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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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Technical parameters - 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

Engineering modeling of the assembly - data

The following values represent the result of a engineering analysis. Results rely on algorithms for the class Nd2Fe14B. Operational conditions might slightly differ. Treat these data as a supplementary guide for designers.

Table 1: Static pull force (pull vs distance) - power drop
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 lbs
2970.0 g / 29.1 N
medium risk
1 mm 2004 Gs
200.4 mT
2.52 kg / 5.55 lbs
2519.3 g / 24.7 N
medium risk
2 mm 1782 Gs
178.2 mT
1.99 kg / 4.39 lbs
1993.2 g / 19.6 N
low risk
3 mm 1543 Gs
154.3 mT
1.49 kg / 3.29 lbs
1494.0 g / 14.7 N
low risk
5 mm 1098 Gs
109.8 mT
0.76 kg / 1.67 lbs
756.6 g / 7.4 N
low risk
10 mm 439 Gs
43.9 mT
0.12 kg / 0.27 lbs
120.9 g / 1.2 N
low risk
15 mm 195 Gs
19.5 mT
0.02 kg / 0.05 lbs
23.9 g / 0.2 N
low risk
20 mm 99 Gs
9.9 mT
0.01 kg / 0.01 lbs
6.2 g / 0.1 N
low risk
30 mm 35 Gs
3.5 mT
0.00 kg / 0.00 lbs
0.8 g / 0.0 N
low risk
50 mm 8 Gs
0.8 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
low risk

Table 2: Vertical force (wall)
MW 16x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.59 kg / 1.31 lbs
594.0 g / 5.8 N
1 mm Stal (~0.2) 0.50 kg / 1.11 lbs
504.0 g / 4.9 N
2 mm Stal (~0.2) 0.40 kg / 0.88 lbs
398.0 g / 3.9 N
3 mm Stal (~0.2) 0.30 kg / 0.66 lbs
298.0 g / 2.9 N
5 mm Stal (~0.2) 0.15 kg / 0.34 lbs
152.0 g / 1.5 N
10 mm Stal (~0.2) 0.02 kg / 0.05 lbs
24.0 g / 0.2 N
15 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 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) - 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 lbs
891.0 g / 8.7 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.59 kg / 1.31 lbs
594.0 g / 5.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.30 kg / 0.65 lbs
297.0 g / 2.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.49 kg / 3.27 lbs
1485.0 g / 14.6 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 16x3 / N38

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

Table 5: Working in heat (stability) - resistance threshold
MW 16x3 / N38

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

Table 6: Two magnets (repulsion) - forces in the system
MW 16x3 / N38

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

Table 7: Protective zones (electronics) - precautionary measures
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
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: Dynamics (cracking risk) - 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: Corrosion resistance
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 (Pc)
MW 16x3 / N38

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

Table 11: Physics of underwater searching
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%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Shear force

*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its max power.

2. Steel thickness impact

*Thin metal sheet (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Thermal stability

*For standard magnets, the safety limit 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)

Field Strength

Other offers

The presented product is an extremely powerful cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø16x3 mm, guarantees maximum efficiency. The MW 16x3 / N38 component features high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 2.97 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 29.11 N with a weight of only 4.52 g, this rod is indispensable in electronics 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 industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are strong enough for 90% of applications in automation and machine building, where excessive miniaturization with maximum force is not required. 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 available off-the-shelf in our warehouse.
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 value of 29.11 N means that the magnet is capable of holding a weight many times exceeding its own mass of 4.52 g. The product has a [NiCuNi] coating, which protects the surface against external factors, 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.

Advantages as well as disadvantages of neodymium magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They have stable power, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They possess excellent resistance to magnetic field loss when exposed to external magnetic sources,
  • By applying a shiny layer of nickel, the element presents an modern look,
  • Magnets exhibit impressive magnetic induction on the outer side,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Due to the possibility of flexible shaping and adaptation to custom needs, NdFeB magnets can be produced in a variety of geometric configurations, which amplifies use scope,
  • Universal use in innovative solutions – they are utilized in HDD drives, brushless drives, medical equipment, as well as modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Limited ability of producing threads in the magnet and complicated shapes - recommended is a housing - magnet mounting.
  • Health risk related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these products can disrupt the diagnostic process medical in case of swallowing.
  • Due to complex production process, their price is relatively high,

Holding force characteristics

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

Magnet power was defined for ideal contact conditions, assuming:
  • with the contact of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • whose transverse dimension equals approx. 10 mm
  • characterized by smoothness
  • without the slightest insulating layer between the magnet and steel
  • for force acting at a right angle (in the magnet axis)
  • in temp. approx. 20°C

Lifting capacity in practice – influencing factors

In practice, the actual lifting capacity is determined by a number of factors, presented from the most important:
  • Gap between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Chemical composition of the base – low-carbon steel attracts best. Alloy admixtures decrease magnetic properties and holding force.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Warnings
Combustion hazard

Fire warning: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Safe distance

Powerful magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

Demagnetization risk

Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. The loss of strength is permanent.

Allergy Warning

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction happens, immediately stop handling magnets and use protective gear.

Keep away from children

These products are not toys. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which poses a severe health hazard and necessitates urgent medical intervention.

Warning for heart patients

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

Hand protection

Pinching hazard: The attraction force is so immense that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.

Precision electronics

Navigation devices and smartphones are highly sensitive to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Caution required

Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.

Magnet fragility

Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Important! Looking for details? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98