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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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Detailed specification - 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 modeling of the product - report

Presented data are the direct effect of a engineering analysis. Values were calculated on models for the material Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Treat these calculations as a reference point during assembly planning.

Table 1: Static pull force (pull vs distance) - 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 hold (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 (shearing) - vertical pull
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 (saturation) - sheet metal selection
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: Two magnets (repulsion) - field range
MW 4x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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: Safety (HSE) (implants) - warnings
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
Remote 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: Collisions (kinetic energy) - collision effects
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: Corrosion resistance
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: Hydrostatics and buoyancy
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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Shear force

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

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.

3. Temperature resistance

*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) = 1.09

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
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%
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
Magnet pull force

Magnetic Field

Other offers

The offered product is an exceptionally strong cylinder magnet, manufactured from durable NdFeB material, which, at dimensions of Ø4x6 mm, guarantees optimal power. This specific item features high dimensional repeatability and industrial build quality, making it an ideal solution for professional 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 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.
This model is perfect for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where field concentration 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 electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 4.1 mm) using 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 durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and operational stability. 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 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 4 mm. 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

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They do not lose strength, even over nearly 10 years – the reduction in power is only ~1% (based on measurements),
  • They are resistant to demagnetization induced by external disturbances,
  • Thanks to the metallic finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
  • Magnets are distinguished by maximum magnetic induction on the active area,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures reaching 230°C and above...
  • Thanks to modularity in constructing and the ability to adapt to specific needs,
  • Universal use in future technologies – they are used in HDD drives, electric drive systems, diagnostic systems, also industrial machines.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as 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 while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited ability of making nuts in the magnet and complex shapes - recommended is a housing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Highest magnetic holding forcewhat affects it?

Magnet power was defined for the most favorable conditions, assuming:
  • using a base made of mild steel, serving as a magnetic yoke
  • whose thickness reaches at least 10 mm
  • with an ideally smooth contact surface
  • under conditions of gap-free contact (surface-to-surface)
  • during pulling in a direction perpendicular to the mounting surface
  • at conditions approx. 20°C

Magnet lifting force in use – key factors

In practice, the real power results from many variables, listed from crucial:
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Metal type – different alloys reacts the same. Alloy additives weaken the attraction effect.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet and the plate lowers the load capacity.

Warnings
Protect data

Intense magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Material brittleness

NdFeB magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets leads to them shattering into small pieces.

Swallowing risk

Adult use only. Small elements can be swallowed, causing intestinal necrosis. Keep away from kids and pets.

Power loss in heat

Avoid heat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).

Impact on smartphones

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

Bone fractures

Big blocks can crush fingers in a fraction of a second. Under no circumstances put your hand between two strong magnets.

Machining danger

Powder generated during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Caution required

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

Danger to pacemakers

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

Sensitization to coating

Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, cease handling magnets and wear gloves.

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