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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

0.1476 with VAT / pcs + price for transport

0.1200 ZŁ net + 23% VAT / pcs

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Technical parameters - 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 modeling of the assembly - technical parameters

These values represent the result of a engineering analysis. Results are based on algorithms for the material Nd2Fe14B. Operational conditions might slightly differ. Treat these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs gap) - 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 LBS
300.0 g / 2.9 N
low risk
1 mm 2106 Gs
210.6 mT
0.05 kg / 0.12 LBS
54.8 g / 0.5 N
low risk
2 mm 845 Gs
84.5 mT
0.01 kg / 0.02 LBS
8.8 g / 0.1 N
low risk
3 mm 393 Gs
39.3 mT
0.00 kg / 0.00 LBS
1.9 g / 0.0 N
low risk
5 mm 124 Gs
12.4 mT
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
low risk
10 mm 21 Gs
2.1 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
low risk
15 mm 7 Gs
0.7 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
low risk
20 mm 3 Gs
0.3 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
low risk
30 mm 1 Gs
0.1 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
low risk
50 mm 0 Gs
0.0 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
low risk

Table 2: Slippage load (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 LBS
60.0 g / 0.6 N
1 mm Stal (~0.2) 0.01 kg / 0.02 LBS
10.0 g / 0.1 N
2 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
3 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 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: Vertical assembly (shearing) - vertical pull
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 LBS
90.0 g / 0.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.06 kg / 0.13 LBS
60.0 g / 0.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.03 kg / 0.07 LBS
30.0 g / 0.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.15 kg / 0.33 LBS
150.0 g / 1.5 N

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 LBS
30.0 g / 0.3 N
1 mm
25%
0.08 kg / 0.17 LBS
75.0 g / 0.7 N
2 mm
50%
0.15 kg / 0.33 LBS
150.0 g / 1.5 N
3 mm
75%
0.22 kg / 0.50 LBS
225.0 g / 2.2 N
5 mm
100%
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
10 mm
100%
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
11 mm
100%
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
12 mm
100%
0.30 kg / 0.66 LBS
300.0 g / 2.9 N

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 LBS
300.0 g / 2.9 N
OK
40 °C -2.2% 0.29 kg / 0.65 LBS
293.4 g / 2.9 N
OK
60 °C -4.4% 0.29 kg / 0.63 LBS
286.8 g / 2.8 N
OK
80 °C -6.6% 0.28 kg / 0.62 LBS
280.2 g / 2.7 N
100 °C -28.8% 0.21 kg / 0.47 LBS
213.6 g / 2.1 N

Table 6: Two magnets (repulsion) - forces in the system
MW 3x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.06 kg / 2.33 LBS
5 766 Gs
0.16 kg / 0.35 LBS
159 g / 1.6 N
N/A
1 mm 0.49 kg / 1.08 LBS
6 712 Gs
0.07 kg / 0.16 LBS
74 g / 0.7 N
0.44 kg / 0.97 LBS
~0 Gs
2 mm 0.19 kg / 0.43 LBS
4 213 Gs
0.03 kg / 0.06 LBS
29 g / 0.3 N
0.17 kg / 0.38 LBS
~0 Gs
3 mm 0.08 kg / 0.17 LBS
2 629 Gs
0.01 kg / 0.02 LBS
11 g / 0.1 N
0.07 kg / 0.15 LBS
~0 Gs
5 mm 0.01 kg / 0.03 LBS
1 131 Gs
0.00 kg / 0.00 LBS
2 g / 0.0 N
0.01 kg / 0.03 LBS
~0 Gs
10 mm 0.00 kg / 0.00 LBS
248 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
20 mm 0.00 kg / 0.00 LBS
41 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
3 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
2 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
1 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
1 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
1 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
0 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
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
Mechanical watch 20 Gs (2.0 mT) 1.5 cm
Mobile device 40 Gs (4.0 mT) 1.0 cm
Remote 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 (kinetic energy) - warning
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

Table 9: Surface protection spec
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)

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)

Table 11: Hydrostatics and buoyancy
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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Vertical hold

*Note: On a vertical wall, the magnet holds merely a fraction of its nominal pull.

2. Steel saturation

*Thin metal sheet (e.g. computer case) significantly reduces the holding force.

3. Heat tolerance

*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) = 0.71

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.

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%
Sustainability
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
Magnet pull force

Field Strength

Other offers

The offered product is an incredibly powerful cylindrical magnet, manufactured from modern NdFeB material, which, with dimensions of Ø3x2 mm, guarantees the highest energy density. This specific item features an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 0.30 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 2.99 N with a weight of only 0.11 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. 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 available off-the-shelf 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 protects the surface against external factors, 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. 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 diametrically if your project requires it.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Pros

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They do not lose power, even after approximately 10 years – the drop in power is only ~1% (according to tests),
  • Magnets very well protect themselves against loss of magnetization caused by external fields,
  • In other words, due to the metallic surface of nickel, the element gains a professional look,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • 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...
  • In view of the ability of precise shaping and customization to specialized needs, magnetic components can be manufactured in a wide range of geometric configurations, which expands the range of possible applications,
  • Universal use in modern industrial fields – they serve a role in hard drives, brushless drives, precision medical tools, also multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in compact constructions

Cons

Disadvantages of NdFeB magnets:
  • At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and 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
  • 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 prevent oxidation and corrosion.
  • We suggest a housing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated shapes.
  • Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
  • With large orders the cost of neodymium magnets is a challenge,

Lifting parameters

Highest magnetic holding forcewhat it depends on?

Information about lifting capacity was defined for optimal configuration, including:
  • on a plate made of mild steel, effectively closing the magnetic flux
  • with a cross-section of at least 10 mm
  • with a surface cleaned and smooth
  • with zero gap (no paint)
  • for force applied at a right angle (in the magnet axis)
  • at temperature room level

Key elements affecting lifting force

Holding efficiency is affected by specific conditions, mainly (from most important):
  • Air gap (betwixt the magnet and the plate), since even a very small distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
  • Angle of force application – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Plate material – low-carbon steel attracts best. Alloy steels decrease magnetic properties and lifting capacity.
  • Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
  • Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Warnings
Risk of cracking

NdFeB magnets are ceramic materials, meaning they are very brittle. Impact of two magnets will cause them breaking into small pieces.

Electronic devices

Powerful magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Sensitization to coating

Studies show that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, avoid direct skin contact and opt for versions in plastic housing.

Physical harm

Big blocks can crush fingers in a fraction of a second. Do not place your hand between two strong magnets.

Caution required

Handle magnets with awareness. Their huge power can surprise even professionals. Be vigilant and do not underestimate their force.

Compass and GPS

GPS units and smartphones are extremely susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Pacemakers

People with a ICD must keep an absolute distance from magnets. The magnetic field can stop the operation of the life-saving device.

Maximum temperature

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

Do not give to children

Absolutely store magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are fatal.

Fire risk

Dust created during grinding of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Caution! More info about hazards in the article: Safety of working with magnets.