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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

product parameters »

0.295 ZŁ with VAT / pcs + price for transport

0.240 ZŁ net + 23% VAT / pcs

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Technical data of the product - 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 assembly - technical parameters

Presented values represent the result of a physical calculation. Results rely on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ. Please consider these data as a reference point during assembly planning.

Table 1: Static pull force (pull vs gap) - 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
 low risk
1 mm 2623 Gs
262.3 mT
 0.04 kg / 0.09 LBS
38.6 g / 0.4 N
 low risk
2 mm 1134 Gs
113.4 mT
 0.01 kg / 0.02 LBS
7.2 g / 0.1 N
 low risk
3 mm 570 Gs
57.0 mT
 0.00 kg / 0.00 LBS
1.8 g / 0.0 N
 low risk
5 mm 205 Gs
20.5 mT
 0.00 kg / 0.00 LBS
0.2 g / 0.0 N
 low risk
10 mm 42 Gs
4.2 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
15 mm 15 Gs
1.5 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
20 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
30 mm 2 Gs
0.2 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
50 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
Pulling power drops sharply per each millimeter of distance. Keep in mind that even a very thin break (e.g., contamination, paint, rust) significantly reduces the pull force. Magnets work optimally at the point of direct contact; distance nullifies the power. Analyze how quickly the parameters drop, when the product does not touch flatly to the steel surface. When planning the arrangement, eliminate redundant distances.

Table 2: Sliding load (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
This section shows the approximate shear load necessary to cause the shifting of the magnet down along a vertical steel plate (assuming typical friction). This value is relative to the gap size between the magnet and the surface.

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
When hanging a magnet on a vertical wall (e.g., a fridge), it will only hold just approx. 1/5 of its nominal power. Gravity and a low friction coefficient influence the fact that products slide down easier than they pop off the substrate. Planning a vertical fastening? Consider that the sliding force is noticeably lower than the maximum static pull force. On a slippery surface, the holder will slip down under a much lighter load. Utilizing a rubberized layer can drastically raise the stability.

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
A thin sheet is incapable of conduct the full magnetic flux, which squanders power of the magnet. Should you mount a strong magnet to a thin surface, the magnetism will penetrate right through and the attraction force will be weaker. To squeeze the maximum of this neodymium's power, you require a sufficiently solid piece of metal. The material oversaturation means that on sheet metal structures (e.g., thin profiles), the magnet shows lower pull force. We recommend selecting the steel dimension based on the following data.

Table 5: Working in heat (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
Ordinary NdFeB products lose strength past the thermal threshold. Avoid high temperatures – heat can irreversibly destroy this magnet. With increasing heat, the neodymium's power briefly drops. Do not use this magnet in hot environments exceeding its safe range. Ignoring the limit will result in destruction of magnetic properties.
*Technical advisory: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low Pc) risk losing magnetic properties under lower heat stress compared to rod magnets. Warning indicator in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field range
MW 3x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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
Two magnets interact from a significantly greater distance than a magnet and steel setup. The setup of magnet-to-magnet produces a massive flux and a further horizon of operation. Designing a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Be careful that when attracting two neodymiums, the impact force is huge. The repulsion force is marginally weaker than the connection force, but still impressive.
*The magnetic induction in repulsion mode drops to ~0 Gs in the exact middle of the gap (due to field cancellation).
Note: Results show friction force of two identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - 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
Timepiece 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
Extremely neodym field poses a large risk to electronics and pacemakers. These NdFeB products generate a field that disrupts operation of sensitive medical devices. Be aware: the unseen radiation acts through matter and plastic. Exceptional care must be taken by people with hearing aids and drug dispensers. The risk also applies to: mechanical watches, car keys, speakers, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - 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
Magnetic elements are prone to chipping – a strong collision with metal causes immediate chipping. Control the attraction moment – a neodymium left loose speeds with massive force. Kinetic force can cause material chips or painful pinches to skin. Hold the magnet firmly during bringing near metal so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear eye protection when handling with powerful specimens.

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)
The following table defines the conditions under which this product can be safely used. Improper coating selection is the most common cause of magnet failure over time.

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)
Flux value emitted by the pole surface. Key data in coil applications as well as sensors. Pc value defines the magnet's operating point.

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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.
1. Sliding resistance

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

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) severely limits the holding force.

3. Power loss vs temp

*For standard magnets, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.21

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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%
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
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The offered product is an incredibly powerful cylinder magnet, composed of advanced NdFeB material, which, at dimensions of Ø3x6 mm, guarantees optimal power. The MW 3x6 / N38 model boasts high dimensional repeatability and industrial build quality, making it an ideal 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 lightning-fast order fulfillment. Furthermore, 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 sensors, and efficient magnetic separators, 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 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 immediate cracking of this professional component. To ensure stability 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.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. 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 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 grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface 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.

Pros

Besides their immense pulling force, neodymium magnets offer the following advantages:
  • Their strength is maintained, and after around ten years it drops only by ~1% (theoretically),
  • Neodymium magnets remain extremely resistant to demagnetization caused by external interference,
  • Thanks to the shiny finish, the layer of Ni-Cu-Ni, gold-plated, or silver-plated gives an aesthetic appearance,
  • Neodymium magnets achieve maximum magnetic induction on a small area, which ensures high operational effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to modularity in constructing and the ability to modify to client solutions,
  • Huge importance in high-tech industry – they are utilized in magnetic memories, electric drive systems, medical devices, also multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited ability of making threads in the magnet and complex shapes - preferred is a housing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the context of child health protection. Furthermore, small components of these products are able to disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum magnetic pulling force – what contributes to it?

The force parameter is a theoretical maximum value performed under standard conditions:
  • using a sheet made of low-carbon steel, serving as a ideal flux conductor
  • whose thickness is min. 10 mm
  • with a surface free of scratches
  • without the slightest air gap between the magnet and steel
  • under axial force direction (90-degree angle)
  • at conditions approx. 20°C

Lifting capacity in practice – influencing factors

Real force impacted by working environment parameters, mainly (from priority):
  • Gap between magnet and steel – every millimeter of separation (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Load vector – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Plate material – mild steel attracts best. Alloy admixtures decrease magnetic properties and holding force.
  • Smoothness – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature influence – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under shearing force the holding force is lower. Additionally, even a small distance between the magnet’s surface and the plate lowers the load capacity.

Warnings
Heat sensitivity

Watch the temperature. Heating the magnet to high heat will destroy its properties and strength.

Pinching danger

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

Material brittleness

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

Fire risk

Dust produced during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.

Impact on smartphones

Navigation devices and smartphones are highly susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Immense force

Handle magnets consciously. Their immense force can shock even experienced users. Be vigilant and respect their power.

Implant safety

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

Avoid contact if allergic

Studies show that nickel (standard magnet coating) is a common allergen. If your skin reacts to metals, prevent direct skin contact and select versions in plastic housing.

Magnetic media

Powerful magnetic fields can destroy records on payment cards, HDDs, and storage devices. Stay away of min. 10 cm.

Danger to the youngest

These products are not suitable for play. Swallowing a few magnets may result in them attracting across intestines, which constitutes a critical condition and necessitates urgent medical intervention.

Security! Want to know more? Read our article: Are neodymium magnets dangerous?