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MW 38x12 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010060

GTIN/EAN: 5906301810599

Diameter Ø

38 mm [±0,1 mm]

Height

12 mm [±0,1 mm]

Weight

102.07 g

Magnetization Direction

↑ axial

Load capacity

32.79 kg / 321.71 N

Magnetic Induction

331.00 mT / 3310 Gs

Coating

[NiCuNi] Nickel

32.10 with VAT / pcs + price for transport

26.10 ZŁ net + 23% VAT / pcs

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Technical of the product - MW 38x12 / N38 - cylindrical magnet

Specification / characteristics - MW 38x12 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010060
GTIN/EAN 5906301810599
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 12 mm [±0,1 mm]
Weight 102.07 g
Magnetization Direction ↑ axial
Load capacity ~ ? 32.79 kg / 321.71 N
Magnetic Induction ~ ? 331.00 mT / 3310 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 38x12 / 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 product - technical parameters

Presented information represent the result of a engineering calculation. Results are based on algorithms for the class Nd2Fe14B. Operational performance may deviate from the simulation results. Please consider these calculations as a supplementary guide during assembly planning.

Table 1: Static pull force (force vs gap) - characteristics
MW 38x12 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3309 Gs
330.9 mT
32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
critical level
1 mm 3175 Gs
317.5 mT
30.18 kg / 66.54 lbs
30182.9 g / 296.1 N
critical level
2 mm 3029 Gs
302.9 mT
27.46 kg / 60.55 lbs
27464.0 g / 269.4 N
critical level
3 mm 2875 Gs
287.5 mT
24.74 kg / 54.55 lbs
24742.8 g / 242.7 N
critical level
5 mm 2556 Gs
255.6 mT
19.56 kg / 43.13 lbs
19563.2 g / 191.9 N
critical level
10 mm 1805 Gs
180.5 mT
9.75 kg / 21.50 lbs
9750.4 g / 95.7 N
medium risk
15 mm 1229 Gs
122.9 mT
4.52 kg / 9.96 lbs
4519.1 g / 44.3 N
medium risk
20 mm 836 Gs
83.6 mT
2.09 kg / 4.61 lbs
2092.9 g / 20.5 N
medium risk
30 mm 411 Gs
41.1 mT
0.51 kg / 1.11 lbs
505.7 g / 5.0 N
low risk
50 mm 132 Gs
13.2 mT
0.05 kg / 0.12 lbs
52.4 g / 0.5 N
low risk

Table 2: Vertical load (wall)
MW 38x12 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 6.56 kg / 14.46 lbs
6558.0 g / 64.3 N
1 mm Stal (~0.2) 6.04 kg / 13.31 lbs
6036.0 g / 59.2 N
2 mm Stal (~0.2) 5.49 kg / 12.11 lbs
5492.0 g / 53.9 N
3 mm Stal (~0.2) 4.95 kg / 10.91 lbs
4948.0 g / 48.5 N
5 mm Stal (~0.2) 3.91 kg / 8.62 lbs
3912.0 g / 38.4 N
10 mm Stal (~0.2) 1.95 kg / 4.30 lbs
1950.0 g / 19.1 N
15 mm Stal (~0.2) 0.90 kg / 1.99 lbs
904.0 g / 8.9 N
20 mm Stal (~0.2) 0.42 kg / 0.92 lbs
418.0 g / 4.1 N
30 mm Stal (~0.2) 0.10 kg / 0.22 lbs
102.0 g / 1.0 N
50 mm Stal (~0.2) 0.01 kg / 0.02 lbs
10.0 g / 0.1 N

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 38x12 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
9.84 kg / 21.69 lbs
9837.0 g / 96.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
6.56 kg / 14.46 lbs
6558.0 g / 64.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
3.28 kg / 7.23 lbs
3279.0 g / 32.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
16.40 kg / 36.14 lbs
16395.0 g / 160.8 N

