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MW 38x15 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010061

GTIN/EAN: 5906301810605

Diameter Ø

38 mm [±0,1 mm]

Height

15 mm [±0,1 mm]

Weight

127.59 g

Magnetization Direction

↑ axial

Load capacity

40.08 kg / 393.18 N

Magnetic Induction

384.07 mT / 3841 Gs

Coating

[NiCuNi] Nickel

70.00 with VAT / pcs + price for transport

56.91 ZŁ net + 23% VAT / pcs

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Technical details - MW 38x15 / N38 - cylindrical magnet

Specification / characteristics - MW 38x15 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010061
GTIN/EAN 5906301810605
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 38 mm [±0,1 mm]
Height 15 mm [±0,1 mm]
Weight 127.59 g
Magnetization Direction ↑ axial
Load capacity ~ ? 40.08 kg / 393.18 N
Magnetic Induction ~ ? 384.07 mT / 3841 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 38x15 / 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 assembly - technical parameters

These information constitute the direct effect of a mathematical simulation. Results rely on algorithms for the material Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Use these calculations as a supplementary guide for designers.

Table 1: Static force (pull vs gap) - interaction chart
MW 38x15 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3840 Gs
384.0 mT
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
dangerous!
1 mm 3668 Gs
366.8 mT
36.56 kg / 80.61 LBS
36563.4 g / 358.7 N
dangerous!
2 mm 3485 Gs
348.5 mT
33.01 kg / 72.78 LBS
33011.6 g / 323.8 N
dangerous!
3 mm 3297 Gs
329.7 mT
29.55 kg / 65.14 LBS
29545.5 g / 289.8 N
dangerous!
5 mm 2917 Gs
291.7 mT
23.13 kg / 50.99 LBS
23128.9 g / 226.9 N
dangerous!
10 mm 2049 Gs
204.9 mT
11.41 kg / 25.15 LBS
11406.3 g / 111.9 N
dangerous!
15 mm 1396 Gs
139.6 mT
5.30 kg / 11.68 LBS
5297.4 g / 52.0 N
warning
20 mm 954 Gs
95.4 mT
2.47 kg / 5.45 LBS
2473.1 g / 24.3 N
warning
30 mm 474 Gs
47.4 mT
0.61 kg / 1.35 LBS
610.3 g / 6.0 N
safe
50 mm 155 Gs
15.5 mT
0.07 kg / 0.14 LBS
65.6 g / 0.6 N
safe

Table 2: Shear load (wall)
MW 38x15 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 8.02 kg / 17.67 LBS
8016.0 g / 78.6 N
1 mm Stal (~0.2) 7.31 kg / 16.12 LBS
7312.0 g / 71.7 N
2 mm Stal (~0.2) 6.60 kg / 14.55 LBS
6602.0 g / 64.8 N
3 mm Stal (~0.2) 5.91 kg / 13.03 LBS
5910.0 g / 58.0 N
5 mm Stal (~0.2) 4.63 kg / 10.20 LBS
4626.0 g / 45.4 N
10 mm Stal (~0.2) 2.28 kg / 5.03 LBS
2282.0 g / 22.4 N
15 mm Stal (~0.2) 1.06 kg / 2.34 LBS
1060.0 g / 10.4 N
20 mm Stal (~0.2) 0.49 kg / 1.09 LBS
494.0 g / 4.8 N
30 mm Stal (~0.2) 0.12 kg / 0.27 LBS
122.0 g / 1.2 N
50 mm Stal (~0.2) 0.01 kg / 0.03 LBS
14.0 g / 0.1 N

Table 3: Vertical assembly (sliding) - vertical pull
MW 38x15 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
12.02 kg / 26.51 LBS
12024.0 g / 118.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
8.02 kg / 17.67 LBS
8016.0 g / 78.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
4.01 kg / 8.84 LBS
4008.0 g / 39.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
20.04 kg / 44.18 LBS
20040.0 g / 196.6 N

