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MW 16x4 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010034

GTIN/EAN: 5906301810339

5.00

Diameter Ø

16 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

6.03 g

Magnetization Direction

↑ axial

Load capacity

4.43 kg / 43.46 N

Magnetic Induction

277.14 mT / 2771 Gs

Coating

[NiCuNi] Nickel

3.39 with VAT / pcs + price for transport

2.76 ZŁ net + 23% VAT / pcs

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Technical specification - MW 16x4 / N38 - cylindrical magnet

Specification / characteristics - MW 16x4 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010034
GTIN/EAN 5906301810339
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 16 mm [±0,1 mm]
Height 4 mm [±0,1 mm]
Weight 6.03 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.43 kg / 43.46 N
Magnetic Induction ~ ? 277.14 mT / 2771 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 16x4 / 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 simulation of the product - data

Presented data represent the direct effect of a engineering simulation. Results are based on models for the material Nd2Fe14B. Actual performance might slightly differ from theoretical values. Please consider these calculations as a supplementary guide for designers.

Table 1: Static pull force (pull vs distance) - power drop
MW 16x4 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2771 Gs
277.1 mT
4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
warning
1 mm 2517 Gs
251.7 mT
3.66 kg / 8.06 lbs
3656.3 g / 35.9 N
warning
2 mm 2216 Gs
221.6 mT
2.83 kg / 6.25 lbs
2834.9 g / 27.8 N
warning
3 mm 1906 Gs
190.6 mT
2.10 kg / 4.62 lbs
2096.1 g / 20.6 N
warning
5 mm 1348 Gs
134.8 mT
1.05 kg / 2.31 lbs
1048.6 g / 10.3 N
low risk
10 mm 542 Gs
54.2 mT
0.17 kg / 0.37 lbs
169.4 g / 1.7 N
low risk
15 mm 244 Gs
24.4 mT
0.03 kg / 0.08 lbs
34.2 g / 0.3 N
low risk
20 mm 125 Gs
12.5 mT
0.01 kg / 0.02 lbs
9.1 g / 0.1 N
low risk
30 mm 45 Gs
4.5 mT
0.00 kg / 0.00 lbs
1.1 g / 0.0 N
low risk
50 mm 11 Gs
1.1 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
low risk

Table 2: Slippage force (wall)
MW 16x4 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.89 kg / 1.95 lbs
886.0 g / 8.7 N
1 mm Stal (~0.2) 0.73 kg / 1.61 lbs
732.0 g / 7.2 N
2 mm Stal (~0.2) 0.57 kg / 1.25 lbs
566.0 g / 5.6 N
3 mm Stal (~0.2) 0.42 kg / 0.93 lbs
420.0 g / 4.1 N
5 mm Stal (~0.2) 0.21 kg / 0.46 lbs
210.0 g / 2.1 N
10 mm Stal (~0.2) 0.03 kg / 0.07 lbs
34.0 g / 0.3 N
15 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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 (shearing) - vertical pull
MW 16x4 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.33 kg / 2.93 lbs
1329.0 g / 13.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.89 kg / 1.95 lbs
886.0 g / 8.7 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.44 kg / 0.98 lbs
443.0 g / 4.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.22 kg / 4.88 lbs
2215.0 g / 21.7 N

Table 4: Material efficiency (substrate influence) - power losses
MW 16x4 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.44 kg / 0.98 lbs
443.0 g / 4.3 N
1 mm
25%
1.11 kg / 2.44 lbs
1107.5 g / 10.9 N
2 mm
50%
2.22 kg / 4.88 lbs
2215.0 g / 21.7 N
3 mm
75%
3.32 kg / 7.32 lbs
3322.5 g / 32.6 N
5 mm
100%
4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
10 mm
100%
4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
11 mm
100%
4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
12 mm
100%
4.43 kg / 9.77 lbs
4430.0 g / 43.5 N

