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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

check specifications »

0.578 ZŁ 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

Technical modeling of the assembly - technical parameters

The following information are the outcome of a engineering analysis. Values were calculated on models for the class Nd2Fe14B. Actual performance might slightly differ. Treat these data as a reference point when designing systems.

Table 1: Static force (force vs distance) - interaction chart
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
Grip strength decreases significantly per each millimeter of gap. Keep in mind that even a microscopic distance (e.g., contamination, paint, dust) significantly weakens the grip. Neodymiums hold strongest in perfect adhesion; gap weakens the force. Observe how flashily the parameters fall, when the magnet does not touch directly to the steel surface. When calculating the arrangement, eliminate unnecessary gaps.

Table 2: Shear force (wall)
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
The table below presents the theoretical force required to cause the sliding of the magnet vertically on a upright metal surface (assuming standard friction). The holding force is a function of the gap size between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
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
When hanging a holder on a vertical plane (e.g., a car body), it will only hold only about 20%-30% of its maximum pull force. Gravity as well as a low friction coefficient cause that holders slide down easier than they pop off the substrate. Planning a vertical fastening? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a painted metal, the magnet will give way down under a much lighter cargo. Using a rubber pad can effectively raise the stability.

Table 4: Material efficiency (saturation) - sheet metal selection
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
A too thin steel is unable to conduct the entire magnetic field, which weakens actual performance of the magnet. Should you mount a strong magnet to a thin surface, the magnetism will penetrate right through and the pull force will drop sharply. To achieve 100% of this neodymium's power, you require a sufficiently solid piece of steel. The saturation phenomenon causes that on sheet metal structures (e.g., appliance housings), the magnet works worse. We suggest choosing the steel cross-section based on the following data.

Table 5: Thermal stability (stability) - thermal limit
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
Classic neodymiums lose power above the temperature limit. Watch out for overheating – high temperature can irreversibly destroy this magnet. With increasing heat, the neodymium's force momentarily lowers. Refrain from using this product near heat sources higher than its operating temperature limit. Ignoring the limit will result in irreversible degradation of magnetic properties.
*Technical advisory: Heat tolerance is determined by both grade, but also on the magnet's shape. Flat magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures compared to rod magnets. Warning indicator in the table signals a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 12x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear 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
Two magnetic products attract each other from a much further distance than a magnet and sheet combination. The setup of magnet-to-magnet generates a stronger field and a larger range of performance. Planning to create a powerful holder? Apply two magnets instead of one magnet and a steel. Remember that when connecting a pair of magnets, the impact force is massive. The repulsion force is a bit weaker than the attraction, but still impressive.
*Field value in repulsion mode reaches ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Note: Figures demonstrate sliding force of dual identical neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (implants) - precautionary measures
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
Timepiece 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
Extremely neodym field poses a real danger to IT equipment and medical implants. These magnets produce a flux that destroys function of sensitive medical devices. Be aware: the invisible magnetic field passes through tissues and plastic. Special caution must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, remotes, speakers, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
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
NdFeB products are delicate – a violent impact against metal can result in shattering. Control the attraction moment – a neodymium left loose turns into a projectile. Kinetic force can trigger coating fragments or dangerous crushing to skin. Hold the magnet firmly during mounting so it doesn't hit violently against the steel surface. A collision at high speed means shattering of the magnet. Wear safety glasses when playing with large magnets.

Table 9: Surface protection spec
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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

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)
Total magnetic flux emitted by the pole surface. Key data in coil applications as well as sensors. Pc value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Wall mount (shear)

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

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.

3. Temperature resistance

*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) = 0.13

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.

Technical specification and ecology
Chemical composition
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%
Sustainability
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
Measurement Calculator
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Magnetic Field
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The offered product is an extremely powerful rod magnet, produced from modern NdFeB material, which, with dimensions of Ø12x1 mm, guarantees the highest energy density. This specific item features a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 0.42 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 4.15 N with a weight of only 0.85 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability 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 even stronger 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 store.
This model is characterized by dimensions Ø12x1 mm, which, at a weight of 0.85 g, makes it an element with high magnetic energy density. The value of 4.15 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.85 g. 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 and disadvantages of neodymium magnets.

Pros

Besides their exceptional pulling force, neodymium magnets offer the following advantages:
  • Their power is maintained, and after approximately ten years it drops only by ~1% (theoretically),
  • They are extremely resistant to demagnetization induced by presence of other magnetic fields,
  • Thanks to the shimmering finish, the surface of Ni-Cu-Ni, gold-plated, or silver-plated gives an elegant appearance,
  • Neodymium magnets achieve maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • 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...
  • Due to the possibility of flexible molding and adaptation to individualized solutions, neodymium magnets can be manufactured in a wide range of shapes and sizes, which makes them more universal,
  • Key role in innovative solutions – they are utilized in HDD drives, brushless drives, precision medical tools, and technologically advanced constructions.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Disadvantages

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in realizing threads and complicated forms in magnets, we propose using casing - magnetic mount.
  • Health risk related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these devices can be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Holding force of 0.42 kg is a result of laboratory testing conducted under the following configuration:
  • on a base made of structural steel, effectively closing the magnetic flux
  • with a cross-section of at least 10 mm
  • with an ground contact surface
  • under conditions of ideal adhesion (metal-to-metal)
  • under perpendicular application of breakaway force (90-degree angle)
  • at room temperature

Lifting capacity in practice – influencing factors

Real force impacted by working environment parameters, mainly (from priority):
  • Clearance – the presence of foreign body (rust, dirt, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Angle of force application – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick plate does not accept the full field, causing part of the power to be wasted into the air.
  • Metal type – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the holding force is lower. In addition, even a slight gap between the magnet and the plate lowers the load capacity.

Safety rules for work with neodymium magnets
Conscious usage

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

Warning for allergy sufferers

It is widely known that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, prevent touching magnets with bare hands and choose coated magnets.

Electronic devices

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

Danger to the youngest

These products are not suitable for play. Eating a few magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates urgent medical intervention.

Health Danger

Patients with a heart stimulator must maintain an safe separation from magnets. The magnetism can interfere with the functioning of the life-saving device.

Bone fractures

Large magnets can break fingers in a fraction of a second. Never put your hand betwixt two attracting surfaces.

Dust explosion hazard

Fire warning: Neodymium dust is explosive. Do not process magnets without safety gear as this may cause fire.

GPS Danger

Note: rare earth magnets produce a field that interferes with precision electronics. Keep a separation from your phone, device, and GPS.

Magnet fragility

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets will cause them cracking into shards.

Operating temperature

Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.

Warning! Details about risks in the article: Magnet Safety Guide.