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MW 16x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010033

GTIN/EAN: 5906301810322

5.00

Diameter Ø

16 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

4.52 g

Magnetization Direction

↑ axial

Load capacity

2.97 kg / 29.11 N

Magnetic Induction

217.61 mT / 2176 Gs

Coating

[NiCuNi] Nickel

1.734 with VAT / pcs + price for transport

1.410 ZŁ net + 23% VAT / pcs

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Detailed specification - MW 16x3 / N38 - cylindrical magnet

Specification / characteristics - MW 16x3 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010033
GTIN/EAN 5906301810322
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 3 mm [±0,1 mm]
Weight 4.52 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.97 kg / 29.11 N
Magnetic Induction ~ ? 217.61 mT / 2176 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 16x3 / 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

Technical simulation of the product - report

These information constitute the direct effect of a physical analysis. Results were calculated on models for the material Nd2Fe14B. Actual performance may differ from theoretical values. Treat these data as a preliminary roadmap when designing systems.

Table 1: Static force (pull vs gap) - interaction chart
MW 16x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2176 Gs
217.6 mT
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
warning
1 mm 2004 Gs
200.4 mT
2.52 kg / 5.55 pounds
2519.3 g / 24.7 N
warning
2 mm 1782 Gs
178.2 mT
1.99 kg / 4.39 pounds
1993.2 g / 19.6 N
low risk
3 mm 1543 Gs
154.3 mT
1.49 kg / 3.29 pounds
1494.0 g / 14.7 N
low risk
5 mm 1098 Gs
109.8 mT
0.76 kg / 1.67 pounds
756.6 g / 7.4 N
low risk
10 mm 439 Gs
43.9 mT
0.12 kg / 0.27 pounds
120.9 g / 1.2 N
low risk
15 mm 195 Gs
19.5 mT
0.02 kg / 0.05 pounds
23.9 g / 0.2 N
low risk
20 mm 99 Gs
9.9 mT
0.01 kg / 0.01 pounds
6.2 g / 0.1 N
low risk
30 mm 35 Gs
3.5 mT
0.00 kg / 0.00 pounds
0.8 g / 0.0 N
low risk
50 mm 8 Gs
0.8 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
low risk

Table 2: Shear load (wall)
MW 16x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.59 kg / 1.31 pounds
594.0 g / 5.8 N
1 mm Stal (~0.2) 0.50 kg / 1.11 pounds
504.0 g / 4.9 N
2 mm Stal (~0.2) 0.40 kg / 0.88 pounds
398.0 g / 3.9 N
3 mm Stal (~0.2) 0.30 kg / 0.66 pounds
298.0 g / 2.9 N
5 mm Stal (~0.2) 0.15 kg / 0.34 pounds
152.0 g / 1.5 N
10 mm Stal (~0.2) 0.02 kg / 0.05 pounds
24.0 g / 0.2 N
15 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 16x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.89 kg / 1.96 pounds
891.0 g / 8.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.59 kg / 1.31 pounds
594.0 g / 5.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.30 kg / 0.65 pounds
297.0 g / 2.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.49 kg / 3.27 pounds
1485.0 g / 14.6 N

Table 4: Material efficiency (saturation) - power losses
MW 16x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.30 kg / 0.65 pounds
297.0 g / 2.9 N
1 mm
25%
0.74 kg / 1.64 pounds
742.5 g / 7.3 N
2 mm
50%
1.49 kg / 3.27 pounds
1485.0 g / 14.6 N
3 mm
75%
2.23 kg / 4.91 pounds
2227.5 g / 21.9 N
5 mm
100%
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
10 mm
100%
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
11 mm
100%
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
12 mm
100%
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N

Table 5: Working in heat (material behavior) - power drop
MW 16x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
OK
40 °C -2.2% 2.90 kg / 6.40 pounds
2904.7 g / 28.5 N
OK
60 °C -4.4% 2.84 kg / 6.26 pounds
2839.3 g / 27.9 N
80 °C -6.6% 2.77 kg / 6.12 pounds
2774.0 g / 27.2 N
100 °C -28.8% 2.11 kg / 4.66 pounds
2114.6 g / 20.7 N