Table 5: Working in heat (material behavior) - thermal limit
MW 16x4 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.43 kg / 9.77 lbs
4430.0 g / 43.5 N
OK
40 °C -2.2% 4.33 kg / 9.55 lbs
4332.5 g / 42.5 N
OK
60 °C -4.4% 4.24 kg / 9.34 lbs
4235.1 g / 41.5 N
80 °C -6.6% 4.14 kg / 9.12 lbs
4137.6 g / 40.6 N
100 °C -28.8% 3.15 kg / 6.95 lbs
3154.2 g / 30.9 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 16x4 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 9.51 kg / 20.98 lbs
4 379 Gs
1.43 kg / 3.15 lbs
1427 g / 14.0 N
N/A
1 mm 8.72 kg / 19.23 lbs
5 306 Gs
1.31 kg / 2.88 lbs
1309 g / 12.8 N
7.85 kg / 17.31 lbs
~0 Gs
2 mm 7.85 kg / 17.31 lbs
5 034 Gs
1.18 kg / 2.60 lbs
1178 g / 11.6 N
7.07 kg / 15.58 lbs
~0 Gs
3 mm 6.96 kg / 15.35 lbs
4 740 Gs
1.04 kg / 2.30 lbs
1044 g / 10.2 N
6.27 kg / 13.81 lbs
~0 Gs
5 mm 5.26 kg / 11.60 lbs
4 121 Gs
0.79 kg / 1.74 lbs
789 g / 7.7 N
4.74 kg / 10.44 lbs
~0 Gs
10 mm 2.25 kg / 4.97 lbs
2 696 Gs
0.34 kg / 0.74 lbs
338 g / 3.3 N
2.03 kg / 4.47 lbs
~0 Gs
20 mm 0.36 kg / 0.80 lbs
1 083 Gs
0.05 kg / 0.12 lbs
55 g / 0.5 N
0.33 kg / 0.72 lbs
~0 Gs
50 mm 0.01 kg / 0.01 lbs
143 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.01 lbs
89 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
59 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
41 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
29 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
22 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 16x4 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 7.0 cm
Hearing aid 10 Gs (1.0 mT) 5.5 cm
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Collisions (kinetic energy) - warning
MW 16x4 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 27.98 km/h
(7.77 m/s)
0.18 J
30 mm 47.35 km/h
(13.15 m/s)
0.52 J
50 mm 61.12 km/h
(16.98 m/s)
0.87 J
100 mm 86.44 km/h
(24.01 m/s)
1.74 J

Table 9: Anti-corrosion coating durability
MW 16x4 / 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 16x4 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 192 Mx 61.9 µWb
Pc Coefficient 0.35 Low (Flat)

Table 11: Submerged application
MW 16x4 / N38

Environment Effective steel pull Effect
Air (land) 4.43 kg Standard
Water (riverbed) 5.07 kg
(+0.64 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Sliding resistance

*Caution: On a vertical surface, the magnet retains only approx. 20-30% of its max power.

2. Efficiency vs thickness

*Thin steel (e.g. computer case) drastically limits the holding force.

3. Thermal stability

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.35

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
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%
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: 010034-2026
Measurement Calculator
Magnet pull force

Field Strength

View also products

The presented product is an incredibly powerful rod magnet, produced from advanced NdFeB material, which, at dimensions of Ø16x4 mm, guarantees the highest energy density. This specific item features an accuracy of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 4.43 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 43.46 N with a weight of only 6.03 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure long-term durability 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 popular standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø16x4), 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 16 mm and height 4 mm. The key parameter here is the holding force amounting to approximately 4.43 kg (force ~43.46 N), which, with such compact dimensions, proves the high grade of the NdFeB material. 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 4 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 and disadvantages of Nd2Fe14B magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
  • They feature excellent resistance to weakening of magnetic properties when exposed to opposing magnetic fields,
  • By applying a lustrous layer of gold, the element has an proper look,
  • The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to flexibility in forming and the capacity to adapt to complex applications,
  • Wide application in high-tech industry – they find application in hard drives, motor assemblies, advanced medical instruments, also complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets and ways of using them
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power 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
  • They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We suggest casing - magnetic mount, due to difficulties in producing nuts inside the magnet and complex shapes.
  • Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. Furthermore, tiny parts of these devices can complicate diagnosis medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Pull force analysis

Maximum lifting capacity of the magnetwhat affects it?

The specified lifting capacity concerns the maximum value, obtained under optimal environment, meaning:
  • using a plate made of high-permeability steel, serving as a circuit closing element
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • with a surface cleaned and smooth
  • with direct contact (without impurities)
  • during detachment in a direction vertical to the mounting surface
  • in temp. approx. 20°C

Practical lifting capacity: influencing factors

In real-world applications, the real power depends on many variables, presented from most significant:
  • Air gap (betwixt the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Steel thickness – too thin sheet does not close the flux, causing part of the power to be escaped to the other side.
  • Metal type – not every steel attracts identically. Alloy additives weaken the attraction effect.
  • Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.

Safe handling of neodymium magnets
Precision electronics

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

Medical implants

Warning for patients: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.

Fragile material

Despite the nickel coating, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Fire risk

Powder created during grinding of magnets is combustible. Do not drill into magnets unless you are an expert.

Operating temperature

Standard neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Swallowing risk

Only for adults. Tiny parts pose a choking risk, leading to serious injuries. Store out of reach of kids and pets.

Electronic devices

Very strong magnetic fields can erase data on payment cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.

Handling guide

Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Be predictive.

Hand protection

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

Warning for allergy sufferers

Certain individuals have a contact allergy to Ni, which is the common plating for NdFeB magnets. Prolonged contact can result in an allergic reaction. We suggest wear protective gloves.

Important! Looking for details? Read our article: Are neodymium magnets dangerous?