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MW 12x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010021

GTIN/EAN: 5906301810209

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

5.09 g

Magnetization Direction

↑ axial

Load capacity

4.60 kg / 45.09 N

Magnetic Induction

437.99 mT / 4380 Gs

Coating

[NiCuNi] Nickel

1.882 with VAT / pcs + price for transport

1.530 ZŁ net + 23% VAT / pcs

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Detailed specification - MW 12x6 / N38 - cylindrical magnet

Specification / characteristics - MW 12x6 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010021
GTIN/EAN 5906301810209
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 12 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 5.09 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.60 kg / 45.09 N
Magnetic Induction ~ ? 437.99 mT / 4380 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x6 / 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 modeling of the product - data

Presented values are the outcome of a engineering calculation. Results were calculated on models for the material Nd2Fe14B. Operational performance might slightly deviate from the simulation results. Please consider these calculations as a supplementary guide when designing systems.

Table 1: Static force (pull vs gap) - interaction chart
MW 12x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4377 Gs
437.7 mT
4.60 kg / 10.14 lbs
4600.0 g / 45.1 N
warning
1 mm 3688 Gs
368.8 mT
3.27 kg / 7.20 lbs
3265.4 g / 32.0 N
warning
2 mm 2999 Gs
299.9 mT
2.16 kg / 4.76 lbs
2159.7 g / 21.2 N
warning
3 mm 2386 Gs
238.6 mT
1.37 kg / 3.01 lbs
1366.7 g / 13.4 N
weak grip
5 mm 1474 Gs
147.4 mT
0.52 kg / 1.15 lbs
521.4 g / 5.1 N
weak grip
10 mm 489 Gs
48.9 mT
0.06 kg / 0.13 lbs
57.4 g / 0.6 N
weak grip
15 mm 205 Gs
20.5 mT
0.01 kg / 0.02 lbs
10.1 g / 0.1 N
weak grip
20 mm 103 Gs
10.3 mT
0.00 kg / 0.01 lbs
2.5 g / 0.0 N
weak grip
30 mm 36 Gs
3.6 mT
0.00 kg / 0.00 lbs
0.3 g / 0.0 N
weak grip
50 mm 9 Gs
0.9 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip

Table 2: Shear capacity (wall)
MW 12x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.92 kg / 2.03 lbs
920.0 g / 9.0 N
1 mm Stal (~0.2) 0.65 kg / 1.44 lbs
654.0 g / 6.4 N
2 mm Stal (~0.2) 0.43 kg / 0.95 lbs
432.0 g / 4.2 N
3 mm Stal (~0.2) 0.27 kg / 0.60 lbs
274.0 g / 2.7 N
5 mm Stal (~0.2) 0.10 kg / 0.23 lbs
104.0 g / 1.0 N
10 mm Stal (~0.2) 0.01 kg / 0.03 lbs
12.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 12x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.38 kg / 3.04 lbs
1380.0 g / 13.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.92 kg / 2.03 lbs
920.0 g / 9.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.46 kg / 1.01 lbs
460.0 g / 4.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.30 kg / 5.07 lbs
2300.0 g / 22.6 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 12x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.46 kg / 1.01 lbs
460.0 g / 4.5 N
1 mm
25%
1.15 kg / 2.54 lbs
1150.0 g / 11.3 N
2 mm
50%
2.30 kg / 5.07 lbs
2300.0 g / 22.6 N
3 mm
75%
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
5 mm
100%
4.60 kg / 10.14 lbs
4600.0 g / 45.1 N
10 mm
100%
4.60 kg / 10.14 lbs
4600.0 g / 45.1 N
11 mm
100%
4.60 kg / 10.14 lbs
4600.0 g / 45.1 N
12 mm
100%
4.60 kg / 10.14 lbs
4600.0 g / 45.1 N

Table 5: Working in heat (material behavior) - resistance threshold
MW 12x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.60 kg / 10.14 lbs
4600.0 g / 45.1 N
OK
40 °C -2.2% 4.50 kg / 9.92 lbs
4498.8 g / 44.1 N
OK
60 °C -4.4% 4.40 kg / 9.70 lbs
4397.6 g / 43.1 N
80 °C -6.6% 4.30 kg / 9.47 lbs
4296.4 g / 42.1 N
100 °C -28.8% 3.28 kg / 7.22 lbs
3275.2 g / 32.1 N

