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MW 3x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010064

GTIN/EAN: 5906301810636

5.00

Diameter Ø

3 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

0.11 g

Magnetization Direction

↑ axial

Load capacity

0.30 kg / 2.99 N

Magnetic Induction

493.99 mT / 4940 Gs

Coating

[NiCuNi] Nickel

check technical specifications »

0.1476 ZŁ with VAT / pcs + price for transport

0.1200 ZŁ net + 23% VAT / pcs

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Technical of the product - MW 3x2 / N38 - cylindrical magnet

Specification / characteristics - MW 3x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010064
GTIN/EAN 5906301810636
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 3 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 0.11 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.30 kg / 2.99 N
Magnetic Induction ~ ? 493.99 mT / 4940 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 3x2 / 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 analysis of the product - report

These values constitute the result of a engineering calculation. Values are based on models for the material Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these calculations as a reference point during assembly planning.

Table 1: Static force (force vs distance) - power drop
MW 3x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4928 Gs
492.8 mT
 0.30 kg / 0.66 pounds
300.0 g / 2.9 N
 weak grip
1 mm 2106 Gs
210.6 mT
 0.05 kg / 0.12 pounds
54.8 g / 0.5 N
 weak grip
2 mm 845 Gs
84.5 mT
 0.01 kg / 0.02 pounds
8.8 g / 0.1 N
 weak grip
3 mm 393 Gs
39.3 mT
 0.00 kg / 0.00 pounds
1.9 g / 0.0 N
 weak grip
5 mm 124 Gs
12.4 mT
 0.00 kg / 0.00 pounds
0.2 g / 0.0 N
 weak grip
10 mm 21 Gs
2.1 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
15 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
20 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
30 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
50 mm 0 Gs
0.0 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
Pulling power decreases drastically with every subsequent millimeter of spacing. Remember that even a microscopic distance (e.g., contamination, varnish, rust) significantly diminishes the holding power. Neodymiums hold optimally in perfect adhesion; gap kills the force. Analyze how rapidly the parameters fall, when the product does not adhere tightly to the steel surface. When planning the assembly, eliminate unnecessary gaps.

Table 2: Shear capacity (vertical surface)
MW 3x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.06 kg / 0.13 pounds
60.0 g / 0.6 N
1 mm Stal (~0.2) 0.01 kg / 0.02 pounds
10.0 g / 0.1 N
2 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
3 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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 indicates the theoretical shear load needed to start the sliding of the magnet vertically against a vertical steel plate (assuming standard friction coefficient). This parameter varies with the distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 3x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.06 kg / 0.13 pounds
60.0 g / 0.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.03 kg / 0.07 pounds
30.0 g / 0.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.15 kg / 0.33 pounds
150.0 g / 1.5 N
When mounting a element on a vertical plane (e.g., a car body), it will maintain barely approx. 20%-30% of its nominal power. Gravitational force as well as a weak degree of grip mean that products slide down faster than they pull off. Designing a hanger? Note that the sliding force is noticeably lower than the perpendicular breakaway force. On a painted metal, the element will slide down under a significantly smaller weight. Application of an anti-slip pad can effectively raise the stability.

Table 4: Steel thickness (substrate influence) - power losses
MW 3x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.03 kg / 0.07 pounds
30.0 g / 0.3 N
1 mm
25%
 0.08 kg / 0.17 pounds
75.0 g / 0.7 N
2 mm
50%
 0.15 kg / 0.33 pounds
150.0 g / 1.5 N
3 mm
75%
 0.22 kg / 0.50 pounds
225.0 g / 2.2 N
5 mm
100%
 0.30 kg / 0.66 pounds
300.0 g / 2.9 N
10 mm
100%
 0.30 kg / 0.66 pounds
300.0 g / 2.9 N
11 mm
100%
 0.30 kg / 0.66 pounds
300.0 g / 2.9 N
12 mm
100%
 0.30 kg / 0.66 pounds
300.0 g / 2.9 N
A too thin steel is incapable of take in the full magnetic flux, which squanders power of the magnet. If you attach a powerful product to a thin surface, the field will penetrate right through and the holding will be smaller. To squeeze the maximum of this neodymium's potential, you require a sufficiently solid element of steel. The material oversaturation means that on delicate walls (e.g., thin profiles), the product works worse. We recommend selecting the steel dimension according to the table below.

