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MW 15x5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010031

GTIN/EAN: 5906301810308

5.00

Diameter Ø

15 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

6.63 g

Magnetization Direction

↑ axial

Load capacity

5.39 kg / 52.83 N

Magnetic Induction

343.70 mT / 3437 Gs

Coating

[NiCuNi] Nickel

3.20 with VAT / pcs + price for transport

2.60 ZŁ net + 23% VAT / pcs

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Technical data - MW 15x5 / N38 - cylindrical magnet

Specification / characteristics - MW 15x5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010031
GTIN/EAN 5906301810308
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 5 mm [±0,1 mm]
Weight 6.63 g
Magnetization Direction ↑ axial
Load capacity ~ ? 5.39 kg / 52.83 N
Magnetic Induction ~ ? 343.70 mT / 3437 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 15x5 / 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 simulation of the assembly - data

Presented information are the direct effect of a physical calculation. Results are based on algorithms for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Treat these calculations as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - characteristics
MW 15x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3436 Gs
343.6 mT
5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
medium risk
1 mm 3054 Gs
305.4 mT
4.26 kg / 9.39 lbs
4258.2 g / 41.8 N
medium risk
2 mm 2633 Gs
263.3 mT
3.17 kg / 6.98 lbs
3165.4 g / 31.1 N
medium risk
3 mm 2221 Gs
222.1 mT
2.25 kg / 4.96 lbs
2251.5 g / 22.1 N
medium risk
5 mm 1521 Gs
152.1 mT
1.06 kg / 2.33 lbs
1056.2 g / 10.4 N
low risk
10 mm 585 Gs
58.5 mT
0.16 kg / 0.35 lbs
156.5 g / 1.5 N
low risk
15 mm 260 Gs
26.0 mT
0.03 kg / 0.07 lbs
30.8 g / 0.3 N
low risk
20 mm 133 Gs
13.3 mT
0.01 kg / 0.02 lbs
8.1 g / 0.1 N
low risk
30 mm 47 Gs
4.7 mT
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
low risk
50 mm 12 Gs
1.2 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
low risk

Table 2: Sliding load (wall)
MW 15x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.08 kg / 2.38 lbs
1078.0 g / 10.6 N
1 mm Stal (~0.2) 0.85 kg / 1.88 lbs
852.0 g / 8.4 N
2 mm Stal (~0.2) 0.63 kg / 1.40 lbs
634.0 g / 6.2 N
3 mm Stal (~0.2) 0.45 kg / 0.99 lbs
450.0 g / 4.4 N
5 mm Stal (~0.2) 0.21 kg / 0.47 lbs
212.0 g / 2.1 N
10 mm Stal (~0.2) 0.03 kg / 0.07 lbs
32.0 g / 0.3 N
15 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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 15x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.62 kg / 3.56 lbs
1617.0 g / 15.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.08 kg / 2.38 lbs
1078.0 g / 10.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.54 kg / 1.19 lbs
539.0 g / 5.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.70 kg / 5.94 lbs
2695.0 g / 26.4 N

Table 4: Steel thickness (saturation) - sheet metal selection
MW 15x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.54 kg / 1.19 lbs
539.0 g / 5.3 N
1 mm
25%
1.35 kg / 2.97 lbs
1347.5 g / 13.2 N
2 mm
50%
2.70 kg / 5.94 lbs
2695.0 g / 26.4 N
3 mm
75%
4.04 kg / 8.91 lbs
4042.5 g / 39.7 N
5 mm
100%
5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
10 mm
100%
5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
11 mm
100%
5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
12 mm
100%
5.39 kg / 11.88 lbs
5390.0 g / 52.9 N

Table 5: Working in heat (stability) - thermal limit
MW 15x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
OK
40 °C -2.2% 5.27 kg / 11.62 lbs
5271.4 g / 51.7 N
OK
60 °C -4.4% 5.15 kg / 11.36 lbs
5152.8 g / 50.5 N
80 °C -6.6% 5.03 kg / 11.10 lbs
5034.3 g / 49.4 N
100 °C -28.8% 3.84 kg / 8.46 lbs
3837.7 g / 37.6 N

