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MW 15x1 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010026

GTIN/EAN: 5906301810254

5.00

Diameter Ø

15 mm [±0,1 mm]

Height

1 mm [±0,1 mm]

Weight

1.33 g

Magnetization Direction

↑ axial

Load capacity

0.44 kg / 4.29 N

Magnetic Induction

81.93 mT / 819 Gs

Coating

[NiCuNi] Nickel

0.800 with VAT / pcs + price for transport

0.650 ZŁ net + 23% VAT / pcs

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Technical - MW 15x1 / N38 - cylindrical magnet

Specification / characteristics - MW 15x1 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010026
GTIN/EAN 5906301810254
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 1 mm [±0,1 mm]
Weight 1.33 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.44 kg / 4.29 N
Magnetic Induction ~ ? 81.93 mT / 819 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 15x1 / 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 analysis of the assembly - technical parameters

Presented values constitute the result of a engineering calculation. Values are based on algorithms for the class Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Use these calculations as a supplementary guide during assembly planning.

Table 1: Static force (pull vs gap) - interaction chart
MW 15x1 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 819 Gs
81.9 mT
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
weak grip
1 mm 778 Gs
77.8 mT
0.40 kg / 0.88 pounds
397.0 g / 3.9 N
weak grip
2 mm 705 Gs
70.5 mT
0.33 kg / 0.72 pounds
326.0 g / 3.2 N
weak grip
3 mm 615 Gs
61.5 mT
0.25 kg / 0.55 pounds
248.0 g / 2.4 N
weak grip
5 mm 434 Gs
43.4 mT
0.12 kg / 0.27 pounds
123.5 g / 1.2 N
weak grip
10 mm 163 Gs
16.3 mT
0.02 kg / 0.04 pounds
17.3 g / 0.2 N
weak grip
15 mm 68 Gs
6.8 mT
0.00 kg / 0.01 pounds
3.1 g / 0.0 N
weak grip
20 mm 34 Gs
3.4 mT
0.00 kg / 0.00 pounds
0.7 g / 0.0 N
weak grip
30 mm 11 Gs
1.1 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
weak grip
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

Table 2: Sliding capacity (vertical surface)
MW 15x1 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.09 kg / 0.19 pounds
88.0 g / 0.9 N
1 mm Stal (~0.2) 0.08 kg / 0.18 pounds
80.0 g / 0.8 N
2 mm Stal (~0.2) 0.07 kg / 0.15 pounds
66.0 g / 0.6 N
3 mm Stal (~0.2) 0.05 kg / 0.11 pounds
50.0 g / 0.5 N
5 mm Stal (~0.2) 0.02 kg / 0.05 pounds
24.0 g / 0.2 N
10 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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: Wall mounting (sliding) - behavior on slippery surfaces
MW 15x1 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.13 kg / 0.29 pounds
132.0 g / 1.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.09 kg / 0.19 pounds
88.0 g / 0.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.22 kg / 0.49 pounds
220.0 g / 2.2 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 15x1 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
1 mm
25%
0.11 kg / 0.24 pounds
110.0 g / 1.1 N
2 mm
50%
0.22 kg / 0.49 pounds
220.0 g / 2.2 N
3 mm
75%
0.33 kg / 0.73 pounds
330.0 g / 3.2 N
5 mm
100%
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
10 mm
100%
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
11 mm
100%
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
12 mm
100%
0.44 kg / 0.97 pounds
440.0 g / 4.3 N

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 15x1 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.44 kg / 0.97 pounds
440.0 g / 4.3 N
OK
40 °C -2.2% 0.43 kg / 0.95 pounds
430.3 g / 4.2 N
OK
60 °C -4.4% 0.42 kg / 0.93 pounds
420.6 g / 4.1 N
80 °C -6.6% 0.41 kg / 0.91 pounds
411.0 g / 4.0 N
100 °C -28.8% 0.31 kg / 0.69 pounds
313.3 g / 3.1 N

