction properties,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of accurate creating as well as adapting to precise needs,
  • Versatile presence in high-tech industry – they find application in hard drives, drive modules, precision medical tools, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in compact constructions

Limitations

Problematic aspects of neodymium magnets and ways of using them
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 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 resistant to moisture, when using outdoors
  • We recommend casing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated forms.
  • Possible danger to health – tiny shards of magnets are risky, if swallowed, which gains importance in the context of child safety. It is also worth noting that small elements of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Best holding force of the magnet in ideal parameterswhat contributes to it?

The lifting capacity listed is a measurement result conducted under the following configuration:
  • on a block made of mild steel, effectively closing the magnetic flux
  • with a cross-section no less than 10 mm
  • with an ground contact surface
  • with zero gap (without coatings)
  • for force applied at a right angle (in the magnet axis)
  • at standard ambient temperature

Magnet lifting force in use – key factors

During everyday use, the actual lifting capacity results from many variables, presented from crucial:
  • Clearance – the presence of any layer (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, 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 penetrates through instead of converting into lifting capacity.
  • Metal type – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was determined with the use of a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under shearing force the holding force is lower. In addition, even a slight gap between the magnet and the plate lowers the lifting capacity.

Safety rules for work with neodymium magnets
Phone sensors

Remember: rare earth magnets produce a field that disrupts sensitive sensors. Keep a separation from your phone, device, and navigation systems.

Hand protection

Big blocks can break fingers in a fraction of a second. Do not place your hand betwixt two strong magnets.

Dust is flammable

Combustion risk: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

Powerful field

Handle magnets consciously. Their huge power can surprise even experienced users. Plan your moves and respect their power.

Magnetic media

Intense magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.

Allergy Warning

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, immediately stop working with magnets and use protective gear.

Demagnetization risk

Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. This process is irreversible.

This is not a toy

These products are not toys. Eating several magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires immediate surgery.

Implant safety

Life threat: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Magnet fragility

Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. Wear goggles.

Safety First! Details about risks in the article: Safety of working with magnets.