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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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Parameters as well as form of neodymium magnets can be verified with our magnetic calculator.

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Technical parameters - 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

Physical modeling of the assembly - technical parameters

These information are the outcome of a engineering simulation. Results rely on algorithms for the class Nd2Fe14B. Actual performance might slightly deviate from the simulation results. Use these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs gap) - power drop
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: Slippage capacity (vertical surface)
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: Steel thickness (substrate influence) - power losses
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: Thermal resistance (stability) - 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: Magnet-Magnet interaction (attraction) - field range
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: Hazards (implants) - precautionary measures
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
Timepiece 20 Gs (2.0 mT) 4.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 3.0 cm
Car key 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: Impact energy (cracking risk) - 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: Surface protection spec
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: Construction data (Flux)
MW 12x6 / N38

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

Table 11: Submerged application
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%
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. Wall mount (shear)

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

2. Steel thickness impact

*Thin steel (e.g. computer case) drastically weakens the holding force.

3. Thermal stability

*For N38 grade, 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

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 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
Quick Unit Converter
Force (pull)

Magnetic Field

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The presented product is a very strong rod magnet, composed of durable NdFeB material, which, with dimensions of Ø12x6 mm, guarantees maximum efficiency. This specific item is characterized by 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. 4.60 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Moreover, 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 created for building electric motors, advanced 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 rod is indispensable in miniature devices and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. 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 warehouse.
This model is characterized by dimensions Ø12x6 mm, which, at a weight of 5.09 g, makes it an element with impressive magnetic energy density. The value of 45.09 N means that the magnet is capable of holding a weight many times exceeding its own mass of 5.09 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 6 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 rare earth magnets.

Advantages

Besides their remarkable pulling force, neodymium magnets offer the following advantages:
  • Their magnetic field is durable, and after approximately 10 years it decreases only by ~1% (according to research),
  • Neodymium magnets are remarkably resistant to demagnetization caused by magnetic disturbances,
  • The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to present itself better,
  • They are known for high magnetic induction at the operating surface, which improves attraction properties,
  • 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 designing and the ability to customize to client solutions,
  • Fundamental importance in advanced technology sectors – they are utilized in computer drives, motor assemblies, precision medical tools, also modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in small systems

Limitations

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
  • Neodymium magnets lose power 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 rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited ability of producing threads in the magnet and complex forms - preferred is casing - magnetic holder.
  • Possible danger to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these magnets can be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Maximum lifting force for a neodymium magnet – what it depends on?

The lifting capacity listed is a theoretical maximum value conducted under the following configuration:
  • using a base made of high-permeability steel, acting as a magnetic yoke
  • with a thickness of at least 10 mm
  • with a plane cleaned and smooth
  • under conditions of ideal adhesion (metal-to-metal)
  • during pulling in a direction vertical to the plane
  • at room temperature

What influences lifting capacity in practice

Holding efficiency impacted by specific conditions, such as (from most important):
  • Gap between magnet and steel – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Load vector – highest force is reached only during perpendicular pulling. The shear force of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – too thin steel does not close the flux, causing part of the power to be wasted into the air.
  • Material composition – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which improves force. Uneven metal weaken the grip.
  • Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity was measured by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate reduces the holding force.

H&S for magnets
Material brittleness

Protect your eyes. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Choking Hazard

Absolutely keep magnets away from children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are very dangerous.

Life threat

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

Machining danger

Powder created during cutting of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Do not overheat magnets

Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Hand protection

Protect your hands. Two powerful magnets will snap together immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Electronic hazard

Powerful magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Stay away of min. 10 cm.

Sensitization to coating

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If skin irritation happens, immediately stop working with magnets and use protective gear.

Keep away from electronics

Navigation devices and smartphones are highly susceptible to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Caution required

Handle with care. Neodymium magnets attract from a long distance and connect with massive power, often faster than you can move away.

Safety First! More info about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98