Table 6: Two magnets (attraction) - field range
MW 15x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 12.86 kg / 28.35 lbs
4 954 Gs
1.93 kg / 4.25 lbs
1929 g / 18.9 N
N/A
1 mm 11.54 kg / 25.43 lbs
6 508 Gs
1.73 kg / 3.81 lbs
1730 g / 17.0 N
10.38 kg / 22.89 lbs
~0 Gs
2 mm 10.16 kg / 22.40 lbs
6 107 Gs
1.52 kg / 3.36 lbs
1524 g / 14.9 N
9.14 kg / 20.16 lbs
~0 Gs
3 mm 8.82 kg / 19.44 lbs
5 689 Gs
1.32 kg / 2.92 lbs
1322 g / 13.0 N
7.93 kg / 17.49 lbs
~0 Gs
5 mm 6.40 kg / 14.11 lbs
4 847 Gs
0.96 kg / 2.12 lbs
960 g / 9.4 N
5.76 kg / 12.70 lbs
~0 Gs
10 mm 2.52 kg / 5.56 lbs
3 042 Gs
0.38 kg / 0.83 lbs
378 g / 3.7 N
2.27 kg / 5.00 lbs
~0 Gs
20 mm 0.37 kg / 0.82 lbs
1 171 Gs
0.06 kg / 0.12 lbs
56 g / 0.5 N
0.34 kg / 0.74 lbs
~0 Gs
50 mm 0.01 kg / 0.01 lbs
153 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.01 lbs
95 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
63 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
44 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
32 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
23 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Protective zones (electronics) - precautionary measures
MW 15x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 7.0 cm
Hearing aid 10 Gs (1.0 mT) 5.5 cm
Mechanical watch 20 Gs (2.0 mT) 4.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.5 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Collisions (kinetic energy) - collision effects
MW 15x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 29.27 km/h
(8.13 m/s)
0.22 J
30 mm 49.81 km/h
(13.84 m/s)
0.63 J
50 mm 64.30 km/h
(17.86 m/s)
1.06 J
100 mm 90.93 km/h
(25.26 m/s)
2.12 J

Table 9: Surface protection spec
MW 15x5 / 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 15x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 428 Mx 64.3 µWb
Pc Coefficient 0.44 Low (Flat)

Table 11: Underwater work (magnet fishing)
MW 15x5 / N38

Environment Effective steel pull Effect
Air (land) 5.39 kg Standard
Water (riverbed) 6.17 kg
(+0.78 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 just a fraction of its perpendicular strength.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.

3. Temperature resistance

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.44

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
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%
Ecology and recycling (GPSR)
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: 010031-2026
Quick Unit Converter
Pulling force

Magnetic Field

Other offers

The presented product is an incredibly powerful cylinder magnet, produced from advanced NdFeB material, which, at dimensions of Ø15x5 mm, guarantees optimal power. The MW 15x5 / N38 component boasts an accuracy of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 5.39 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 52.83 N with a weight of only 6.63 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 chipping the coating of this precision component. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel 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 operational stability. If you need the strongest magnets in the same volume (Ø15x5), 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 15 mm and height 5 mm. The value of 52.83 N means that the magnet is capable of holding a weight many times exceeding its own mass of 6.63 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 15 mm. 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 through the diameter if your project requires it.

Pros and cons of rare earth magnets.

Benefits

Apart from their consistent holding force, neodymium magnets have these key benefits:
  • They retain magnetic properties for around ten years – the drop is just ~1% (in theory),
  • Neodymium magnets remain remarkably resistant to magnetic field loss caused by external field sources,
  • A magnet with a shiny gold surface looks better,
  • Magnetic induction on the working part of the magnet turns out to be impressive,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • In view of the option of flexible shaping and customization to unique solutions, magnetic components can be manufactured in a variety of geometric configurations, which expands the range of possible applications,
  • Versatile presence in high-tech industry – they are utilized in magnetic memories, drive modules, advanced medical instruments, and modern systems.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Cons

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
  • 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.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • We recommend cover - magnetic mount, due to difficulties in creating threads inside the magnet and complicated shapes.
  • Health risk resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these magnets are able to complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Highest magnetic holding forcewhat it depends on?

Breakaway force is the result of a measurement for ideal contact conditions, including:
  • using a base made of mild steel, functioning as a ideal flux conductor
  • whose thickness reaches at least 10 mm
  • with an ground touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • for force applied at a right angle (in the magnet axis)
  • in neutral thermal conditions

Lifting capacity in real conditions – factors

It is worth knowing that the magnet holding will differ depending on elements below, in order of importance:
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Material type – ideal substrate is high-permeability steel. Cast iron may attract less.
  • Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity was determined with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.

Warnings
Medical interference

People with a pacemaker should keep an large gap from magnets. The magnetism can interfere with the operation of the implant.

Sensitization to coating

A percentage of the population suffer from a sensitization to Ni, which is the common plating for neodymium magnets. Extended handling might lead to skin redness. We recommend wear safety gloves.

Electronic devices

Do not bring magnets near a wallet, laptop, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Thermal limits

Regular neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. Damage is permanent.

Handling rules

Before starting, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Be predictive.

Dust explosion hazard

Powder generated during cutting of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

Fragile material

Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Eye protection is mandatory.

Choking Hazard

Only for adults. Tiny parts can be swallowed, leading to serious injuries. Keep away from children and animals.

Compass and GPS

A powerful magnetic field negatively affects the functioning of compasses in phones and navigation systems. Do not bring magnets close to a smartphone to prevent breaking the sensors.

Crushing force

Big blocks can break fingers instantly. Do not put your hand betwixt two attracting surfaces.

Important! Details about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98