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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 data - 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 simulation of the magnet - technical parameters

The following values represent the outcome of a engineering analysis. Values were calculated on models for the class Nd2Fe14B. Real-world performance may deviate from the simulation results. Use these calculations as a supplementary guide when designing systems.

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

Table 2: Sliding capacity (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 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) - 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: Steel thickness (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: Thermal stability (stability) - 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 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 (attraction) - forces in the system
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: Safety (HSE) (implants) - 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
Phone / Smartphone 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) - 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: 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: Underwater work (magnet fishing)
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

*Caution: On a vertical wall, the magnet retains merely ~20% of its perpendicular strength.

2. Steel thickness impact

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

3. Power loss vs temp

*For N38 material, 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
Elemental analysis
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
Magnet Unit Converter
Magnet pull force

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This product is an extremely powerful cylindrical magnet, composed of durable NdFeB material, which, at dimensions of Ø16x3 mm, guarantees maximum efficiency. This specific item features high dimensional repeatability and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 2.97 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast 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.
This model is perfect for building electric motors, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 29.11 N with a weight of only 4.52 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a very precise dimensions, 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 industry, 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 high resistance to demagnetization. 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 warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 16 mm and height 3 mm. 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 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.

Advantages as well as disadvantages of rare earth magnets.

Strengths

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even after approximately ten years – the reduction in power is only ~1% (based on measurements),
  • They are extremely resistant to demagnetization induced by external field influence,
  • Thanks to the shiny finish, the surface of Ni-Cu-Ni, gold, or silver-plated gives an professional appearance,
  • They show high magnetic induction at the operating surface, which affects their effectiveness,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to modularity in shaping and the capacity to customize to client solutions,
  • Key role in electronics industry – they are utilized in magnetic memories, electric motors, diagnostic systems, and multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Drawbacks and weaknesses of neodymium magnets: application proposals
  • At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of creating nuts in the magnet and complex shapes - recommended is cover - magnetic holder.
  • Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these magnets can be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum holding power of the magnet – what it depends on?

Holding force of 2.97 kg is a result of laboratory testing executed under standard conditions:
  • on a plate made of mild steel, effectively closing the magnetic flux
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with an ground touching surface
  • with zero gap (without impurities)
  • during detachment in a direction perpendicular to the plane
  • at temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

In real-world applications, the actual holding force is determined by a number of factors, presented from the most important:
  • Space between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
  • Steel grade – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
  • Plate texture – smooth surfaces ensure maximum contact, which increases field saturation. Uneven metal reduce efficiency.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity was measured by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Safety rules for work with NdFeB magnets
Danger to pacemakers

Individuals with a heart stimulator must keep an absolute distance from magnets. The magnetism can disrupt the functioning of the implant.

Metal Allergy

Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation happens, cease working with magnets and wear gloves.

Power loss in heat

Keep cool. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, look for HT versions (H, SH, UH).

Caution required

Be careful. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can react.

Fire risk

Machining of neodymium magnets carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Magnet fragility

NdFeB magnets are ceramic materials, meaning they are very brittle. Impact of two magnets will cause them cracking into shards.

Impact on smartphones

Be aware: neodymium magnets generate a field that disrupts sensitive sensors. Maintain a safe distance from your phone, tablet, and navigation systems.

Protect data

Very strong magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Stay away of min. 10 cm.

Bone fractures

Big blocks can break fingers in a fraction of a second. Under no circumstances put your hand betwixt two strong magnets.

Adults only

These products are not intended for children. Swallowing multiple magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires immediate surgery.

Important! 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