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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

Physical modeling of the product - data

These values constitute the outcome of a mathematical simulation. Values are based on models for the material Nd2Fe14B. Real-world performance might slightly differ. Use these data as a reference point when designing systems.

Table 1: Static pull force (force vs gap) - characteristics
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: Vertical capacity (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 (sliding) - vertical pull
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 (substrate influence) - 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: Two magnets (repulsion) - field collision
MW 16x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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: Hazards (implants) - 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 (kinetic energy) - warning
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: Anti-corrosion coating 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: Construction 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: Hydrostatics and buoyancy
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%
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 merely ~20% of its perpendicular strength.

2. Plate thickness effect

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

3. Power loss vs temp

*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) = 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%
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: 010033-2026
Measurement Calculator
Force (pull)

Magnetic Field

View also products

The offered product is an incredibly powerful rod magnet, composed of modern NdFeB material, which, with dimensions of Ø16x3 mm, guarantees maximum efficiency. The MW 16x3 / N38 component features high dimensional repeatability and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 2.97 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 29.11 N with a weight of only 4.52 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 16.1 mm) using two-component epoxy glues. To ensure long-term durability 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 professional neodymium magnets, offering a great economic balance 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.
This model is characterized by dimensions Ø16x3 mm, which, at a weight of 4.52 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 2.97 kg (force ~29.11 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface 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 diametrically if your project requires it.

Pros and cons of neodymium magnets.

Benefits

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:
  • They have stable power, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
  • They do not lose their magnetic properties even under strong external field,
  • Thanks to the shiny finish, the plating of nickel, gold, or silver gives an aesthetic appearance,
  • They feature high magnetic induction at the operating surface, which affects their effectiveness,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to modularity in forming and the ability to customize to specific needs,
  • Significant place in innovative solutions – they serve a role in hard drives, electromotive mechanisms, medical devices, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in compact constructions

Weaknesses

Cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of producing nuts in the magnet and complex shapes - preferred is a housing - mounting mechanism.
  • Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Furthermore, tiny parts of these products can complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Detachment force of the magnet in optimal conditionswhat affects it?

Breakaway force was defined for the most favorable conditions, including:
  • with the contact of a yoke made of special test steel, ensuring maximum field concentration
  • with a thickness minimum 10 mm
  • with a plane free of scratches
  • with total lack of distance (no impurities)
  • during detachment in a direction vertical to the plane
  • at temperature room level

Lifting capacity in real conditions – factors

Please note that the application force may be lower subject to elements below, in order of importance:
  • Distance (betwixt the magnet and the metal), since even a tiny distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
  • Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • 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 – low-carbon steel gives the best results. Alloy steels lower magnetic properties and holding force.
  • Surface finish – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate reduces the holding force.

H&S for magnets
Product not for children

Neodymium magnets are not toys. Eating a few magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires immediate surgery.

Avoid contact if allergic

Certain individuals have a sensitization to nickel, which is the typical protective layer for neodymium magnets. Prolonged contact might lead to skin redness. We strongly advise use safety gloves.

Mechanical processing

Combustion risk: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.

Keep away from electronics

Navigation devices and smartphones are highly susceptible to magnetic fields. Close proximity with a strong magnet can permanently damage the internal compass in your phone.

Safe operation

Handle with care. Rare earth magnets attract from a distance and connect with huge force, often faster than you can react.

Bone fractures

Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Operating temperature

Avoid heat. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Magnetic media

Do not bring magnets near a wallet, computer, or screen. The magnetic field can destroy these devices and erase data from cards.

Warning for heart patients

Warning for patients: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or ask another person to handle the magnets.

Fragile material

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them shattering into shards.

Safety First! Details about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98