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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

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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 simulation of the assembly - data

Presented values are the direct effect of a mathematical analysis. Results are based on models for the class Nd2Fe14B. Real-world parameters may differ. Use these calculations as a supplementary guide during assembly planning.

Table 1: Static force (pull vs gap) - characteristics
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
Magnetic force drops significantly with every mm of spacing. Note that even a very thin break (e.g., contamination, paint, dust) strongly diminishes the holding power. Magnetic products work optimally at the point of direct contact; gap nullifies the force. Analyze how rapidly the pull force plummet, when the magnet does not adhere flatly to the steel surface. When designing the assembly, discard unnecessary gaps.

Table 2: Sliding hold (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 calculates the estimated weight limit necessary to cause the downward movement of the magnet down against a vertical steel wall (assuming typical friction). This value is relative to the air gap between the magnet and the surface.

Table 3: Wall mounting (sliding) - 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 hanging a holder on a upright surface (e.g., a fridge), it will only hold just about 1/5 of nominal attraction strength. Gravitational force as well as a weak degree of grip cause that products move down faster than they pop off the substrate. Planning a vertical fastening? Remember that the sliding force is significantly lower than the perpendicular breakaway force. On a painted metal, the magnet will give way down under a much lighter cargo. Application of an anti-slip layer can effectively improve the result.

Table 4: Steel thickness (saturation) - 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 metal plate is unable to conduct the full magnetic flux, which weakens actual performance of the magnet. Should you mount a strong magnet to a weak sheet, the flux will pass right through and the holding will be smaller. To utilize the maximum of this magnet's potential, you require a sufficiently solid backing of metal. The material oversaturation means that on thin elements (e.g., thin profiles), the product works worse. We recommend selecting the steel cross-section according to the table below.

Table 5: Thermal resistance (material behavior) - resistance threshold
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
Ordinary NdFeB products change their properties parameters above the temperature limit. Watch out for overheating – excessive heat can permanently demagnetize this magnet. With every degree above norm, the magnet's power temporarily lowers. Do not use this magnet in hot environments exceeding its operating temperature limit. Ignoring the limit will lead to permanent loss of magnetic properties.
*Engineering note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low Pc) may lose charge permanently under lower heat stress compared to rod magnets. The danger warning in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
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 magnets interact from a much further distance than a neodymium and metal setup. Such a system of magnet-to-magnet produces a massive flux and a larger range of action. Want to build a strong closure? Use a pair of magnets instead of one magnet and a steel. Exercise caution that when connecting a pair of magnets, the collision energy is huge. The levitation is a bit weaker than the connection force, but still significant.
*Field value between like poles is approximately ~0 Gs at the geometric center between the magnets (due to field cancellation).
Note: Estimates apply to sliding force of dual identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (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
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
Powerful magnet radiation poses a serious hazard to electronics as well as medical implants. These magnets produce a flux that disrupts operation of digital equipment. Notice: the unseen radiation passes through tissues and plastic. Special caution must be taken by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (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
Neodymium magnets are very brittle – a strong collision with metal risks their cracking. Control the attraction moment – a magnet released freely speeds with massive force. Kinetic force can trigger coating fragments or painful pinches to fingers. Always hold the magnet during bringing near metal so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear eye protection when working with powerful specimens.

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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Improper coating selection is the most common cause of magnet failure over time.

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)
Flux value emitted by the magnet pole. Key data in coil applications as well as sensors. Pc value 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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
The magnetic field penetrates through water without any losses. Buoyancy helps in lifting finds.
1. Wall mount (shear)

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

2. Efficiency vs thickness

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

3. Temperature resistance

*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

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.

Engineering data and GPSR
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
Measurement Calculator
Force (pull)
Magnetic Field
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The presented product is an exceptionally strong rod 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. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient magnetic separators, 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 electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating 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.
Magnets N38 are strong enough for the majority of applications in automation and machine building, where extreme miniaturization with maximum force is not required. 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 impressive 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 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 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 as well as cons of neodymium magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They have stable power, and over more than ten years their performance decreases symbolically – ~1% (in testing),
  • Neodymium magnets are characterized by highly resistant to demagnetization caused by external interference,
  • In other words, due to the shiny finish of nickel, the element gains visual value,
  • The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Considering the possibility of accurate shaping and customization to custom solutions, neodymium magnets can be manufactured in a broad palette of shapes and sizes, which expands the range of possible applications,
  • Fundamental importance in high-tech industry – they serve a role in magnetic memories, electric motors, medical equipment, and other advanced devices.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength 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
  • 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 prevent oxidation and corrosion.
  • Limited ability of creating nuts in the magnet and complicated shapes - recommended is cover - mounting mechanism.
  • Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small elements of these products are able to disrupt the diagnostic process medical when they are in the body.
  • With large orders the cost of neodymium magnets is a challenge,

Lifting parameters

Maximum holding power of the magnet – what contributes to it?

Holding force of 0.48 kg is a measurement result conducted under specific, ideal conditions:
  • using a base made of mild steel, functioning as a ideal flux conductor
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • characterized by lack of roughness
  • under conditions of ideal adhesion (metal-to-metal)
  • under perpendicular force direction (90-degree angle)
  • at temperature room level

What influences lifting capacity in practice

Effective lifting capacity is influenced by working environment parameters, mainly (from most important):
  • Distance – the presence of any layer (rust, dirt, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Steel thickness – too thin plate does not close the flux, causing part of the flux to be lost to the other side.
  • Material type – the best choice is high-permeability steel. Cast iron may have worse magnetic properties.
  • Plate texture – smooth surfaces ensure maximum contact, which improves force. Uneven metal weaken the grip.
  • Thermal environment – temperature increase causes a temporary drop of force. Check the maximum operating temperature for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Precautions when working with NdFeB magnets
Keep away from electronics

A strong magnetic field interferes with the functioning of magnetometers in phones and navigation systems. Keep magnets near a smartphone to avoid breaking the sensors.

Handling rules

Use magnets with awareness. Their huge power can surprise even professionals. Stay alert and do not underestimate their force.

Threat to electronics

Intense magnetic fields can destroy records on payment cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Bodily injuries

Protect your hands. Two large magnets will join instantly with a force of massive weight, crushing anything in their path. Be careful!

Do not give to children

Strictly keep magnets out of reach of children. Choking hazard is significant, and the consequences of magnets clamping inside the body are very dangerous.

Health Danger

For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or request help to work with the magnets.

Warning for allergy sufferers

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If skin irritation happens, immediately stop handling magnets and wear gloves.

Thermal limits

Keep cool. NdFeB magnets are susceptible to heat. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Mechanical processing

Fire warning: Rare earth powder is highly flammable. Do not process magnets without safety gear as this risks ignition.

Magnet fragility

Neodymium magnets are ceramic materials, which means they are very brittle. Clashing of two magnets will cause them cracking into small pieces.

Safety First! Need more info? Read our article: Why are neodymium magnets dangerous?