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 15x1 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.73 kg / 1.61 pounds
1 597 Gs
0.11 kg / 0.24 pounds
110 g / 1.1 N
N/A
1 mm 0.70 kg / 1.55 pounds
1 607 Gs
0.11 kg / 0.23 pounds
106 g / 1.0 N
0.63 kg / 1.40 pounds
~0 Gs
2 mm 0.66 kg / 1.45 pounds
1 556 Gs
0.10 kg / 0.22 pounds
99 g / 1.0 N
0.59 kg / 1.31 pounds
~0 Gs
3 mm 0.60 kg / 1.33 pounds
1 489 Gs
0.09 kg / 0.20 pounds
91 g / 0.9 N
0.54 kg / 1.20 pounds
~0 Gs
5 mm 0.48 kg / 1.05 pounds
1 323 Gs
0.07 kg / 0.16 pounds
71 g / 0.7 N
0.43 kg / 0.95 pounds
~0 Gs
10 mm 0.21 kg / 0.45 pounds
868 Gs
0.03 kg / 0.07 pounds
31 g / 0.3 N
0.18 kg / 0.41 pounds
~0 Gs
20 mm 0.03 kg / 0.06 pounds
325 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
0.03 kg / 0.06 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
37 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
23 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
15 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
10 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
7 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
5 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Safety (HSE) (electronics) - warnings
MW 15x1 / N38

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

Table 8: Dynamics (cracking risk) - warning
MW 15x1 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 18.79 km/h
(5.22 m/s)
0.02 J
30 mm 31.78 km/h
(8.83 m/s)
0.05 J
50 mm 41.02 km/h
(11.39 m/s)
0.09 J
100 mm 58.01 km/h
(16.11 m/s)
0.17 J

Table 9: Surface protection spec
MW 15x1 / 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 15x1 / N38

Parameter Value SI Unit / Description
Magnetic Flux 2 025 Mx 20.3 µWb
Pc Coefficient 0.11 Low (Flat)

Table 11: Underwater work (magnet fishing)
MW 15x1 / N38

Environment Effective steel pull Effect
Air (land) 0.44 kg Standard
Water (riverbed) 0.50 kg
(+0.06 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Vertical hold

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

2. Steel saturation

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.11

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
Chemical composition
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: 010026-2026
Measurement Calculator
Force (pull)

Field Strength

See more offers

The offered product is an incredibly powerful rod magnet, composed of modern NdFeB material, which, at dimensions of Ø15x1 mm, guarantees the highest energy density. The MW 15x1 / N38 model boasts high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 0.44 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building generators, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 4.29 N with a weight of only 1.33 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure long-term durability in automation, 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 strong enough for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø15x1), 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 Ø15x1 mm, which, at a weight of 1.33 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 0.44 kg (force ~4.29 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface 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 15 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.

Strengths as well as weaknesses of rare earth magnets.

Benefits

Besides their stability, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
  • They maintain their magnetic properties even under external field action,
  • Thanks to the glossy finish, the coating of nickel, gold-plated, or silver-plated gives an professional appearance,
  • Magnets possess extremely high magnetic induction on the active area,
  • 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 versatility in constructing and the capacity to adapt to specific needs,
  • Versatile presence in electronics industry – they find application in mass storage devices, drive modules, advanced medical instruments, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in small systems

Cons

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and 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 suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Limited ability of creating threads in the magnet and complicated shapes - preferred is casing - mounting mechanism.
  • Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • With large orders the cost of neodymium magnets is a challenge,

Pull force analysis

Maximum magnetic pulling forcewhat it depends on?

Holding force of 0.44 kg is a result of laboratory testing executed under the following configuration:
  • using a sheet made of high-permeability steel, acting as a ideal flux conductor
  • with a thickness no less than 10 mm
  • with a surface cleaned and smooth
  • without the slightest air gap between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at conditions approx. 20°C

What influences lifting capacity in practice

Effective lifting capacity is influenced by working environment parameters, mainly (from most important):
  • Air gap (betwixt the magnet and the plate), because even a very small distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
  • Angle of force application – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Metal type – different alloys attracts identically. Alloy additives weaken the attraction effect.
  • Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
  • Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Safety rules for work with neodymium magnets
Nickel allergy

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness occurs, immediately stop working with magnets and wear gloves.

Heat warning

Standard neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Mechanical processing

Dust produced during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

No play value

Product intended for adults. Small elements can be swallowed, causing serious injuries. Store away from children and animals.

Electronic hazard

Intense magnetic fields can destroy records on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

Life threat

Warning for patients: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or request help to work with the magnets.

Threat to navigation

Remember: rare earth magnets generate a field that disrupts sensitive sensors. Maintain a separation from your phone, device, and GPS.

Material brittleness

NdFeB magnets are ceramic materials, which means they are fragile like glass. Impact of two magnets will cause them shattering into small pieces.

Immense force

Handle magnets with awareness. Their immense force can shock even experienced users. Stay alert and respect their power.

Bone fractures

Danger of trauma: The pulling power is so immense that it can cause blood blisters, pinching, and broken bones. Use thick gloves.

Caution! Need more info? Read our article: Are neodymium magnets dangerous?