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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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Lifting power along with appearance of neodymium magnets can be checked with our magnetic mass calculator.

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Technical data 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

Engineering simulation of the magnet - technical parameters

These information represent the outcome of a engineering analysis. Results are based on models for the class Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Please consider these data as a supplementary guide when designing systems.

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 pounds
32790.0 g / 321.7 N
dangerous!
1 mm 3175 Gs
317.5 mT
30.18 kg / 66.54 pounds
30182.9 g / 296.1 N
dangerous!
2 mm 3029 Gs
302.9 mT
27.46 kg / 60.55 pounds
27464.0 g / 269.4 N
dangerous!
3 mm 2875 Gs
287.5 mT
24.74 kg / 54.55 pounds
24742.8 g / 242.7 N
dangerous!
5 mm 2556 Gs
255.6 mT
19.56 kg / 43.13 pounds
19563.2 g / 191.9 N
dangerous!
10 mm 1805 Gs
180.5 mT
9.75 kg / 21.50 pounds
9750.4 g / 95.7 N
strong
15 mm 1229 Gs
122.9 mT
4.52 kg / 9.96 pounds
4519.1 g / 44.3 N
strong
20 mm 836 Gs
83.6 mT
2.09 kg / 4.61 pounds
2092.9 g / 20.5 N
strong
30 mm 411 Gs
41.1 mT
0.51 kg / 1.11 pounds
505.7 g / 5.0 N
safe
50 mm 132 Gs
13.2 mT
0.05 kg / 0.12 pounds
52.4 g / 0.5 N
safe

Table 2: Shear capacity (wall)
MW 38x12 / N38

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

Table 3: Vertical assembly (sliding) - vertical pull
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 pounds
9837.0 g / 96.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
6.56 kg / 14.46 pounds
6558.0 g / 64.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
3.28 kg / 7.23 pounds
3279.0 g / 32.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
16.40 kg / 36.14 pounds
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 pounds
1639.5 g / 16.1 N
1 mm
13%
4.10 kg / 9.04 pounds
4098.8 g / 40.2 N
2 mm
25%
8.20 kg / 18.07 pounds
8197.5 g / 80.4 N
3 mm
38%
12.30 kg / 27.11 pounds
12296.3 g / 120.6 N
5 mm
63%
20.49 kg / 45.18 pounds
20493.8 g / 201.0 N
10 mm
100%
32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
11 mm
100%
32.79 kg / 72.29 pounds
32790.0 g / 321.7 N
12 mm
100%
32.79 kg / 72.29 pounds
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 pounds
32790.0 g / 321.7 N
OK
40 °C -2.2% 32.07 kg / 70.70 pounds
32068.6 g / 314.6 N
OK
60 °C -4.4% 31.35 kg / 69.11 pounds
31347.2 g / 307.5 N
80 °C -6.6% 30.63 kg / 67.52 pounds
30625.9 g / 300.4 N
100 °C -28.8% 23.35 kg / 51.47 pounds
23346.5 g / 229.0 N

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

Table 7: Hazards (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
Phone / Smartphone 40 Gs (4.0 mT) 8.0 cm
Car key 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) - 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: 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: 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 surface, the magnet holds only approx. 20-30% of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically limits the holding force.

3. Power loss vs temp

*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 specification and ecology
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

Magnetic Induction

Other offers

The offered product is an incredibly powerful rod magnet, made from advanced NdFeB material, which, at dimensions of Ø38x12 mm, guarantees the highest energy density. The MW 38x12 / N38 component features a tolerance of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 32.79 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening 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 every gram matters.
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 professional component. To ensure stability 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 NdFeB grade N38 are suitable for 90% of applications in automation and machine building, where excessive miniaturization with maximum force is not required. 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 in continuous sale 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 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 most desirable 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 rare earth magnets.

Advantages

Besides their durability, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over around 10 years their performance decreases symbolically – ~1% (in testing),
  • They have excellent resistance to magnetic field loss due to external magnetic sources,
  • Thanks to the reflective finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an visually attractive appearance,
  • Magnetic induction on the top side of the magnet turns out to be extremely intense,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures approaching 230°C and above...
  • In view of the potential of precise forming and adaptation to specialized requirements, neodymium magnets can be created in a broad palette of shapes and sizes, which amplifies use scope,
  • Significant place in advanced technology sectors – they are used in hard drives, electric drive systems, diagnostic systems, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in miniature devices

Limitations

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Limited ability of producing threads in the magnet and complicated forms - recommended is casing - magnet mounting.
  • Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these devices can be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Maximum holding power of the magnet – what affects it?

The lifting capacity listed is a measurement result conducted under standard conditions:
  • using a base made of low-carbon steel, functioning as a ideal flux conductor
  • possessing a thickness of at least 10 mm to avoid saturation
  • with a surface perfectly flat
  • under conditions of no distance (metal-to-metal)
  • during pulling in a direction perpendicular to the plane
  • at standard ambient temperature

Practical lifting capacity: influencing factors

In real-world applications, the real power depends on several key aspects, listed from the most important:
  • Clearance – existence of foreign body (rust, dirt, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
  • Direction of force – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Steel grade – ideal substrate is high-permeability steel. Stainless steels may have worse magnetic properties.
  • Surface finish – ideal contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
  • Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

Safe handling of NdFeB magnets
Bone fractures

Pinching hazard: The pulling power is so immense that it can cause blood blisters, pinching, and broken bones. Use thick gloves.

Handling rules

Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Swallowing risk

Product intended for adults. Tiny parts can be swallowed, causing severe trauma. Keep out of reach of children and animals.

Compass and GPS

A powerful magnetic field negatively affects the operation of compasses in phones and GPS navigation. Maintain magnets near a device to avoid damaging the sensors.

Operating temperature

Standard neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Allergy Warning

Some people experience a sensitization to nickel, which is the typical protective layer for neodymium magnets. Extended handling may cause dermatitis. It is best to wear protective gloves.

Combustion hazard

Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Protect data

Powerful magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Stay away of min. 10 cm.

Danger to pacemakers

Medical warning: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.

Fragile material

Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Wear goggles.

Danger! Details about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98