Table 5: Thermal stability (stability) - resistance threshold
MW 3x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.30 kg / 0.66 pounds
300.0 g / 2.9 N
 OK
40 °C -2.2% 0.29 kg / 0.65 pounds
293.4 g / 2.9 N
 OK
60 °C -4.4% 0.29 kg / 0.63 pounds
286.8 g / 2.8 N
 OK
80 °C -6.6% 0.28 kg / 0.62 pounds
280.2 g / 2.7 N
100 °C -28.8% 0.21 kg / 0.47 pounds
213.6 g / 2.1 N
Classic neodymiums change their properties power above the temperature limit. Protect against heat – excessive heat can permanently destroy this product. As the temperature rises, the neodymium's power temporarily drops. Avoid using this product close to heaters exceeding its working range. Ignoring the limit will lead to permanent loss of magnetic properties.
*Important note: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Thin magnets (low Pc) risk losing magnetic properties sooner than taller cylinders. Warning indicator in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - field range
MW 3x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.06 kg / 2.33 pounds
5 766 Gs
0.16 kg / 0.35 pounds
159 g / 1.6 N
 N/A
1 mm 0.49 kg / 1.08 pounds
6 712 Gs
0.07 kg / 0.16 pounds
74 g / 0.7 N
 0.44 kg / 0.97 pounds
~0 Gs
2 mm 0.19 kg / 0.43 pounds
4 213 Gs
0.03 kg / 0.06 pounds
29 g / 0.3 N
 0.17 kg / 0.38 pounds
~0 Gs
3 mm 0.08 kg / 0.17 pounds
2 629 Gs
0.01 kg / 0.02 pounds
11 g / 0.1 N
 0.07 kg / 0.15 pounds
~0 Gs
5 mm 0.01 kg / 0.03 pounds
1 131 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
 0.01 kg / 0.03 pounds
~0 Gs
10 mm 0.00 kg / 0.00 pounds
248 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
20 mm 0.00 kg / 0.00 pounds
41 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
3 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
2 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
1 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
1 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
1 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
0 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two magnetic products attract each other from a wider radius than a magnet and sheet combination. Such a system of two magnets generates a stronger field and a further horizon of performance. Planning to create a powerful holder? Utilize two neodymiums instead of a neodymium and a steel. Exercise caution that when bringing together two magnets, the impact force is extreme. The levitation is marginally weaker than the connection force, but still large.
*Flux density in repulsion mode is approximately ~0 Gs at the midpoint between the magnets (due to field cancellation).
Note: Calculations demonstrate sliding force of two same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - warnings
MW 3x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 2.0 cm
Hearing aid 10 Gs (1.0 mT) 1.5 cm
Timepiece 20 Gs (2.0 mT) 1.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.0 cm
Car key 50 Gs (5.0 mT) 1.0 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
Powerful magnet radiation is a serious hazard to IT equipment as well as medical implants. These NdFeB products generate a flux that prevents correct functioning of digital equipment. Remember: the invisible magnetic field penetrates the body and glass. Special caution must be taken by people with cochlear implants and insulin pumps. Also at risk are: automatic timepieces, car keys, membranes, and displays. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MW 3x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 52.67 km/h
(14.63 m/s)
 0.01 J
30 mm 91.22 km/h
(25.34 m/s)
 0.04 J
50 mm 117.77 km/h
(32.71 m/s)
 0.06 J
100 mm 166.55 km/h
(46.26 m/s)
 0.12 J
Neodymium magnets are prone to chipping – a collision with steel causes immediate chipping. Pay attention to connection velocity – a magnet released freely becomes dangerous. Impact energy can trigger coating fragments or injury to fingers. Be sure to control the product during installation so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear safety glasses when playing with powerful specimens.

