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MW 3x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010065

GTIN/EAN: 5906301810643

5.00

Diameter Ø

3 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

0.32 g

Magnetization Direction

↑ axial

Load capacity

0.20 kg / 1.95 N

Magnetic Induction

598.96 mT / 5990 Gs

Coating

[NiCuNi] Nickel

0.295 with VAT / pcs + price for transport

0.240 ZŁ net + 23% VAT / pcs

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Technical details - MW 3x6 / N38 - cylindrical magnet

Specification / characteristics - MW 3x6 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010065
GTIN/EAN 5906301810643
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 6 mm [±0,1 mm]
Weight 0.32 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.20 kg / 1.95 N
Magnetic Induction ~ ? 598.96 mT / 5990 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 3x6 / 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 modeling of the assembly - data

The following data constitute the outcome of a physical analysis. Results are based on algorithms for the class Nd2Fe14B. Operational parameters might slightly differ. Please consider these data as a reference point when designing systems.

Table 1: Static pull force (force vs gap) - characteristics
MW 3x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5974 Gs
597.4 mT
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
weak grip
1 mm 2623 Gs
262.3 mT
0.04 kg / 0.09 lbs
38.6 g / 0.4 N
weak grip
2 mm 1134 Gs
113.4 mT
0.01 kg / 0.02 lbs
7.2 g / 0.1 N
weak grip
3 mm 570 Gs
57.0 mT
0.00 kg / 0.00 lbs
1.8 g / 0.0 N
weak grip
5 mm 205 Gs
20.5 mT
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
weak grip
10 mm 42 Gs
4.2 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
15 mm 15 Gs
1.5 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
20 mm 7 Gs
0.7 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
30 mm 2 Gs
0.2 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip

Table 2: Vertical load (wall)
MW 3x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.04 kg / 0.09 lbs
40.0 g / 0.4 N
1 mm Stal (~0.2) 0.01 kg / 0.02 lbs
8.0 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: Wall mounting (shearing) - behavior on slippery surfaces
MW 3x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.06 kg / 0.13 lbs
60.0 g / 0.6 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.04 kg / 0.09 lbs
40.0 g / 0.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.02 kg / 0.04 lbs
20.0 g / 0.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.10 kg / 0.22 lbs
100.0 g / 1.0 N

Table 4: Steel thickness (substrate influence) - power losses
MW 3x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.02 kg / 0.04 lbs
20.0 g / 0.2 N
1 mm
25%
0.05 kg / 0.11 lbs
50.0 g / 0.5 N
2 mm
50%
0.10 kg / 0.22 lbs
100.0 g / 1.0 N
3 mm
75%
0.15 kg / 0.33 lbs
150.0 g / 1.5 N
5 mm
100%
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
10 mm
100%
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
11 mm
100%
0.20 kg / 0.44 lbs
200.0 g / 2.0 N
12 mm
100%
0.20 kg / 0.44 lbs
200.0 g / 2.0 N

Table 5: Thermal resistance (stability) - power drop
MW 3x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.20 kg / 0.44 lbs
200.0 g / 2.0 N
OK
40 °C -2.2% 0.20 kg / 0.43 lbs
195.6 g / 1.9 N
OK
60 °C -4.4% 0.19 kg / 0.42 lbs
191.2 g / 1.9 N
OK
80 °C -6.6% 0.19 kg / 0.41 lbs
186.8 g / 1.8 N
100 °C -28.8% 0.14 kg / 0.31 lbs
142.4 g / 1.4 N

