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MW 2x4 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010055

GTIN/EAN: 5906301810544

5.00

Diameter Ø

2 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

0.09 g

Magnetization Direction

↑ axial

Load capacity

0.09 kg / 0.86 N

Magnetic Induction

597.70 mT / 5977 Gs

Coating

[NiCuNi] Nickel

0.209 with VAT / pcs + price for transport

0.1700 ZŁ net + 23% VAT / pcs

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Technical data of the product - MW 2x4 / N38 - cylindrical magnet

Specification / characteristics - MW 2x4 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010055
GTIN/EAN 5906301810544
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 2 mm [±0,1 mm]
Height 4 mm [±0,1 mm]
Weight 0.09 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.09 kg / 0.86 N
Magnetic Induction ~ ? 597.70 mT / 5977 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 2x4 / 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 assembly - technical parameters

These information represent the direct effect of a physical simulation. Values rely on algorithms for the class Nd2Fe14B. Operational conditions may differ from theoretical values. Treat these calculations as a reference point during assembly planning.

Table 1: Static force (pull vs gap) - interaction chart
MW 2x4 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5954 Gs
595.4 mT
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
weak grip
1 mm 1696 Gs
169.6 mT
0.01 kg / 0.02 pounds
7.3 g / 0.1 N
weak grip
2 mm 570 Gs
57.0 mT
0.00 kg / 0.00 pounds
0.8 g / 0.0 N
weak grip
3 mm 256 Gs
25.6 mT
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
weak grip
5 mm 82 Gs
8.2 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
10 mm 15 Gs
1.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
15 mm 5 Gs
0.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
20 mm 2 Gs
0.2 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

Table 2: Vertical capacity (vertical surface)
MW 2x4 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.02 kg / 0.04 pounds
18.0 g / 0.2 N
1 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
2 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 2x4 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.03 kg / 0.06 pounds
27.0 g / 0.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.02 kg / 0.04 pounds
18.0 g / 0.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.01 kg / 0.02 pounds
9.0 g / 0.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.05 kg / 0.10 pounds
45.0 g / 0.4 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 2x4 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.01 kg / 0.02 pounds
9.0 g / 0.1 N
1 mm
25%
0.02 kg / 0.05 pounds
22.5 g / 0.2 N
2 mm
50%
0.05 kg / 0.10 pounds
45.0 g / 0.4 N
3 mm
75%
0.07 kg / 0.15 pounds
67.5 g / 0.7 N
5 mm
100%
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
10 mm
100%
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
11 mm
100%
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
12 mm
100%
0.09 kg / 0.20 pounds
90.0 g / 0.9 N

Table 5: Thermal stability (stability) - thermal limit
MW 2x4 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.09 kg / 0.20 pounds
90.0 g / 0.9 N
OK
40 °C -2.2% 0.09 kg / 0.19 pounds
88.0 g / 0.9 N
OK
60 °C -4.4% 0.09 kg / 0.19 pounds
86.0 g / 0.8 N
OK
80 °C -6.6% 0.08 kg / 0.19 pounds
84.1 g / 0.8 N
100 °C -28.8% 0.06 kg / 0.14 pounds
64.1 g / 0.6 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 2x4 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.69 kg / 1.51 pounds
6 090 Gs
0.10 kg / 0.23 pounds
103 g / 1.0 N
N/A
1 mm 0.21 kg / 0.46 pounds
6 559 Gs
0.03 kg / 0.07 pounds
31 g / 0.3 N
0.19 kg / 0.41 pounds
~0 Gs
2 mm 0.06 kg / 0.12 pounds
3 391 Gs
0.01 kg / 0.02 pounds
8 g / 0.1 N
0.05 kg / 0.11 pounds
~0 Gs
3 mm 0.02 kg / 0.04 pounds
1 883 Gs
0.00 kg / 0.01 pounds
3 g / 0.0 N
0.02 kg / 0.03 pounds
~0 Gs
5 mm 0.00 kg / 0.01 pounds
743 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
10 mm 0.00 kg / 0.00 pounds
165 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
30 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
0 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

Table 7: Hazards (electronics) - precautionary measures
MW 2x4 / 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
Mechanical watch 20 Gs (2.0 mT) 1.0 cm
Mobile device 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

