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MW 12x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010442

GTIN/EAN: 5906301811114

5.00
Load capacity 0.87 kg / 8.51 N Magnetic Induction 150.32 mT / 1503 Gs
Diameter Ø
12 mm [±0,1 mm]
Height
1.5 mm [±0,1 mm]
Weight
1.27 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical 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
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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

These information are the outcome of a engineering simulation. Values are based on models for the material Nd2Fe14B. Real-world parameters may differ from theoretical values. Use these data as a reference point for designers.

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

Table 2: Slippage hold (vertical surface)
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

Table 3: Wall mounting (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 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

Table 4: Steel thickness (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

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

Table 6: Two magnets (repulsion) - forces in the system
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

Table 7: Safety (HSE) (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
Phone / Smartphone 40 Gs (4.0 mT) 2.0 cm
Car key 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

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

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.59 km/h
(6.27 m/s)
0.02 J
30 mm 22.74 km/h
(6.32 m/s)
0.03 J
50 mm 22.74 km/h
(6.32 m/s)
0.03 J
100 mm 22.74 km/h
(6.32 m/s)
0.03 J

Table 9: Coating parameters (durability)
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)

Table 10: Construction 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)

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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

1. Vertical hold

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

2. Steel saturation

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

3. Power loss vs temp

*For N38 material, 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 and environmental data

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%

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

Pulling force


Magnetic Induction

Other proposals

This product is an extremely powerful rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø12x1.5 mm, guarantees optimal power. The MW 12x1.5 / N38 model 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 significant force (approx. 0.87 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. 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 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 long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable for the majority 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 store.
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 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 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. 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 through the diameter if your project requires it.

Strengths as well as weaknesses of neodymium magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:
  • They do not lose strength, even over nearly ten years – the reduction in lifting capacity is only ~1% (theoretically),
  • Magnets very well protect themselves against demagnetization caused by ambient magnetic noise,
  • Thanks to the reflective finish, the layer of Ni-Cu-Ni, gold, or silver gives an aesthetic appearance,
  • Neodymium magnets generate maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Considering the potential of flexible shaping and adaptation to specialized projects, NdFeB magnets can be modeled in a broad palette of forms and dimensions, which increases their versatility,
  • Significant place in electronics industry – they are utilized in mass storage devices, drive modules, advanced medical instruments, as well as industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Cons

Disadvantages of neodymium magnets:
  • At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • We recommend a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complicated forms.
  • Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. Furthermore, small elements of these magnets can complicate diagnosis medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Holding force characteristics

Detachment force of the magnet in optimal conditionswhat it depends on?

The load parameter shown refers to the peak performance, recorded under ideal test conditions, meaning:
  • with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • whose transverse dimension reaches at least 10 mm
  • with an ideally smooth contact surface
  • without the slightest insulating layer between the magnet and steel
  • for force applied at a right angle (in the magnet axis)
  • in temp. approx. 20°C

Key elements affecting lifting force

In real-world applications, the actual holding force depends on many variables, listed from crucial:
  • Distance – existence of any layer (rust, dirt, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
  • Smoothness – full contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature influence – hot environment reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity was measured by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Safety rules for work with NdFeB magnets
Phone sensors

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

Protect data

Device Safety: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, mechanical watches).

Conscious usage

Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.

Implant safety

Patients with a ICD should keep an absolute distance from magnets. The magnetism can stop the functioning of the life-saving device.

Do not drill into magnets

Combustion risk: Neodymium dust is highly flammable. Do not process magnets without safety gear as this risks ignition.

Thermal limits

Keep cool. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Physical harm

Risk of injury: The pulling power is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Product not for children

Absolutely keep magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are fatal.

Warning for allergy sufferers

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, immediately stop working with magnets and wear gloves.

Material brittleness

Beware of splinters. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

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