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MW 12x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010017

GTIN/EAN: 5906301810162

5.00

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

technical specifications »

1.132 ZŁ with VAT / pcs + price for transport

0.920 ZŁ net + 23% VAT / pcs

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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
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 simulation of the magnet - data

The following information represent the direct effect of a mathematical analysis. Values rely on algorithms for the material Nd2Fe14B. Actual conditions may deviate from the simulation results. Use these data as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - 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 pounds
1390.0 g / 13.6 N
 weak grip
1 mm 1753 Gs
175.3 mT
 1.11 kg / 2.45 pounds
1113.5 g / 10.9 N
 weak grip
2 mm 1479 Gs
147.9 mT
 0.79 kg / 1.75 pounds
791.7 g / 7.8 N
 weak grip
3 mm 1196 Gs
119.6 mT
 0.52 kg / 1.14 pounds
518.4 g / 5.1 N
 weak grip
5 mm 738 Gs
73.8 mT
 0.20 kg / 0.44 pounds
197.4 g / 1.9 N
 weak grip
10 mm 229 Gs
22.9 mT
 0.02 kg / 0.04 pounds
19.0 g / 0.2 N
 weak grip
15 mm 90 Gs
9.0 mT
 0.00 kg / 0.01 pounds
2.9 g / 0.0 N
 weak grip
20 mm 43 Gs
4.3 mT
 0.00 kg / 0.00 pounds
0.7 g / 0.0 N
 weak grip
30 mm 14 Gs
1.4 mT
 0.00 kg / 0.00 pounds
0.1 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
Pulling power weakens sharply with every subsequent millimeter of distance. Remember that even a microscopic distance (e.g., dirt, paint, rust) significantly diminishes the holding power. Neodymiums hold most effectively during direct contact; air break kills the force. See how flashily the load capacity plummet, when the magnet does not adhere directly to the steel surface. When calculating the assembly, avoid redundant distances.

Table 2: Sliding hold (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 pounds
278.0 g / 2.7 N
1 mm Stal (~0.2) 0.22 kg / 0.49 pounds
222.0 g / 2.2 N
2 mm Stal (~0.2) 0.16 kg / 0.35 pounds
158.0 g / 1.5 N
3 mm Stal (~0.2) 0.10 kg / 0.23 pounds
104.0 g / 1.0 N
5 mm Stal (~0.2) 0.04 kg / 0.09 pounds
40.0 g / 0.4 N
10 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 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
The following data shows the approximate holding capacity required to initiate the downward movement of the magnet vertically on a upright metal surface (considering typical friction). This parameter is a function of the separation distance between the magnet and the surface.

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 pounds
417.0 g / 4.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.28 kg / 0.61 pounds
278.0 g / 2.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.14 kg / 0.31 pounds
139.0 g / 1.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.70 kg / 1.53 pounds
695.0 g / 6.8 N
When hanging a element on a upright wall (e.g., a car body), it will only hold just about 20%-30% of its nominal power. Gravitational force as well as a low friction coefficient cause that products move down faster than they pull off. Designing a hanger? Remember that the sliding force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the element will slide down under a significantly smaller weight. Utilizing a rubberized layer can significantly raise the stability.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 12x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.14 kg / 0.31 pounds
139.0 g / 1.4 N
1 mm
25%
 0.35 kg / 0.77 pounds
347.5 g / 3.4 N
2 mm
50%
 0.70 kg / 1.53 pounds
695.0 g / 6.8 N
3 mm
75%
 1.04 kg / 2.30 pounds
1042.5 g / 10.2 N
5 mm
100%
 1.39 kg / 3.06 pounds
1390.0 g / 13.6 N
10 mm
100%
 1.39 kg / 3.06 pounds
1390.0 g / 13.6 N
11 mm
100%
 1.39 kg / 3.06 pounds
1390.0 g / 13.6 N
12 mm
100%
 1.39 kg / 3.06 pounds
1390.0 g / 13.6 N
A thin metal plate is not enough to absorb the full magnetic flux, which squanders power of the magnet. If you install a neodymium to a weak sheet, the flux will pass right through and the holding will be smaller. To squeeze the maximum of this neodymium's potential, you require a sufficiently solid piece of steel. The saturation effect causes that on thin elements (e.g., car bodies), the holder shows lower pull force. We recommend selecting the steel thickness from these parameters.

