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MW 3x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010065

GTIN/EAN: 5906301810643

5.00
Load capacity 0.20 kg / 1.95 N Magnetic Induction 598.96 mT / 5990 Gs
Diameter Ø
3 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
0.32 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

0.240net / pcs

0.295 zł with VAT (23% VAT) / pcs

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Gross
price from 1 pcs
0.240 zł
0.295 zł
price from 2500 pcs
0.226 zł
0.277 zł
price from 10500 pcs
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0.260 zł

Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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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 310 °C
Curie Temperature TF 590 °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 analysis of the assembly - report

These information represent the outcome of a mathematical analysis. Values rely on algorithms for the class Nd2Fe14B. Real-world conditions may differ. Use these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs distance) - interaction chart
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: Slippage force (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) - resistance threshold
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) - field collision
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: Safety (HSE) (implants) - 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
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: Dynamics (cracking risk) - warning
MW 3x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 10.03 km/h
(2.79 m/s)
0.00 J
30 mm 10.03 km/h
(2.79 m/s)
0.00 J
50 mm 10.03 km/h
(2.79 m/s)
0.00 J
100 mm 10.03 km/h
(2.79 m/s)
0.00 J

Table 9: Corrosion resistance
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: 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%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

1. Vertical hold

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

2. Efficiency vs thickness

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

3. Heat tolerance

*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.

Engineering data and GPSR

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%

Environmental data

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
Magnet Unit Converter

Pulling force


Magnetic Induction

Check out also offers

The presented product is an extremely powerful cylindrical magnet, made from advanced NdFeB material, which, with dimensions of Ø3x6 mm, guarantees maximum efficiency. The MW 3x6 / N38 model features high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with significant force (approx. 0.20 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 1.95 N with a weight of only 0.32 g, this cylindrical magnet is indispensable in electronics 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 precision component. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable for the majority of applications in modeling and machine building, where excessive 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 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 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.
This rod magnet 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.

Advantages as well as disadvantages of rare earth magnets.

Strengths

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • Their magnetic field remains stable, and after approximately ten years it decreases only by ~1% (theoretically),
  • They feature excellent resistance to magnetism drop due to external fields,
  • A magnet with a shiny silver surface has better aesthetics,
  • They feature high magnetic induction at the operating surface, which improves attraction properties,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • In view of the ability of accurate shaping and adaptation to individualized requirements, neodymium magnets can be created in a wide range of geometric configurations, which makes them more universal,
  • Huge importance in modern industrial fields – they are used in hard drives, electric drive systems, advanced medical instruments, and technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which allows their use in miniature devices

Weaknesses

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • We suggest casing - magnetic holder, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Possible danger to health – tiny shards of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these magnets are able to complicate diagnosis medical when they are in the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Breakaway strength of the magnet in ideal conditionswhat it depends on?

The specified lifting capacity represents the limit force, measured under ideal test conditions, meaning:
  • on a block made of mild steel, effectively closing the magnetic flux
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • characterized by lack of roughness
  • without the slightest air gap between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • in neutral thermal conditions

Practical lifting capacity: influencing factors

During everyday use, the actual lifting capacity results from several key aspects, presented from the most important:
  • Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Plate material – mild steel gives the best results. Alloy admixtures lower magnetic properties and holding force.
  • Base smoothness – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet and the plate reduces the holding force.

Warnings
Keep away from electronics

Be aware: neodymium magnets produce a field that confuses precision electronics. Keep a safe distance from your mobile, device, and navigation systems.

Respect the power

Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.

Eye protection

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

Skin irritation risks

Nickel alert: The Ni-Cu-Ni coating contains nickel. If an allergic reaction occurs, cease handling magnets and wear gloves.

Magnetic media

Device Safety: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, timepieces).

Serious injuries

Mind your fingers. Two large magnets will join instantly with a force of massive weight, destroying everything in their path. Be careful!

Permanent damage

Do not overheat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).

Warning for heart patients

Individuals with a heart stimulator should keep an safe separation from magnets. The magnetism can stop the operation of the implant.

Do not give to children

Always store magnets out of reach of children. Choking hazard is high, and the consequences of magnets clamping inside the body are tragic.

Dust is flammable

Combustion risk: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Safety First! Want to know more? Read our article: Why are neodymium magnets dangerous?