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neodymium magnets

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MW 6x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010094

GTIN: 5906301810933

5.00

Diameter Ø

6 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

1.27 g

Magnetization Direction

↑ axial

Load capacity

1.14 kg / 11.18 N

Magnetic Induction

553.38 mT / 5534 Gs

Coating

[NiCuNi] Nickel

0.677 with VAT / pcs + price for transport

0.550 ZŁ net + 23% VAT / pcs

bulk discounts:

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MW 6x6 / N38 - cylindrical magnet

Specification / characteristics MW 6x6 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010094
GTIN 5906301810933
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 6 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 1.27 g
Magnetization Direction ↑ axial
Load capacity ~ ? 1.14 kg / 11.18 N
Magnetic Induction ~ ? 553.38 mT / 5534 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 6x6 / N38 - cylindrical magnet
properties values units
remenance Br [Min. - Max.] ? 12.2-12.6 kGs
remenance Br [Min. - Max.] ? 1220-1260 T
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 106 °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 - technical parameters

Presented data represent the direct effect of a physical calculation. Values were calculated on algorithms for the class NdFeB. Actual performance may deviate from the simulation results. Please consider these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs gap) - characteristics
MW 6x6 / N38
Distance (mm) Induction (Gauss) / mT Pull Force (kg) Risk Status
0 mm 5527 Gs
552.7 mT
1.14 kg / 1140.0 g
11.2 N
weak grip
1 mm 3738 Gs
373.8 mT
0.52 kg / 521.5 g
5.1 N
weak grip
2 mm 2366 Gs
236.6 mT
0.21 kg / 209.0 g
2.0 N
weak grip
3 mm 1498 Gs
149.8 mT
0.08 kg / 83.7 g
0.8 N
weak grip
5 mm 665 Gs
66.5 mT
0.02 kg / 16.5 g
0.2 N
weak grip
10 mm 155 Gs
15.5 mT
0.00 kg / 0.9 g
0.0 N
weak grip
15 mm 58 Gs
5.8 mT
0.00 kg / 0.1 g
0.0 N
weak grip
20 mm 28 Gs
2.8 mT
0.00 kg / 0.0 g
0.0 N
weak grip
30 mm 9 Gs
0.9 mT
0.00 kg / 0.0 g
0.0 N
weak grip
50 mm 2 Gs
0.2 mT
0.00 kg / 0.0 g
0.0 N
weak grip
Table 2: Shear Capacity (Vertical Surface)
MW 6x6 / N38
Distance (mm) Friction coefficient Pull Force (kg)
0 mm Stal (~0.2) 0.23 kg / 228.0 g
2.2 N
1 mm Stal (~0.2) 0.10 kg / 104.0 g
1.0 N
2 mm Stal (~0.2) 0.04 kg / 42.0 g
0.4 N
3 mm Stal (~0.2) 0.02 kg / 16.0 g
0.2 N
5 mm Stal (~0.2) 0.00 kg / 4.0 g
0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.0 g
0.0 N
Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 6x6 / N38
Surface type Friction coefficient / % Mocy Max load (kg)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.34 kg / 342.0 g
3.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.23 kg / 228.0 g
2.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.11 kg / 114.0 g
1.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.57 kg / 570.0 g
5.6 N
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 6x6 / N38
Steel thickness (mm) % power Real pull force (kg)
0.5 mm
10%
0.11 kg / 114.0 g
1.1 N
1 mm
25%
0.29 kg / 285.0 g
2.8 N
2 mm
50%
0.57 kg / 570.0 g
5.6 N
5 mm
100%
1.14 kg / 1140.0 g
11.2 N
10 mm
100%
1.14 kg / 1140.0 g
11.2 N
Table 5: Thermal stability (stability) - resistance threshold
MW 6x6 / N38
Ambient temp. (°C) Power loss Remaining pull Status
20 °C 0.0% 1.14 kg / 1140.0 g
11.2 N
OK
40 °C -2.2% 1.11 kg / 1114.9 g
10.9 N
OK
60 °C -4.4% 1.09 kg / 1089.8 g
10.7 N
OK
80 °C -6.6% 1.06 kg / 1064.8 g
10.4 N
100 °C -28.8% 0.81 kg / 811.7 g
8.0 N
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 6x6 / N38
Gap (mm) Attraction (kg) (N-S) Repulsion (kg) (N-N)
0 mm 1.15 kg / 1148 g
11.3 N
11 091 Gs
N/A
1 mm 0.52 kg / 522 g
5.1 N
9 220 Gs
0.47 kg / 469 g
4.6 N
~0 Gs
2 mm 0.21 kg / 209 g
2.0 N
7 476 Gs
0.19 kg / 188 g
1.8 N
~0 Gs
3 mm 0.08 kg / 84 g
0.8 N
5 968 Gs
0.08 kg / 75 g
0.7 N
~0 Gs
5 mm 0.02 kg / 17 g
0.2 N
3 755 Gs
0.01 kg / 15 g
0.1 N
~0 Gs
10 mm 0.00 kg / 1 g
0.0 N
1 330 Gs
0.00 kg / 0 g
0.0 N
~0 Gs
20 mm 0.00 kg / 0 g
0.0 N
311 Gs
0.00 kg / 0 g
0.0 N
~0 Gs
50 mm 0.00 kg / 0 g
0.0 N
31 Gs
0.00 kg / 0 g
0.0 N
~0 Gs
Table 7: Hazards (electronics) - warnings
MW 6x6 / N38
Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 4.0 cm
Hearing aid 10 Gs (1.0 mT) 3.0 cm
Timepiece 20 Gs (2.0 mT) 2.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.0 cm
Remote 50 Gs (5.0 mT) 2.0 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Table 8: Dynamics (cracking risk) - warning
MW 6x6 / N38
Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 30.23 km/h
(8.40 m/s)
0.04 J
30 mm 52.34 km/h
(14.54 m/s)
0.13 J
50 mm 67.56 km/h
(18.77 m/s)
0.22 J
100 mm 95.55 km/h
(26.54 m/s)
0.45 J
Table 9: Anti-corrosion coating durability
MW 6x6 / 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: Generator data (Flux)
MW 6x6 / N38
Parameter Value Jedn. SI / Opis
Strumień (Flux) 1 613 Mx 16.1 µWb
Współczynnik Pc 0.89 Wysoki (Stabilny)
Table 11: Physics of underwater searching
MW 6x6 / N38
Environment Effective steel pull Effect
Air (land) 1.14 kg Standard
Water (riverbed) 1.31 kg
(+0.17 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.
Magnet Unit Converter
Force (Pull)

