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MW 12x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010017

GTIN/EAN: 5906301810162

5.00
Load capacity 1.39 kg / 13.66 N Magnetic Induction 195.97 mT / 1960 Gs
Diameter Ø
12 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
1.7 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 - MW 12x2 / N38 - cylindrical magnet

Specification / characteristics - MW 12x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010017
GTIN/EAN 5906301810162
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 2 mm [±0,1 mm]
Weight 1.7 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.39 kg / 13.66 N
Magnetic Induction ~ ? 195.97 mT / 1960 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x2 / 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 simulation of the assembly - technical parameters

Presented information constitute the outcome of a engineering simulation. Results were calculated on algorithms for the material Nd2Fe14B. Operational conditions may deviate from the simulation results. Treat these calculations as a supplementary guide during assembly planning.

Table 1: Static pull force (force vs gap) - characteristics
MW 12x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1959 Gs
195.9 mT
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
safe
1 mm 1753 Gs
175.3 mT
1.11 kg / 2.45 LBS
1113.5 g / 10.9 N
safe
2 mm 1479 Gs
147.9 mT
0.79 kg / 1.75 LBS
791.7 g / 7.8 N
safe
3 mm 1196 Gs
119.6 mT
0.52 kg / 1.14 LBS
518.4 g / 5.1 N
safe
5 mm 738 Gs
73.8 mT
0.20 kg / 0.44 LBS
197.4 g / 1.9 N
safe
10 mm 229 Gs
22.9 mT
0.02 kg / 0.04 LBS
19.0 g / 0.2 N
safe
15 mm 90 Gs
9.0 mT
0.00 kg / 0.01 LBS
2.9 g / 0.0 N
safe
20 mm 43 Gs
4.3 mT
0.00 kg / 0.00 LBS
0.7 g / 0.0 N
safe
30 mm 14 Gs
1.4 mT
0.00 kg / 0.00 LBS
0.1 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: Shear load (vertical surface)
MW 12x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.28 kg / 0.61 LBS
278.0 g / 2.7 N
1 mm Stal (~0.2) 0.22 kg / 0.49 LBS
222.0 g / 2.2 N
2 mm Stal (~0.2) 0.16 kg / 0.35 LBS
158.0 g / 1.5 N
3 mm Stal (~0.2) 0.10 kg / 0.23 LBS
104.0 g / 1.0 N
5 mm Stal (~0.2) 0.04 kg / 0.09 LBS
40.0 g / 0.4 N
10 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 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 12x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.42 kg / 0.92 LBS
417.0 g / 4.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.28 kg / 0.61 LBS
278.0 g / 2.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.14 kg / 0.31 LBS
139.0 g / 1.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.70 kg / 1.53 LBS
695.0 g / 6.8 N

Table 4: Material efficiency (saturation) - power losses
MW 12x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.14 kg / 0.31 LBS
139.0 g / 1.4 N
1 mm
25%
0.35 kg / 0.77 LBS
347.5 g / 3.4 N
2 mm
50%
0.70 kg / 1.53 LBS
695.0 g / 6.8 N
3 mm
75%
1.04 kg / 2.30 LBS
1042.5 g / 10.2 N
5 mm
100%
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
10 mm
100%
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
11 mm
100%
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
12 mm
100%
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N

Table 5: Thermal stability (material behavior) - resistance threshold
MW 12x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
OK
40 °C -2.2% 1.36 kg / 3.00 LBS
1359.4 g / 13.3 N
OK
60 °C -4.4% 1.33 kg / 2.93 LBS
1328.8 g / 13.0 N
80 °C -6.6% 1.30 kg / 2.86 LBS
1298.3 g / 12.7 N
100 °C -28.8% 0.99 kg / 2.18 LBS
989.7 g / 9.7 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 12x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.68 kg / 5.90 LBS
3 435 Gs
0.40 kg / 0.88 LBS
401 g / 3.9 N
N/A
1 mm 2.44 kg / 5.37 LBS
3 739 Gs
0.37 kg / 0.81 LBS
366 g / 3.6 N
2.19 kg / 4.84 LBS
~0 Gs
2 mm 2.14 kg / 4.73 LBS
3 507 Gs
0.32 kg / 0.71 LBS
322 g / 3.2 N
1.93 kg / 4.25 LBS
~0 Gs
3 mm 1.83 kg / 4.04 LBS
3 241 Gs
0.27 kg / 0.61 LBS
275 g / 2.7 N
1.65 kg / 3.63 LBS
~0 Gs
5 mm 1.24 kg / 2.74 LBS
2 671 Gs
0.19 kg / 0.41 LBS
187 g / 1.8 N
1.12 kg / 2.47 LBS
~0 Gs
10 mm 0.38 kg / 0.84 LBS
1 476 Gs
0.06 kg / 0.13 LBS
57 g / 0.6 N
0.34 kg / 0.75 LBS
~0 Gs
20 mm 0.04 kg / 0.08 LBS
458 Gs
0.01 kg / 0.01 LBS
5 g / 0.1 N
0.03 kg / 0.07 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
47 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
28 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
18 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
13 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
9 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
7 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 12x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 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) 1.0 cm

