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MW 15x5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010031

GTIN/EAN: 5906301810308

5.00

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

technical details »

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Technical details - 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 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 simulation of the magnet - report

These values represent the outcome of a engineering calculation. Results rely on models for the material Nd2Fe14B. Operational performance might slightly differ from theoretical values. Please consider these calculations as a reference point when designing systems.

Table 1: Static force (pull vs distance) - characteristics
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 lbs
5390.0 g / 52.9 N
 warning
1 mm 3054 Gs
305.4 mT
 4.26 kg / 9.39 lbs
4258.2 g / 41.8 N
 warning
2 mm 2633 Gs
263.3 mT
 3.17 kg / 6.98 lbs
3165.4 g / 31.1 N
 warning
3 mm 2221 Gs
222.1 mT
 2.25 kg / 4.96 lbs
2251.5 g / 22.1 N
 warning
5 mm 1521 Gs
152.1 mT
 1.06 kg / 2.33 lbs
1056.2 g / 10.4 N
 low risk
10 mm 585 Gs
58.5 mT
 0.16 kg / 0.35 lbs
156.5 g / 1.5 N
 low risk
15 mm 260 Gs
26.0 mT
 0.03 kg / 0.07 lbs
30.8 g / 0.3 N
 low risk
20 mm 133 Gs
13.3 mT
 0.01 kg / 0.02 lbs
8.1 g / 0.1 N
 low risk
30 mm 47 Gs
4.7 mT
 0.00 kg / 0.00 lbs
1.0 g / 0.0 N
 low risk
50 mm 12 Gs
1.2 mT
 0.00 kg / 0.00 lbs
0.1 g / 0.0 N
 low risk
Grip strength drops significantly with every mm of spacing. Remember that even a very thin break (e.g., dirt, paint, rust) strongly reduces the pull force. Neodymiums work optimally at the point of direct contact; air break nullifies the power. See how rapidly the load capacity plummet, when the magnet does not adhere flatly to the steel surface. When planning the assembly, avoid redundant distances.

Table 2: Shear load (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 lbs
1078.0 g / 10.6 N
1 mm Stal (~0.2) 0.85 kg / 1.88 lbs
852.0 g / 8.4 N
2 mm Stal (~0.2) 0.63 kg / 1.40 lbs
634.0 g / 6.2 N
3 mm Stal (~0.2) 0.45 kg / 0.99 lbs
450.0 g / 4.4 N
5 mm Stal (~0.2) 0.21 kg / 0.47 lbs
212.0 g / 2.1 N
10 mm Stal (~0.2) 0.03 kg / 0.07 lbs
32.0 g / 0.3 N
15 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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
This section calculates the estimated weight limit sufficient to cause the sliding of the magnet vertically on a vertical metal surface (considering typical friction coefficient). This value is relative to the separation distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - 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 lbs
1617.0 g / 15.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.08 kg / 2.38 lbs
1078.0 g / 10.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.54 kg / 1.19 lbs
539.0 g / 5.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.70 kg / 5.94 lbs
2695.0 g / 26.4 N
When placing a magnet on a vertical surface (e.g., a board), it you can count on just approx. 1/5 of its nominal power. Gravity as well as a low friction coefficient cause that magnets move down easier than they detach. Designing a vertical fastening? Note that the sliding force is much weaker than the perpendicular breakaway force. On a slippery surface, the element will slide down under a significantly smaller weight. Utilizing a rubberized layer can significantly improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MW 15x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.54 kg / 1.19 lbs
539.0 g / 5.3 N
1 mm
25%
 1.35 kg / 2.97 lbs
1347.5 g / 13.2 N
2 mm
50%
 2.70 kg / 5.94 lbs
2695.0 g / 26.4 N
3 mm
75%
 4.04 kg / 8.91 lbs
4042.5 g / 39.7 N
5 mm
100%
 5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
10 mm
100%
 5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
11 mm
100%
 5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
12 mm
100%
 5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
A thin sheet is unable to focus the entire magnetic field, which wastes potential of the holder. Should you install a neodymium to a thin surface, the magnetism will penetrate right through and the holding will be smaller. To achieve 100% of this neodymium's potential, you need a suitably thick element of steel. The saturation phenomenon causes that on thin elements (e.g., car bodies), the holder shows lower pull force. We advise picking the steel dimension from these parameters.

