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MW 12x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010442

GTIN/EAN: 5906301811114

5.00

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

technical parameters »

0.431 ZŁ with VAT / pcs + price for transport

0.350 ZŁ net + 23% VAT / pcs

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Force and shape of neodymium magnets can be checked on our modular calculator.

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Detailed specification - 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
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 modeling of the magnet - technical parameters

The following information are the direct effect of a mathematical simulation. Results rely on algorithms for the material Nd2Fe14B. Actual conditions might slightly differ. Use these data as a supplementary guide during assembly planning.

Table 1: Static pull force (force vs distance) - interaction chart
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 lbs
870.0 g / 8.5 N
 safe
1 mm 1365 Gs
136.5 mT
 0.72 kg / 1.58 lbs
718.1 g / 7.0 N
 safe
2 mm 1163 Gs
116.3 mT
 0.52 kg / 1.15 lbs
521.4 g / 5.1 N
 safe
3 mm 947 Gs
94.7 mT
 0.35 kg / 0.76 lbs
345.7 g / 3.4 N
 safe
5 mm 587 Gs
58.7 mT
 0.13 kg / 0.29 lbs
132.6 g / 1.3 N
 safe
10 mm 180 Gs
18.0 mT
 0.01 kg / 0.03 lbs
12.5 g / 0.1 N
 safe
15 mm 70 Gs
7.0 mT
 0.00 kg / 0.00 lbs
1.9 g / 0.0 N
 safe
20 mm 33 Gs
3.3 mT
 0.00 kg / 0.00 lbs
0.4 g / 0.0 N
 safe
30 mm 11 Gs
1.1 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
50 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
Magnetic force weakens sharply with every subsequent millimeter of distance. Keep in mind that even a very thin break (e.g., contamination, paint, dust) strongly reduces the pull force. Magnetic products operate strongest during direct contact; air break drastically cuts the power. Analyze how flashily the parameters drop, when the magnet does not touch directly to the steel surface. When calculating the assembly, eliminate additional spacers.

Table 2: Vertical capacity (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 lbs
174.0 g / 1.7 N
1 mm Stal (~0.2) 0.14 kg / 0.32 lbs
144.0 g / 1.4 N
2 mm Stal (~0.2) 0.10 kg / 0.23 lbs
104.0 g / 1.0 N
3 mm Stal (~0.2) 0.07 kg / 0.15 lbs
70.0 g / 0.7 N
5 mm Stal (~0.2) 0.03 kg / 0.06 lbs
26.0 g / 0.3 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 following data defines the approximate weight limit required to cause the sliding of the magnet down on a upright steel wall (assuming typical friction coefficient). This parameter is a function of the distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
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 lbs
261.0 g / 2.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.17 kg / 0.38 lbs
174.0 g / 1.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.09 kg / 0.19 lbs
87.0 g / 0.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.44 kg / 0.96 lbs
435.0 g / 4.3 N
When hanging a element on a vertical wall (e.g., a board), it will maintain only about 20%-30% of its nominal power. Gravitational force and a weak degree of grip mean that magnets move down easier than they pop off the substrate. Planning a hanger? Note that the shear force is significantly lower than the perpendicular breakaway force. On a slippery surface, the holder will slip down under a noticeably lighter weight. Using a rubber pad can drastically increase the grip.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 12x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.09 kg / 0.19 lbs
87.0 g / 0.9 N
1 mm
25%
 0.22 kg / 0.48 lbs
217.5 g / 2.1 N
2 mm
50%
 0.44 kg / 0.96 lbs
435.0 g / 4.3 N
3 mm
75%
 0.65 kg / 1.44 lbs
652.5 g / 6.4 N
5 mm
100%
 0.87 kg / 1.92 lbs
870.0 g / 8.5 N
10 mm
100%
 0.87 kg / 1.92 lbs
870.0 g / 8.5 N
11 mm
100%
 0.87 kg / 1.92 lbs
870.0 g / 8.5 N
12 mm
100%
 0.87 kg / 1.92 lbs
870.0 g / 8.5 N
A too thin steel is incapable of conduct the entire magnetic field, which wastes potential of the holder. Should you attach a powerful product to a weak sheet, the magnetism will pass right through and the pull force will drop sharply. To squeeze the maximum of this magnet's potential, you require a sufficiently solid piece of steel. The saturation phenomenon means that on delicate walls (e.g., thin profiles), the magnet holds weaker. We advise picking the steel cross-section according to the table below.