Table 8: Collisions (cracking risk) - warning
MW 2x4 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 31.89 km/h
(8.86 m/s)
0.00 J
30 mm 55.24 km/h
(15.34 m/s)
0.01 J
50 mm 71.31 km/h
(19.81 m/s)
0.02 J
100 mm 100.85 km/h
(28.01 m/s)
0.04 J

Table 9: Corrosion resistance
MW 2x4 / 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 2x4 / N38

Parameter Value SI Unit / Description
Magnetic Flux 209 Mx 2.1 µWb
Pc Coefficient 1.21 High (Stable)

Table 11: Hydrostatics and buoyancy
MW 2x4 / N38

Environment Effective steel pull Effect
Air (land) 0.09 kg Standard
Water (riverbed) 0.10 kg
(+0.01 kg buoyancy gain)
+14.5%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Sliding resistance

*Warning: On a vertical wall, the magnet holds just approx. 20-30% of its max power.

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) drastically weakens 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) = 1.21

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
Chemical composition
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: 010055-2026
Quick Unit Converter
Pulling force

Magnetic Field

Other proposals

The presented product is an exceptionally strong cylindrical magnet, made from modern NdFeB material, which, at dimensions of Ø2x4 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 0.09 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 0.86 N with a weight of only 0.09 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., 2.1 mm) using epoxy glues. 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 a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø2x4), 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 Ø2x4 mm, which, at a weight of 0.09 g, makes it an element with high magnetic energy density. The value of 0.86 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.09 g. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 4 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 and weaknesses of Nd2Fe14B magnets.

Advantages

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even during nearly 10 years – the drop in power is only ~1% (according to tests),
  • Magnets perfectly defend themselves against demagnetization caused by ambient magnetic noise,
  • Thanks to the glossy finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
  • Magnetic induction on the working layer of the magnet is strong,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to freedom in shaping and the ability to customize to specific needs,
  • Significant place in high-tech industry – they serve a role in magnetic memories, electric drive systems, precision medical tools, as well as other advanced devices.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Limitations

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise 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 stable to moisture, when using outdoors
  • Limited possibility of making nuts in the magnet and complicated forms - preferred is casing - magnet mounting.
  • Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these products are able to be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum magnetic pulling forcewhat contributes to it?

The lifting capacity listed is a measurement result conducted under the following configuration:
  • on a plate made of mild steel, effectively closing the magnetic field
  • whose thickness is min. 10 mm
  • characterized by even structure
  • with zero gap (without impurities)
  • during detachment in a direction vertical to the mounting surface
  • at conditions approx. 20°C

Practical aspects of lifting capacity – factors

In practice, the actual lifting capacity depends on several key aspects, listed from the most important:
  • Gap (betwixt the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Plate thickness – too thin steel does not close the flux, causing part of the power to be escaped to the other side.
  • Plate material – mild steel attracts best. Higher carbon content decrease magnetic permeability and holding force.
  • Smoothness – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was measured by applying a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the holding force is lower. In addition, even a small distance between the magnet and the plate reduces the lifting capacity.

Safe handling of NdFeB magnets
Bodily injuries

Big blocks can smash fingers instantly. Under no circumstances place your hand between two attracting surfaces.

Fire warning

Powder produced during cutting of magnets is combustible. Do not drill into magnets unless you are an expert.

Product not for children

NdFeB magnets are not suitable for play. Swallowing a few magnets may result in them connecting inside the digestive tract, which poses a severe health hazard and necessitates immediate surgery.

Respect the power

Handle magnets consciously. Their powerful strength can shock even experienced users. Stay alert and do not underestimate their force.

Impact on smartphones

A strong magnetic field disrupts the functioning of magnetometers in smartphones and navigation systems. Do not bring magnets close to a smartphone to prevent breaking the sensors.

Permanent damage

Avoid heat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).

Magnets are brittle

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

Data carriers

Equipment safety: Neodymium magnets can ruin payment cards and sensitive devices (pacemakers, hearing aids, mechanical watches).

Avoid contact if allergic

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If skin irritation occurs, cease handling magnets and use protective gear.

ICD Warning

Patients with a ICD must keep an safe separation from magnets. The magnetic field can disrupt the operation of the life-saving device.

Safety First! Looking for details? Check our post: Why are neodymium magnets dangerous?