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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 - 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 modeling of the product - data

The following data are the direct effect of a engineering analysis. Values are based on models for the material Nd2Fe14B. Operational performance might slightly differ from theoretical values. Treat these data as a reference point for designers.

Table 1: Static pull force (force vs distance) - 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 lbs
2970.0 g / 29.1 N
strong
1 mm 2004 Gs
200.4 mT
2.52 kg / 5.55 lbs
2519.3 g / 24.7 N
strong
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: Slippage force (vertical surface)
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 (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 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: Material efficiency (saturation) - 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: Thermal resistance (material behavior) - thermal limit
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: Magnet-Magnet interaction (repulsion) - field collision
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: Safety (HSE) (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
Mechanical watch 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: 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: 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: 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%
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 merely approx. 20-30% of its perpendicular strength.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) severely weakens the holding force.

3. Thermal stability

*For N38 grade, 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.

Technical and environmental data
Material specification
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
Magnet Unit Converter
Pulling force

Magnetic Field

Check out more products

The presented product is a very strong rod magnet, composed of durable NdFeB material, which, with dimensions of Ø16x3 mm, guarantees optimal power. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 2.97 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, 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 electronics and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way 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 industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable 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 store.
This model is characterized by dimensions Ø16x3 mm, which, at a weight of 4.52 g, makes it an element with high magnetic energy density. The key parameter here is the holding force amounting to approximately 2.97 kg (force ~29.11 N), which, with such defined 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.
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. Such an arrangement is most desirable 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 through the diameter if your project requires it.

Advantages and disadvantages of rare earth magnets.

Strengths

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (according to literature),
  • Magnets effectively protect themselves against loss of magnetization caused by external fields,
  • By applying a smooth coating of silver, the element gains an modern look,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a key feature,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures reaching 230°C and above...
  • Possibility of accurate shaping as well as adjusting to specific conditions,
  • Versatile presence in modern technologies – they are used in data components, electric motors, diagnostic systems, also other advanced devices.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Problematic aspects of neodymium magnets: application proposals
  • At very strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets decrease their strength 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 recommend using waterproof magnets e.g. in rubber, plastic
  • We recommend cover - magnetic mount, due to difficulties in creating threads inside the magnet and complex shapes.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, tiny parts of these magnets can be problematic in diagnostics medical in case of swallowing.
  • Due to complex production process, their price exceeds standard values,

Holding force characteristics

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

Magnet power was defined for the most favorable conditions, taking into account:
  • with the use of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • with a thickness no less than 10 mm
  • with a surface cleaned and smooth
  • with direct contact (without impurities)
  • for force acting at a right angle (in the magnet axis)
  • at ambient temperature approx. 20 degrees Celsius

Key elements affecting lifting force

Effective lifting capacity impacted by specific conditions, including (from priority):
  • Clearance – existence of any layer (paint, dirt, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – mild steel gives the best results. Alloy steels lower magnetic properties and 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 with the use of a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under shearing force the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.

Warnings
Physical harm

Watch your fingers. Two large magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!

Caution required

Handle with care. Rare earth magnets act from a long distance and connect with massive power, often faster than you can react.

Material brittleness

NdFeB magnets are ceramic materials, which means they are fragile like glass. Clashing of two magnets leads to them cracking into shards.

Health Danger

Individuals with a ICD must maintain an absolute distance from magnets. The magnetism can stop the operation of the life-saving device.

Magnetic interference

GPS units and mobile phones are highly sensitive to magnetic fields. Direct contact with a strong magnet can ruin the sensors in your phone.

Protect data

Very strong magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.

Heat warning

Watch the temperature. Exposing the magnet to high heat will destroy its properties and pulling force.

This is not a toy

Always keep magnets out of reach of children. Ingestion danger is high, and the consequences of magnets connecting inside the body are tragic.

Nickel coating and allergies

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands or select coated magnets.

Dust is flammable

Dust generated during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Danger! Looking for details? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98