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neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our proposal. Practically all magnesy neodymowe on our website are in stock for immediate delivery (check the list). See the magnet pricing for more details see the magnet price list

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MW 8x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010101

GTIN: 5906301811008

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

0.57 g

Magnetization Direction

↑ axial

Load capacity

0.74 kg / 7.27 N

Magnetic Induction

217.52 mT / 2175 Gs

Coating

[NiCuNi] Nickel

0.455 with VAT / pcs + price for transport

0.370 ZŁ net + 23% VAT / pcs

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MW 8x1.5 / N38 - cylindrical magnet

Specification / characteristics MW 8x1.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010101
GTIN 5906301811008
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 8 mm [±0,1 mm]
Height 1.5 mm [±0,1 mm]
Weight 0.57 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.74 kg / 7.27 N
Magnetic Induction ~ ? 217.52 mT / 2175 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x1.5 / 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 information are the direct effect of a physical simulation. Results rely on algorithms for the class NdFeB. Actual performance might slightly differ. Use these calculations as a reference point when designing systems.

Table 1: Static pull force (pull vs gap) - characteristics
MW 8x1.5 / N38
Distance (mm) Induction (Gauss) / mT Pull Force (kg) Risk Status
0 mm 2174 Gs
217.4 mT
0.74 kg / 740.0 g
7.3 N
weak grip
1 mm 1782 Gs
178.2 mT
0.50 kg / 497.3 g
4.9 N
weak grip
2 mm 1310 Gs
131.0 mT
0.27 kg / 268.7 g
2.6 N
weak grip
3 mm 914 Gs
91.4 mT
0.13 kg / 130.8 g
1.3 N
weak grip
5 mm 439 Gs
43.9 mT
0.03 kg / 30.2 g
0.3 N
weak grip
10 mm 99 Gs
9.9 mT
0.00 kg / 1.5 g
0.0 N
weak grip
15 mm 35 Gs
3.5 mT
0.00 kg / 0.2 g
0.0 N
weak grip
20 mm 16 Gs
1.6 mT
0.00 kg / 0.0 g
0.0 N
weak grip
30 mm 5 Gs
0.5 mT
0.00 kg / 0.0 g
0.0 N
weak grip
50 mm 1 Gs
0.1 mT
0.00 kg / 0.0 g
0.0 N
weak grip
Table 2: Shear Capacity (Vertical Surface)
MW 8x1.5 / N38
Distance (mm) Friction coefficient Pull Force (kg)
0 mm Stal (~0.2) 0.15 kg / 148.0 g
1.5 N
1 mm Stal (~0.2) 0.10 kg / 100.0 g
1.0 N
2 mm Stal (~0.2) 0.05 kg / 54.0 g
0.5 N
3 mm Stal (~0.2) 0.03 kg / 26.0 g
0.3 N
5 mm Stal (~0.2) 0.01 kg / 6.0 g
0.1 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 (shearing) - vertical pull
MW 8x1.5 / N38
Surface type Friction coefficient / % Mocy Max load (kg)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.22 kg / 222.0 g
2.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.15 kg / 148.0 g
1.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 74.0 g
0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.37 kg / 370.0 g
3.6 N
Table 4: Steel thickness (saturation) - sheet metal selection
MW 8x1.5 / N38
Steel thickness (mm) % power Real pull force (kg)
0.5 mm
10%
0.07 kg / 74.0 g
0.7 N
1 mm
25%
0.19 kg / 185.0 g
1.8 N
2 mm
50%
0.37 kg / 370.0 g
3.6 N
5 mm
100%
0.74 kg / 740.0 g
7.3 N
10 mm
100%
0.74 kg / 740.0 g
7.3 N
Table 5: Working in heat (stability) - thermal limit
MW 8x1.5 / N38
Ambient temp. (°C) Power loss Remaining pull Status
20 °C 0.0% 0.74 kg / 740.0 g
7.3 N
OK
40 °C -2.2% 0.72 kg / 723.7 g
7.1 N
OK
60 °C -4.4% 0.71 kg / 707.4 g
6.9 N
OK
80 °C -6.6% 0.69 kg / 691.2 g
6.8 N
100 °C -28.8% 0.53 kg / 526.9 g
5.2 N
Table 6: Two magnets (repulsion) - forces in the system
MW 8x1.5 / N38
Gap (mm) Attraction (kg) (N-S) Repulsion (kg) (N-N)
0 mm 1.11 kg / 1110.0 g
10.9 N
N/A
2 mm 0.41 kg / 405.0 g
4.0 N
0.38 kg / 378.0 g
3.7 N
5 mm 0.05 kg / 45.0 g
0.4 N
0.04 kg / 42.0 g
0.4 N
10 mm 0.00 kg / 0.0 g
0.0 N
0.00 kg / 0.0 g
0.0 N
20 mm 0.00 kg / 0.0 g
0.0 N
0.00 kg / 0.0 g
0.0 N
50 mm 0.00 kg / 0.0 g
0.0 N
0.00 kg / 0.0 g
0.0 N
Table 7: Safety (HSE) (electronics) - precautionary measures
MW 8x1.5 / N38
Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.0 cm
Hearing aid 10 Gs (1.0 mT) 2.5 cm
Mechanical watch 20 Gs (2.0 mT) 2.0 cm
Mobile device 40 Gs (4.0 mT) 1.5 cm
Remote 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
Table 8: Dynamics (cracking risk) - warning
MW 8x1.5 / N38
Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 36.39 km/h
(10.11 m/s)
0.03 J
30 mm 62.94 km/h
(17.48 m/s)
0.09 J
50 mm 81.25 km/h
(22.57 m/s)
0.15 J
100 mm 114.91 km/h
(31.92 m/s)
0.29 J
Table 9: Surface protection spec
MW 8x1.5 / 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: Underwater work (magnet fishing)
MW 8x1.5 / N38
Environment Effective steel pull Effect
Air (land) 0.74 kg Standard
Water (riverbed) 0.85 kg
(+0.11 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!

