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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

Physical simulation of the magnet - report

These information constitute the result of a mathematical simulation. Values are based on models for the class Nd2Fe14B. Operational conditions might slightly deviate from the simulation results. Treat these data as a reference point when designing systems.

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 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
medium risk
20 mm 954 Gs
95.4 mT
2.47 kg / 5.45 pounds
2473.1 g / 24.3 N
medium risk
30 mm 474 Gs
47.4 mT
0.61 kg / 1.35 pounds
610.3 g / 6.0 N
weak grip
50 mm 155 Gs
15.5 mT
0.07 kg / 0.14 pounds
65.6 g / 0.6 N
weak grip

Table 2: Slippage 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 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) - 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 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 (material behavior) - 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: Two magnets (attraction) - 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) - 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
Mobile device 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: Dynamics (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 (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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

*Caution: On a vertical wall, the magnet holds only ~20% of its max power.

2. Steel saturation

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

3. Heat tolerance

*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 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
Quick Unit Converter
Pulling force

Field Strength

Other products

This product is an exceptionally strong cylindrical magnet, produced from modern NdFeB material, which, at dimensions of Ø38x15 mm, guarantees maximum efficiency. The MW 38x15 / N38 component boasts an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for professional 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 Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 393.18 N with a weight of only 127.59 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 38.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are strong enough for the majority of applications in automation and machine building, where excessive 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 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.
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. 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 Nd2Fe14B magnets.

Advantages

Besides their tremendous 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% (based on calculations),
  • Magnets very well defend themselves against loss of magnetization caused by external fields,
  • In other words, due to the metallic layer of nickel, the element is aesthetically pleasing,
  • Neodymium magnets create maximum magnetic induction on a their surface, which allows for strong attraction,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to versatility in forming and the ability to customize to unusual requirements,
  • Huge importance in high-tech industry – they are utilized in magnetic memories, electric motors, medical devices, and multitasking production systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also increases their durability
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Due to limitations in producing nuts and complex forms in magnets, we recommend using a housing - magnetic mount.
  • Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these magnets can complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Highest magnetic holding forcewhat affects it?

Holding force of 40.08 kg is a theoretical maximum value performed under specific, ideal conditions:
  • on a block made of mild steel, optimally conducting the magnetic flux
  • whose transverse dimension equals approx. 10 mm
  • with a plane cleaned and smooth
  • without the slightest insulating layer between the magnet and steel
  • for force acting at a right angle (in the magnet axis)
  • at temperature room level

Magnet lifting force in use – key factors

Effective lifting capacity impacted by specific conditions, including (from most important):
  • Space between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Angle of force application – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Base massiveness – too thin steel does not close the flux, causing part of the flux to be escaped to the other side.
  • Steel grade – ideal substrate is high-permeability steel. Cast iron may have worse magnetic properties.
  • Surface quality – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet and the plate reduces the holding force.

H&S for magnets
Fire warning

Dust generated during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Eye protection

Watch out for shards. Magnets can fracture upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Danger to the youngest

Always keep magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are tragic.

Heat sensitivity

Avoid heat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Danger to pacemakers

Warning for patients: Strong magnetic fields disrupt medical devices. Keep minimum 30 cm distance or request help to work with the magnets.

Bone fractures

Risk of injury: The attraction force is so great that it can result in hematomas, crushing, and broken bones. Use thick gloves.

Electronic hazard

Do not bring magnets close to a purse, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Do not underestimate power

Before starting, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Sensitization to coating

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If redness happens, immediately stop handling magnets and use protective gear.

Precision electronics

Navigation devices and smartphones are highly sensitive to magnetic fields. Direct contact with a strong magnet can permanently damage the sensors in your phone.

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