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MW 4x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010078

GTIN/EAN: 5906301810773

5.00

Diameter Ø

4 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

0.57 g

Magnetization Direction

↑ axial

Load capacity

0.41 kg / 4.06 N

Magnetic Induction

586.32 mT / 5863 Gs

Coating

[NiCuNi] Nickel

0.381 with VAT / pcs + price for transport

0.310 ZŁ net + 23% VAT / pcs

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Technical details - MW 4x6 / N38 - cylindrical magnet

Specification / characteristics - MW 4x6 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010078
GTIN/EAN 5906301810773
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 4 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 0.57 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.41 kg / 4.06 N
Magnetic Induction ~ ? 586.32 mT / 5863 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 4x6 / 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 analysis of the magnet - data

The following data constitute the direct effect of a mathematical calculation. Values are based on algorithms for the class Nd2Fe14B. Real-world parameters might slightly deviate from the simulation results. Use these data as a supplementary guide for designers.

Table 1: Static force (force vs gap) - characteristics
MW 4x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5852 Gs
585.2 mT
0.41 kg / 0.90 LBS
410.0 g / 4.0 N
safe
1 mm 3189 Gs
318.9 mT
0.12 kg / 0.27 LBS
121.7 g / 1.2 N
safe
2 mm 1631 Gs
163.1 mT
0.03 kg / 0.07 LBS
31.8 g / 0.3 N
safe
3 mm 894 Gs
89.4 mT
0.01 kg / 0.02 LBS
9.6 g / 0.1 N
safe
5 mm 343 Gs
34.3 mT
0.00 kg / 0.00 LBS
1.4 g / 0.0 N
safe
10 mm 73 Gs
7.3 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
safe
15 mm 26 Gs
2.6 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
20 mm 13 Gs
1.3 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
30 mm 4 Gs
0.4 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: Vertical load (wall)
MW 4x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.08 kg / 0.18 LBS
82.0 g / 0.8 N
1 mm Stal (~0.2) 0.02 kg / 0.05 LBS
24.0 g / 0.2 N
2 mm Stal (~0.2) 0.01 kg / 0.01 LBS
6.0 g / 0.1 N
3 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 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 4x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.12 kg / 0.27 LBS
123.0 g / 1.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.08 kg / 0.18 LBS
82.0 g / 0.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.09 LBS
41.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.21 kg / 0.45 LBS
205.0 g / 2.0 N

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

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.04 kg / 0.09 LBS
41.0 g / 0.4 N
1 mm
25%
0.10 kg / 0.23 LBS
102.5 g / 1.0 N
2 mm
50%
0.21 kg / 0.45 LBS
205.0 g / 2.0 N
3 mm
75%
0.31 kg / 0.68 LBS
307.5 g / 3.0 N
5 mm
100%
0.41 kg / 0.90 LBS
410.0 g / 4.0 N
10 mm
100%
0.41 kg / 0.90 LBS
410.0 g / 4.0 N
11 mm
100%
0.41 kg / 0.90 LBS
410.0 g / 4.0 N
12 mm
100%
0.41 kg / 0.90 LBS
410.0 g / 4.0 N

Table 5: Thermal stability (stability) - thermal limit
MW 4x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.41 kg / 0.90 LBS
410.0 g / 4.0 N
OK
40 °C -2.2% 0.40 kg / 0.88 LBS
401.0 g / 3.9 N
OK
60 °C -4.4% 0.39 kg / 0.86 LBS
392.0 g / 3.8 N
OK
80 °C -6.6% 0.38 kg / 0.84 LBS
382.9 g / 3.8 N
100 °C -28.8% 0.29 kg / 0.64 LBS
291.9 g / 2.9 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 4x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.65 kg / 5.85 LBS
6 085 Gs
0.40 kg / 0.88 LBS
398 g / 3.9 N
N/A
1 mm 1.51 kg / 3.34 LBS
8 844 Gs
0.23 kg / 0.50 LBS
227 g / 2.2 N
1.36 kg / 3.01 LBS
~0 Gs
2 mm 0.79 kg / 1.74 LBS
6 377 Gs
0.12 kg / 0.26 LBS
118 g / 1.2 N
0.71 kg / 1.56 LBS
~0 Gs
3 mm 0.40 kg / 0.88 LBS
4 541 Gs
0.06 kg / 0.13 LBS
60 g / 0.6 N
0.36 kg / 0.79 LBS
~0 Gs
5 mm 0.11 kg / 0.24 LBS
2 388 Gs
0.02 kg / 0.04 LBS
17 g / 0.2 N
0.10 kg / 0.22 LBS
~0 Gs
10 mm 0.01 kg / 0.02 LBS
687 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs
20 mm 0.00 kg / 0.00 LBS
145 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
14 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
8 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
5 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
4 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
3 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
2 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 4x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.0 cm
Hearing aid 10 Gs (1.0 mT) 2.5 cm
Timepiece 20 Gs (2.0 mT) 2.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Car key 50 Gs (5.0 mT) 1.5 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 4x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 27.05 km/h
(7.51 m/s)
0.02 J
30 mm 46.85 km/h
(13.01 m/s)
0.05 J
50 mm 60.48 km/h
(16.80 m/s)
0.08 J
100 mm 85.53 km/h
(23.76 m/s)
0.16 J

