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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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Product card - 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 - data

The following values constitute the result of a engineering simulation. Values were calculated on algorithms for the material Nd2Fe14B. Real-world conditions might slightly deviate from the simulation results. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static pull 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 pounds
40080.0 g / 393.2 N
critical level
1 mm 3668 Gs
366.8 mT
36.56 kg / 80.61 pounds
36563.4 g / 358.7 N
critical level
2 mm 3485 Gs
348.5 mT
33.01 kg / 72.78 pounds
33011.6 g / 323.8 N
critical level
3 mm 3297 Gs
329.7 mT
29.55 kg / 65.14 pounds
29545.5 g / 289.8 N
critical level
5 mm 2917 Gs
291.7 mT
23.13 kg / 50.99 pounds
23128.9 g / 226.9 N
critical level
10 mm 2049 Gs
204.9 mT
11.41 kg / 25.15 pounds
11406.3 g / 111.9 N
critical level
15 mm 1396 Gs
139.6 mT
5.30 kg / 11.68 pounds
5297.4 g / 52.0 N
strong
20 mm 954 Gs
95.4 mT
2.47 kg / 5.45 pounds
2473.1 g / 24.3 N
strong
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: Sliding 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 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: 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 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 (attraction) - forces in the system
MW 38x15 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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: Hazards (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: Impact energy (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: Surface protection spec
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: Physics of underwater searching
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Vertical hold

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

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) drastically limits the holding force.

3. Thermal stability

*For standard magnets, 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

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
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%
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 incredibly powerful cylinder magnet, produced from advanced NdFeB material, which, at dimensions of Ø38x15 mm, guarantees optimal power. This specific item boasts high dimensional repeatability and industrial build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 40.08 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient magnetic separators, 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 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 precision component. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Magnets N38 are suitable 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 warehouse.
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 key parameter here is the holding force amounting to approximately 40.08 kg (force ~393.18 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it 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. 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.

Advantages as well as disadvantages of rare earth magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They retain magnetic properties for almost ten years – the drop is just ~1% (according to analyses),
  • Magnets perfectly protect themselves against loss of magnetization caused by ambient magnetic noise,
  • Thanks to the reflective finish, the coating of nickel, gold-plated, or silver-plated gives an aesthetic appearance,
  • 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...
  • Thanks to freedom in constructing and the capacity to modify to specific needs,
  • Key role in future technologies – they are used in computer drives, electromotive mechanisms, medical equipment, as well as modern systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Weaknesses

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 strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in creating nuts and complex forms in magnets, we recommend using a housing - magnetic mechanism.
  • 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. Additionally, small components of these devices can disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets is a challenge,

Holding force characteristics

Detachment force of the magnet in optimal conditionswhat contributes to it?

Information about lifting capacity was determined for ideal contact conditions, assuming:
  • using a plate made of high-permeability steel, serving as a magnetic yoke
  • whose transverse dimension equals approx. 10 mm
  • characterized by even structure
  • without any air gap between the magnet and steel
  • under perpendicular force direction (90-degree angle)
  • in temp. approx. 20°C

Key elements affecting lifting force

Please note that the magnet holding may be lower subject to the following factors, in order of importance:
  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds much less (often approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material composition – different alloys reacts the same. Alloy additives worsen the attraction effect.
  • Plate texture – smooth surfaces ensure maximum contact, which increases force. Rough surfaces reduce efficiency.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was measured with the use of a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under shearing force the holding force is lower. In addition, even a minimal clearance between the magnet and the plate reduces the load capacity.

Warnings
Nickel coating and allergies

Some people suffer from a contact allergy to Ni, which is the standard coating for neodymium magnets. Prolonged contact can result in dermatitis. It is best to wear protective gloves.

Choking Hazard

Adult use only. Small elements can be swallowed, causing intestinal necrosis. Keep out of reach of kids and pets.

Physical harm

Danger of trauma: The pulling power is so immense that it can cause hematomas, crushing, and broken bones. Protective gloves are recommended.

Precision electronics

A strong magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Maintain magnets near a device to prevent damaging the sensors.

Life threat

Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

Respect the power

Before use, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Electronic devices

Very strong magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

Machining danger

Dust created during machining of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Fragile material

Watch out for shards. Magnets can explode upon violent connection, launching sharp fragments into the air. Wear goggles.

Heat sensitivity

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

Caution! More info about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98