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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

technical details »

1.107 ZŁ with VAT / pcs + price for transport

0.900 ZŁ net + 23% VAT / pcs

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Technical data - 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 - data

These data are the direct effect of a physical simulation. Results rely on algorithms for the material Nd2Fe14B. Real-world conditions may differ from theoretical values. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
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 lbs
480.0 g / 4.7 N
 safe
1 mm 3823 Gs
382.3 mT
 0.19 kg / 0.42 lbs
189.1 g / 1.9 N
 safe
2 mm 2261 Gs
226.1 mT
 0.07 kg / 0.15 lbs
66.1 g / 0.6 N
 safe
3 mm 1378 Gs
137.8 mT
 0.02 kg / 0.05 lbs
24.6 g / 0.2 N
 safe
5 mm 607 Gs
60.7 mT
 0.00 kg / 0.01 lbs
4.8 g / 0.0 N
 safe
10 mm 154 Gs
15.4 mT
 0.00 kg / 0.00 lbs
0.3 g / 0.0 N
 safe
15 mm 63 Gs
6.3 mT
 0.00 kg / 0.00 lbs
0.1 g / 0.0 N
 safe
20 mm 32 Gs
3.2 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
30 mm 12 Gs
1.2 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
50 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 safe
Grip strength drops sharply per each millimeter of distance. Keep in mind that every additional insulation layer (e.g., dirt, paint, rust) significantly weakens the grip. Magnets hold optimally in perfect adhesion; gap nullifies the force. See how quickly the pull force fall, when the product does not adhere tightly to the steel surface. When calculating the mounting, avoid additional spacers.

Table 2: Sliding 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 lbs
96.0 g / 0.9 N
1 mm Stal (~0.2) 0.04 kg / 0.08 lbs
38.0 g / 0.4 N
2 mm Stal (~0.2) 0.01 kg / 0.03 lbs
14.0 g / 0.1 N
3 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 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
The table below defines the theoretical shear load sufficient to cause the shifting of the magnet vertically on a upright metal surface (considering standard friction). The holding force is a function of the separation distance between the magnet and the metal.

Table 3: Vertical assembly (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 lbs
144.0 g / 1.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.10 kg / 0.21 lbs
96.0 g / 0.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.05 kg / 0.11 lbs
48.0 g / 0.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.24 kg / 0.53 lbs
240.0 g / 2.4 N
When mounting a holder on a upright wall (e.g., a fridge), it will only hold barely about 1/5 of nominal attraction strength. Gravity as well as a weak degree of grip influence the fact that holders slip faster than they pull off. Planning a hanger? Note that the sliding force is much weaker than the perpendicular breakaway force. On a slippery surface, the holder will slide down under a much lighter cargo. Application of an anti-slip coating can effectively raise the stability.

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 lbs
48.0 g / 0.5 N
1 mm
25%
 0.12 kg / 0.26 lbs
120.0 g / 1.2 N
2 mm
50%
 0.24 kg / 0.53 lbs
240.0 g / 2.4 N
3 mm
75%
 0.36 kg / 0.79 lbs
360.0 g / 3.5 N
5 mm
100%
 0.48 kg / 1.06 lbs
480.0 g / 4.7 N
10 mm
100%
 0.48 kg / 1.06 lbs
480.0 g / 4.7 N
11 mm
100%
 0.48 kg / 1.06 lbs
480.0 g / 4.7 N
12 mm
100%
 0.48 kg / 1.06 lbs
480.0 g / 4.7 N
A thin sheet cannot conduct the full magnetic flux, which squanders power of the holder. If you attach a powerful product to a too thin substrate, the flux will pass right through and the pull force will drop sharply. To achieve 100% of this magnet's power, you require a sufficiently solid piece of steel. The saturation phenomenon causes that on sheet metal structures (e.g., car bodies), the magnet holds weaker. We advise picking the steel thickness according to the table below.

Table 5: Thermal resistance (stability) - power drop
MW 5x15 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.48 kg / 1.06 lbs
480.0 g / 4.7 N
 OK
40 °C -2.2% 0.47 kg / 1.03 lbs
469.4 g / 4.6 N
 OK
60 °C -4.4% 0.46 kg / 1.01 lbs
458.9 g / 4.5 N
 OK
80 °C -6.6% 0.45 kg / 0.99 lbs
448.3 g / 4.4 N
100 °C -28.8% 0.34 kg / 0.75 lbs
341.8 g / 3.4 N
Standard neodymium magnets change their properties power after exceeding the maximum temperature. Protect against heat – high temperature can permanently destroy this product. As the temperature rises, the magnet's capacity briefly decreases. Do not use this product close to ovens higher than its safe range. Exceeding the critical threshold will lead to irreversible degradation of magnetic properties.
*Important note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (low Pc) may lose charge permanently under lower heat stress than taller cylinders. Warning indicator in the table points to a risk of irreversible loss for this specific geometry.

