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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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Technical details - 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

Technical modeling of the assembly - data

Presented information represent the direct effect of a engineering analysis. Results rely on algorithms for the material Nd2Fe14B. Real-world performance might slightly differ. Use these data as a reference point during assembly planning.

Table 1: Static force (force 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 pounds
4600.0 g / 45.1 N
warning
1 mm 3688 Gs
368.8 mT
3.27 kg / 7.20 pounds
3265.4 g / 32.0 N
warning
2 mm 2999 Gs
299.9 mT
2.16 kg / 4.76 pounds
2159.7 g / 21.2 N
warning
3 mm 2386 Gs
238.6 mT
1.37 kg / 3.01 pounds
1366.7 g / 13.4 N
weak grip
5 mm 1474 Gs
147.4 mT
0.52 kg / 1.15 pounds
521.4 g / 5.1 N
weak grip
10 mm 489 Gs
48.9 mT
0.06 kg / 0.13 pounds
57.4 g / 0.6 N
weak grip
15 mm 205 Gs
20.5 mT
0.01 kg / 0.02 pounds
10.1 g / 0.1 N
weak grip
20 mm 103 Gs
10.3 mT
0.00 kg / 0.01 pounds
2.5 g / 0.0 N
weak grip
30 mm 36 Gs
3.6 mT
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
weak grip
50 mm 9 Gs
0.9 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

Table 2: Sliding 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 pounds
920.0 g / 9.0 N
1 mm Stal (~0.2) 0.65 kg / 1.44 pounds
654.0 g / 6.4 N
2 mm Stal (~0.2) 0.43 kg / 0.95 pounds
432.0 g / 4.2 N
3 mm Stal (~0.2) 0.27 kg / 0.60 pounds
274.0 g / 2.7 N
5 mm Stal (~0.2) 0.10 kg / 0.23 pounds
104.0 g / 1.0 N
10 mm Stal (~0.2) 0.01 kg / 0.03 pounds
12.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N

Table 3: Vertical assembly (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 pounds
1380.0 g / 13.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.92 kg / 2.03 pounds
920.0 g / 9.0 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.46 kg / 1.01 pounds
460.0 g / 4.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.30 kg / 5.07 pounds
2300.0 g / 22.6 N

Table 4: Material efficiency (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 pounds
460.0 g / 4.5 N
1 mm
25%
1.15 kg / 2.54 pounds
1150.0 g / 11.3 N
2 mm
50%
2.30 kg / 5.07 pounds
2300.0 g / 22.6 N
3 mm
75%
3.45 kg / 7.61 pounds
3450.0 g / 33.8 N
5 mm
100%
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
10 mm
100%
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
11 mm
100%
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N
12 mm
100%
4.60 kg / 10.14 pounds
4600.0 g / 45.1 N

Table 5: Thermal resistance (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 pounds
4600.0 g / 45.1 N
OK
40 °C -2.2% 4.50 kg / 9.92 pounds
4498.8 g / 44.1 N
OK
60 °C -4.4% 4.40 kg / 9.70 pounds
4397.6 g / 43.1 N
80 °C -6.6% 4.30 kg / 9.47 pounds
4296.4 g / 42.1 N
100 °C -28.8% 3.28 kg / 7.22 pounds
3275.2 g / 32.1 N

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

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

Table 7: Safety (HSE) (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
Mechanical watch 20 Gs (2.0 mT) 4.0 cm
Phone / Smartphone 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) - collision effects
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%
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. Shear force

*Caution: On a vertical surface, the magnet holds only a fraction of its nominal pull.

2. Steel saturation

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

3. Heat tolerance

*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) = 0.59

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 and environmental data
Elemental analysis
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
Measurement Calculator
Force (pull)

Field Strength

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The offered product is an incredibly powerful cylinder magnet, produced from modern NdFeB material, which, with dimensions of Ø12x6 mm, guarantees the highest energy density. The MW 12x6 / N38 model boasts an accuracy of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 4.60 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 45.09 N with a weight of only 5.09 g, this rod is indispensable in electronics and wherever every gram matters.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 12.1 mm) using epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance 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 in continuous sale in our store.
This model is characterized by dimensions Ø12x6 mm, which, at a weight of 5.09 g, makes it an element with high 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. 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 diametrically if your project requires it.

Strengths and weaknesses of rare earth magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over nearly 10 years their performance decreases symbolically – ~1% (in testing),
  • Magnets perfectly resist against demagnetization caused by ambient magnetic noise,
  • By applying a reflective layer of nickel, the element has an professional look,
  • Magnets have extremely high magnetic induction on the active area,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
  • Thanks to flexibility in forming and the capacity to customize to client solutions,
  • Versatile presence in future technologies – they serve a role in magnetic memories, electric drive systems, diagnostic systems, as well as technologically advanced constructions.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Limited ability of creating nuts in the magnet and complex shapes - preferred is casing - magnetic holder.
  • Possible danger to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these magnets are able to be problematic in diagnostics medical in case of swallowing.
  • Due to complex production process, their price exceeds standard values,

Pull force analysis

Best holding force of the magnet in ideal parameterswhat contributes to it?

Information about lifting capacity was defined for optimal configuration, taking into account:
  • with the contact of a sheet made of special test steel, ensuring maximum field concentration
  • whose transverse dimension equals approx. 10 mm
  • with an polished touching surface
  • without the slightest insulating layer between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • in stable room temperature

Practical lifting capacity: influencing factors

Real force impacted by specific conditions, mainly (from priority):
  • Distance (betwixt the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
  • Angle of force application – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Metal type – not every steel reacts the same. Alloy additives worsen the attraction effect.
  • Plate texture – ground elements ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
  • Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was measured with the use of a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the holding force is lower. In addition, even a slight gap between the magnet and the plate decreases the holding force.

Safety rules for work with neodymium magnets
Metal Allergy

It is widely known that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, refrain from touching magnets with bare hands and choose encased magnets.

Respect the power

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Magnetic media

Very strong magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.

Physical harm

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

Medical interference

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

GPS Danger

GPS units and smartphones are highly susceptible to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Heat warning

Keep cool. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, look for HT versions (H, SH, UH).

Fire warning

Dust generated during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Protective goggles

Despite the nickel coating, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Swallowing risk

Neodymium magnets are not suitable for play. Swallowing several magnets may result in them pinching intestinal walls, which constitutes a critical condition and necessitates urgent medical intervention.

Attention! More info about hazards in the article: Safety of working with magnets.