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MW 14x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010025

GTIN/EAN: 5906301810247

5.00

Diameter Ø

14 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

3.46 g

Magnetization Direction

↑ axial

Load capacity

2.76 kg / 27.06 N

Magnetic Induction

244.11 mT / 2441 Gs

Coating

[NiCuNi] Nickel

1.845 with VAT / pcs + price for transport

1.500 ZŁ net + 23% VAT / pcs

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Physical properties - MW 14x3 / N38 - cylindrical magnet

Specification / characteristics - MW 14x3 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010025
GTIN/EAN 5906301810247
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 14 mm [±0,1 mm]
Height 3 mm [±0,1 mm]
Weight 3.46 g
Magnetization Direction ↑ axial
Load capacity ~ ? 2.76 kg / 27.06 N
Magnetic Induction ~ ? 244.11 mT / 2441 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 14x3 / 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 magnet - technical parameters

The following data represent the result of a mathematical simulation. Results are based on algorithms for the class Nd2Fe14B. Real-world conditions may deviate from the simulation results. Treat these data as a supplementary guide for designers.

Table 1: Static pull force (force vs distance) - characteristics
MW 14x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2440 Gs
244.0 mT
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
medium risk
1 mm 2199 Gs
219.9 mT
2.24 kg / 4.94 pounds
2241.6 g / 22.0 N
medium risk
2 mm 1900 Gs
190.0 mT
1.67 kg / 3.69 pounds
1673.8 g / 16.4 N
safe
3 mm 1593 Gs
159.3 mT
1.18 kg / 2.59 pounds
1175.5 g / 11.5 N
safe
5 mm 1062 Gs
106.2 mT
0.52 kg / 1.15 pounds
523.0 g / 5.1 N
safe
10 mm 380 Gs
38.0 mT
0.07 kg / 0.15 pounds
66.8 g / 0.7 N
safe
15 mm 160 Gs
16.0 mT
0.01 kg / 0.03 pounds
11.9 g / 0.1 N
safe
20 mm 79 Gs
7.9 mT
0.00 kg / 0.01 pounds
2.9 g / 0.0 N
safe
30 mm 27 Gs
2.7 mT
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
safe
50 mm 7 Gs
0.7 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe

Table 2: Sliding load (vertical surface)
MW 14x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.55 kg / 1.22 pounds
552.0 g / 5.4 N
1 mm Stal (~0.2) 0.45 kg / 0.99 pounds
448.0 g / 4.4 N
2 mm Stal (~0.2) 0.33 kg / 0.74 pounds
334.0 g / 3.3 N
3 mm Stal (~0.2) 0.24 kg / 0.52 pounds
236.0 g / 2.3 N
5 mm Stal (~0.2) 0.10 kg / 0.23 pounds
104.0 g / 1.0 N
10 mm Stal (~0.2) 0.01 kg / 0.03 pounds
14.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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 14x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.83 kg / 1.83 pounds
828.0 g / 8.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.55 kg / 1.22 pounds
552.0 g / 5.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.28 kg / 0.61 pounds
276.0 g / 2.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.38 kg / 3.04 pounds
1380.0 g / 13.5 N

Table 4: Material efficiency (substrate influence) - power losses
MW 14x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.28 kg / 0.61 pounds
276.0 g / 2.7 N
1 mm
25%
0.69 kg / 1.52 pounds
690.0 g / 6.8 N
2 mm
50%
1.38 kg / 3.04 pounds
1380.0 g / 13.5 N
3 mm
75%
2.07 kg / 4.56 pounds
2070.0 g / 20.3 N
5 mm
100%
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
10 mm
100%
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
11 mm
100%
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
12 mm
100%
2.76 kg / 6.08 pounds
2760.0 g / 27.1 N

Table 5: Thermal stability (material behavior) - power drop
MW 14x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 2.76 kg / 6.08 pounds
2760.0 g / 27.1 N
OK
40 °C -2.2% 2.70 kg / 5.95 pounds
2699.3 g / 26.5 N
OK
60 °C -4.4% 2.64 kg / 5.82 pounds
2638.6 g / 25.9 N
80 °C -6.6% 2.58 kg / 5.68 pounds
2577.8 g / 25.3 N
100 °C -28.8% 1.97 kg / 4.33 pounds
1965.1 g / 19.3 N

