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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 data - 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

Engineering analysis of the magnet - technical parameters

These values constitute the outcome of a engineering calculation. Values are based on models for the material Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Treat these data as a supplementary guide for designers.

Table 1: Static pull force (pull vs distance) - 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
dangerous!
1 mm 3175 Gs
317.5 mT
30.18 kg / 66.54 LBS
30182.9 g / 296.1 N
dangerous!
2 mm 3029 Gs
302.9 mT
27.46 kg / 60.55 LBS
27464.0 g / 269.4 N
dangerous!
3 mm 2875 Gs
287.5 mT
24.74 kg / 54.55 LBS
24742.8 g / 242.7 N
dangerous!
5 mm 2556 Gs
255.6 mT
19.56 kg / 43.13 LBS
19563.2 g / 191.9 N
dangerous!
10 mm 1805 Gs
180.5 mT
9.75 kg / 21.50 LBS
9750.4 g / 95.7 N
strong
15 mm 1229 Gs
122.9 mT
4.52 kg / 9.96 LBS
4519.1 g / 44.3 N
strong
20 mm 836 Gs
83.6 mT
2.09 kg / 4.61 LBS
2092.9 g / 20.5 N
strong
30 mm 411 Gs
41.1 mT
0.51 kg / 1.11 LBS
505.7 g / 5.0 N
safe
50 mm 132 Gs
13.2 mT
0.05 kg / 0.12 LBS
52.4 g / 0.5 N
safe

Table 2: Vertical hold (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: Wall mounting (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 (saturation) - power losses
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: Working in heat (material behavior) - resistance threshold
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) - forces in the system
MW 38x12 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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: Hazards (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
Mobile device 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: Impact energy (kinetic energy) - collision effects
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: Anti-corrosion coating 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: Submerged application
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)

*Note: On a vertical wall, the magnet holds just approx. 20-30% of its max power.

2. Steel thickness impact

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

3. Heat tolerance

*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) = 0.42

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: 010060-2026
Measurement Calculator
Force (pull)

Field Strength

Other proposals

The presented product is a very strong cylinder magnet, manufactured from modern NdFeB material, which, at dimensions of Ø38x12 mm, guarantees optimal power. This specific item features high dimensional repeatability and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 32.79 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 321.71 N with a weight of only 102.07 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 38.1 mm) using epoxy glues. To ensure stability 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 operational stability. 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 warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 38 mm and height 12 mm. The value of 321.71 N means that the magnet is capable of holding a weight many times exceeding its own mass of 102.07 g. 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 and disadvantages of neodymium magnets.

Pros

Besides their exceptional field intensity, neodymium magnets offer the following advantages:
  • Their strength remains stable, and after around ten years it decreases only by ~1% (theoretically),
  • They are resistant to demagnetization induced by external field influence,
  • A magnet with a metallic gold surface has better aesthetics,
  • Magnets are distinguished by excellent magnetic induction on the surface,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Due to the option of flexible shaping and adaptation to custom projects, NdFeB magnets can be manufactured in a variety of shapes and sizes, which makes them more universal,
  • Key role in advanced technology sectors – they serve a role in magnetic memories, electric motors, medical devices, and industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons

Disadvantages of neodymium magnets:
  • At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their strength 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 stability even at temperatures up to 230°C
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • We recommend a housing - magnetic mount, due to difficulties in creating nuts inside the magnet and complex shapes.
  • Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can complicate diagnosis medical after entering the body.
  • Due to neodymium price, their price is higher than average,

Pull force analysis

Maximum holding power of the magnet – what affects it?

Breakaway force was defined for ideal contact conditions, assuming:
  • using a sheet made of high-permeability steel, acting as a ideal flux conductor
  • possessing a massiveness of min. 10 mm to avoid saturation
  • characterized by smoothness
  • under conditions of ideal adhesion (surface-to-surface)
  • during detachment in a direction vertical to the mounting surface
  • at ambient temperature approx. 20 degrees Celsius

Determinants of lifting force in real conditions

In practice, the actual lifting capacity depends on a number of factors, ranked from most significant:
  • Distance – the presence of any layer (paint, tape, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Plate thickness – insufficiently thick plate does not accept the full field, causing part of the flux to be lost to the other side.
  • Material type – ideal substrate is pure iron steel. Hardened steels may generate lower lifting capacity.
  • Surface finish – full contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Thermal factor – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet and the plate decreases the lifting capacity.

Safe handling of NdFeB magnets
Swallowing risk

NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them attracting across intestines, which poses a direct threat to life and necessitates immediate surgery.

Data carriers

Powerful magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Health Danger

People with a pacemaker should maintain an absolute distance from magnets. The magnetic field can interfere with the functioning of the implant.

Nickel coating and allergies

Some people experience a contact allergy to nickel, which is the common plating for neodymium magnets. Extended handling may cause an allergic reaction. We recommend wear safety gloves.

Protective goggles

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

Do not underestimate power

Use magnets with awareness. Their immense force can shock even professionals. Be vigilant and do not underestimate their power.

Flammability

Machining of NdFeB material carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Permanent damage

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

Physical harm

Large magnets can smash fingers in a fraction of a second. Under no circumstances put your hand between two attracting surfaces.

Impact on smartphones

Note: neodymium magnets generate a field that confuses sensitive sensors. Maintain a safe distance from your phone, device, and navigation systems.

Warning! Need more info? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98