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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

see technical data »

1.107 ZŁ with VAT / pcs + price for transport

0.900 ZŁ net + 23% VAT / pcs

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Technical of the product - 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

Physical modeling of the product - report

The following data constitute the direct effect of a physical calculation. Values rely on models for the class Nd2Fe14B. Actual parameters might slightly differ from theoretical values. Treat these calculations as a reference point when designing systems.

Table 1: Static force (force vs distance) - 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 pounds
480.0 g / 4.7 N
 weak grip
1 mm 3823 Gs
382.3 mT
 0.19 kg / 0.42 pounds
189.1 g / 1.9 N
 weak grip
2 mm 2261 Gs
226.1 mT
 0.07 kg / 0.15 pounds
66.1 g / 0.6 N
 weak grip
3 mm 1378 Gs
137.8 mT
 0.02 kg / 0.05 pounds
24.6 g / 0.2 N
 weak grip
5 mm 607 Gs
60.7 mT
 0.00 kg / 0.01 pounds
4.8 g / 0.0 N
 weak grip
10 mm 154 Gs
15.4 mT
 0.00 kg / 0.00 pounds
0.3 g / 0.0 N
 weak grip
15 mm 63 Gs
6.3 mT
 0.00 kg / 0.00 pounds
0.1 g / 0.0 N
 weak grip
20 mm 32 Gs
3.2 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 weak grip
30 mm 12 Gs
1.2 mT
 0.00 kg / 0.00 pounds
0.0 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
Pulling power weakens sharply per each millimeter of distance. Keep in mind that every additional insulation layer (e.g., dirt, paint, veneer) strongly diminishes the holding power. Magnets operate strongest at the point of direct contact; gap weakens the power. Observe how flashily the load capacity fall, when the magnet does not adhere flatly to the steel surface. When designing the assembly, eliminate unnecessary gaps.

Table 2: Vertical force (wall)
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
This section defines the estimated force required to initiate the downward movement of the magnet vertically on a vertical steel plate (assuming standard friction coefficient). This value is a function of the air gap between the magnet and the metal.

Table 3: Wall mounting (shearing) - vertical pull
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
When hanging a holder on a upright wall (e.g., a fridge), it you can count on barely approx. 20%-30% of its maximum pull force. Gravitational force as well as a weak degree of grip cause that magnets slip faster than they pop off the substrate. Designing a wall mount? Remember that the sliding force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the holder will slide down under a much lighter weight. Using a rubber pad can drastically raise the stability.

Table 4: Material efficiency (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
A thin sheet is unable to conduct the full magnetic flux, which squanders power of the holder. Should you attach a powerful product to a thin surface, the magnetism will pass right through and the pull force will drop sharply. To squeeze the maximum of this neodymium's potential, you require a sufficiently solid element of metal. The material oversaturation causes that on sheet metal structures (e.g., thin profiles), the magnet holds weaker. We recommend selecting the steel dimension from these parameters.

Table 5: Thermal stability (material behavior) - 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 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
Classic neodymiums lose power past the thermal threshold. Protect against heat – heat can irreversibly demagnetize this magnet. As the temperature rises, the neodymium's capacity briefly drops. Refrain from using this product in hot environments exceeding its safe range. Exceeding the critical threshold will lead to irreversible degradation of magnetic properties.
*Important note: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (low permeance coefficient) risk losing magnetic properties sooner than long magnets. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field collision
MW 5x15 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (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
Two magnetic products attract each other from a much further distance than a magnet and sheet setup. Such a system of two magnets creates a more powerful interaction and a larger range of action. Designing a powerful holder? Apply two magnets instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the collision energy is extreme. The levitation is slightly lower than the connection force, but still significant.
*The magnetic induction between like poles drops to ~0 Gs in the exact middle of the gap (due to field cancellation).
Important: Estimates demonstrate shear force of a pair of same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Protective zones (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
Mobile device 40 Gs (4.0 mT) 2.0 cm
Remote 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 as well as medical implants. These neodymiums generate a field that disrupts operation of sensitive medical devices. Notice: the unseen radiation passes through tissues and plastic. Exceptional care must be exercised by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

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 violent impact against metal risks their cracking. Control the attraction moment – a neodymium left loose becomes dangerous. Impact energy can trigger coating fragments or injury to skin. Always hold the magnet during installation so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Use safety goggles when working with powerful specimens.

