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MW 15x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010028

GTIN/EAN: 5906301810278

5.00
Load capacity 1.51 kg / 14.84 N Magnetic Induction 159.70 mT / 1597 Gs
Diameter Ø
15 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
2.65 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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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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Physical properties - MW 15x2 / N38 - cylindrical magnet

Specification / characteristics - MW 15x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010028
GTIN/EAN 5906301810278
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 15 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 2.65 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.51 kg / 14.84 N
Magnetic Induction ~ ? 159.70 mT / 1597 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 15x2 / 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 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

Physical modeling of the product - technical parameters

Presented information are the result of a engineering simulation. Values rely on algorithms for the material Nd2Fe14B. Operational conditions may deviate from the simulation results. Treat these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs distance) - interaction chart
MW 15x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1597 Gs
159.7 mT
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
weak grip
1 mm 1483 Gs
148.3 mT
1.30 kg / 2.87 LBS
1303.0 g / 12.8 N
weak grip
2 mm 1320 Gs
132.0 mT
1.03 kg / 2.28 LBS
1032.2 g / 10.1 N
weak grip
3 mm 1137 Gs
113.7 mT
0.77 kg / 1.69 LBS
765.0 g / 7.5 N
weak grip
5 mm 791 Gs
79.1 mT
0.37 kg / 0.82 LBS
370.8 g / 3.6 N
weak grip
10 mm 298 Gs
29.8 mT
0.05 kg / 0.12 LBS
52.5 g / 0.5 N
weak grip
15 mm 127 Gs
12.7 mT
0.01 kg / 0.02 LBS
9.6 g / 0.1 N
weak grip
20 mm 63 Gs
6.3 mT
0.00 kg / 0.01 LBS
2.4 g / 0.0 N
weak grip
30 mm 22 Gs
2.2 mT
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
weak grip
50 mm 5 Gs
0.5 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
weak grip

Table 2: Shear hold (vertical surface)
MW 15x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.30 kg / 0.67 LBS
302.0 g / 3.0 N
1 mm Stal (~0.2) 0.26 kg / 0.57 LBS
260.0 g / 2.6 N
2 mm Stal (~0.2) 0.21 kg / 0.45 LBS
206.0 g / 2.0 N
3 mm Stal (~0.2) 0.15 kg / 0.34 LBS
154.0 g / 1.5 N
5 mm Stal (~0.2) 0.07 kg / 0.16 LBS
74.0 g / 0.7 N
10 mm Stal (~0.2) 0.01 kg / 0.02 LBS
10.0 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: Wall mounting (shearing) - behavior on slippery surfaces
MW 15x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.45 kg / 1.00 LBS
453.0 g / 4.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.30 kg / 0.67 LBS
302.0 g / 3.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.15 kg / 0.33 LBS
151.0 g / 1.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.76 kg / 1.66 LBS
755.0 g / 7.4 N

Table 4: Steel thickness (substrate influence) - power losses
MW 15x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.15 kg / 0.33 LBS
151.0 g / 1.5 N
1 mm
25%
0.38 kg / 0.83 LBS
377.5 g / 3.7 N
2 mm
50%
0.76 kg / 1.66 LBS
755.0 g / 7.4 N
3 mm
75%
1.13 kg / 2.50 LBS
1132.5 g / 11.1 N
5 mm
100%
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
10 mm
100%
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
11 mm
100%
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
12 mm
100%
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N

Table 5: Thermal stability (stability) - power drop
MW 15x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
OK
40 °C -2.2% 1.48 kg / 3.26 LBS
1476.8 g / 14.5 N
OK
60 °C -4.4% 1.44 kg / 3.18 LBS
1443.6 g / 14.2 N
80 °C -6.6% 1.41 kg / 3.11 LBS
1410.3 g / 13.8 N
100 °C -28.8% 1.08 kg / 2.37 LBS
1075.1 g / 10.5 N