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 16x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 5.87 kg / 12.93 pounds
3 716 Gs
0.88 kg / 1.94 pounds
880 g / 8.6 N
N/A
1 mm 5.46 kg / 12.03 pounds
4 197 Gs
0.82 kg / 1.80 pounds
819 g / 8.0 N
4.91 kg / 10.83 pounds
~0 Gs
2 mm 4.98 kg / 10.97 pounds
4 007 Gs
0.75 kg / 1.65 pounds
746 g / 7.3 N
4.48 kg / 9.87 pounds
~0 Gs
3 mm 4.46 kg / 9.83 pounds
3 794 Gs
0.67 kg / 1.48 pounds
669 g / 6.6 N
4.01 kg / 8.85 pounds
~0 Gs
5 mm 3.43 kg / 7.56 pounds
3 326 Gs
0.51 kg / 1.13 pounds
514 g / 5.0 N
3.09 kg / 6.80 pounds
~0 Gs
10 mm 1.49 kg / 3.30 pounds
2 196 Gs
0.22 kg / 0.49 pounds
224 g / 2.2 N
1.35 kg / 2.97 pounds
~0 Gs
20 mm 0.24 kg / 0.53 pounds
878 Gs
0.04 kg / 0.08 pounds
36 g / 0.4 N
0.21 kg / 0.47 pounds
~0 Gs
50 mm 0.00 kg / 0.01 pounds
113 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
70 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.00 pounds
46 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
32 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
23 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
17 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Protective zones (electronics) - warnings
MW 16x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.0 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Timepiece 20 Gs (2.0 mT) 4.0 cm
Mobile device 40 Gs (4.0 mT) 3.0 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: Impact energy (cracking risk) - collision effects
MW 16x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 26.50 km/h
(7.36 m/s)
0.12 J
30 mm 44.78 km/h
(12.44 m/s)
0.35 J
50 mm 57.81 km/h
(16.06 m/s)
0.58 J
100 mm 81.75 km/h
(22.71 m/s)
1.17 J

Table 9: Coating parameters (durability)
MW 16x3 / 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 16x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 141 Mx 51.4 µWb
Pc Coefficient 0.27 Low (Flat)

Table 11: Submerged application
MW 16x3 / N38

Environment Effective steel pull Effect
Air (land) 2.97 kg Standard
Water (riverbed) 3.40 kg
(+0.43 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. Sliding resistance

*Warning: On a vertical surface, the magnet holds only ~20% of its perpendicular strength.

2. Steel saturation

*Thin steel (e.g. computer case) significantly reduces 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) = 0.27

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
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: 010033-2026
Measurement Calculator
Force (pull)

Field Strength

Other offers

The offered product is an incredibly powerful cylinder magnet, made from durable NdFeB material, which, at dimensions of Ø16x3 mm, guarantees the highest energy density. The MW 16x3 / N38 model is characterized by a tolerance of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 2.97 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 29.11 N with a weight of only 4.52 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need even stronger magnets in the same volume (Ø16x3), 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 3 mm. The key parameter here is the lifting capacity amounting to approximately 2.97 kg (force ~29.11 N), which, with such compact 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.
This rod magnet is magnetized axially (along the height of 3 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.

Pros and cons of Nd2Fe14B magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
  • Magnets perfectly resist against demagnetization caused by external fields,
  • A magnet with a smooth nickel surface is more attractive,
  • The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
  • Possibility of detailed shaping as well as adjusting to complex conditions,
  • Fundamental importance in future technologies – they are utilized in mass storage devices, electric drive systems, medical devices, also other advanced devices.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets and ways of using them
  • At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets decrease their power 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
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • We suggest cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these products can be problematic in diagnostics medical when they are in the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Highest magnetic holding forcewhat affects it?

The force parameter is a measurement result conducted under specific, ideal conditions:
  • using a plate made of mild steel, acting as a ideal flux conductor
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • with a plane cleaned and smooth
  • without the slightest insulating layer between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • in neutral thermal conditions

Practical lifting capacity: influencing factors

Effective lifting capacity is influenced by working environment parameters, mainly (from most important):
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Material composition – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Surface structure – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Thermal factor – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

H&S for magnets
Health Danger

Patients with a heart stimulator should keep an large gap from magnets. The magnetism can stop the functioning of the life-saving device.

Do not underestimate power

Use magnets with awareness. Their powerful strength can shock even professionals. Plan your moves and respect their force.

Serious injuries

Risk of injury: The pulling power is so immense that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.

Shattering risk

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them cracking into small pieces.

Dust explosion hazard

Fire hazard: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.

Cards and drives

Avoid bringing magnets near a purse, laptop, or TV. The magnetism can destroy these devices and wipe information from cards.

Swallowing risk

Always keep magnets away from children. Choking hazard is high, and the effects of magnets connecting inside the body are fatal.

GPS and phone interference

GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Demagnetization risk

Control the heat. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

Metal Allergy

Studies show that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, avoid touching magnets with bare hands or opt for coated magnets.

Safety First! Looking for details? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98