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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 - 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 magnet - technical parameters

These values are the result of a engineering analysis. Results are based on models for the class Nd2Fe14B. Real-world parameters might slightly deviate from the simulation results. Please consider these data as a reference point for designers.

Table 1: Static force (pull vs gap) - power drop
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
crushing
1 mm 3175 Gs
317.5 mT
30.18 kg / 66.54 lbs
30182.9 g / 296.1 N
crushing
2 mm 3029 Gs
302.9 mT
27.46 kg / 60.55 lbs
27464.0 g / 269.4 N
crushing
3 mm 2875 Gs
287.5 mT
24.74 kg / 54.55 lbs
24742.8 g / 242.7 N
crushing
5 mm 2556 Gs
255.6 mT
19.56 kg / 43.13 lbs
19563.2 g / 191.9 N
crushing
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
weak grip
50 mm 132 Gs
13.2 mT
0.05 kg / 0.12 lbs
52.4 g / 0.5 N
weak grip

Table 2: Sliding hold (vertical surface)
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 (shearing) - 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: Material efficiency (substrate influence) - 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: Thermal stability (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 (repulsion) - field range
MW 38x12 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (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) - warnings
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 (cracking risk) - 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 (Pc)
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%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Caution: On a vertical wall, the magnet retains merely a fraction of its max power.

2. Efficiency vs thickness

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

3. Power loss vs temp

*For N38 material, the critical limit 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.

Engineering data and GPSR
Material specification
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: 010060-2026
Magnet Unit Converter
Pulling force

Field Strength

Other proposals

The offered product is an exceptionally strong cylinder magnet, composed of durable NdFeB material, which, at dimensions of Ø38x12 mm, guarantees maximum efficiency. This specific item boasts a tolerance of ±0.1mm 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 lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force 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.
Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure long-term durability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest 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 protects the surface against external factors, 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.

Strengths

Besides their tremendous magnetic power, neodymium magnets offer the following advantages:
  • They retain magnetic properties for around 10 years – the drop is just ~1% (according to analyses),
  • They are resistant to demagnetization induced by presence of other magnetic fields,
  • The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to look better,
  • They show high magnetic induction at the operating surface, making them more effective,
  • 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 possibility of precise forming and adaptation to custom needs, neodymium magnets can be manufactured in a wide range of forms and dimensions, which expands the range of possible applications,
  • Wide application in future technologies – they are used in computer drives, electric drive systems, advanced medical instruments, as well as industrial machines.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating nuts and complicated shapes in magnets, we propose using a housing - magnetic mechanism.
  • Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • Due to complex production process, their price is higher than average,

Lifting parameters

Magnetic strength at its maximum – what it depends on?

The force parameter is a theoretical maximum value executed under the following configuration:
  • on a base made of mild steel, effectively closing the magnetic flux
  • whose thickness is min. 10 mm
  • characterized by smoothness
  • under conditions of gap-free contact (metal-to-metal)
  • for force applied at a right angle (pull-off, not shear)
  • in stable room temperature

Determinants of lifting force in real conditions

Effective lifting capacity is influenced by specific conditions, including (from priority):
  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Base massiveness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be escaped into the air.
  • Plate material – mild steel attracts best. Higher carbon content lower magnetic permeability and holding force.
  • Base smoothness – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Temperature – temperature increase results in weakening of force. Check the thermal limit for a given model.

Lifting capacity was determined with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, however under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Safe handling of NdFeB magnets
Medical interference

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

Keep away from children

NdFeB magnets are not suitable for play. Eating multiple magnets can lead to them attracting across intestines, which constitutes a direct threat to life and necessitates immediate surgery.

Compass and GPS

Be aware: neodymium magnets produce a field that interferes with sensitive sensors. Maintain a separation from your phone, tablet, and GPS.

Skin irritation risks

Studies show that nickel (standard magnet coating) is a common allergen. If your skin reacts to metals, prevent direct skin contact and select coated magnets.

Mechanical processing

Fire warning: Rare earth powder is explosive. Do not process magnets in home conditions as this risks ignition.

Magnets are brittle

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

Keep away from computers

Very strong magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.

Bodily injuries

Big blocks can crush fingers in a fraction of a second. Under no circumstances put your hand betwixt two attracting surfaces.

Powerful field

Handle magnets consciously. Their powerful strength can surprise even experienced users. Stay alert and do not underestimate their power.

Heat sensitivity

Do not overheat. NdFeB magnets are sensitive to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).

Safety First! Looking for details? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98