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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

Physical analysis of the assembly - report

The following data represent the result of a engineering analysis. Values were calculated on algorithms for the class Nd2Fe14B. Actual performance may differ from theoretical values. Treat these calculations as a supplementary guide for designers.

Table 1: Static force (pull 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: Sliding capacity (vertical surface)
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: Vertical assembly (sliding) - vertical pull
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 (saturation) - 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 (material behavior) - 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 (attraction) - 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) - 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
Timepiece 20 Gs (2.0 mT) 1.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.5 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: Impact energy (kinetic energy) - warning
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: Electrical data (Flux)
MW 3x6 / N38

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

Table 11: Underwater work (magnet fishing)
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

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

2. Efficiency vs thickness

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

3. Thermal stability

*For N38 material, the safety limit 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
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: 010065-2026
Measurement Calculator
Pulling force

Magnetic Field

Other offers

The presented product is an exceptionally strong cylinder magnet, composed of durable NdFeB material, which, at dimensions of Ø3x6 mm, guarantees the highest energy density. This specific item features high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 0.20 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 1.95 N with a weight of only 0.32 g, this rod 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 immediate cracking of this precision 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 industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest magnets in the same volume (Ø3x6), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf 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 defined 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.
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 diametrically if your project requires it.

Pros and cons of Nd2Fe14B magnets.

Strengths

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They do not lose power, even over nearly ten years – the decrease in power is only ~1% (based on measurements),
  • They are noted for resistance to demagnetization induced by presence of other magnetic fields,
  • Thanks to the shimmering finish, the plating of Ni-Cu-Ni, gold-plated, or silver-plated gives an modern appearance,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of individual machining and adjusting to individual applications,
  • Universal use in high-tech industry – they are used in data components, drive modules, diagnostic systems, and multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Cons

Problematic aspects of neodymium magnets: tips and applications.
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. 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 corrode. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We recommend casing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complicated shapes.
  • Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these devices can be problematic in diagnostics medical when they are in the body.
  • Due to neodymium price, their price exceeds standard values,

Lifting parameters

Optimal lifting capacity of a neodymium magnetwhat affects it?

The load parameter shown represents the peak performance, recorded under optimal environment, namely:
  • using a plate made of mild steel, serving as a magnetic yoke
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with a plane free of scratches
  • with zero gap (without coatings)
  • during pulling in a direction vertical to the mounting surface
  • at ambient temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

In real-world applications, the real power depends on several key aspects, listed 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.
  • Direction of force – maximum parameter is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be escaped into the air.
  • Material type – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
  • Thermal environment – heating the magnet results in weakening of force. Check the thermal limit for a given model.

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Finger safety

Danger of trauma: The attraction force is so great that it can result in blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Do not overheat magnets

Standard neodymium magnets (grade N) lose power when the temperature goes above 80°C. Damage is permanent.

Electronic hazard

Data protection: Neodymium magnets can ruin payment cards and delicate electronics (heart implants, medical aids, mechanical watches).

ICD Warning

Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.

Keep away from children

Always keep magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are life-threatening.

Metal Allergy

Some people experience a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact might lead to skin redness. We strongly advise wear protective gloves.

Magnets are brittle

Watch out for shards. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Handling guide

Before starting, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Combustion hazard

Powder produced during machining of magnets is self-igniting. Do not drill into magnets unless you are an expert.

GPS and phone interference

GPS units and smartphones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Danger! Want to know more? Check our post: Are neodymium magnets dangerous?