Product available Ships tomorrow

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

bulk discounts:

Need more?

price from 1 pcs
56.91 ZŁ
70.00 ZŁ
price from 20 pcs
53.50 ZŁ
65.80 ZŁ
price from 50 pcs
50.08 ZŁ
61.60 ZŁ
Hunting for a discount?

Contact us by phone +48 22 499 98 98 or drop us a message using our online form the contact form page.
Force and form of magnets can be estimated using our our magnetic calculator.

Orders submitted before 14:00 will be dispatched today!

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 analysis of the assembly - technical parameters

Presented data are the result of a physical calculation. Values are based on algorithms for the material Nd2Fe14B. Operational parameters may differ. Treat these calculations as a supplementary guide for designers.

Table 1: Static pull force (pull vs distance) - characteristics
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 pounds
40080.0 g / 393.2 N
dangerous!
1 mm 3668 Gs
366.8 mT
36.56 kg / 80.61 pounds
36563.4 g / 358.7 N
dangerous!
2 mm 3485 Gs
348.5 mT
33.01 kg / 72.78 pounds
33011.6 g / 323.8 N
dangerous!
3 mm 3297 Gs
329.7 mT
29.55 kg / 65.14 pounds
29545.5 g / 289.8 N
dangerous!
5 mm 2917 Gs
291.7 mT
23.13 kg / 50.99 pounds
23128.9 g / 226.9 N
dangerous!
10 mm 2049 Gs
204.9 mT
11.41 kg / 25.15 pounds
11406.3 g / 111.9 N
dangerous!
15 mm 1396 Gs
139.6 mT
5.30 kg / 11.68 pounds
5297.4 g / 52.0 N
warning
20 mm 954 Gs
95.4 mT
2.47 kg / 5.45 pounds
2473.1 g / 24.3 N
warning
30 mm 474 Gs
47.4 mT
0.61 kg / 1.35 pounds
610.3 g / 6.0 N
safe
50 mm 155 Gs
15.5 mT
0.07 kg / 0.14 pounds
65.6 g / 0.6 N
safe

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

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

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
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 pounds
12024.0 g / 118.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
8.02 kg / 17.67 pounds
8016.0 g / 78.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
4.01 kg / 8.84 pounds
4008.0 g / 39.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
20.04 kg / 44.18 pounds
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 pounds
2004.0 g / 19.7 N
1 mm
13%
5.01 kg / 11.05 pounds
5010.0 g / 49.1 N
2 mm
25%
10.02 kg / 22.09 pounds
10020.0 g / 98.3 N
3 mm
38%
15.03 kg / 33.14 pounds
15030.0 g / 147.4 N
5 mm
63%
25.05 kg / 55.23 pounds
25050.0 g / 245.7 N
10 mm
100%
40.08 kg / 88.36 pounds
40080.0 g / 393.2 N
11 mm
100%
40.08 kg / 88.36 pounds
40080.0 g / 393.2 N
12 mm
100%
40.08 kg / 88.36 pounds
40080.0 g / 393.2 N

Table 5: Thermal resistance (stability) - thermal limit
MW 38x15 / N38

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

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

Table 7: Safety (HSE) (implants) - 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
Phone / Smartphone 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 (cracking risk) - 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: Corrosion resistance
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: Submerged application
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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Shear force

*Caution: On a vertical wall, the magnet retains just a fraction of its max power.

2. Plate thickness effect

*Thin steel (e.g. computer case) severely weakens the holding force.

3. Temperature resistance

*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) = 0.50

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 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%
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: 010061-2026
Quick Unit Converter
Force (pull)

Magnetic Field

Other deals

This product is an extremely powerful cylindrical magnet, made from modern NdFeB material, which, with dimensions of Ø38x15 mm, guarantees optimal power. This specific item is characterized by high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 40.08 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 393.18 N with a weight of only 127.59 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in automation, anaerobic resins are used, which do not react with the nickel coating 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 (Ø38x15), 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 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 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 38 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.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:
  • They have stable power, and over nearly 10 years their attraction force decreases symbolically – ~1% (according to theory),
  • They are noted for resistance to demagnetization induced by external magnetic fields,
  • A magnet with a metallic silver surface looks better,
  • They show high magnetic induction at the operating surface, which improves attraction properties,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures approaching 230°C and above...
  • Thanks to versatility in designing and the ability to modify to client solutions,
  • Fundamental importance in electronics industry – they serve a role in HDD drives, electric motors, advanced medical instruments, as well as industrial machines.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Limitations

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • Limited possibility of making nuts in the magnet and complex shapes - preferred is casing - magnet mounting.
  • Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to be problematic in diagnostics medical in case of swallowing.
  • Due to expensive raw materials, their price exceeds standard values,

Holding force characteristics

Best holding force of the magnet in ideal parameterswhat contributes to it?

Magnet power was defined for the most favorable conditions, including:
  • on a block made of structural steel, optimally conducting the magnetic field
  • whose transverse dimension is min. 10 mm
  • characterized by even structure
  • without any insulating layer between the magnet and steel
  • during detachment in a direction vertical to the mounting surface
  • at temperature room level

Practical aspects of lifting capacity – factors

Effective lifting capacity is affected by working environment parameters, such as (from priority):
  • Distance (betwixt the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, rust or dirt).
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – low-carbon steel attracts best. Alloy admixtures decrease magnetic permeability and holding force.
  • Surface quality – the more even the surface, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, however under shearing force the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet and the plate reduces the holding force.

H&S for magnets
Threat to electronics

Device Safety: Strong magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).

Machining danger

Powder created during grinding of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Magnets are brittle

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

Safe operation

Handle magnets with awareness. Their immense force can surprise even professionals. Be vigilant and respect their force.

Do not overheat magnets

Control the heat. Heating the magnet above 80 degrees Celsius will destroy its magnetic structure and strength.

Crushing risk

Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.

No play value

Strictly store magnets away from children. Ingestion danger is high, and the effects of magnets connecting inside the body are fatal.

Warning for heart patients

Life threat: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

GPS and phone interference

GPS units and smartphones are highly sensitive to magnetic fields. Close proximity with a strong magnet can permanently damage the sensors in your phone.

Metal Allergy

Certain individuals experience a sensitization to nickel, which is the common plating for NdFeB magnets. Extended handling can result in a rash. We strongly advise wear safety gloves.

Safety First! Learn more about hazards in the article: Magnet Safety Guide.