Table 5: Working in heat (material behavior) - thermal limit
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 lbs
870.0 g / 8.5 N
 OK
40 °C -2.2% 0.85 kg / 1.88 lbs
850.9 g / 8.3 N
 OK
60 °C -4.4% 0.83 kg / 1.83 lbs
831.7 g / 8.2 N
80 °C -6.6% 0.81 kg / 1.79 lbs
812.6 g / 8.0 N
100 °C -28.8% 0.62 kg / 1.37 lbs
619.4 g / 6.1 N
Classic neodymiums lose strength above the temperature limit. Protect against heat – heat can irreversibly damage this magnet. As the temperature rises, the magnet's capacity temporarily lowers. Refrain from using this magnet close to ovens higher than its safe range. Too high temperature will cause irreversible degradation of magnetism.
*Engineering note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low Pc) are more susceptible to demagnetization at lower temperatures compared to rod magnets. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Two magnets (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 lbs
2 770 Gs
0.24 kg / 0.52 lbs
236 g / 2.3 N
 N/A
1 mm 1.46 kg / 3.21 lbs
2 891 Gs
0.22 kg / 0.48 lbs
219 g / 2.1 N
 1.31 kg / 2.89 lbs
~0 Gs
2 mm 1.30 kg / 2.87 lbs
2 731 Gs
0.19 kg / 0.43 lbs
195 g / 1.9 N
 1.17 kg / 2.58 lbs
~0 Gs
3 mm 1.12 kg / 2.48 lbs
2 538 Gs
0.17 kg / 0.37 lbs
168 g / 1.7 N
 1.01 kg / 2.23 lbs
~0 Gs
5 mm 0.78 kg / 1.71 lbs
2 109 Gs
0.12 kg / 0.26 lbs
116 g / 1.1 N
 0.70 kg / 1.54 lbs
~0 Gs
10 mm 0.24 kg / 0.53 lbs
1 173 Gs
0.04 kg / 0.08 lbs
36 g / 0.4 N
 0.22 kg / 0.48 lbs
~0 Gs
20 mm 0.02 kg / 0.05 lbs
361 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
 0.02 kg / 0.05 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
36 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
22 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
14 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
10 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
7 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
5 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two magnetic products interact from a significantly greater distance than a neodymium and metal combination. The setup of two magnets creates a more powerful interaction and a larger range of operation. Want to build a solid fastener? Apply two magnets instead of one magnet and a steel. Exercise caution that when bringing together two magnets, the pinch force is massive. The levitation is slightly lower than the connection force, but still large.
*Flux density in repulsion mode is approximately ~0 Gs in the exact middle of the gap (resulting from vector opposition).
Note: Estimates demonstrate shear force of dual matching neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (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
Mechanical watch 20 Gs (2.0 mT) 2.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.0 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) 0.5 cm
Powerful magnet radiation poses a large risk to electronic devices as well as medical implants. These magnets produce a flux that prevents correct functioning of digital equipment. Remember: the invisible magnetic field penetrates the body and housings. Increased vigilance must be taken by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, remotes, speakers, and displays. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - warning
MW 12x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 26.63 km/h
(7.40 m/s)
 0.03 J
30 mm 45.72 km/h
(12.70 m/s)
 0.10 J
50 mm 59.02 km/h
(16.40 m/s)
 0.17 J
100 mm 83.47 km/h
(23.19 m/s)
 0.34 J
Magnetic elements are prone to chipping – a collision with steel risks their cracking. Control the attraction moment – a magnet released freely becomes dangerous. Striking energy can trigger coating fragments or dangerous crushing to skin. Always hold the magnet during mounting so it doesn't hit with great force against the metal. A collision at high speed almost guarantees destruction of the neodymium. Wear safety glasses when working with large magnets.