Field Strength

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This product is an extremely powerful cylindrical magnet, produced from advanced NdFeB material, which, with dimensions of Ø6x6 mm, guarantees the highest energy density. The MW 6x6 / N38 component features high dimensional repeatability and professional build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 1.14 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is created for building generators, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 11.18 N with a weight of only 1.27 g, this rod is indispensable in electronics 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., 6.1 mm) using epoxy glues. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable for the majority of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø6x6), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 6 mm and height 6 mm. The key parameter here is the lifting capacity amounting to approximately 1.14 kg (force ~11.18 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 oxidation, 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 6 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.

Advantages and disadvantages of rare earth magnets.

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

  • They do not lose magnetism, even after around ten years – the reduction in lifting capacity is only ~1% (theoretically),
  • Magnets perfectly protect themselves against loss of magnetization caused by foreign field sources,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnetic induction on the working layer of the magnet is strong,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Possibility of exact forming and adapting to concrete applications,
  • Fundamental importance in modern industrial fields – they are used in magnetic memories, motor assemblies, medical devices, and complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in miniature devices

Disadvantages of neodymium magnets:

  • At very strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We suggest cover - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated shapes.
  • Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can complicate diagnosis medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Maximum lifting force for a neodymium magnet – what affects it?

The force parameter is a measurement result conducted under the following configuration:

  • on a block made of structural steel, effectively closing the magnetic field
  • with a thickness no less than 10 mm
  • with a plane free of scratches
  • with zero gap (without paint)
  • during detachment in a direction vertical to the plane
  • in stable room temperature

Determinants of practical lifting force of a magnet

Effective lifting capacity is affected by working environment parameters, such as (from priority):

  • Distance (betwixt the magnet and the metal), as even a tiny clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
  • Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Chemical composition of the base – mild steel attracts best. Higher carbon content decrease magnetic properties and holding force.
  • Surface finish – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Temperature influence – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

* Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the lifting capacity is smaller. Additionally, even a small distance {between} the magnet and the plate lowers the lifting capacity.

H&S for magnets

Magnet fragility

Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Fire warning

Dust produced during machining of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Threat to electronics

Intense magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.

Pacemakers

Individuals with a heart stimulator must keep an large gap from magnets. The magnetism can disrupt the functioning of the implant.

Power loss in heat

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

Warning for allergy sufferers

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If redness occurs, cease working with magnets and use protective gear.

Finger safety

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

Handling guide

Exercise caution. Rare earth magnets attract from a long distance and connect with massive power, often quicker than you can react.

Choking Hazard

Adult use only. Small elements can be swallowed, causing severe trauma. Keep away from kids and pets.

Phone sensors

Note: rare earth magnets produce a field that confuses precision electronics. Keep a separation from your mobile, device, and GPS.

Important!

Want to know more? Check our post: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98