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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 - 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

Technical analysis of the assembly - technical parameters

These data constitute the direct effect of a engineering simulation. Values were calculated on models for the class Nd2Fe14B. Operational conditions might slightly differ. Use these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - 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 LBS
40080.0 g / 393.2 N
crushing
1 mm 3668 Gs
366.8 mT
36.56 kg / 80.61 LBS
36563.4 g / 358.7 N
crushing
2 mm 3485 Gs
348.5 mT
33.01 kg / 72.78 LBS
33011.6 g / 323.8 N
crushing
3 mm 3297 Gs
329.7 mT
29.55 kg / 65.14 LBS
29545.5 g / 289.8 N
crushing
5 mm 2917 Gs
291.7 mT
23.13 kg / 50.99 LBS
23128.9 g / 226.9 N
crushing
10 mm 2049 Gs
204.9 mT
11.41 kg / 25.15 LBS
11406.3 g / 111.9 N
crushing
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
low risk
50 mm 155 Gs
15.5 mT
0.07 kg / 0.14 LBS
65.6 g / 0.6 N
low risk

Table 2: Sliding force (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: Wall mounting (shearing) - 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: Steel thickness (saturation) - sheet metal selection
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 resistance (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) - warnings
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
Car key 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: Impact energy (cracking risk) - warning
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 (Flux)
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%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

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

2. Steel saturation

*Thin steel (e.g. computer case) drastically reduces the holding force.

3. Power loss vs temp

*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

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.

Engineering data and GPSR
Chemical composition
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: 010061-2026
Magnet Unit Converter
Pulling force

Magnetic Field

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The presented product is an exceptionally strong cylinder magnet, composed of modern NdFeB material, which, with dimensions of Ø38x15 mm, guarantees maximum efficiency. This specific item is characterized by an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 40.08 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. 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 low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability in industry, anaerobic resins 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 industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. 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.
The presented product is a neodymium magnet with precisely defined parameters: diameter 38 mm and height 15 mm. The key parameter here is the holding force amounting to approximately 40.08 kg (force ~393.18 N), which, with such defined dimensions, proves the high power of the NdFeB material. 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 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 diametrically if your project requires it.

Pros and cons of rare earth magnets.

Strengths

Besides their immense strength, neodymium magnets offer the following advantages:
  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (according to literature),
  • They do not lose their magnetic properties even under external field action,
  • By using a shiny coating of nickel, the element presents an professional look,
  • Magnets exhibit exceptionally strong magnetic induction on the active area,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to flexibility in designing and the capacity to customize to individual projects,
  • Versatile presence in modern industrial fields – they serve a role in data components, electric motors, advanced medical instruments, and other advanced devices.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

What to avoid - cons of neodymium magnets: application proposals
  • At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's 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.
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We suggest a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical when they are in the body.
  • Due to expensive raw materials, their price exceeds standard values,

Pull force analysis

Breakaway strength of the magnet in ideal conditionswhat affects it?

The load parameter shown concerns the maximum value, obtained under optimal environment, specifically:
  • using a base made of mild steel, serving as a ideal flux conductor
  • with a cross-section of at least 10 mm
  • characterized by lack of roughness
  • without the slightest clearance between the magnet and steel
  • for force applied at a right angle (in the magnet axis)
  • at temperature room level

Practical aspects of lifting capacity – factors

During everyday use, the actual lifting capacity depends on many variables, ranked from most significant:
  • Distance – existence of any layer (rust, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Load vector – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Steel grade – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Temperature – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet and the plate decreases the holding force.

Safety rules for work with neodymium magnets
Threat to navigation

GPS units and smartphones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Skin irritation risks

A percentage of the population have a hypersensitivity to Ni, which is the common plating for neodymium magnets. Prolonged contact might lead to dermatitis. We recommend wear protective gloves.

Respect the power

Handle magnets consciously. Their immense force can surprise even experienced users. Plan your moves and do not underestimate their power.

Electronic devices

Equipment safety: Neodymium magnets can ruin payment cards and delicate electronics (heart implants, hearing aids, timepieces).

Physical harm

Risk of injury: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Protective goggles

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Maximum temperature

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.

Pacemakers

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Machining danger

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

No play value

These products are not toys. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which constitutes a direct threat to life and requires urgent medical intervention.

Security! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98