Table 9: Anti-corrosion coating 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)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction 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 passing through the magnet pole. Key data in coil applications as well as sensors. Pc value defines the magnet's operating point.

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: 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. Buoyancy helps in lifting finds.
1. Shear force

*Caution: On a vertical wall, the magnet retains merely ~20% of its perpendicular strength.

2. Steel thickness impact

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

3. Power loss vs temp

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.38

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.

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: 010084-2026
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This product is an incredibly powerful rod magnet, produced from durable NdFeB material, which, with dimensions of Ø5x15 mm, guarantees maximum efficiency. This specific item is characterized by an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 0.48 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. 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 low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 5.1 mm) using two-component epoxy glues. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are strong enough for 90% of applications in automation and machine building, where extreme miniaturization with maximum force is not required. 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.
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 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 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 diametrically if your project requires it.

Pros and cons of neodymium magnets.

Strengths

Apart from their notable magnetic energy, neodymium magnets have these key benefits:
  • Their power is maintained, and after around ten years it decreases only by ~1% (theoretically),
  • Neodymium magnets are remarkably resistant to magnetic field loss caused by magnetic disturbances,
  • In other words, due to the shiny layer of gold, the element gains a professional look,
  • Magnets are characterized by maximum magnetic induction on the surface,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • Thanks to modularity in shaping and the ability to adapt to complex applications,
  • Wide application in modern industrial fields – they are utilized in HDD drives, motor assemblies, medical equipment, also modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets: application proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also increases their durability
  • Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • We recommend cover - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these devices are able to be problematic in diagnostics medical when they are in the body.
  • Due to expensive raw materials, their price exceeds standard values,

Lifting parameters

Best holding force of the magnet in ideal parameters – what affects it?

Information about lifting capacity was defined for the most favorable conditions, assuming:
  • using a sheet made of mild steel, acting as a ideal flux conductor
  • whose thickness is min. 10 mm
  • characterized by lack of roughness
  • with zero gap (no paint)
  • during detachment in a direction perpendicular to the mounting surface
  • in stable room temperature

Magnet lifting force in use – key factors

Effective lifting capacity impacted by specific conditions, mainly (from most important):
  • Gap (between the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Angle of force application – highest force is reached only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – low-carbon steel gives the best results. Alloy admixtures decrease magnetic permeability and lifting capacity.
  • Base smoothness – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was measured by applying 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 lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate lowers the load capacity.

Safe handling of neodymium magnets
Choking Hazard

Product intended for adults. Tiny parts can be swallowed, causing serious injuries. Keep away from kids and pets.

Threat to electronics

Equipment safety: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, medical aids, timepieces).

Thermal limits

Control the heat. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.

Protective goggles

Watch out for shards. Magnets can fracture upon violent connection, launching shards into the air. Eye protection is mandatory.

Danger to pacemakers

People with a heart stimulator should maintain an safe separation from magnets. The magnetic field can disrupt the operation of the life-saving device.

Handling guide

Use magnets with awareness. Their powerful strength can shock even professionals. Be vigilant and do not underestimate their force.

Warning for allergy sufferers

It is widely known that nickel (the usual finish) is a common allergen. For allergy sufferers, prevent direct skin contact and select encased magnets.

Fire warning

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

GPS and phone interference

GPS units and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can ruin the sensors in your phone.

Bodily injuries

Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!

Warning! Details about risks in the article: Safety of working with magnets.