Table 9: Corrosion resistance
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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Improper coating selection is the most common cause of magnet failure over time.

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)
Flux value passing through the magnet pole. Essential parameter for generator designers and motors. Pc value determines the working geometry.

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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.
1. Vertical hold

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

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Thermal stability

*For standard magnets, the safety 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
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%
Ecology and recycling (GPSR)
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
Force (pull)
Magnetic Induction
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The presented product is a very strong cylindrical magnet, composed of durable NdFeB material, which, with dimensions of Ø12x1.5 mm, guarantees optimal power. This specific item is characterized by 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. 0.87 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced Hall effect sensors, and efficient filters, where maximum induction 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 electronics and wherever low weight is crucial.
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 precision component. To ensure stability in industry, 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 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 warehouse.
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 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.
This rod magnet is magnetized axially (along the height of 1.5 mm), which means that the N and S poles are located on the flat, circular surfaces. 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.

Strengths as well as weaknesses of rare earth magnets.

Pros

Besides their stability, neodymium magnets are valued for these benefits:
  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (according to literature),
  • Neodymium magnets prove to be exceptionally resistant to magnetic field loss caused by magnetic disturbances,
  • Thanks to the metallic finish, the plating of Ni-Cu-Ni, gold, or silver-plated gives an modern appearance,
  • Magnets have very high magnetic induction on the active area,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to freedom in forming and the ability to customize to specific needs,
  • Key role in high-tech industry – they are used in magnetic memories, motor assemblies, medical devices, and multitasking production systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's 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 suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • We recommend a housing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complex forms.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. It is also worth noting that small elements of these devices are able to complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum magnetic pulling force – what affects it?

Holding force of 0.87 kg is a measurement result conducted under the following configuration:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • whose thickness reaches at least 10 mm
  • with a plane perfectly flat
  • with direct contact (no paint)
  • for force acting at a right angle (in the magnet axis)
  • in neutral thermal conditions

Determinants of practical lifting force of a magnet

Holding efficiency is influenced by specific conditions, such as (from priority):
  • Distance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Steel thickness – too thin plate causes magnetic saturation, causing part of the flux to be wasted into the air.
  • Steel grade – ideal substrate is high-permeability steel. Cast iron may have worse magnetic properties.
  • Surface structure – the more even the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet and the plate lowers the load capacity.

Precautions when working with NdFeB magnets
Hand protection

Watch your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing everything in their path. Be careful!

Risk of cracking

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Magnetic interference

A powerful magnetic field interferes with the functioning of compasses in smartphones and GPS navigation. Do not bring magnets near a smartphone to prevent breaking the sensors.

Maximum temperature

Do not overheat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Swallowing risk

Absolutely keep magnets out of reach of children. Ingestion danger is high, and the consequences of magnets clamping inside the body are tragic.

Skin irritation risks

A percentage of the population suffer from a hypersensitivity to nickel, which is the typical protective layer for neodymium magnets. Frequent touching can result in skin redness. We recommend use protective gloves.

Caution required

Use magnets with awareness. Their huge power can surprise even professionals. Stay alert and do not underestimate their power.

Dust is flammable

Dust generated during grinding of magnets is flammable. Do not drill into magnets unless you are an expert.

Life threat

Warning for patients: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or ask another person to work with the magnets.

Safe distance

Intense magnetic fields can erase data on payment cards, hard drives, and storage devices. Stay away of min. 10 cm.

Safety First! Need more info? Read our article: Are neodymium magnets dangerous?