See more proposals

This product is an exceptionally strong cylinder magnet, made from modern NdFeB material, which, with dimensions of Ø8x1.5 mm, guarantees optimal power. The MW 8x1.5 / N38 component boasts high dimensional repeatability and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 0.74 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 7.27 N with a weight of only 0.57 g, this rod is indispensable in electronics and wherever every gram matters.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in automation, 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 industrial neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø8x1.5), 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 8 mm and height 1.5 mm. The key parameter here is the lifting capacity amounting to approximately 0.74 kg (force ~7.27 N), which, with such compact dimensions, proves the high grade 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 8 mm. Such an arrangement is standard 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 through the diameter if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:

  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (in laboratory conditions),
  • They possess excellent resistance to magnetism drop when exposed to external magnetic sources,
  • By applying a shiny layer of nickel, the element acquires an nice look,
  • Magnets exhibit impressive magnetic induction on the surface,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of detailed creating and modifying to specific conditions,
  • Wide application in future technologies – they are commonly used in magnetic memories, electromotive mechanisms, diagnostic systems, also multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Drawbacks and weaknesses of neodymium magnets: application proposals

  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in power. 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • We suggest cover - magnetic mount, due to difficulties in creating threads inside the magnet and complicated shapes.
  • Possible danger resulting from small fragments of magnets are risky, if swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these magnets can disrupt the diagnostic process medical after entering 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

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

The lifting capacity listed is a result of laboratory testing performed under specific, ideal conditions:

  • using a sheet made of high-permeability steel, serving as a ideal flux conductor
  • possessing a thickness of min. 10 mm to avoid saturation
  • with a plane cleaned and smooth
  • without any clearance between the magnet and steel
  • under vertical force direction (90-degree angle)
  • at conditions approx. 20°C

Key elements affecting lifting force

During everyday use, the actual holding force results from several key aspects, presented from the most important:

  • Distance – the presence of foreign body (rust, dirt, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick steel does not accept the full field, causing part of the power to be wasted into the air.
  • Metal type – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

* Lifting capacity was measured by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a small distance {between} the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with neodymium magnets

Do not drill into magnets

Fire warning: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

Power loss in heat

Monitor thermal conditions. Heating the magnet to high heat will ruin its magnetic structure and pulling force.

Life threat

Patients with a ICD should keep an large gap from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Magnet fragility

Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Immense force

Use magnets consciously. Their powerful strength can surprise even professionals. Be vigilant and respect their power.

Swallowing risk

Strictly keep magnets out of reach of children. Choking hazard is high, and the consequences of magnets clamping inside the body are tragic.

Crushing risk

Large magnets can crush fingers instantly. Do not place your hand between two attracting surfaces.

GPS Danger

Be aware: neodymium magnets produce a field that confuses precision electronics. Keep a separation from your phone, device, and GPS.

Protect data

Powerful magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Allergy Warning

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, avoid touching magnets with bare hands and choose versions in plastic housing.

Attention!

Looking for details? Check our post: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98