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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 specifications »

0.431 ZŁ with VAT / pcs + price for transport

0.350 ZŁ net + 23% VAT / pcs

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Strength as well as structure of a neodymium magnet can be reviewed with our power calculator.

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Product card - 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 - data

The following information constitute the result of a physical simulation. Values are based on algorithms for the material Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Use these calculations as a preliminary roadmap for designers.

Table 1: Static pull force (force vs gap) - 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 pounds
870.0 g / 8.5 N
 weak grip
1 mm 1365 Gs
136.5 mT
 0.72 kg / 1.58 pounds
718.1 g / 7.0 N
 weak grip
2 mm 1163 Gs
116.3 mT
 0.52 kg / 1.15 pounds
521.4 g / 5.1 N
 weak grip
3 mm 947 Gs
94.7 mT
 0.35 kg / 0.76 pounds
345.7 g / 3.4 N
 weak grip
5 mm 587 Gs
58.7 mT
 0.13 kg / 0.29 pounds
132.6 g / 1.3 N
 weak grip
10 mm 180 Gs
18.0 mT
 0.01 kg / 0.03 pounds
12.5 g / 0.1 N
 weak grip
15 mm 70 Gs
7.0 mT
 0.00 kg / 0.00 pounds
1.9 g / 0.0 N
 weak grip
20 mm 33 Gs
3.3 mT
 0.00 kg / 0.00 pounds
0.4 g / 0.0 N
 weak grip
30 mm 11 Gs
1.1 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
50 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
Grip strength drops sharply with every mm of distance. Remember that even a very thin break (e.g., contamination, varnish, rust) noticeably weakens the grip. Neodymiums operate most effectively at the point of direct contact; distance weakens the power. See how quickly the load capacity plummet, when the magnet does not touch tightly to the steel surface. When planning the assembly, avoid redundant distances.

Table 2: Shear 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 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
This section defines the estimated holding capacity sufficient to start the sliding of the magnet down on a vertical metal surface (considering typical friction). This parameter is relative to the separation distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - 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
When mounting a holder on a vertical wall (e.g., a board), it will maintain only approx. 20%-30% of nominal attraction strength. Gravity and a weak degree of grip cause that products slip easier than they detach. Planning a wall mount? Note that the shear force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a significantly smaller load. Using a rubber coating can drastically increase the grip.

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
A too thin steel is not enough to focus the full magnetic flux, which wastes potential of the holder. If you install a neodymium to a weak sheet, the field will penetrate right through and the attraction force will be weaker. To squeeze full efficiency of this magnet's power, you need a suitably thick element of metal. The saturation phenomenon causes that on sheet metal structures (e.g., car bodies), the magnet holds weaker. We recommend selecting the steel dimension based on the following data.

Table 5: Working in heat (stability) - 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
Standard neodymium magnets lose power after exceeding the maximum temperature. Watch out for overheating – high temperature can irreversibly damage this magnet. With every degree above norm, the neodymium's capacity momentarily drops. Refrain from using this product close to ovens higher than its safe range. Ignoring the limit will cause permanent loss of magnetic properties.
*Important note: Heat tolerance is determined by both grade, but also on the magnet's shape. Thin magnets (low Pc) may lose charge permanently under lower heat stress than long magnets. Red status in the table points to a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
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
Two magnets attract each other from a significantly greater distance than a neodymium and metal setup. The connection of magnet-to-magnet produces a massive flux and a wider radius of action. Planning to create a strong closure? Apply two magnets instead of one magnet and a striker plate. Exercise caution that when attracting two neodymiums, the impact force is massive. The levitation is marginally weaker than the connection force, but still impressive.
*Field value for N-N configuration reaches ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Attention: Calculations demonstrate shear force of dual same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - 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 is a large risk to IT equipment and medical implants. These NdFeB products produce a field that prevents correct functioning of sensitive medical devices. Be aware: the invisible magnetic field acts through matter and plastic. Special caution must be exercised by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, remotes, membranes, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Collisions (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
Neodymium magnets are very brittle – a strong collision with metal risks their cracking. Control the attraction moment – a neodymium left loose turns into a projectile. Kinetic force can destroy the magnet or painful pinches to skin. Be sure to control the product during mounting so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Use safety goggles when working with powerful specimens.

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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Note the thickness of the protective layer.

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)
Total magnetic flux emitted by the magnet pole. Essential parameter in coil applications as well as sensors. Pc value determines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.
1. Shear force

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

2. Steel saturation

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

3. Heat tolerance

*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.

Technical specification and ecology
Material specification
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
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Field Strength
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The presented product is an incredibly powerful cylinder magnet, composed of advanced NdFeB material, which, at dimensions of Ø12x1.5 mm, guarantees the highest energy density. This specific item is characterized by high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.87 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced 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 miniature devices 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 professional component. To ensure stability in automation, specialized industrial adhesives 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 professional neodymium magnets, offering an optimal price-to-power ratio and operational stability. 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 value of 8.51 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.27 g. The product has a [NiCuNi] coating, which secures it 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 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 Nd2Fe14B magnets.

Benefits

Besides their remarkable strength, neodymium magnets offer the following advantages:
  • Their magnetic field is maintained, and after approximately 10 years it decreases only by ~1% (theoretically),
  • Magnets very well resist against demagnetization caused by foreign field sources,
  • By using a shiny coating of silver, the element has an professional look,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Possibility of precise modeling as well as adjusting to precise requirements,
  • Fundamental importance in electronics industry – they are utilized in HDD drives, electric drive systems, medical devices, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in compact constructions

Weaknesses

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their strength 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
  • Due to limitations in producing nuts and complex forms in magnets, we recommend using a housing - magnetic holder.
  • Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child health protection. It is also worth noting that tiny parts of these products are able to disrupt the diagnostic process medical in case of swallowing.
  • Due to neodymium price, their price exceeds standard values,

Pull force analysis

Detachment force of the magnet in optimal conditions – what it depends on?

The force parameter is a theoretical maximum value performed under standard conditions:
  • with the contact of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • possessing a thickness of at least 10 mm to avoid saturation
  • with an ideally smooth touching surface
  • under conditions of no distance (surface-to-surface)
  • during pulling in a direction vertical to the mounting surface
  • at room temperature

Key elements affecting lifting force

Holding efficiency is affected by specific conditions, mainly (from priority):
  • Distance – existence of any layer (paint, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Material type – ideal substrate is pure iron steel. Cast iron may attract less.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
  • Temperature – temperature increase causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity was measured with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate decreases the load capacity.

Safety rules for work with NdFeB magnets
Machining danger

Machining of neodymium magnets poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Bodily injuries

Big blocks can smash fingers instantly. Do not place your hand betwixt two attracting surfaces.

Safe operation

Use magnets consciously. Their powerful strength can surprise even professionals. Plan your moves and respect their force.

Do not overheat magnets

Avoid heat. Neodymium magnets are susceptible to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).

Medical interference

Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Nickel coating and allergies

A percentage of the population suffer from a sensitization to Ni, which is the common plating for neodymium magnets. Extended handling might lead to a rash. We recommend wear safety gloves.

Magnetic media

Avoid bringing magnets close to a purse, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

Material brittleness

Beware of splinters. Magnets can fracture upon uncontrolled impact, launching shards into the air. Wear goggles.

Phone sensors

GPS units and mobile phones are extremely sensitive to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Do not give to children

Adult use only. Tiny parts pose a choking risk, leading to intestinal necrosis. Keep out of reach of kids and pets.

Caution! Learn more about risks in the article: Magnet Safety Guide.