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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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Physical properties - 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 assembly - technical parameters

These values constitute the outcome of a engineering simulation. Results were calculated on models for the material Nd2Fe14B. Real-world conditions may differ from theoretical values. Treat these data as a supplementary guide during assembly planning.

Table 1: Static pull force (force vs gap) - interaction chart
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: Vertical capacity (vertical surface)
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: Wall mounting (shearing) - behavior on slippery surfaces
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) - sheet metal selection
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 (stability) - 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: Two magnets (attraction) - forces in the system
MW 16x4 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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) (electronics) - precautionary measures
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
Mobile device 40 Gs (4.0 mT) 3.5 cm
Car key 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: Impact energy (cracking risk) - 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 (Flux)
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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Wall mount (shear)

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

2. Efficiency vs thickness

*Thin steel (e.g. computer case) severely reduces the holding force.

3. Heat tolerance

*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) = 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
Chemical composition
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: 010034-2026
Magnet Unit Converter
Pulling force

Magnetic Field

Other deals

The offered product is an exceptionally strong rod magnet, composed of modern NdFeB material, which, at dimensions of Ø16x4 mm, guarantees the highest energy density. This specific item boasts a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 4.43 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its 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 field concentration on a small surface counts. Thanks to the high power of 43.46 N with a weight of only 6.03 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 chipping the coating of this precision component. To ensure stability in automation, 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 frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need even stronger 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 store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 16 mm and height 4 mm. The value of 43.46 N means that the magnet is capable of holding a weight many times exceeding its own mass of 6.03 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 16 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.

Strengths as well as weaknesses of neodymium magnets.

Advantages

Besides their durability, neodymium magnets are valued for these benefits:
  • They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (based on calculations),
  • Magnets perfectly defend themselves against demagnetization caused by external fields,
  • Thanks to the reflective finish, the coating of nickel, gold-plated, or silver-plated gives an clean appearance,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Thanks to flexibility in constructing and the ability to modify to specific needs,
  • Significant place in modern technologies – they serve a role in mass storage devices, brushless drives, advanced medical instruments, also multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in small systems

Limitations

What to avoid - cons of neodymium magnets: tips and applications.
  • Susceptibility to cracking 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 raises their durability
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability 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
  • Due to limitations in producing nuts and complex forms in magnets, we recommend using cover - magnetic mechanism.
  • Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
  • Due to expensive raw materials, their price is relatively high,

Pull force analysis

Best holding force of the magnet in ideal parameterswhat affects it?

The declared magnet strength represents the limit force, obtained under laboratory conditions, specifically:
  • using a plate made of low-carbon steel, serving as a circuit closing element
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • characterized by lack of roughness
  • without the slightest air gap between the magnet and steel
  • during detachment in a direction vertical to the plane
  • at room temperature

What influences lifting capacity in practice

Real force is affected by specific conditions, such as (from priority):
  • Air gap (betwixt the magnet and the plate), as even a very small distance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Material type – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
  • Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
  • Thermal environment – heating the magnet results in weakening of induction. Check the thermal limit for a given model.

Lifting capacity was determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

Safety rules for work with neodymium magnets
Magnetic media

Do not bring magnets close to a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Respect the power

Exercise caution. Neodymium magnets act from a distance and connect with massive power, often faster than you can react.

Combustion hazard

Mechanical processing of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Permanent damage

Keep cool. NdFeB magnets are susceptible to temperature. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).

Serious injuries

Big blocks can break fingers in a fraction of a second. Never place your hand betwixt two strong magnets.

Keep away from electronics

Be aware: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your phone, device, and GPS.

Nickel allergy

It is widely known that the nickel plating (standard magnet coating) is a potent allergen. For allergy sufferers, refrain from touching magnets with bare hands or choose encased magnets.

Choking Hazard

Always store magnets out of reach of children. Ingestion danger is high, and the effects of magnets clamping inside the body are life-threatening.

ICD Warning

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Magnets are brittle

Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Warning! Need more info? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98