Table 8: Collisions (kinetic energy) - warning
MW 12x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.16 km/h
(6.71 m/s)
0.04 J
30 mm 24.32 km/h
(6.75 m/s)
0.04 J
50 mm 24.32 km/h
(6.76 m/s)
0.04 J
100 mm 24.32 km/h
(6.76 m/s)
0.04 J

Table 9: Corrosion resistance
MW 12x2 / 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 12x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 665 Mx 26.7 µWb
Pc Coefficient 0.25 Low (Flat)

Table 11: Hydrostatics and buoyancy
MW 12x2 / N38

Environment Effective steel pull Effect
Air (land) 1.39 kg Standard
Water (riverbed) 1.59 kg
(+0.20 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!

1. Sliding resistance

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

2. Steel thickness impact

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

3. Power loss vs temp

*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) = 0.25

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: 010017-2026
Measurement Calculator

Force (pull)


Magnetic Field

Other proposals

The offered product is an incredibly powerful rod magnet, manufactured from durable NdFeB material, which, with dimensions of Ø12x2 mm, guarantees the highest energy density. This specific item features high dimensional repeatability and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 1.39 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 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 13.66 N with a weight of only 1.7 g, this cylindrical magnet 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 epoxy glues. To ensure long-term durability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are suitable for the majority of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø12x2), 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 Ø12x2 mm, which, at a weight of 1.7 g, makes it an element with impressive magnetic energy density. The value of 13.66 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.7 g. The product has a [NiCuNi] coating, which protects the surface against external factors, 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 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.

Pros as well as cons of neodymium magnets.

Advantages

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even after nearly 10 years – the drop in power is only ~1% (theoretically),
  • Neodymium magnets are characterized by exceptionally resistant to magnetic field loss caused by external field sources,
  • Thanks to the glossy finish, the layer of Ni-Cu-Ni, gold-plated, or silver gives an clean appearance,
  • Magnets exhibit impressive magnetic induction on the working surface,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • Possibility of individual creating as well as adapting to concrete requirements,
  • Huge importance in high-tech industry – they serve a role in magnetic memories, motor assemblies, medical devices, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which allows their use in compact constructions

Limitations

Problematic aspects of neodymium magnets: application proposals
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
  • Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited ability of creating nuts in the magnet and complicated forms - recommended is a housing - magnet mounting.
  • Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. Furthermore, tiny parts of these devices are able to be problematic in diagnostics medical after entering the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat it depends on?

The lifting capacity listed is a measurement result conducted under standard conditions:
  • using a sheet made of mild steel, acting as a circuit closing element
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • with a surface cleaned and smooth
  • without any insulating layer between the magnet and steel
  • for force applied at a right angle (in the magnet axis)
  • at temperature room level

Key elements affecting lifting force

Bear in mind that the working load will differ subject to elements below, starting with the most relevant:
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Base massiveness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be escaped into the air.
  • Steel grade – the best choice is pure iron steel. Stainless steels may generate lower lifting capacity.
  • Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Temperature – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate decreases the holding force.

Warnings
Protective goggles

NdFeB magnets are ceramic materials, which means they are prone to chipping. Collision of two magnets will cause them cracking into shards.

Adults only

Absolutely keep magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are life-threatening.

Crushing force

Large magnets can smash fingers in a fraction of a second. Never place your hand between two strong magnets.

Power loss in heat

Control the heat. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.

Electronic devices

Data protection: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).

Metal Allergy

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If an allergic reaction occurs, immediately stop handling magnets and wear gloves.

Combustion hazard

Fire hazard: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.

Phone sensors

GPS units and smartphones are extremely sensitive to magnetism. Direct contact with a strong magnet can ruin the sensors in your phone.

ICD Warning

Patients with a ICD should maintain an safe separation from magnets. The magnetic field can stop the functioning of the life-saving device.

Respect the power

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

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