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

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.49 kg / 9.90 lbs
6 154 Gs
0.67 kg / 1.49 lbs
674 g / 6.6 N
 N/A
1 mm 2.91 kg / 6.42 lbs
9 810 Gs
0.44 kg / 0.96 lbs
437 g / 4.3 N
 2.62 kg / 5.78 lbs
~0 Gs
2 mm 1.77 kg / 3.90 lbs
7 646 Gs
0.27 kg / 0.59 lbs
265 g / 2.6 N
 1.59 kg / 3.51 lbs
~0 Gs
3 mm 1.05 kg / 2.31 lbs
5 880 Gs
0.16 kg / 0.35 lbs
157 g / 1.5 N
 0.94 kg / 2.08 lbs
~0 Gs
5 mm 0.37 kg / 0.82 lbs
3 507 Gs
0.06 kg / 0.12 lbs
56 g / 0.5 N
 0.34 kg / 0.74 lbs
~0 Gs
10 mm 0.04 kg / 0.10 lbs
1 213 Gs
0.01 kg / 0.01 lbs
7 g / 0.1 N
 0.04 kg / 0.09 lbs
~0 Gs
20 mm 0.00 kg / 0.01 lbs
309 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
37 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
24 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
16 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
11 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
8 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
6 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two magnetic products interact from a significantly greater distance than a magnet and sheet setup. The connection of two magnets produces a massive flux and a larger range of action. Designing a strong closure? Utilize two neodymiums instead of one magnet and a steel. Be careful that when connecting a pair of magnets, the collision energy is huge. The levitation is marginally weaker than the connection force, but still impressive.
*The magnetic induction for N-N configuration drops to ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Attention: Results refer to sliding force of two same neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Hazards (electronics) - warnings
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
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) 1.0 cm
A strong magnetic field poses a large risk to electronics and medical implants. These NdFeB products produce a flux that disrupts operation of digital equipment. Be aware: the invisible magnetic field penetrates the body and housings. Special caution must be taken by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, remotes, speakers, and displays. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - warning
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
Neodymium magnets are very brittle – a strong collision with metal causes immediate chipping. Watch the impact speed – a neodymium left loose becomes dangerous. Striking energy can cause material chips or dangerous crushing to fingers. Always hold the magnet during installation so it doesn't hit violently against the steel surface. A collision at high speed ends with a crack of the magnet. Use safety goggles when handling with powerful specimens.

Table 9: Surface protection spec
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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Flux)
MW 5x15 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 382 Mx 13.8 µWb
Pc Coefficient 1.38 High (Stable)
Total magnetic flux emitted by the pole surface. Key data for generator designers as well as sensors. Pc value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
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%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Shear force

*Caution: On a vertical surface, the magnet holds just a fraction of its nominal pull.

2. Efficiency vs thickness

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

3. Power loss vs temp

*For N38 grade, the safety 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 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%
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
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The presented product is an exceptionally strong cylindrical magnet, manufactured from advanced NdFeB material, which, with dimensions of Ø5x15 mm, guarantees maximum efficiency. The MW 5x15 / N38 model is characterized by high dimensional repeatability and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.48 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is created for building generators, advanced Hall effect sensors, and efficient magnetic separators, where field concentration 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 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 automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability 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 the strongest magnets in the same volume (Ø5x15), 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 Ø5x15 mm, which, at a weight of 2.21 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 0.48 kg (force ~4.68 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it 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 5 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 diametrically if your project requires it.

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Besides their remarkable pulling force, neodymium magnets offer the following advantages:
  • Their magnetic field remains stable, and after around ten years it drops only by ~1% (theoretically),
  • They are resistant to demagnetization induced by presence of other magnetic fields,
  • A magnet with a metallic silver surface looks better,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is one of their assets,
  • 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...
  • Due to the potential of precise forming and adaptation to unique requirements, magnetic components can be manufactured in a wide range of geometric configurations, which expands the range of possible applications,
  • Versatile presence in future technologies – they serve a role in HDD drives, drive modules, diagnostic systems, as well as modern systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Disadvantages

Disadvantages of NdFeB magnets:
  • At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power 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
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of making threads in the magnet and complicated shapes - recommended is casing - mounting mechanism.
  • Health risk to health – tiny shards of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Maximum lifting force for a neodymium magnet – what it depends on?

The specified lifting capacity concerns the limit force, measured under ideal test conditions, specifically:
  • on a plate made of mild steel, effectively closing the magnetic flux
  • with a cross-section no less than 10 mm
  • characterized by even structure
  • with total lack of distance (without coatings)
  • under perpendicular force direction (90-degree angle)
  • at conditions approx. 20°C

Practical aspects of lifting capacity – factors

Please note that the magnet holding may be lower influenced by elements below, starting with the most relevant:
  • Air gap (betwixt the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. High carbon content worsen the attraction effect.
  • Surface finish – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature influence – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was determined with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Warnings
Bone fractures

Big blocks can crush fingers in a fraction of a second. Under no circumstances place your hand betwixt two attracting surfaces.

Product not for children

Adult use only. Small elements pose a choking risk, causing serious injuries. Keep out of reach of kids and pets.

Medical interference

Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Avoid contact if allergic

Certain individuals have a contact allergy to nickel, which is the common plating for neodymium magnets. Frequent touching might lead to skin redness. We recommend wear protective gloves.

Protect data

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

Combustion hazard

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

Power loss in heat

Standard neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. The loss of strength is permanent.

Magnetic interference

Be aware: rare earth magnets generate a field that interferes with sensitive sensors. Keep a separation from your mobile, device, and navigation systems.

Caution required

Handle with care. Neodymium magnets attract from a long distance and snap with huge force, often quicker than you can react.

Magnet fragility

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

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