Table 9: Coating parameters (durability)
MW 4x6 / 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 (Pc)
MW 4x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 792 Mx 7.9 µWb
Pc Coefficient 1.09 High (Stable)

Table 11: Submerged application
MW 4x6 / N38

Environment Effective steel pull Effect
Air (land) 0.41 kg Standard
Water (riverbed) 0.47 kg
(+0.06 kg buoyancy gain)
+14.5%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

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

2. Efficiency vs thickness

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

3. Temperature resistance

*For N38 grade, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.09

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.

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: 010078-2026
Quick Unit Converter
Pulling force

Magnetic Induction

Other proposals

The offered product is a very strong cylinder magnet, produced from advanced NdFeB material, which, with dimensions of Ø4x6 mm, guarantees maximum efficiency. The MW 4x6 / N38 component is characterized by an accuracy of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 0.41 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 4.06 N with a weight of only 0.57 g, this rod is indispensable in miniature devices and wherever every gram matters.
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 long-term durability in automation, anaerobic resins 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 frequently chosen standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø4x6), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 4 mm and height 6 mm. The value of 4.06 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.57 g. 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. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Pros as well as cons of Nd2Fe14B magnets.

Benefits

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:
  • They retain magnetic properties for almost ten years – the drop is just ~1% (according to analyses),
  • They have excellent resistance to weakening of magnetic properties due to external fields,
  • In other words, due to the smooth layer of silver, the element gains a professional look,
  • Magnets exhibit maximum magnetic induction on the outer layer,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to modularity in constructing and the ability to modify to client solutions,
  • Huge importance in modern technologies – they serve a role in magnetic memories, drive modules, diagnostic systems, as well as complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in compact constructions

Weaknesses

Problematic aspects of neodymium magnets: tips and applications.
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength 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
  • Due to limitations in producing threads and complex shapes in magnets, we recommend using casing - magnetic mount.
  • Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical when they are in the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Holding force characteristics

Magnetic strength at its maximum – what affects it?

The specified lifting capacity represents the maximum value, obtained under laboratory conditions, specifically:
  • with the application of a yoke made of special test steel, ensuring maximum field concentration
  • whose thickness is min. 10 mm
  • characterized by lack of roughness
  • with zero gap (no impurities)
  • for force applied at a right angle (pull-off, not shear)
  • in neutral thermal conditions

Lifting capacity in real conditions – factors

Holding efficiency is affected by specific conditions, including (from most important):
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Plate material – mild steel attracts best. Alloy admixtures decrease magnetic properties and holding force.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Warning for allergy sufferers

Some people experience a sensitization to nickel, which is the common plating for NdFeB magnets. Extended handling may cause an allergic reaction. It is best to use protective gloves.

Adults only

Only for adults. Tiny parts can be swallowed, causing serious injuries. Keep away from kids and pets.

Powerful field

Handle magnets with awareness. Their powerful strength can shock even experienced users. Stay alert and respect their force.

Danger to pacemakers

For implant holders: Powerful magnets affect medical devices. Keep minimum 30 cm distance or request help to work with the magnets.

Fire risk

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

Data carriers

Avoid bringing magnets close to a purse, computer, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Magnet fragility

NdFeB magnets are ceramic materials, which means they are prone to chipping. Impact of two magnets will cause them breaking into shards.

Serious injuries

Large magnets can crush fingers in a fraction of a second. Do not put your hand between two strong magnets.

Phone sensors

An intense magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Maintain magnets near a smartphone to avoid breaking the sensors.

Do not overheat magnets

Regular neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

Important! Learn more 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