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 38x12 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
1.64 kg / 3.61 lbs
1639.5 g / 16.1 N
1 mm
13%
4.10 kg / 9.04 lbs
4098.8 g / 40.2 N
2 mm
25%
8.20 kg / 18.07 lbs
8197.5 g / 80.4 N
3 mm
38%
12.30 kg / 27.11 lbs
12296.3 g / 120.6 N
5 mm
63%
20.49 kg / 45.18 lbs
20493.8 g / 201.0 N
10 mm
100%
32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
11 mm
100%
32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
12 mm
100%
32.79 kg / 72.29 lbs
32790.0 g / 321.7 N

Table 5: Thermal stability (stability) - power drop
MW 38x12 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
OK
40 °C -2.2% 32.07 kg / 70.70 lbs
32068.6 g / 314.6 N
OK
60 °C -4.4% 31.35 kg / 69.11 lbs
31347.2 g / 307.5 N
80 °C -6.6% 30.63 kg / 67.52 lbs
30625.9 g / 300.4 N
100 °C -28.8% 23.35 kg / 51.47 lbs
23346.5 g / 229.0 N

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 38x12 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 76.58 kg / 168.83 lbs
4 859 Gs
11.49 kg / 25.32 lbs
11487 g / 112.7 N
N/A
1 mm 73.60 kg / 162.27 lbs
6 489 Gs
11.04 kg / 24.34 lbs
11040 g / 108.3 N
66.24 kg / 146.04 lbs
~0 Gs
2 mm 70.49 kg / 155.40 lbs
6 350 Gs
10.57 kg / 23.31 lbs
10573 g / 103.7 N
63.44 kg / 139.86 lbs
~0 Gs
3 mm 67.33 kg / 148.43 lbs
6 206 Gs
10.10 kg / 22.26 lbs
10099 g / 99.1 N
60.59 kg / 133.59 lbs
~0 Gs
5 mm 60.95 kg / 134.38 lbs
5 905 Gs
9.14 kg / 20.16 lbs
9143 g / 89.7 N
54.86 kg / 120.94 lbs
~0 Gs
10 mm 45.69 kg / 100.73 lbs
5 113 Gs
6.85 kg / 15.11 lbs
6853 g / 67.2 N
41.12 kg / 90.65 lbs
~0 Gs
20 mm 22.77 kg / 50.20 lbs
3 609 Gs
3.42 kg / 7.53 lbs
3416 g / 33.5 N
20.49 kg / 45.18 lbs
~0 Gs
50 mm 2.34 kg / 5.17 lbs
1 158 Gs
0.35 kg / 0.78 lbs
352 g / 3.5 N
2.11 kg / 4.65 lbs
~0 Gs
60 mm 1.18 kg / 2.60 lbs
822 Gs
0.18 kg / 0.39 lbs
177 g / 1.7 N
1.06 kg / 2.34 lbs
~0 Gs
70 mm 0.63 kg / 1.38 lbs
598 Gs
0.09 kg / 0.21 lbs
94 g / 0.9 N
0.56 kg / 1.24 lbs
~0 Gs
80 mm 0.35 kg / 0.77 lbs
446 Gs
0.05 kg / 0.12 lbs
52 g / 0.5 N
0.31 kg / 0.69 lbs
~0 Gs
90 mm 0.20 kg / 0.45 lbs
340 Gs
0.03 kg / 0.07 lbs
30 g / 0.3 N
0.18 kg / 0.40 lbs
~0 Gs
100 mm 0.12 kg / 0.27 lbs
264 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
0.11 kg / 0.24 lbs
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
MW 38x12 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 17.0 cm
Hearing aid 10 Gs (1.0 mT) 13.5 cm
Timepiece 20 Gs (2.0 mT) 10.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 8.0 cm
Remote 50 Gs (5.0 mT) 7.5 cm
Payment card 400 Gs (40.0 mT) 3.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.5 cm