Table 6: Two magnets (attraction) - forces in the system
MW 12x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 13.36 kg / 29.45 lbs
5 536 Gs
2.00 kg / 4.42 lbs
2004 g / 19.7 N
N/A
1 mm 11.39 kg / 25.10 lbs
8 082 Gs
1.71 kg / 3.77 lbs
1708 g / 16.8 N
10.25 kg / 22.59 lbs
~0 Gs
2 mm 9.48 kg / 20.91 lbs
7 376 Gs
1.42 kg / 3.14 lbs
1423 g / 14.0 N
8.54 kg / 18.82 lbs
~0 Gs
3 mm 7.77 kg / 17.12 lbs
6 675 Gs
1.17 kg / 2.57 lbs
1165 g / 11.4 N
6.99 kg / 15.41 lbs
~0 Gs
5 mm 5.01 kg / 11.05 lbs
5 361 Gs
0.75 kg / 1.66 lbs
752 g / 7.4 N
4.51 kg / 9.94 lbs
~0 Gs
10 mm 1.51 kg / 3.34 lbs
2 948 Gs
0.23 kg / 0.50 lbs
227 g / 2.2 N
1.36 kg / 3.01 lbs
~0 Gs
20 mm 0.17 kg / 0.37 lbs
978 Gs
0.02 kg / 0.06 lbs
25 g / 0.2 N
0.15 kg / 0.33 lbs
~0 Gs
50 mm 0.00 kg / 0.01 lbs
116 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.00 lbs
72 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
48 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
33 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
90 mm 0.00 kg / 0.00 lbs
24 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
100 mm 0.00 kg / 0.00 lbs
18 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Safety (HSE) (implants) - warnings
MW 12x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.5 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Mechanical watch 20 Gs (2.0 mT) 4.0 cm
Mobile device 40 Gs (4.0 mT) 3.0 cm
Remote 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm

Table 8: Dynamics (kinetic energy) - warning
MW 12x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 30.55 km/h
(8.49 m/s)
0.18 J
30 mm 52.51 km/h
(14.59 m/s)
0.54 J
50 mm 67.79 km/h
(18.83 m/s)
0.90 J
100 mm 95.87 km/h
(26.63 m/s)
1.81 J

Table 9: Coating parameters (durability)
MW 12x6 / 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 12x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 024 Mx 50.2 µWb
Pc Coefficient 0.59 Low (Flat)

Table 11: Hydrostatics and buoyancy
MW 12x6 / N38

Environment Effective steel pull Effect
Air (land) 4.60 kg Standard
Water (riverbed) 5.27 kg
(+0.67 kg buoyancy gain)
+14.5%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Sliding resistance

*Warning: On a vertical surface, the magnet holds merely ~20% of its max power.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.

3. Thermal stability

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.59

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
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%
Ecology and recycling (GPSR)
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: 010021-2026
Magnet Unit Converter
Force (pull)

Magnetic Induction

Other proposals

This product is an extremely powerful cylinder magnet, made from durable NdFeB material, which, with dimensions of Ø12x6 mm, guarantees maximum efficiency. The MW 12x6 / N38 model features an accuracy of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 4.60 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 45.09 N with a weight of only 5.09 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 12.1 mm) using two-component epoxy glues. To ensure stability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest magnets in the same volume (Ø12x6), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 6 mm. The key parameter here is the holding force amounting to approximately 4.60 kg (force ~45.09 N), which, with such defined dimensions, proves the high power of the NdFeB material. 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 12 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 through the diameter if your project requires it.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • Their strength is maintained, and after approximately 10 years it drops only by ~1% (theoretically),
  • They are resistant to demagnetization induced by presence of other magnetic fields,
  • By covering with a smooth layer of silver, the element gains an professional look,
  • The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to flexibility in shaping and the capacity to adapt to unusual requirements,
  • Wide application in modern industrial fields – they serve a role in data components, drive modules, precision medical tools, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in compact constructions

Weaknesses

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in realizing nuts and complex forms in magnets, we recommend using a housing - magnetic mount.
  • Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical when they are in the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Holding force characteristics

Highest magnetic holding forcewhat affects it?

The specified lifting capacity concerns the peak performance, measured under optimal environment, meaning:
  • using a plate made of mild steel, acting as a ideal flux conductor
  • with a cross-section no less than 10 mm
  • with a surface cleaned and smooth
  • under conditions of ideal adhesion (surface-to-surface)
  • during detachment in a direction perpendicular to the mounting surface
  • at standard ambient temperature

Key elements affecting lifting force

During everyday use, the actual lifting capacity is determined by many variables, ranked from crucial:
  • Air gap (between the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Plate material – low-carbon steel gives the best results. Higher carbon content decrease magnetic permeability and holding force.
  • Surface structure – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Temperature – temperature increase results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet’s surface and the plate decreases the holding force.

Precautions when working with NdFeB magnets
Medical interference

Life threat: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Physical harm

Pinching hazard: The attraction force is so immense that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Precision electronics

An intense magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Do not bring magnets close to a device to avoid breaking the sensors.

Beware of splinters

Watch out for shards. Magnets can fracture upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Keep away from children

Only for adults. Tiny parts pose a choking risk, causing severe trauma. Store out of reach of children and animals.

Threat to electronics

Device Safety: Strong magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, timepieces).

Handling rules

Use magnets consciously. Their huge power can shock even professionals. Plan your moves and do not underestimate their force.

Operating temperature

Watch the temperature. Heating the magnet to high heat will ruin its magnetic structure and pulling force.

Do not drill into magnets

Machining of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Metal Allergy

Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness happens, immediately stop handling magnets and wear gloves.

Caution! Need more info? Read our article: Why are neodymium magnets dangerous?