Table 4: Material efficiency (saturation) - power losses
MW 38x15 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
2.00 kg / 4.42 LBS
2004.0 g / 19.7 N
1 mm
13%
5.01 kg / 11.05 LBS
5010.0 g / 49.1 N
2 mm
25%
10.02 kg / 22.09 LBS
10020.0 g / 98.3 N
3 mm
38%
15.03 kg / 33.14 LBS
15030.0 g / 147.4 N
5 mm
63%
25.05 kg / 55.23 LBS
25050.0 g / 245.7 N
10 mm
100%
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
11 mm
100%
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
12 mm
100%
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N

Table 5: Thermal stability (stability) - power drop
MW 38x15 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
OK
40 °C -2.2% 39.20 kg / 86.42 LBS
39198.2 g / 384.5 N
OK
60 °C -4.4% 38.32 kg / 84.47 LBS
38316.5 g / 375.9 N
80 °C -6.6% 37.43 kg / 82.53 LBS
37434.7 g / 367.2 N
100 °C -28.8% 28.54 kg / 62.91 LBS
28537.0 g / 279.9 N

Table 6: Two magnets (repulsion) - field range
MW 38x15 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 103.10 kg / 227.31 LBS
5 235 Gs
15.47 kg / 34.10 LBS
15466 g / 151.7 N
N/A
1 mm 98.64 kg / 217.47 LBS
7 512 Gs
14.80 kg / 32.62 LBS
14796 g / 145.2 N
88.78 kg / 195.72 LBS
~0 Gs
2 mm 94.06 kg / 207.36 LBS
7 336 Gs
14.11 kg / 31.10 LBS
14109 g / 138.4 N
84.65 kg / 186.63 LBS
~0 Gs
3 mm 89.48 kg / 197.26 LBS
7 155 Gs
13.42 kg / 29.59 LBS
13421 g / 131.7 N
80.53 kg / 177.53 LBS
~0 Gs
5 mm 80.42 kg / 177.30 LBS
6 783 Gs
12.06 kg / 26.60 LBS
12064 g / 118.3 N
72.38 kg / 159.57 LBS
~0 Gs
10 mm 59.50 kg / 131.17 LBS
5 834 Gs
8.92 kg / 19.68 LBS
8925 g / 87.6 N
53.55 kg / 118.05 LBS
~0 Gs
20 mm 29.34 kg / 64.69 LBS
4 097 Gs
4.40 kg / 9.70 LBS
4401 g / 43.2 N
26.41 kg / 58.22 LBS
~0 Gs
50 mm 3.08 kg / 6.80 LBS
1 328 Gs
0.46 kg / 1.02 LBS
463 g / 4.5 N
2.78 kg / 6.12 LBS
~0 Gs
60 mm 1.57 kg / 3.46 LBS
948 Gs
0.24 kg / 0.52 LBS
236 g / 2.3 N
1.41 kg / 3.12 LBS
~0 Gs
70 mm 0.84 kg / 1.85 LBS
694 Gs
0.13 kg / 0.28 LBS
126 g / 1.2 N
0.76 kg / 1.67 LBS
~0 Gs
80 mm 0.47 kg / 1.04 LBS
520 Gs
0.07 kg / 0.16 LBS
71 g / 0.7 N
0.42 kg / 0.94 LBS
~0 Gs
90 mm 0.28 kg / 0.61 LBS
398 Gs
0.04 kg / 0.09 LBS
42 g / 0.4 N
0.25 kg / 0.55 LBS
~0 Gs
100 mm 0.17 kg / 0.37 LBS
311 Gs
0.03 kg / 0.06 LBS
25 g / 0.2 N
0.15 kg / 0.33 LBS
~0 Gs

Table 7: Hazards (electronics) - precautionary measures
MW 38x15 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 18.5 cm
Hearing aid 10 Gs (1.0 mT) 14.5 cm
Timepiece 20 Gs (2.0 mT) 11.5 cm
Mobile device 40 Gs (4.0 mT) 9.0 cm
Remote 50 Gs (5.0 mT) 8.0 cm
Payment card 400 Gs (40.0 mT) 3.5 cm
HDD hard drive 600 Gs (60.0 mT) 3.0 cm

