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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

product parameters »

70.00 ZŁ with VAT / pcs + price for transport

56.91 ZŁ net + 23% VAT / pcs

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Force as well as structure of magnets can be tested on our power calculator.

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Technical data of the product - 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 product - report

The following information are the result of a physical analysis. Results were calculated on algorithms for the class Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Use these data as a preliminary roadmap during assembly planning.

Table 1: Static force (force vs distance) - 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
 weak grip
50 mm 155 Gs
15.5 mT
 0.07 kg / 0.14 lbs
65.6 g / 0.6 N
 weak grip
Magnetic force weakens significantly with every mm of distance. Keep in mind that even a very thin break (e.g., contamination, varnish, dust) noticeably diminishes the holding power. Magnetic products work most effectively during direct contact; distance nullifies the force. Notice how rapidly the pull force plummet, when the product does not touch directly to the metal substrate. When designing the mounting, eliminate additional spacers.

Table 2: Vertical load (vertical surface)
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
The following data shows the theoretical weight limit needed to initiate the downward movement of the magnet vertically on a vertical steel plate (assuming typical friction coefficient). The holding force is relative to the gap size between the magnet and the surface.

Table 3: Wall mounting (sliding) - 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 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
When placing a element on a vertical wall (e.g., a board), it will only hold only approx. 1/5 of nominal attraction strength. Gravity as well as a low friction coefficient cause that magnets slide down faster than they pull off. Designing a vertical fastening? Remember that the shear force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the element will give way down under a much lighter cargo. Using a rubber pad can significantly improve the result.

Table 4: Steel thickness (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
A thin sheet is not enough to focus the entire magnetic field, which wastes potential of the holder. Should you attach a powerful product to a weak sheet, the field will pass right through and the pull force will drop sharply. To squeeze 100% of this magnet's power, you require a sufficiently solid piece of metal. The material oversaturation means that on delicate walls (e.g., car bodies), the magnet works worse. We suggest choosing the steel cross-section from these parameters.

Table 5: Thermal resistance (material behavior) - resistance threshold
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
Classic neodymiums change their properties power above the temperature limit. Avoid high temperatures – heat can irreversibly damage this product. With increasing heat, the neodymium's capacity temporarily lowers. Avoid using this magnet close to ovens exceeding its working range. Ignoring the limit will cause permanent loss of magnetic properties.
*Important note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) are more susceptible to demagnetization sooner than taller cylinders. The danger warning in the table indicates permanent field degradation for this specific geometry.

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

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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
Two magnets interact from a significantly greater distance than a magnet and steel combination. The setup of two magnets generates a stronger field and a larger range of performance. Designing a solid fastener? Use a pair of magnets instead of a neodymium and a steel. Be careful that when attracting two neodymiums, the collision energy is huge. The repulsion force is slightly lower than the attraction, but still significant.
*Flux density for N-N configuration drops to ~0 Gs at the geometric center of the gap (resulting from vector opposition).
Note: Results demonstrate shear force of a pair of same magnets (friction coefficient ~0.15 for Ni-Ni plating).

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
Extremely neodym field is a real danger to electronics as well as medical implants. These neodymiums produce a flux that disrupts operation of digital equipment. Notice: the invisible magnetic field acts through matter and plastic. Exceptional care must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, remotes, membranes, and screens. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - 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
NdFeB products are very brittle – a strong collision with metal risks their cracking. Watch the impact speed – a magnet released freely speeds with massive force. Kinetic force can cause material chips or injury to fingers. Always hold the magnet during installation so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h means shattering of the magnet. Wear safety glasses when handling with powerful specimens.

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)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Moisture resistance is crucial for installations in bathrooms or outdoors.

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)
Total magnetic flux passing through the magnet pole. Essential parameter when building generators as well as sensors. Pc value defines the magnet's operating point.

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.
The magnetic field penetrates through water without any losses. However, remember the water resistance when pulling the rope quickly.
1. Sliding resistance

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

2. Steel saturation

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

3. Thermal stability

*For N38 material, the max working temp 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 and environmental data
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
Force (pull)
Magnetic Induction
Insert a value into any field, to see all other values convert instantly.

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The offered product is an exceptionally strong cylindrical magnet, made from modern NdFeB material, which, with dimensions of Ø38x15 mm, guarantees optimal power. This specific item boasts high dimensional repeatability and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 40.08 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 393.18 N with a weight of only 127.59 g, this cylindrical magnet is indispensable in miniature devices 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 immediate cracking of this professional component. To ensure long-term durability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. 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 impressive magnetic energy density. The key parameter here is the lifting capacity 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.
This cylinder is magnetized axially (along the height of 15 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 through the diameter if your project requires it.

Pros and cons of rare earth magnets.

Benefits

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
  • Magnets perfectly protect themselves against loss of magnetization caused by foreign field sources,
  • In other words, due to the glossy surface of silver, the element becomes visually attractive,
  • Magnets are characterized by exceptionally strong magnetic induction on the working surface,
  • 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...
  • In view of the option of accurate forming and adaptation to unique needs, magnetic components can be produced in a variety of forms and dimensions, which increases their versatility,
  • Huge importance in innovative solutions – they are used in hard drives, electric drive systems, diagnostic systems, also technologically advanced constructions.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Disadvantages

Problematic aspects of neodymium magnets and proposals for their use:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 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 immune to moisture, when using outdoors
  • We suggest casing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated forms.
  • Potential hazard resulting from small fragments 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 disrupt the diagnostic process medical in case of swallowing.
  • With mass production the cost of neodymium magnets can be a barrier,

Lifting parameters

Highest magnetic holding force – what affects it?

Information about lifting capacity was determined for ideal contact conditions, taking into account:
  • using a sheet made of low-carbon steel, serving as a ideal flux conductor
  • with a cross-section minimum 10 mm
  • characterized by smoothness
  • with total lack of distance (no impurities)
  • during detachment in a direction perpendicular to the plane
  • at conditions approx. 20°C

Lifting capacity in real conditions – factors

Holding efficiency is affected by working environment parameters, such as (from most important):
  • Gap (between the magnet and the plate), since even a microscopic distance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin plate does not close the flux, causing part of the power to be lost to the other side.
  • Steel type – mild steel gives the best results. Alloy admixtures reduce magnetic properties and lifting capacity.
  • Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • Temperature – heating the magnet results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity was measured with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate lowers the lifting capacity.

Precautions when working with neodymium magnets
Handling guide

Handle magnets consciously. Their immense force can surprise even experienced users. Be vigilant and do not underestimate their force.

Keep away from children

These products are not intended for children. Accidental ingestion of a few magnets can lead to them attracting across intestines, which constitutes a severe health hazard and necessitates urgent medical intervention.

Cards and drives

Equipment safety: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).

Impact on smartphones

Remember: rare earth magnets produce a field that interferes with precision electronics. Maintain a separation from your phone, device, and navigation systems.

Allergic reactions

Certain individuals have a sensitization to nickel, which is the standard coating for neodymium magnets. Extended handling may cause a rash. It is best to wear protective gloves.

Eye protection

Despite the nickel coating, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Crushing risk

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, crushing everything in their path. Be careful!

Do not overheat magnets

Keep cool. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Dust explosion hazard

Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Danger to pacemakers

For implant holders: Powerful magnets disrupt medical devices. Keep at least 30 cm distance or request help to handle the magnets.

Important! Want to know more? Check our post: Are neodymium magnets dangerous?