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 3x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.56 kg / 3.43 lbs
6 111 Gs
0.23 kg / 0.51 lbs
233 g / 2.3 N
N/A
1 mm 0.73 kg / 1.60 lbs
8 161 Gs
0.11 kg / 0.24 lbs
109 g / 1.1 N
0.65 kg / 1.44 lbs
~0 Gs
2 mm 0.30 kg / 0.66 lbs
5 246 Gs
0.04 kg / 0.10 lbs
45 g / 0.4 N
0.27 kg / 0.60 lbs
~0 Gs
3 mm 0.13 kg / 0.28 lbs
3 391 Gs
0.02 kg / 0.04 lbs
19 g / 0.2 N
0.11 kg / 0.25 lbs
~0 Gs
5 mm 0.03 kg / 0.06 lbs
1 578 Gs
0.00 kg / 0.01 lbs
4 g / 0.0 N
0.02 kg / 0.05 lbs
~0 Gs
10 mm 0.00 kg / 0.00 lbs
409 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
83 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
8 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
5 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
3 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
2 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
2 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
1 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Hazards (electronics) - precautionary measures
MW 3x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 2.5 cm
Hearing aid 10 Gs (1.0 mT) 2.0 cm
Mechanical watch 20 Gs (2.0 mT) 1.5 cm
Mobile device 40 Gs (4.0 mT) 1.5 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: Impact energy (kinetic energy) - collision effects
MW 3x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 25.21 km/h
(7.00 m/s)
0.01 J
30 mm 43.67 km/h
(12.13 m/s)
0.02 J
50 mm 56.38 km/h
(15.66 m/s)
0.04 J
100 mm 79.73 km/h
(22.15 m/s)
0.08 J

Table 9: Surface protection spec
MW 3x6 / 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 3x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 470 Mx 4.7 µWb
Pc Coefficient 1.21 High (Stable)

Table 11: Submerged application
MW 3x6 / N38

Environment Effective steel pull Effect
Air (land) 0.20 kg Standard
Water (riverbed) 0.23 kg
(+0.03 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

*Caution: On a vertical wall, the magnet retains only approx. 20-30% of its nominal pull.

2. Steel thickness impact

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

3. Power loss vs temp

*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) = 1.21

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 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: 010065-2026
Measurement Calculator
Magnet pull force

Magnetic Field

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The presented product is a very strong cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø3x6 mm, guarantees maximum efficiency. The MW 3x6 / N38 model is characterized by 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. 0.20 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 1.95 N with a weight of only 0.32 g, this cylindrical magnet 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.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need even stronger magnets in the same volume (Ø3x6), 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 3 mm and height 6 mm. The key parameter here is the holding force amounting to approximately 0.20 kg (force ~1.95 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 6 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.

Strengths as well as weaknesses of rare earth magnets.

Advantages

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • They feature excellent resistance to magnetism drop due to external fields,
  • The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Magnets have huge magnetic induction on the surface,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to modularity in constructing and the capacity to customize to specific needs,
  • Versatile presence in high-tech industry – they are utilized in hard drives, brushless drives, precision medical tools, also multitasking production systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets and ways of using them
  • At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power 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
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited ability of making threads in the magnet and complex forms - recommended is cover - magnet mounting.
  • Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Furthermore, small components of these devices can complicate diagnosis medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Magnetic strength at its maximum – what contributes to it?

The load parameter shown refers to the maximum value, obtained under ideal test conditions, specifically:
  • on a plate made of structural steel, perfectly concentrating the magnetic field
  • with a cross-section of at least 10 mm
  • with an polished touching surface
  • under conditions of no distance (surface-to-surface)
  • during pulling in a direction perpendicular to the mounting surface
  • at temperature room level

Magnet lifting force in use – key factors

During everyday use, the actual holding force results from several key aspects, ranked from the most important:
  • Distance – existence of any layer (rust, dirt, gap) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material type – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
  • Plate texture – ground elements ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Safe handling of NdFeB magnets
GPS Danger

Remember: neodymium magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your phone, tablet, and navigation systems.

Immense force

Handle magnets consciously. Their powerful strength can surprise even professionals. Stay alert and respect their force.

Sensitization to coating

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If skin irritation appears, immediately stop handling magnets and wear gloves.

Medical implants

Patients with a pacemaker have to keep an absolute distance from magnets. The magnetism can disrupt the operation of the implant.

Safe distance

Do not bring magnets close to a purse, computer, or screen. The magnetism can destroy these devices and erase data from cards.

Crushing force

Pinching hazard: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Mechanical processing

Machining of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Permanent damage

Avoid heat. NdFeB magnets are susceptible to heat. If you need operation above 80°C, inquire about HT versions (H, SH, UH).

Beware of splinters

Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

No play value

Absolutely store magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are fatal.

Caution! More info about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98