Table 8: Collisions (kinetic energy) - collision effects
MW 38x15 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 20.81 km/h
(5.78 m/s)
2.13 J
30 mm 31.25 km/h
(8.68 m/s)
4.81 J
50 mm 40.01 km/h
(11.11 m/s)
7.88 J
100 mm 56.53 km/h
(15.70 m/s)
15.73 J

Table 9: Anti-corrosion coating durability
MW 38x15 / 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)

Table 10: Electrical data (Pc)
MW 38x15 / N38

Parameter Value SI Unit / Description
Magnetic Flux 45 065 Mx 450.7 µWb
Pc Coefficient 0.50 Low (Flat)

Table 11: Underwater work (magnet fishing)
MW 38x15 / N38

Environment Effective steel pull Effect
Air (land) 40.08 kg Standard
Water (riverbed) 45.89 kg
(+5.81 kg buoyancy gain)
+14.5%
Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Wall mount (shear)

*Caution: On a vertical surface, the magnet holds merely approx. 20-30% of its max power.

2. Efficiency vs thickness

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

3. Temperature resistance

*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) = 0.50

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 specification and ecology
Elemental analysis
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%
Sustainability
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: 010061-2026
Magnet Unit Converter
Pulling force

Magnetic Induction

Other products

This product is an exceptionally strong rod magnet, produced from advanced NdFeB material, which, at dimensions of Ø38x15 mm, guarantees maximum efficiency. This specific item is characterized by a tolerance of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 40.08 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing 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 pull force of 393.18 N with a weight of only 127.59 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 long-term durability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability 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 (Ø38x15), 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 Ø38x15 mm, which, at a weight of 127.59 g, makes it an element with high magnetic energy density. The value of 393.18 N means that the magnet is capable of holding a weight many times exceeding its own mass of 127.59 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 15 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 through the diameter if your project requires it.

Pros and cons of Nd2Fe14B magnets.

Advantages

Apart from their consistent power, neodymium magnets have these key benefits:
  • They virtually do not lose power, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
  • They possess excellent resistance to weakening of magnetic properties due to external magnetic sources,
  • By applying a reflective layer of nickel, the element presents an professional look,
  • They feature high magnetic induction at the operating surface, which affects their effectiveness,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to freedom in shaping and the capacity to customize to complex applications,
  • Versatile presence in high-tech industry – they serve a role in magnetic memories, electric drive systems, precision medical tools, as well as complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in miniature devices

Cons

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing nuts and complicated shapes in magnets, we propose using cover - magnetic mechanism.
  • Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • Due to complex production process, their price is higher than average,

Lifting parameters

Maximum lifting capacity of the magnetwhat it depends on?

Magnet power was determined for optimal configuration, assuming:
  • with the application of a sheet made of special test steel, guaranteeing full magnetic saturation
  • whose thickness is min. 10 mm
  • with an ideally smooth contact surface
  • under conditions of gap-free contact (metal-to-metal)
  • under perpendicular application of breakaway force (90-degree angle)
  • in neutral thermal conditions

Magnet lifting force in use – key factors

Holding efficiency impacted by working environment parameters, including (from most important):
  • Distance – the presence of any layer (paint, dirt, air) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Steel type – low-carbon steel attracts best. Higher carbon content lower magnetic properties and holding force.
  • Plate texture – smooth surfaces ensure maximum contact, which improves force. Uneven metal reduce efficiency.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was assessed with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet and the plate decreases the holding force.

Precautions when working with NdFeB magnets
Skin irritation risks

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If redness appears, cease working with magnets and wear gloves.

Do not give to children

Only for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Store out of reach of children and animals.

Shattering risk

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets leads to them cracking into small pieces.

Crushing risk

Protect your hands. Two large magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Dust is flammable

Fire warning: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.

Data carriers

Powerful magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

ICD Warning

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.

Immense force

Use magnets with awareness. Their powerful strength can surprise even experienced users. Be vigilant and do not underestimate their power.

GPS Danger

A strong magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Do not bring magnets close to a smartphone to prevent damaging the sensors.

Demagnetization risk

Keep cool. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).

Safety First! Details about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98