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MW 15x5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010031

GTIN/EAN: 5906301810308

5.00
Load capacity 5.39 kg / 52.83 N Magnetic Induction 343.70 mT / 3437 Gs
Diameter Ø
15 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
6.63 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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price from 1 pcs
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price from 250 pcs
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3.01 zł
price from 1000 pcs
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2.81 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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Product card - 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 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

Engineering analysis of the assembly - report

These information are the outcome of a mathematical analysis. Values rely on algorithms for the class Nd2Fe14B. Operational conditions may differ from theoretical values. Treat these calculations as a reference point when designing systems.

Table 1: Static force (pull vs distance) - power drop
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 pounds
5390.0 g / 52.9 N
warning
1 mm 3054 Gs
305.4 mT
4.26 kg / 9.39 pounds
4258.2 g / 41.8 N
warning
2 mm 2633 Gs
263.3 mT
3.17 kg / 6.98 pounds
3165.4 g / 31.1 N
warning
3 mm 2221 Gs
222.1 mT
2.25 kg / 4.96 pounds
2251.5 g / 22.1 N
warning
5 mm 1521 Gs
152.1 mT
1.06 kg / 2.33 pounds
1056.2 g / 10.4 N
low risk
10 mm 585 Gs
58.5 mT
0.16 kg / 0.35 pounds
156.5 g / 1.5 N
low risk
15 mm 260 Gs
26.0 mT
0.03 kg / 0.07 pounds
30.8 g / 0.3 N
low risk
20 mm 133 Gs
13.3 mT
0.01 kg / 0.02 pounds
8.1 g / 0.1 N
low risk
30 mm 47 Gs
4.7 mT
0.00 kg / 0.00 pounds
1.0 g / 0.0 N
low risk
50 mm 12 Gs
1.2 mT
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
low risk

Table 2: Vertical hold (vertical surface)
MW 15x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.08 kg / 2.38 pounds
1078.0 g / 10.6 N
1 mm Stal (~0.2) 0.85 kg / 1.88 pounds
852.0 g / 8.4 N
2 mm Stal (~0.2) 0.63 kg / 1.40 pounds
634.0 g / 6.2 N
3 mm Stal (~0.2) 0.45 kg / 0.99 pounds
450.0 g / 4.4 N
5 mm Stal (~0.2) 0.21 kg / 0.47 pounds
212.0 g / 2.1 N
10 mm Stal (~0.2) 0.03 kg / 0.07 pounds
32.0 g / 0.3 N
15 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 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: Vertical assembly (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 pounds
1617.0 g / 15.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.08 kg / 2.38 pounds
1078.0 g / 10.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.54 kg / 1.19 pounds
539.0 g / 5.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.70 kg / 5.94 pounds
2695.0 g / 26.4 N

Table 4: Steel thickness (substrate influence) - 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 pounds
539.0 g / 5.3 N
1 mm
25%
1.35 kg / 2.97 pounds
1347.5 g / 13.2 N
2 mm
50%
2.70 kg / 5.94 pounds
2695.0 g / 26.4 N
3 mm
75%
4.04 kg / 8.91 pounds
4042.5 g / 39.7 N
5 mm
100%
5.39 kg / 11.88 pounds
5390.0 g / 52.9 N
10 mm
100%
5.39 kg / 11.88 pounds
5390.0 g / 52.9 N
11 mm
100%
5.39 kg / 11.88 pounds
5390.0 g / 52.9 N
12 mm
100%
5.39 kg / 11.88 pounds
5390.0 g / 52.9 N

Table 5: Thermal stability (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 pounds
5390.0 g / 52.9 N
OK
40 °C -2.2% 5.27 kg / 11.62 pounds
5271.4 g / 51.7 N
OK
60 °C -4.4% 5.15 kg / 11.36 pounds
5152.8 g / 50.5 N
80 °C -6.6% 5.03 kg / 11.10 pounds
5034.3 g / 49.4 N
100 °C -28.8% 3.84 kg / 8.46 pounds
3837.7 g / 37.6 N

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

Table 7: Hazards (implants) - warnings
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
Timepiece 20 Gs (2.0 mT) 4.5 cm
Mobile device 40 Gs (4.0 mT) 3.5 cm
Car key 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) - warning
MW 15x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 25.33 km/h
(7.04 m/s)
0.16 J
30 mm 25.70 km/h
(7.14 m/s)
0.17 J
50 mm 25.70 km/h
(7.14 m/s)
0.17 J
100 mm 25.70 km/h
(7.14 m/s)
0.17 J

Table 9: Corrosion resistance
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: Construction 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: Hydrostatics and buoyancy
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%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

1. Sliding resistance

*Warning: On a vertical surface, the magnet retains just a fraction of its max power.

2. Efficiency vs thickness

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

3. Power loss vs temp

*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) = 0.44

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%

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: 010031-2026
Quick Unit Converter

Pulling force


Magnetic Induction

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The offered product is an incredibly powerful cylindrical magnet, made from modern NdFeB material, which, with dimensions of Ø15x5 mm, guarantees optimal power. The MW 15x5 / N38 model is characterized by high dimensional repeatability and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 5.39 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, 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 sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 52.83 N with a weight of only 6.63 g, this rod is indispensable in electronics and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger 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 key parameter here is the holding force amounting to approximately 5.39 kg (force ~52.83 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 5 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.

Strengths as well as weaknesses of rare earth magnets.

Pros

Apart from their superior power, neodymium magnets have these key benefits:
  • They retain attractive force for nearly ten years – the drop is just ~1% (according to analyses),
  • They show high resistance to demagnetization induced by external disturbances,
  • The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to look better,
  • Neodymium magnets ensure maximum magnetic induction on a small area, which allows for strong attraction,
  • 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 precise shaping as well as adapting to concrete applications,
  • Fundamental importance in electronics industry – they serve a role in mass storage devices, electric drive systems, advanced medical instruments, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in small systems

Limitations

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We suggest casing - magnetic mount, due to difficulties in producing threads inside the magnet and complex shapes.
  • Potential hazard to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these magnets can be problematic in diagnostics medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Detachment force of the magnet in optimal conditionswhat contributes to it?

The load parameter shown represents the peak performance, measured under optimal environment, specifically:
  • with the use of a sheet made of special test steel, ensuring full magnetic saturation
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with an polished touching surface
  • under conditions of gap-free contact (metal-to-metal)
  • under perpendicular application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Effective lifting capacity impacted by specific conditions, including (from priority):
  • Air gap (betwixt the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Angle of force application – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Material type – the best choice is high-permeability steel. Stainless steels may attract less.
  • Base smoothness – the more even the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate reduces the load capacity.

Precautions when working with NdFeB magnets
Swallowing risk

Absolutely store magnets away from children. Ingestion danger is high, and the effects of magnets connecting inside the body are tragic.

Protect data

Avoid bringing magnets close to a wallet, computer, or screen. The magnetism can destroy these devices and erase data from cards.

Thermal limits

Watch the temperature. Heating the magnet to high heat will ruin its properties and pulling force.

GPS and phone interference

A strong magnetic field interferes with the functioning of compasses in smartphones and navigation systems. Keep magnets near a smartphone to prevent damaging the sensors.

Handling rules

Be careful. Rare earth magnets act from a distance and connect with massive power, often faster than you can react.

Allergic reactions

Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact or choose coated magnets.

Fire warning

Mechanical processing of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

ICD Warning

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

Bone fractures

Watch your fingers. Two large magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Be careful!

Eye protection

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting shards into the air. We recommend safety glasses.

Attention! More info about hazards in the article: Magnet Safety Guide.