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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 properties »

1.107 ZŁ with VAT / pcs + price for transport

0.900 ZŁ net + 23% VAT / pcs

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Lifting power as well as form of neodymium magnets can be analyzed with our our magnetic calculator.

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Product card - 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 simulation of the assembly - data

Presented values are the result of a physical simulation. Results rely on models for the material Nd2Fe14B. Actual parameters might slightly differ. Use these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull 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 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 decreases sharply with every mm of gap. Remember that even the smallest gap (e.g., dirt, varnish, dust) significantly weakens the grip. Magnets hold optimally at the point of direct contact; gap kills the force. See how quickly the pull force plummet, when the magnet does not touch directly to the metal substrate. When planning the assembly, discard unnecessary gaps.

Table 2: Shear load (wall)
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 following data presents the approximate weight limit required to start the downward movement of the magnet down on a upright steel plate (assuming typical friction). The holding force is a function of the separation distance between the magnet and the surface.

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 placing a element on a upright plane (e.g., a fridge), it will maintain only about 20%-30% of nominal attraction strength. Gravitational force and a low friction coefficient mean that products slide down faster than they pop off the substrate. Planning a wall mount? Remember that the sliding force is much weaker than the maximum static pull force. On a slippery surface, the holder will slip down under a much lighter weight. Utilizing a rubberized layer can significantly improve the result.

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 is incapable of take in the full magnetic flux, which wastes potential of the holder. Should you attach a powerful product to a thin surface, the flux will pass right through and the pull force will drop sharply. To achieve full efficiency of this neodymium's potential, you require a sufficiently solid backing of steel. The material oversaturation means that on thin elements (e.g., appliance housings), the product shows lower pull force. We recommend selecting the steel dimension according to the table below.

Table 5: Thermal stability (material behavior) - thermal limit
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 – heat can permanently demagnetize this product. With increasing heat, the magnet's capacity momentarily lowers. Avoid using this product close to heaters exceeding its operating temperature limit. Too high temperature will lead to destruction of magnetism.
*Engineering note: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Flat magnets (pancake types) may lose charge permanently sooner than long magnets. The danger warning in the table points to permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
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 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 magnets attract each other from a much further distance than a magnet and steel setup. Such a system of magnet-to-magnet creates a more powerful interaction and a wider radius of action. Want to build a solid fastener? Apply two magnets instead of one magnet and a steel. Remember that when connecting a pair of magnets, the collision energy is massive. The levitation is marginally weaker than the attraction, but still impressive.
*Flux density in repulsion mode drops to ~0 Gs at the geometric center between the magnets (due to field cancellation).
Important: Results refer to sliding force of a pair of identical neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (implants) - 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
Powerful magnet radiation poses a large risk to IT equipment as well as pacemakers. These NdFeB products produce a field that prevents correct functioning of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and glass. Special caution must be exercised by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, car keys, membranes, and screens. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - 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
Magnetic elements are very brittle – a collision with steel risks their cracking. Pay attention to connection velocity – a magnet released freely speeds with massive force. Kinetic force can destroy the magnet or injury to fingers. Hold the magnet firmly during installation so it doesn't hit with great force against the metal. A collision at high speed ends with a crack of the neodymium. Wear eye protection when playing with large magnets.

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)
The following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

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. Essential parameter in coil applications and motors. The Pc coefficient determines the working geometry.

Table 11: Hydrostatics and buoyancy
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.
1. Sliding resistance

*Warning: On a vertical surface, the magnet holds only ~20% of its max power.

2. Plate thickness effect

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

3. Thermal stability

*For standard magnets, 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
Material specification
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 offered product is an extremely powerful cylinder magnet, composed of advanced NdFeB material, which, at dimensions of Ø5x15 mm, guarantees optimal power. The MW 5x15 / N38 model boasts high dimensional repeatability and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 0.48 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing 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 pull force of 4.68 N with a weight of only 2.21 g, this rod is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 5.1 mm) using epoxy glues. To ensure long-term durability in industry, 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 even stronger 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 warehouse.
This model is characterized by dimensions Ø5x15 mm, which, at a weight of 2.21 g, makes it an element with high magnetic energy density. The value of 4.68 N means that the magnet is capable of holding a weight many times exceeding its own mass of 2.21 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 15 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 through the diameter if your project requires it.

Strengths as well as weaknesses of rare earth magnets.

Pros

Apart from their notable holding force, neodymium magnets have these key benefits:
  • They do not lose strength, even over around 10 years – the drop in strength is only ~1% (theoretically),
  • Neodymium magnets are exceptionally resistant to loss of magnetic properties caused by external magnetic fields,
  • A magnet with a metallic silver surface looks better,
  • Neodymium magnets achieve maximum magnetic induction on a small surface, which allows for strong attraction,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • In view of the potential of accurate molding and customization to unique projects, NdFeB magnets can be manufactured in a variety of forms and dimensions, which makes them more universal,
  • Versatile presence in modern industrial fields – they are used in HDD drives, electromotive mechanisms, diagnostic systems, as well as technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which enables their usage in compact constructions

Cons

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a steel housing, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as 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 usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in creating threads and complex forms in magnets, we propose using a housing - magnetic holder.
  • Potential hazard related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these magnets can be problematic in diagnostics medical after entering the body.
  • With mass production the cost of neodymium magnets is a challenge,

Pull force analysis

Maximum lifting capacity of the magnet – what it depends on?

Breakaway force was determined for ideal contact conditions, assuming:
  • using a base made of low-carbon steel, serving as a magnetic yoke
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • characterized by even structure
  • under conditions of no distance (metal-to-metal)
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature room level

Lifting capacity in practice – influencing factors

Bear in mind that the working load may be lower subject to the following factors, starting with the most relevant:
  • Gap (between the magnet and the plate), since even a tiny distance (e.g. 0.5 mm) leads to a drastic drop 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 usually many times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick steel does not accept the full field, causing part of the power to be lost to the other side.
  • Plate material – low-carbon steel attracts best. Alloy steels reduce magnetic properties and holding force.
  • Surface structure – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
  • Thermal environment – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.

Lifting capacity was determined with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Safe handling of neodymium magnets
Finger safety

Protect your hands. Two powerful magnets will snap together instantly with a force of massive weight, destroying anything in their path. Be careful!

Handling rules

Use magnets consciously. Their powerful strength can shock even experienced users. Stay alert and respect their force.

Protect data

Data protection: Strong magnets can damage data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).

Implant safety

Warning for patients: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or ask another person to handle the magnets.

Risk of cracking

Watch out for shards. Magnets can explode upon violent connection, ejecting shards into the air. We recommend safety glasses.

Heat warning

Regular neodymium magnets (grade N) lose power when the temperature surpasses 80°C. This process is irreversible.

Do not give to children

These products are not intended for children. Swallowing several magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and requires urgent medical intervention.

Flammability

Drilling and cutting of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Precision electronics

Be aware: rare earth magnets produce a field that interferes with precision electronics. Maintain a safe distance from your mobile, tablet, and GPS.

Metal Allergy

Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands and select versions in plastic housing.

Danger! Learn more about risks in the article: Magnet Safety Guide.