Table 8: Collisions (cracking risk) - warning
MW 38x12 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 21.17 km/h
(5.88 m/s)
1.76 J
30 mm 31.61 km/h
(8.78 m/s)
3.93 J
50 mm 40.46 km/h
(11.24 m/s)
6.45 J
100 mm 57.16 km/h
(15.88 m/s)
12.87 J

Table 9: Coating parameters (durability)
MW 38x12 / 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 38x12 / N38

Parameter Value SI Unit / Description
Magnetic Flux 40 045 Mx 400.5 µWb
Pc Coefficient 0.42 Low (Flat)

Table 11: Physics of underwater searching
MW 38x12 / N38

Environment Effective steel pull Effect
Air (land) 32.79 kg Standard
Water (riverbed) 37.54 kg
(+4.75 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. Wall mount (shear)

*Warning: On a vertical surface, the magnet holds only approx. 20-30% of its max power.

2. Steel saturation

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

3. Heat tolerance

*For N38 grade, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.42

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 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: 010060-2026
Measurement Calculator
Force (pull)

Magnetic Induction

Check out more products

The offered product is an incredibly powerful rod magnet, composed of advanced NdFeB material, which, at dimensions of Ø38x12 mm, guarantees the highest energy density. This specific item boasts an accuracy of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 32.79 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the pull force of 321.71 N with a weight of only 102.07 g, this rod is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 38.1 mm) using epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives 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 high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø38x12), 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 Ø38x12 mm, which, at a weight of 102.07 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 32.79 kg (force ~321.71 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 12 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 through the diameter if your project requires it.

Advantages and disadvantages of Nd2Fe14B magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They do not lose strength, even over around 10 years – the decrease in power is only ~1% (according to tests),
  • They retain their magnetic properties even under strong external field,
  • The use of an refined finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Neodymium magnets ensure maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures approaching 230°C and above...
  • Due to the option of flexible forming and adaptation to custom requirements, magnetic components can be manufactured in a variety of geometric configurations, which expands the range of possible applications,
  • Versatile presence in modern technologies – they serve a role in mass storage devices, motor assemblies, diagnostic systems, also modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Cons

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited ability of creating nuts in the magnet and complex shapes - recommended is a housing - mounting mechanism.
  • Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the context of child health protection. It is also worth noting that small components of these devices are able to complicate diagnosis medical when they are in the body.
  • Due to expensive raw materials, their price exceeds standard values,

Holding force characteristics

Best holding force of the magnet in ideal parameterswhat it depends on?

The specified lifting capacity concerns the limit force, measured under ideal test conditions, meaning:
  • with the contact of a sheet made of special test steel, ensuring full magnetic saturation
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • with direct contact (no paint)
  • during detachment in a direction vertical to the plane
  • in temp. approx. 20°C

Magnet lifting force in use – key factors

In practice, the real power is determined by a number of factors, listed from the most important:
  • Distance (between the magnet and the plate), since even a microscopic distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin sheet causes magnetic saturation, causing part of the power to be escaped to the other side.
  • Steel type – mild steel gives the best results. Higher carbon content decrease magnetic permeability and lifting capacity.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal weaken the grip.
  • Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was measured by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with NdFeB magnets
Maximum temperature

Do not overheat. NdFeB magnets are sensitive to heat. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Impact on smartphones

Note: neodymium magnets produce a field that confuses sensitive sensors. Keep a safe distance from your mobile, device, and GPS.

Physical harm

Large magnets can break fingers in a fraction of a second. Never put your hand between two attracting surfaces.

This is not a toy

Adult use only. Tiny parts pose a choking risk, causing severe trauma. Store out of reach of kids and pets.

Handling guide

Use magnets with awareness. Their immense force can surprise even experienced users. Stay alert and respect their force.

Pacemakers

Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Protect data

Powerful magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Stay away of at least 10 cm.

Avoid contact if allergic

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction appears, cease working with magnets and wear gloves.

Do not drill into magnets

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

Eye protection

Despite the nickel coating, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Security! Want to know more? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98