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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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Product card - 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

Physical modeling of the magnet - technical parameters

These information constitute the outcome of a physical calculation. Results were calculated on models for the material Nd2Fe14B. Actual performance might slightly differ. Please consider these data as a supplementary guide during assembly planning.

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
safe
1 mm 2623 Gs
262.3 mT
0.04 kg / 0.09 LBS
38.6 g / 0.4 N
safe
2 mm 1134 Gs
113.4 mT
0.01 kg / 0.02 LBS
7.2 g / 0.1 N
safe
3 mm 570 Gs
57.0 mT
0.00 kg / 0.00 LBS
1.8 g / 0.0 N
safe
5 mm 205 Gs
20.5 mT
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
safe
10 mm 42 Gs
4.2 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
15 mm 15 Gs
1.5 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
20 mm 7 Gs
0.7 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
30 mm 2 Gs
0.2 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe

Table 2: Slippage hold (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 (sliding) - 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: Material efficiency (saturation) - sheet metal selection
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 stability (material behavior) - thermal limit
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 Force (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: Protective zones (electronics) - warnings
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: Hydrostatics and buoyancy
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%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Wall mount (shear)

*Warning: On a vertical surface, the magnet retains just approx. 20-30% of its nominal pull.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) drastically limits 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 specification and ecology
Elemental analysis
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

Field Strength

See also offers

This product is an incredibly powerful rod magnet, produced from modern NdFeB material, which, at dimensions of Ø3x6 mm, guarantees maximum efficiency. This specific item is characterized by an accuracy of ±0.1mm and professional build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 0.20 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 1.95 N with a weight of only 0.32 g, this rod 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., 3.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are strong enough 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 (Ø3x6), 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 Ø3x6 mm, which, at a weight of 0.32 g, makes it an element with impressive magnetic energy density. The value of 1.95 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.32 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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 3 mm. 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 through the diameter if your project requires it.

Pros as well as cons of rare earth magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (according to literature),
  • They maintain their magnetic properties even under external field action,
  • The use of an elegant layer of noble metals (nickel, gold, silver) causes the element to present itself better,
  • The surface of neodymium magnets generates a powerful magnetic field – this is a key feature,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
  • Thanks to modularity in designing and the capacity to modify to unusual requirements,
  • Versatile presence in high-tech industry – they find application in computer drives, motor assemblies, medical equipment, and complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which enables their usage in compact constructions

Cons

Disadvantages of NdFeB magnets:
  • At very strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of creating threads in the magnet and complex forms - preferred is a housing - magnet mounting.
  • Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these devices are able to complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum lifting capacity of the magnetwhat affects it?

The declared magnet strength refers to the maximum value, recorded under optimal environment, specifically:
  • on a block made of mild steel, perfectly concentrating the magnetic flux
  • possessing a thickness of minimum 10 mm to avoid saturation
  • characterized by even structure
  • under conditions of ideal adhesion (metal-to-metal)
  • under vertical application of breakaway force (90-degree angle)
  • at room temperature

What influences lifting capacity in practice

In practice, the real power results from many variables, ranked from most significant:
  • Distance (between the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, rust or dirt).
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
  • Base massiveness – insufficiently thick steel does not close the flux, causing part of the power to be escaped into the air.
  • Metal type – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
  • Smoothness – full contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
  • Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity was measured using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate reduces the load capacity.

H&S for magnets
Powerful field

Use magnets consciously. Their powerful strength can surprise even experienced users. Plan your moves and do not underestimate their power.

Do not give to children

Only for adults. Small elements can be swallowed, causing intestinal necrosis. Keep away from kids and pets.

Compass and GPS

A powerful magnetic field disrupts the functioning of magnetometers in phones and GPS navigation. Keep magnets near a device to avoid breaking the sensors.

Mechanical processing

Dust generated during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Serious injuries

Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Fragile material

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

Operating temperature

Monitor thermal conditions. Heating the magnet to high heat will destroy its properties and pulling force.

Safe distance

Equipment safety: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, hearing aids, timepieces).

Allergic reactions

It is widely known that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, avoid direct skin contact or choose coated magnets.

Danger to pacemakers

For implant holders: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.

Security! Details about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98