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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

check properties »

0.431 ZŁ with VAT / pcs + price for transport

0.350 ZŁ net + 23% VAT / pcs

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Technical details - 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

Technical simulation of the product - technical parameters

Presented values represent the outcome of a engineering simulation. Values were calculated on models for the class Nd2Fe14B. Real-world parameters may differ. Treat these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull 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
 weak grip
1 mm 1365 Gs
136.5 mT
 0.72 kg / 1.58 lbs
718.1 g / 7.0 N
 weak grip
2 mm 1163 Gs
116.3 mT
 0.52 kg / 1.15 lbs
521.4 g / 5.1 N
 weak grip
3 mm 947 Gs
94.7 mT
 0.35 kg / 0.76 lbs
345.7 g / 3.4 N
 weak grip
5 mm 587 Gs
58.7 mT
 0.13 kg / 0.29 lbs
132.6 g / 1.3 N
 weak grip
10 mm 180 Gs
18.0 mT
 0.01 kg / 0.03 lbs
12.5 g / 0.1 N
 weak grip
15 mm 70 Gs
7.0 mT
 0.00 kg / 0.00 lbs
1.9 g / 0.0 N
 weak grip
20 mm 33 Gs
3.3 mT
 0.00 kg / 0.00 lbs
0.4 g / 0.0 N
 weak grip
30 mm 11 Gs
1.1 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 weak grip
50 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 weak grip
Magnetic force weakens significantly with every subsequent millimeter of gap. Remember that even a microscopic distance (e.g., contamination, varnish, rust) strongly weakens the grip. Magnets hold strongest during direct contact; gap kills the power. See how flashily the load capacity drop, when the magnet does not adhere tightly to the steel surface. When planning the assembly, avoid 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
This section presents the approximate force required to cause the downward movement of the magnet vertically against a upright steel wall (assuming standard friction). The holding force is a function of the distance between the magnet and the metal.

Table 3: Vertical assembly (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 placing a element on a vertical plane (e.g., a car body), it you can count on only about 1/5 of its maximum pull force. Gravitational force and a weak degree of grip mean that magnets move down faster than they detach. Designing a vertical fastening? Consider that the shear force is significantly lower than the maximum static pull force. On a painted metal, the magnet will slide down under a much lighter weight. Using a rubber pad can significantly increase the grip.

Table 4: Material efficiency (saturation) - 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 thin sheet is incapable of focus the full magnetic flux, which weakens actual performance of the magnet. Should you attach a powerful product to a too thin substrate, the magnetism will pass right through and the attraction force will be weaker. To achieve the maximum of this magnet's power, you require a sufficiently solid backing of metal. The saturation effect causes that on sheet metal structures (e.g., car bodies), the product holds weaker. We recommend selecting the steel dimension according to the table below.

Table 5: Working in heat (material behavior) - power drop
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
Standard neodymium magnets lose power above the temperature limit. Avoid high temperatures – heat can irreversibly damage this product. With increasing heat, the magnet's force briefly decreases. Avoid using this magnet near heat sources exceeding its operating temperature limit. Too high temperature will cause irreversible degradation of magnetic properties.
*Important note: Thermal stability depends not only on the material grade, but also on the magnet's shape. Flat magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures than taller cylinders. Warning indicator in the table points to a risk of irreversible loss for this particular item.

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

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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 strong neodymiums attract each other from a significantly greater distance than a magnet and steel setup. Such a system of two magnets produces a massive flux and a larger range of action. Planning to create a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Be careful that when bringing together two magnets, the pinch force is huge. The levitation is a bit weaker than the attraction, but still significant.
*Flux density in repulsion mode drops to ~0 Gs in the exact middle of the gap (due to field cancellation).
* Results show sliding force of dual matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - warnings
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
Mobile device 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 electronics and medical implants. These magnets produce a field that destroys function of digital equipment. Remember: the invisible magnetic field penetrates the body and glass. Special caution must be taken by people with hearing aids and drug dispensers. The risk also applies to: mechanical watches, car keys, membranes, and screens. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
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
Neodymium magnets are prone to chipping – a violent impact against metal risks their cracking. Control the attraction moment – a magnet released freely becomes dangerous. Striking energy can trigger coating fragments or injury to skin. Always hold the magnet during installation so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h means shattering of the magnet. Use safety goggles when playing 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)
The following table defines the conditions under which this product can be safely used. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Pc)
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 pole surface. Key data for generator designers and motors. The Pc coefficient determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
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!
In water, the magnet feels stronger thanks to Archimedes' principle. Buoyancy helps in lifting finds.
1. Shear force

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

2. Plate thickness effect

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

3. Temperature resistance

*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) = 0.19

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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
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%
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
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This product is an exceptionally strong cylinder magnet, made from modern NdFeB material, which, with dimensions of Ø12x1.5 mm, guarantees the highest energy density. This specific item features high dimensional repeatability and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 0.87 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 8.51 N with a weight of only 1.27 g, this rod 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 two-component epoxy glues. To ensure stability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø12x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
This model is characterized by dimensions Ø12x1.5 mm, which, at a weight of 1.27 g, makes it an element with impressive magnetic energy density. 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 protects the surface against oxidation, giving it an aesthetic, silvery shine.
This cylinder 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. Such an arrangement is standard 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.

Strengths and weaknesses of rare earth magnets.

Strengths

Besides their durability, 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% (based on calculations),
  • Neodymium magnets are exceptionally resistant to magnetic field loss caused by magnetic disturbances,
  • The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to look better,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures approaching 230°C and above...
  • Possibility of accurate machining and adjusting to atypical conditions,
  • Universal use in modern technologies – they are used in mass storage devices, electric motors, precision medical tools, as well as complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in miniature devices

Limitations

Problematic aspects of neodymium magnets: application proposals
  • At very strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose their power 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 stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We suggest cover - magnetic mount, due to difficulties in producing threads inside the magnet and complicated shapes.
  • Possible danger to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. Additionally, tiny parts of these devices can complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum lifting capacity of the magnet – what contributes to it?

The specified lifting capacity refers to the maximum value, obtained under optimal environment, specifically:
  • with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
  • with a thickness minimum 10 mm
  • characterized by lack of roughness
  • without any air gap between the magnet and steel
  • under axial application of breakaway force (90-degree angle)
  • at ambient temperature room level

Lifting capacity in practice – influencing factors

Real force is influenced by working environment parameters, mainly (from priority):
  • Space between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Direction of force – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. Alloy additives worsen the attraction effect.
  • Surface condition – smooth surfaces ensure maximum contact, which increases force. Uneven metal weaken the grip.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity was measured with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.

Precautions when working with neodymium magnets
Metal Allergy

Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness occurs, immediately stop working with magnets and use protective gear.

This is not a toy

Only for adults. Small elements can be swallowed, leading to severe trauma. Store out of reach of kids and pets.

Material brittleness

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

ICD Warning

Patients with a pacemaker have to keep an safe separation from magnets. The magnetism can interfere with the operation of the life-saving device.

Crushing risk

Mind your fingers. Two large magnets will snap together immediately with a force of massive weight, crushing anything in their path. Be careful!

Keep away from computers

Do not bring magnets close to a wallet, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Power loss in heat

Control the heat. Exposing the magnet to high heat will permanently weaken its magnetic structure and pulling force.

Handling rules

Before starting, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.

Phone sensors

Remember: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a safe distance from your mobile, tablet, and GPS.

Machining danger

Mechanical processing of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Danger! Looking for details? Read our article: Are neodymium magnets dangerous?