Table 5: Working in heat (stability) - 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 pounds
1390.0 g / 13.6 N
 OK
40 °C -2.2% 1.36 kg / 3.00 pounds
1359.4 g / 13.3 N
 OK
60 °C -4.4% 1.33 kg / 2.93 pounds
1328.8 g / 13.0 N
80 °C -6.6% 1.30 kg / 2.86 pounds
1298.3 g / 12.7 N
100 °C -28.8% 0.99 kg / 2.18 pounds
989.7 g / 9.7 N
Standard neodymium magnets lose power past the thermal threshold. Watch out for overheating – heat can permanently demagnetize this magnet. As the temperature rises, the magnet's capacity temporarily decreases. Do not use this magnet near heat sources higher than its working range. Exceeding the critical threshold will lead to destruction of magnetism.
*Engineering note: Thermal stability is determined by both grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) risk losing magnetic properties sooner than taller cylinders. Red status in the table points to a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (repulsion) - field range
MW 12x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.68 kg / 5.90 pounds
3 435 Gs
0.40 kg / 0.88 pounds
401 g / 3.9 N
 N/A
1 mm 2.44 kg / 5.37 pounds
3 739 Gs
0.37 kg / 0.81 pounds
366 g / 3.6 N
 2.19 kg / 4.84 pounds
~0 Gs
2 mm 2.14 kg / 4.73 pounds
3 507 Gs
0.32 kg / 0.71 pounds
322 g / 3.2 N
 1.93 kg / 4.25 pounds
~0 Gs
3 mm 1.83 kg / 4.04 pounds
3 241 Gs
0.27 kg / 0.61 pounds
275 g / 2.7 N
 1.65 kg / 3.63 pounds
~0 Gs
5 mm 1.24 kg / 2.74 pounds
2 671 Gs
0.19 kg / 0.41 pounds
187 g / 1.8 N
 1.12 kg / 2.47 pounds
~0 Gs
10 mm 0.38 kg / 0.84 pounds
1 476 Gs
0.06 kg / 0.13 pounds
57 g / 0.6 N
 0.34 kg / 0.75 pounds
~0 Gs
20 mm 0.04 kg / 0.08 pounds
458 Gs
0.01 kg / 0.01 pounds
5 g / 0.1 N
 0.03 kg / 0.07 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
47 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
28 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
18 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
13 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
9 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
7 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two strong neodymiums interact from a wider radius than a neodymium and metal setup. Such a system of magnet-to-magnet produces a massive flux and a larger range of operation. Planning to create a powerful holder? Apply two magnets instead of a neodymium and a steel. Be careful that when bringing together two magnets, the impact force is huge. The repulsion force is a bit weaker than the connection force, but still impressive.
*Flux density between like poles reaches ~0 Gs in the exact middle of the gap (resulting from vector opposition).
Attention: Estimates demonstrate shear force of two identical neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Protective zones (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
Timepiece 20 Gs (2.0 mT) 3.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 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) 1.0 cm
Extremely neodym field is a large risk to IT equipment and medical implants. These neodymiums generate a field that prevents correct functioning of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and plastic. Special caution must be taken by people with hearing aids and drug dispensers. The risk also applies to: automatic timepieces, car keys, membranes, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (kinetic energy) - collision effects
MW 12x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 29.08 km/h
(8.08 m/s)
 0.06 J
30 mm 49.95 km/h
(13.88 m/s)
 0.16 J
50 mm 64.48 km/h
(17.91 m/s)
 0.27 J
100 mm 91.19 km/h
(25.33 m/s)
 0.55 J
Magnetic elements are delicate – a collision with steel can result in shattering. Watch the impact speed – a neodymium left loose speeds with massive force. Impact energy can trigger coating fragments or painful pinches to fingers. Always hold the magnet during bringing near metal so it doesn't hit with great force against the metal. A collision at high speed means shattering of the neodymium. Wear eye protection when working with large magnets.