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 15x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.78 kg / 6.12 LBS
2 915 Gs
0.42 kg / 0.92 LBS
417 g / 4.1 N
N/A
1 mm 2.61 kg / 5.76 LBS
3 096 Gs
0.39 kg / 0.86 LBS
392 g / 3.8 N
2.35 kg / 5.18 LBS
~0 Gs
2 mm 2.40 kg / 5.28 LBS
2 966 Gs
0.36 kg / 0.79 LBS
360 g / 3.5 N
2.16 kg / 4.76 LBS
~0 Gs
3 mm 2.15 kg / 4.75 LBS
2 812 Gs
0.32 kg / 0.71 LBS
323 g / 3.2 N
1.94 kg / 4.27 LBS
~0 Gs
5 mm 1.65 kg / 3.63 LBS
2 459 Gs
0.25 kg / 0.54 LBS
247 g / 2.4 N
1.48 kg / 3.27 LBS
~0 Gs
10 mm 0.68 kg / 1.50 LBS
1 582 Gs
0.10 kg / 0.23 LBS
102 g / 1.0 N
0.61 kg / 1.35 LBS
~0 Gs
20 mm 0.10 kg / 0.21 LBS
595 Gs
0.01 kg / 0.03 LBS
14 g / 0.1 N
0.09 kg / 0.19 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
71 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
43 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
28 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
19 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
14 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
10 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Protective zones (implants) - warnings
MW 15x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.0 cm
Timepiece 20 Gs (2.0 mT) 3.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.5 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 (cracking risk) - collision effects
MW 15x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 22.74 km/h
(6.32 m/s)
0.05 J
30 mm 23.07 km/h
(6.41 m/s)
0.05 J
50 mm 23.08 km/h
(6.41 m/s)
0.05 J
100 mm 23.08 km/h
(6.41 m/s)
0.05 J

Table 9: Surface protection spec
MW 15x2 / 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 15x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 541 Mx 35.4 µWb
Pc Coefficient 0.20 Low (Flat)

Table 11: Submerged application
MW 15x2 / N38

Environment Effective steel pull Effect
Air (land) 1.51 kg Standard
Water (riverbed) 1.73 kg
(+0.22 kg buoyancy gain)
+14.5%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

1. Shear force

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

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) significantly weakens the holding force.

3. Temperature resistance

*For standard magnets, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.20

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

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: 010028-2026
Quick Unit Converter

Pulling force


Magnetic Induction

Other products

The presented product is an extremely powerful cylinder magnet, composed of advanced NdFeB material, which, with dimensions of Ø15x2 mm, guarantees the highest energy density. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 1.51 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 typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 14.84 N with a weight of only 2.65 g, this rod is indispensable in electronics and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in industry, specialized industrial adhesives 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 modeling and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø15x2), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 15 mm and height 2 mm. The value of 14.84 N means that the magnet is capable of holding a weight many times exceeding its own mass of 2.65 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 2 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard 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.

Advantages as well as disadvantages of rare earth magnets.

Benefits

Besides their stability, neodymium magnets are valued for these benefits:
  • They retain full power for around ten years – the drop is just ~1% (in theory),
  • Neodymium magnets prove to be extremely resistant to magnetic field loss caused by external magnetic fields,
  • Thanks to the metallic finish, the surface of nickel, gold, or silver gives an modern appearance,
  • Magnetic induction on the working part of the magnet remains strong,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of detailed modeling as well as optimizing to atypical conditions,
  • Wide application in advanced technology sectors – they find application in mass storage devices, electric motors, advanced medical instruments, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in miniature devices

Cons

Problematic aspects of neodymium magnets and proposals for their use:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • We suggest a housing - magnetic holder, due to difficulties in producing threads inside the magnet and complex shapes.
  • Health risk to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Furthermore, small elements of these products can be problematic in diagnostics medical after entering the body.
  • Due to neodymium price, their price is relatively high,

Lifting parameters

Maximum magnetic pulling forcewhat contributes to it?

Information about lifting capacity is the result of a measurement 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 cross-section minimum 10 mm
  • with an ground touching surface
  • under conditions of gap-free contact (surface-to-surface)
  • under axial application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

During everyday use, the actual lifting capacity depends on a number of factors, listed from the most important:
  • Gap between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – mild steel gives the best results. Higher carbon content decrease magnetic properties and holding force.
  • Surface condition – ground elements ensure maximum contact, which increases force. Uneven metal weaken the grip.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, in contrast 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 lifting capacity.

Safety rules for work with NdFeB magnets
Physical harm

Protect your hands. Two large magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!

Caution required

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Sensitization to coating

Studies show that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, refrain from direct skin contact and opt for coated magnets.

Shattering risk

Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Electronic hazard

Device Safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, medical aids, timepieces).

Product not for children

Neodymium magnets are not intended for children. Eating multiple magnets can lead to them attracting across intestines, which constitutes a critical condition and requires urgent medical intervention.

Medical implants

Individuals with a heart stimulator should keep an absolute distance from magnets. The magnetic field can interfere with the functioning of the implant.

Demagnetization risk

Avoid heat. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Combustion hazard

Machining of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

GPS Danger

A powerful magnetic field disrupts the functioning of compasses in phones and navigation systems. Maintain magnets close to a smartphone to avoid damaging the sensors.

Safety First! Details about hazards in the article: Safety of working with magnets.