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MW 5x15 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010084

GTIN/EAN: 5906301810834

5.00

Diameter Ø

5 mm [±0,1 mm]

Height

15 mm [±0,1 mm]

Weight

2.21 g

Magnetization Direction

↑ axial

Load capacity

0.48 kg / 4.68 N

Magnetic Induction

610.03 mT / 6100 Gs

Coating

[NiCuNi] Nickel

1.107 with VAT / pcs + price for transport

0.900 ZŁ net + 23% VAT / pcs

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Technical - MW 5x15 / N38 - cylindrical magnet

Specification / characteristics - MW 5x15 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010084
GTIN/EAN 5906301810834
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 5 mm [±0,1 mm]
Height 15 mm [±0,1 mm]
Weight 2.21 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.48 kg / 4.68 N
Magnetic Induction ~ ? 610.03 mT / 6100 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x15 / 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

Engineering analysis of the product - report

Presented values constitute the direct effect of a mathematical calculation. Results are based on models for the material Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Treat these data as a supplementary guide when designing systems.

Table 1: Static pull force (force vs distance) - characteristics
MW 5x15 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 6091 Gs
609.1 mT
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
safe
1 mm 3823 Gs
382.3 mT
0.19 kg / 0.42 pounds
189.1 g / 1.9 N
safe
2 mm 2261 Gs
226.1 mT
0.07 kg / 0.15 pounds
66.1 g / 0.6 N
safe
3 mm 1378 Gs
137.8 mT
0.02 kg / 0.05 pounds
24.6 g / 0.2 N
safe
5 mm 607 Gs
60.7 mT
0.00 kg / 0.01 pounds
4.8 g / 0.0 N
safe
10 mm 154 Gs
15.4 mT
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
safe
15 mm 63 Gs
6.3 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
safe
20 mm 32 Gs
3.2 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
30 mm 12 Gs
1.2 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe
50 mm 3 Gs
0.3 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
safe

Table 2: Shear load (vertical surface)
MW 5x15 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.10 kg / 0.21 pounds
96.0 g / 0.9 N
1 mm Stal (~0.2) 0.04 kg / 0.08 pounds
38.0 g / 0.4 N
2 mm Stal (~0.2) 0.01 kg / 0.03 pounds
14.0 g / 0.1 N
3 mm Stal (~0.2) 0.00 kg / 0.01 pounds
4.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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 (shearing) - behavior on slippery surfaces
MW 5x15 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.14 kg / 0.32 pounds
144.0 g / 1.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.10 kg / 0.21 pounds
96.0 g / 0.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.05 kg / 0.11 pounds
48.0 g / 0.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.24 kg / 0.53 pounds
240.0 g / 2.4 N

Table 4: Steel thickness (substrate influence) - power losses
MW 5x15 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.05 kg / 0.11 pounds
48.0 g / 0.5 N
1 mm
25%
0.12 kg / 0.26 pounds
120.0 g / 1.2 N
2 mm
50%
0.24 kg / 0.53 pounds
240.0 g / 2.4 N
3 mm
75%
0.36 kg / 0.79 pounds
360.0 g / 3.5 N
5 mm
100%
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
10 mm
100%
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
11 mm
100%
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
12 mm
100%
0.48 kg / 1.06 pounds
480.0 g / 4.7 N

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 5x15 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.48 kg / 1.06 pounds
480.0 g / 4.7 N
OK
40 °C -2.2% 0.47 kg / 1.03 pounds
469.4 g / 4.6 N
OK
60 °C -4.4% 0.46 kg / 1.01 pounds
458.9 g / 4.5 N
OK
80 °C -6.6% 0.45 kg / 0.99 pounds
448.3 g / 4.4 N
100 °C -28.8% 0.34 kg / 0.75 pounds
341.8 g / 3.4 N