Table 9: Coating parameters (durability)
MW 3x2 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MW 3x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 353 Mx 3.5 µWb
Pc Coefficient 0.71 High (Stable)
Total magnetic flux passing through the magnet pole. Essential parameter when building generators and motors. The Pc coefficient defines the magnet's operating point.

Table 11: Submerged application
MW 3x2 / N38

Environment Effective steel pull Effect
Air (land) 0.30 kg Standard
Water (riverbed) 0.34 kg
(+0.04 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!
Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Wall mount (shear)

*Warning: On a vertical surface, the magnet retains just a fraction of its nominal pull.

2. Efficiency vs thickness

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

3. Heat tolerance

*For N38 grade, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.71

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
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: 010064-2026
Quick Unit Converter
Force (pull)
Magnetic Field
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The presented product is an incredibly powerful cylinder magnet, produced from durable NdFeB material, which, at dimensions of Ø3x2 mm, guarantees optimal power. The MW 3x2 / N38 component is characterized by a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.30 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 2.99 N with a weight of only 0.11 g, this cylindrical magnet is indispensable in electronics 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., 3.1 mm) using epoxy glues. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø3x2), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
This model is characterized by dimensions Ø3x2 mm, which, at a weight of 0.11 g, makes it an element with high magnetic energy density. The value of 2.99 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.11 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 2 mm), which means that the N and S poles are located on the flat, circular surfaces. 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.

Advantages and disadvantages of neodymium magnets.

Benefits

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
  • They show high resistance to demagnetization induced by external magnetic fields,
  • Thanks to the reflective finish, the layer of Ni-Cu-Ni, gold, or silver gives an clean appearance,
  • Neodymium magnets create maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
  • Thanks to freedom in designing and the ability to adapt to individual projects,
  • Versatile presence in innovative solutions – they serve a role in data components, drive modules, diagnostic systems, as well as modern systems.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Limitations

What to avoid - cons 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 improves its resistance to damage
  • Neodymium magnets decrease their strength 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 durability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • Due to limitations in realizing nuts and complicated forms in magnets, we propose using a housing - magnetic holder.
  • Health risk resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these products can complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Detachment force of the magnet in optimal conditions – what contributes to it?

The lifting capacity listed is a measurement result executed under specific, ideal conditions:
  • with the application of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • with a surface free of scratches
  • under conditions of no distance (surface-to-surface)
  • under vertical force vector (90-degree angle)
  • at standard ambient temperature

Lifting capacity in real conditions – factors

In real-world applications, the actual lifting capacity depends on a number of factors, ranked from the most important:
  • Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Base massiveness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be escaped to the other side.
  • Material composition – not every steel attracts identically. High carbon content worsen the attraction effect.
  • Plate texture – ground elements ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under parallel forces the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.

H&S for magnets
Dust is flammable

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

Warning for heart patients

For implant holders: Powerful magnets affect electronics. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Magnetic interference

Remember: rare earth magnets produce a field that interferes with sensitive sensors. Maintain a separation from your phone, tablet, and navigation systems.

Thermal limits

Do not overheat. NdFeB magnets are sensitive to temperature. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).

Fragile material

Watch out for shards. Magnets can explode upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Danger to the youngest

Only for adults. Small elements can be swallowed, leading to serious injuries. Store away from kids and pets.

Nickel allergy

It is widely known that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, avoid touching magnets with bare hands and select coated magnets.

Electronic devices

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

Immense force

Exercise caution. Neodymium magnets act from a long distance and snap with huge force, often faster than you can move away.

Serious injuries

Large magnets can crush fingers instantly. Under no circumstances put your hand between two strong magnets.

Security! Need more info? Check our post: Are neodymium magnets dangerous?