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 15x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
 OK
40 °C -2.2% 5.27 kg / 11.62 lbs
5271.4 g / 51.7 N
 OK
60 °C -4.4% 5.15 kg / 11.36 lbs
5152.8 g / 50.5 N
80 °C -6.6% 5.03 kg / 11.10 lbs
5034.3 g / 49.4 N
100 °C -28.8% 3.84 kg / 8.46 lbs
3837.7 g / 37.6 N
Standard neodymium magnets lose power past the thermal threshold. Avoid high temperatures – excessive heat can permanently damage this product. With increasing heat, the neodymium's force briefly decreases. Do not use this magnet close to ovens higher than its working range. Too high temperature will cause irreversible degradation of magnetic properties.
*Important note: Temperature resistance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low permeance coefficient) are more susceptible to demagnetization sooner than long magnets. Warning indicator in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - 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 lbs
4 954 Gs
1.93 kg / 4.25 lbs
1929 g / 18.9 N
 N/A
1 mm 11.54 kg / 25.43 lbs
6 508 Gs
1.73 kg / 3.81 lbs
1730 g / 17.0 N
 10.38 kg / 22.89 lbs
~0 Gs
2 mm 10.16 kg / 22.40 lbs
6 107 Gs
1.52 kg / 3.36 lbs
1524 g / 14.9 N
 9.14 kg / 20.16 lbs
~0 Gs
3 mm 8.82 kg / 19.44 lbs
5 689 Gs
1.32 kg / 2.92 lbs
1322 g / 13.0 N
 7.93 kg / 17.49 lbs
~0 Gs
5 mm 6.40 kg / 14.11 lbs
4 847 Gs
0.96 kg / 2.12 lbs
960 g / 9.4 N
 5.76 kg / 12.70 lbs
~0 Gs
10 mm 2.52 kg / 5.56 lbs
3 042 Gs
0.38 kg / 0.83 lbs
378 g / 3.7 N
 2.27 kg / 5.00 lbs
~0 Gs
20 mm 0.37 kg / 0.82 lbs
1 171 Gs
0.06 kg / 0.12 lbs
56 g / 0.5 N
 0.34 kg / 0.74 lbs
~0 Gs
50 mm 0.01 kg / 0.01 lbs
153 Gs
0.00 kg / 0.00 lbs
1 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.01 lbs
95 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
63 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
44 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
32 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
23 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. The setup of magnet-to-magnet generates a stronger field and a larger range of action. Planning to create a powerful holder? Utilize two neodymiums instead of a neodymium and a striker plate. Exercise caution that when attracting two neodymiums, the impact force is extreme. The repulsion force is marginally weaker than the connection force, but still significant.
*Flux density between like poles drops to ~0 Gs in the exact middle of the gap (due to field cancellation).
Note: Figures refer to shear force of dual same neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - precautionary measures
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
Phone / Smartphone 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
A strong magnetic field is a large risk to electronics as well as pacemakers. These magnets produce a flux that destroys function of sensitive medical devices. Remember: the unseen radiation penetrates the body and plastic. Special caution must be exercised by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, car keys, speakers, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - warning
MW 15x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 29.27 km/h
(8.13 m/s)
 0.22 J
30 mm 49.81 km/h
(13.84 m/s)
 0.63 J
50 mm 64.30 km/h
(17.86 m/s)
 1.06 J
100 mm 90.93 km/h
(25.26 m/s)
 2.12 J
Neodymium magnets are very brittle – a strong collision with metal risks their cracking. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Kinetic force can trigger coating fragments or dangerous crushing to skin. Always hold the magnet during bringing near metal so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear eye protection when playing with large magnets.

Table 9: Anti-corrosion coating durability
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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Flux)
MW 15x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 6 428 Mx 64.3 µWb
Pc Coefficient 0.44 Low (Flat)
Flux value emitted by the magnet pole. Key data for generator designers and motors. The Pc coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
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!
Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.
1. Wall mount (shear)

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

2. Efficiency vs thickness

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

3. Power loss vs temp

*For N38 material, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.44

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
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%
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: 010031-2026
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The presented product is a very strong rod magnet, composed of durable NdFeB material, which, at dimensions of Ø15x5 mm, guarantees maximum efficiency. The MW 15x5 / N38 component is characterized by an accuracy of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 5.39 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 52.83 N with a weight of only 6.63 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 15.1 mm) using epoxy glues. To ensure stability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest 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.
This model is characterized by dimensions Ø15x5 mm, which, at a weight of 6.63 g, makes it an element with impressive magnetic energy density. The value of 52.83 N means that the magnet is capable of holding a weight many times exceeding its own mass of 6.63 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 15 mm. 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 diametrically if your project requires it.

Strengths and weaknesses of neodymium magnets.

Benefits

Besides their stability, neodymium magnets are valued for these benefits:
  • Their magnetic field remains stable, and after around 10 years it drops only by ~1% (according to research),
  • Neodymium magnets are extremely resistant to magnetic field loss caused by external magnetic fields,
  • By applying a smooth layer of nickel, the element presents an nice look,
  • Magnets possess very high magnetic induction on the active area,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in constructing and the capacity to modify to individual projects,
  • Significant place in advanced technology sectors – they find application in data components, electric drive systems, medical devices, as well as modern systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • At very strong impacts they can crack, therefore we recommend placing them in steel cases. 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, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing nuts and complicated forms in magnets, we propose using casing - magnetic holder.
  • Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small components of these devices are able to complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

Holding force of 5.39 kg is a result of laboratory testing conducted under standard conditions:
  • with the application of a yoke made of special test steel, ensuring full magnetic saturation
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with a surface cleaned and smooth
  • without any clearance between the magnet and steel
  • under vertical force direction (90-degree angle)
  • at room temperature

Lifting capacity in real conditions – factors

During everyday use, the real power depends on a number of factors, ranked from most significant:
  • Gap (between the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Load vector – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick steel does not close the flux, causing part of the flux to be lost into the air.
  • Steel type – mild steel attracts best. Higher carbon content reduce magnetic permeability and lifting capacity.
  • Surface condition – smooth surfaces ensure maximum contact, which improves force. Rough surfaces reduce efficiency.
  • Thermal environment – temperature increase results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

Safe handling of neodymium magnets
Heat warning

Avoid heat. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, look for special high-temperature series (H, SH, UH).

Safe operation

Use magnets with awareness. Their huge power can shock even experienced users. Stay alert and do not underestimate their power.

Electronic devices

Powerful magnetic fields can erase data on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

Implant safety

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

Dust is flammable

Fire warning: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.

Bone fractures

Large magnets can smash fingers in a fraction of a second. Under no circumstances put your hand betwixt two strong magnets.

Keep away from electronics

Navigation devices and smartphones are highly sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Allergic reactions

Certain individuals have a sensitization to Ni, which is the typical protective layer for NdFeB magnets. Prolonged contact may cause skin redness. We strongly advise wear safety gloves.

Swallowing risk

These products are not toys. Swallowing a few magnets may result in them attracting across intestines, which constitutes a direct threat to life and requires urgent medical intervention.

Beware of splinters

Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

Safety First! Learn more about hazards in the article: Safety of working with magnets.