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 5x15 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.49 kg / 9.90 pounds
6 154 Gs
0.67 kg / 1.49 pounds
674 g / 6.6 N
N/A
1 mm 2.91 kg / 6.42 pounds
9 810 Gs
0.44 kg / 0.96 pounds
437 g / 4.3 N
2.62 kg / 5.78 pounds
~0 Gs
2 mm 1.77 kg / 3.90 pounds
7 646 Gs
0.27 kg / 0.59 pounds
265 g / 2.6 N
1.59 kg / 3.51 pounds
~0 Gs
3 mm 1.05 kg / 2.31 pounds
5 880 Gs
0.16 kg / 0.35 pounds
157 g / 1.5 N
0.94 kg / 2.08 pounds
~0 Gs
5 mm 0.37 kg / 0.82 pounds
3 507 Gs
0.06 kg / 0.12 pounds
56 g / 0.5 N
0.34 kg / 0.74 pounds
~0 Gs
10 mm 0.04 kg / 0.10 pounds
1 213 Gs
0.01 kg / 0.01 pounds
7 g / 0.1 N
0.04 kg / 0.09 pounds
~0 Gs
20 mm 0.00 kg / 0.01 pounds
309 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 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
24 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
16 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
11 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
8 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
6 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs

Table 7: Hazards (electronics) - precautionary measures
MW 5x15 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.5 cm
Hearing aid 10 Gs (1.0 mT) 3.5 cm
Timepiece 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) 1.0 cm

Table 8: Dynamics (kinetic energy) - collision effects
MW 5x15 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 14.87 km/h
(4.13 m/s)
0.02 J
30 mm 25.74 km/h
(7.15 m/s)
0.06 J
50 mm 33.23 km/h
(9.23 m/s)
0.09 J
100 mm 47.00 km/h
(13.06 m/s)
0.19 J

Table 9: Coating parameters (durability)
MW 5x15 / 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 5x15 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 382 Mx 13.8 µWb
Pc Coefficient 1.38 High (Stable)

Table 11: Physics of underwater searching
MW 5x15 / N38

Environment Effective steel pull Effect
Air (land) 0.48 kg Standard
Water (riverbed) 0.55 kg
(+0.07 kg buoyancy gain)
+14.5%
Warning: 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

*Note: On a vertical wall, the magnet retains only a fraction of its nominal pull.

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) drastically limits 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) = 1.38

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
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%
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: 010084-2026
Magnet Unit Converter
Pulling force

Magnetic Field

Other products

The presented product is an exceptionally strong cylindrical magnet, made from advanced NdFeB material, which, at dimensions of Ø5x15 mm, guarantees the highest energy density. This specific item boasts 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. 0.48 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 4.68 N with a weight of only 2.21 g, this rod 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 stability 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 N38 are suitable 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 (Ø5x15), 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 5 mm and height 15 mm. The key parameter here is the lifting capacity amounting to approximately 0.48 kg (force ~4.68 N), which, with such defined 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 5 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 diametrically if your project requires it.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Advantages

Besides their remarkable strength, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
  • Neodymium magnets are characterized by remarkably resistant to demagnetization caused by magnetic disturbances,
  • By using a shiny coating of silver, the element presents an professional look,
  • Magnets are characterized by excellent magnetic induction on the active area,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of precise forming and modifying to concrete needs,
  • Versatile presence in modern technologies – they find application in computer drives, electric drive systems, precision medical tools, also other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Limitations

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Limited possibility of making threads in the magnet and complex shapes - preferred is a housing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Maximum lifting capacity of the magnetwhat it depends on?

The lifting capacity listed is a result of laboratory testing executed under the following configuration:
  • on a base made of mild steel, optimally conducting the magnetic field
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • without the slightest air gap between the magnet and steel
  • for force applied at a right angle (in the magnet axis)
  • at ambient temperature room level

Key elements affecting lifting force

Effective lifting capacity is affected by working environment parameters, such as (from priority):
  • Clearance – the presence of any layer (paint, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Steel type – mild steel attracts best. Higher carbon content reduce magnetic permeability and holding force.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Moreover, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Safe handling of neodymium magnets
Power loss in heat

Standard neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. Damage is permanent.

Finger safety

Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Do not give to children

NdFeB magnets are not intended for children. Accidental ingestion of a few magnets can lead to them pinching intestinal walls, which constitutes a critical condition and requires immediate surgery.

GPS Danger

Remember: rare earth magnets produce a field that interferes with sensitive sensors. Keep a separation from your mobile, tablet, and GPS.

Metal Allergy

Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, prevent direct skin contact and choose versions in plastic housing.

ICD Warning

Health Alert: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Machining danger

Drilling and cutting of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Magnets are brittle

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Handling rules

Before starting, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Safe distance

Intense magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.

Warning! 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