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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MW 12x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 665 Mx 26.7 µWb
Pc Coefficient 0.25 Low (Flat)
Total magnetic flux emitted by the magnet pole. Key data when building generators and motors. Pc value defines the magnet's operating point.

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%
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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Sliding resistance

*Caution: On a vertical wall, the magnet retains only a fraction of its nominal pull.

2. Steel thickness impact

*Thin steel (e.g. computer case) drastically weakens the holding force.

3. Thermal stability

*For N38 grade, 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

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.

Engineering data and GPSR
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
Magnet Unit Converter
Force (pull)
Magnetic Field
Type data in one of the inputs, to see all other values will update automatically.

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This product is an extremely powerful cylindrical magnet, composed of advanced NdFeB material, which, at dimensions of Ø12x2 mm, guarantees the highest energy density. This specific item features high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 1.39 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 13.66 N with a weight of only 1.7 g, this rod 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 chipping the coating of this precision component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for the majority of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger 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 store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 2 mm. 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. 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 neodymium magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • Their magnetic field is maintained, and after around 10 years it decreases only by ~1% (theoretically),
  • They are resistant to demagnetization induced by external magnetic fields,
  • Thanks to the reflective finish, the layer of nickel, gold, or silver-plated gives an elegant appearance,
  • Magnetic induction on the working part of the magnet turns out to be impressive,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures approaching 230°C and above...
  • Thanks to flexibility in constructing and the ability to customize to complex applications,
  • Universal use in electronics industry – they serve a role in computer drives, electric drive systems, medical equipment, as well as industrial machines.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Weaknesses

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and 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 usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in producing threads and complicated forms in magnets, we propose using a housing - magnetic mount.
  • Possible danger related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small elements of these products are able to be problematic in diagnostics medical after entering the body.
  • Due to expensive raw materials, their price is higher than average,

Pull force analysis

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

The declared magnet strength refers to the peak performance, recorded under laboratory conditions, namely:
  • with the use of a sheet made of special test steel, guaranteeing maximum field concentration
  • whose thickness equals approx. 10 mm
  • with an polished contact surface
  • without any air gap between the magnet and steel
  • under vertical force direction (90-degree angle)
  • in neutral thermal conditions

What influences lifting capacity in practice

Holding efficiency is affected by working environment parameters, such as (from most important):
  • Gap (between the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to paint, corrosion or dirt).
  • Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Steel type – low-carbon steel attracts best. Higher carbon content decrease magnetic permeability and lifting capacity.
  • Surface quality – the smoother and more polished the surface, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Thermal environment – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.

Lifting capacity was assessed with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, in contrast under shearing force the load capacity is reduced by as much as 5 times. In addition, even a small distance between the magnet’s surface and the plate decreases the load capacity.

Warnings
Keep away from electronics

A strong magnetic field disrupts the functioning of compasses in phones and GPS navigation. Keep magnets near a device to prevent breaking the sensors.

Fragile material

Watch out for shards. Magnets can fracture upon uncontrolled impact, launching shards into the air. Eye protection is mandatory.

Dust explosion hazard

Combustion risk: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Finger safety

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

Sensitization to coating

It is widely known that nickel (the usual finish) is a potent allergen. If you have an allergy, refrain from touching magnets with bare hands and choose versions in plastic housing.

Electronic devices

Data protection: Strong magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).

Thermal limits

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Handling guide

Handle magnets with awareness. Their immense force can shock even experienced users. Plan your moves and do not underestimate their force.

No play value

NdFeB magnets are not toys. Eating multiple magnets may result in them attracting across intestines, which poses a critical condition and requires immediate surgery.

Medical implants

Life threat: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.

Security! Learn more about risks in the article: Safety of working with magnets.