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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 - 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 analysis of the product - data

These information are the result of a physical analysis. Results were calculated on algorithms for the material Nd2Fe14B. Actual conditions may differ from theoretical values. Treat these data as a preliminary roadmap when designing systems.

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

Table 2: Shear force (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: 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 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) - 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: Working in heat (stability) - power drop
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 collision
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 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 (electronics) - 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
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: 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: Anti-corrosion coating 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 (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: 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%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Note: On a vertical surface, the magnet holds merely a fraction of its max power.

2. Steel saturation

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

3. Power loss vs temp

*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

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: 010021-2026
Magnet Unit Converter
Magnet pull force

Magnetic Induction

Other products

This product is an incredibly powerful cylindrical magnet, produced from durable NdFeB material, which, with dimensions of Ø12x6 mm, guarantees maximum efficiency. The MW 12x6 / N38 component boasts an accuracy of ±0.1mm and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 4.60 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a positioning 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 miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 12.1 mm) using epoxy glues. To ensure stability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for 90% of applications in automation and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger 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 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 key parameter here is the holding force amounting to approximately 4.60 kg (force ~45.09 N), which, with such compact dimensions, proves the high power of the NdFeB material. 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 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.

Advantages as well as disadvantages of neodymium magnets.

Pros

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • Their magnetic field remains stable, and after approximately 10 years it decreases only by ~1% (according to research),
  • They do not lose their magnetic properties even under strong external field,
  • In other words, due to the metallic finish of silver, the element looks attractive,
  • Neodymium magnets ensure maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • Thanks to versatility in constructing and the ability to customize to individual projects,
  • Huge importance in high-tech industry – they serve a role in mass storage devices, brushless drives, advanced medical instruments, also industrial machines.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
  • We suggest a housing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated forms.
  • Health risk related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these devices can be problematic in diagnostics medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum lifting capacity of the magnetwhat it depends on?

The load parameter shown concerns the limit force, obtained under laboratory conditions, meaning:
  • with the use of a sheet made of low-carbon steel, ensuring full magnetic saturation
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • with an polished contact surface
  • without the slightest insulating layer between the magnet and steel
  • during pulling in a direction vertical to the plane
  • at temperature room level

Key elements affecting lifting force

During everyday use, the actual holding force is determined by a number of factors, presented from crucial:
  • Distance – the presence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Base massiveness – too thin steel does not close the flux, causing part of the flux to be wasted into the air.
  • Material type – the best choice is high-permeability steel. Hardened steels may generate lower lifting capacity.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
  • Temperature – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.

Lifting capacity was determined with the use of a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet and the plate decreases the load capacity.

Warnings
Thermal limits

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

Safe distance

Powerful magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.

Magnets are brittle

Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Medical interference

Patients with a pacemaker should keep an safe separation from magnets. The magnetic field can disrupt the functioning of the implant.

Dust explosion hazard

Fire hazard: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.

Crushing force

Pinching hazard: The pulling power is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.

GPS and phone interference

A strong magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Maintain magnets near a smartphone to prevent damaging the sensors.

Skin irritation risks

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness happens, immediately stop handling magnets and wear gloves.

Adults only

These products are not intended for children. Swallowing multiple magnets may result in them attracting across intestines, which constitutes a severe health hazard and requires urgent medical intervention.

Do not underestimate power

Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

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