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 14x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 5.65 kg / 12.46 pounds
4 030 Gs
0.85 kg / 1.87 pounds
848 g / 8.3 N
N/A
1 mm 5.16 kg / 11.37 pounds
4 662 Gs
0.77 kg / 1.71 pounds
773 g / 7.6 N
4.64 kg / 10.23 pounds
~0 Gs
2 mm 4.59 kg / 10.12 pounds
4 398 Gs
0.69 kg / 1.52 pounds
689 g / 6.8 N
4.13 kg / 9.11 pounds
~0 Gs
3 mm 4.00 kg / 8.82 pounds
4 107 Gs
0.60 kg / 1.32 pounds
600 g / 5.9 N
3.60 kg / 7.94 pounds
~0 Gs
5 mm 2.89 kg / 6.37 pounds
3 490 Gs
0.43 kg / 0.96 pounds
434 g / 4.3 N
2.60 kg / 5.74 pounds
~0 Gs
10 mm 1.07 kg / 2.36 pounds
2 125 Gs
0.16 kg / 0.35 pounds
161 g / 1.6 N
0.96 kg / 2.12 pounds
~0 Gs
20 mm 0.14 kg / 0.30 pounds
759 Gs
0.02 kg / 0.05 pounds
21 g / 0.2 N
0.12 kg / 0.27 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
89 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
60 mm 0.00 kg / 0.00 pounds
54 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
36 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
25 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
18 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
13 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 14x3 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Mechanical watch 20 Gs (2.0 mT) 3.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.0 cm
Car key 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (kinetic energy) - collision effects
MW 14x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 28.91 km/h
(8.03 m/s)
0.11 J
30 mm 49.34 km/h
(13.71 m/s)
0.32 J
50 mm 63.69 km/h
(17.69 m/s)
0.54 J
100 mm 90.07 km/h
(25.02 m/s)
1.08 J

Table 9: Corrosion resistance
MW 14x3 / 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 (Pc)
MW 14x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 4 301 Mx 43.0 µWb
Pc Coefficient 0.31 Low (Flat)

Table 11: Submerged application
MW 14x3 / N38

Environment Effective steel pull Effect
Air (land) 2.76 kg Standard
Water (riverbed) 3.16 kg
(+0.40 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Vertical hold

*Note: On a vertical wall, the magnet retains merely approx. 20-30% of its nominal pull.

2. Plate thickness effect

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

3. Power loss vs temp

*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) = 0.31

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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 specification and ecology
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%
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: 010025-2026
Measurement Calculator
Magnet pull force

Magnetic Field

Other proposals

The presented product is an extremely powerful rod magnet, made from durable NdFeB material, which, at dimensions of Ø14x3 mm, guarantees the highest energy density. This specific item is characterized by high dimensional repeatability and industrial build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 2.76 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its triple-layer 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 DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 27.06 N with a weight of only 3.46 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 14.1 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 high repeatability of the connection.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø14x3), 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 Ø14x3 mm, which, at a weight of 3.46 g, makes it an element with impressive magnetic energy density. The value of 27.06 N means that the magnet is capable of holding a weight many times exceeding its own mass of 3.46 g. 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 14 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.

Pros and cons of Nd2Fe14B magnets.

Advantages

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even after approximately 10 years – the reduction in lifting capacity is only ~1% (based on measurements),
  • They are extremely resistant to demagnetization induced by presence of other magnetic fields,
  • A magnet with a smooth silver surface is more attractive,
  • Magnets exhibit very high magnetic induction on the working surface,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to freedom in constructing and the capacity to modify to client solutions,
  • Key role in electronics industry – they are utilized in HDD drives, electromotive mechanisms, diagnostic systems, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in small systems

Weaknesses

Disadvantages of NdFeB magnets:
  • 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.
  • NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • We suggest a housing - magnetic mount, due to difficulties in creating threads inside the magnet and complex forms.
  • Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. Additionally, tiny parts of these products can complicate diagnosis medical after entering the body.
  • Due to neodymium price, their price is relatively high,

Pull force analysis

Optimal lifting capacity of a neodymium magnetwhat contributes to it?

The force parameter is a measurement result performed under specific, ideal conditions:
  • using a sheet made of high-permeability steel, serving as a circuit closing element
  • whose transverse dimension reaches at least 10 mm
  • with an ground contact surface
  • without any air gap between the magnet and steel
  • under vertical application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

During everyday use, the real power is determined by many variables, ranked from crucial:
  • Distance (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Steel thickness – too thin sheet does not accept the full field, causing part of the flux to be wasted into the air.
  • Plate material – low-carbon steel gives the best results. Alloy steels decrease magnetic properties and holding force.
  • Surface finish – full contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was assessed by applying a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with neodymium magnets
Crushing risk

Danger of trauma: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Use thick gloves.

Combustion hazard

Mechanical processing of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

GPS and phone interference

Note: rare earth magnets generate a field that confuses precision electronics. Keep a separation from your mobile, device, and GPS.

Do not overheat magnets

Do not overheat. Neodymium magnets are susceptible to heat. If you require operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Risk of cracking

Protect your eyes. Magnets can explode upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Respect the power

Handle magnets consciously. Their huge power can surprise even experienced users. Plan your moves and do not underestimate their force.

This is not a toy

Absolutely store magnets away from children. Choking hazard is significant, and the effects of magnets clamping inside the body are tragic.

Warning for heart patients

Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Safe distance

Equipment safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).

Allergic reactions

A percentage of the population experience a sensitization to Ni, which is the common plating for NdFeB magnets. Extended handling might lead to dermatitis. We recommend wear safety gloves.

Danger! Learn more about hazards in the article: Safety of working with magnets.