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MW 14x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010025

GTIN/EAN: 5906301810247

5.00
Load capacity 2.76 kg / 27.06 N Magnetic Induction 244.11 mT / 2441 Gs
Diameter Ø
14 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
3.46 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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price from 1 pcs
1.500 zł
1.845 zł
price from 400 pcs
1.410 zł
1.734 zł
price from 1700 pcs
1.320 zł
1.624 zł

Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Detailed specification - 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
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 magnet - report

Presented values represent the result of a physical calculation. Results were calculated on models for the class Nd2Fe14B. Operational conditions may differ. Treat these data as a reference point during assembly planning.

Table 1: Static force (force vs gap) - power drop
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 LBS
2760.0 g / 27.1 N
strong
1 mm 2199 Gs
219.9 mT
2.24 kg / 4.94 LBS
2241.6 g / 22.0 N
strong
2 mm 1900 Gs
190.0 mT
1.67 kg / 3.69 LBS
1673.8 g / 16.4 N
weak grip
3 mm 1593 Gs
159.3 mT
1.18 kg / 2.59 LBS
1175.5 g / 11.5 N
weak grip
5 mm 1062 Gs
106.2 mT
0.52 kg / 1.15 LBS
523.0 g / 5.1 N
weak grip
10 mm 380 Gs
38.0 mT
0.07 kg / 0.15 LBS
66.8 g / 0.7 N
weak grip
15 mm 160 Gs
16.0 mT
0.01 kg / 0.03 LBS
11.9 g / 0.1 N
weak grip
20 mm 79 Gs
7.9 mT
0.00 kg / 0.01 LBS
2.9 g / 0.0 N
weak grip
30 mm 27 Gs
2.7 mT
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
weak grip
50 mm 7 Gs
0.7 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip

Table 2: Sliding hold (wall)
MW 14x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.55 kg / 1.22 LBS
552.0 g / 5.4 N
1 mm Stal (~0.2) 0.45 kg / 0.99 LBS
448.0 g / 4.4 N
2 mm Stal (~0.2) 0.33 kg / 0.74 LBS
334.0 g / 3.3 N
3 mm Stal (~0.2) 0.24 kg / 0.52 LBS
236.0 g / 2.3 N
5 mm Stal (~0.2) 0.10 kg / 0.23 LBS
104.0 g / 1.0 N
10 mm Stal (~0.2) 0.01 kg / 0.03 LBS
14.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 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: Vertical assembly (shearing) - vertical pull
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 LBS
828.0 g / 8.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.55 kg / 1.22 LBS
552.0 g / 5.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.28 kg / 0.61 LBS
276.0 g / 2.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
1.38 kg / 3.04 LBS
1380.0 g / 13.5 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 14x3 / N38

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

Table 5: Thermal resistance (stability) - 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 LBS
2760.0 g / 27.1 N
OK
40 °C -2.2% 2.70 kg / 5.95 LBS
2699.3 g / 26.5 N
OK
60 °C -4.4% 2.64 kg / 5.82 LBS
2638.6 g / 25.9 N
80 °C -6.6% 2.58 kg / 5.68 LBS
2577.8 g / 25.3 N
100 °C -28.8% 1.97 kg / 4.33 LBS
1965.1 g / 19.3 N

Table 6: Two magnets (attraction) - field collision
MW 14x3 / N38

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

Table 7: Safety (HSE) (implants) - 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
Timepiece 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 3.0 cm
Remote 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 25.14 km/h
(6.98 m/s)
0.08 J
30 mm 25.43 km/h
(7.06 m/s)
0.09 J
50 mm 25.43 km/h
(7.06 m/s)
0.09 J
100 mm 25.43 km/h
(7.06 m/s)
0.09 J

Table 9: Surface protection spec
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: Electrical data (Flux)
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%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

1. Vertical hold

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

2. Efficiency vs thickness

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

3. Temperature resistance

*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) = 0.31

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 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: 010025-2026
Magnet Unit Converter

Pulling force


Field Strength

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The presented product is a very strong cylinder magnet, made from modern NdFeB material, which, at dimensions of Ø14x3 mm, guarantees maximum efficiency. This specific item features high dimensional repeatability and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 2.76 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 27.06 N with a weight of only 3.46 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are suitable for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest 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.
The presented product is a neodymium magnet with precisely defined parameters: diameter 14 mm and height 3 mm. The key parameter here is the lifting capacity amounting to approximately 2.76 kg (force ~27.06 N), which, with such compact dimensions, proves the high power 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 14 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 diametrically if your project requires it.

Pros and cons of Nd2Fe14B magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • Their strength is maintained, and after around 10 years it drops only by ~1% (theoretically),
  • They possess excellent resistance to weakening of magnetic properties when exposed to external fields,
  • The use of an aesthetic finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnetic induction on the surface of the magnet turns out to be strong,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Possibility of accurate shaping and optimizing to individual conditions,
  • Key role in electronics industry – they are commonly used in HDD drives, electric motors, medical devices, as well as other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in miniature devices

Disadvantages

Disadvantages of NdFeB magnets:
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
  • 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 when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We recommend cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated forms.
  • Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, tiny parts of these magnets can disrupt the diagnostic process medical in case of swallowing.
  • Due to neodymium price, their price is relatively high,

Holding force characteristics

Maximum holding power of the magnet – what contributes to it?

The lifting capacity listed is a theoretical maximum value conducted under specific, ideal conditions:
  • with the use of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • characterized by smoothness
  • with total lack of distance (no coatings)
  • for force acting at a right angle (in the magnet axis)
  • at room temperature

Practical lifting capacity: influencing factors

Holding efficiency is affected by working environment parameters, such as (from priority):
  • Air gap (between the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Base massiveness – too thin sheet does not accept the full field, causing part of the flux to be lost into the air.
  • Material type – the best choice is high-permeability steel. Hardened steels may attract less.
  • Surface quality – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Temperature influence – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under parallel forces the holding force is lower. Moreover, even a slight gap between the magnet and the plate lowers the holding force.

H&S for magnets
Danger to pacemakers

People with a heart stimulator must keep an large gap from magnets. The magnetic field can stop the functioning of the implant.

Electronic devices

Powerful magnetic fields can destroy records on credit cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.

Swallowing risk

Adult use only. Tiny parts pose a choking risk, leading to severe trauma. Store away from children and animals.

Magnetic interference

Be aware: rare earth magnets produce a field that confuses sensitive sensors. Maintain a separation from your phone, tablet, and GPS.

Safe operation

Handle with care. Neodymium magnets act from a long distance and snap with massive power, often quicker than you can react.

Dust is flammable

Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this may cause fire.

Eye protection

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Clashing of two magnets leads to them shattering into small pieces.

Metal Allergy

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and wear gloves.

Physical harm

Protect your hands. Two large magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Thermal limits

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

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