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MW 8x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010101

GTIN/EAN: 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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Physical properties - MW 8x1.5 / N38 - cylindrical magnet

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

properties
properties values
Cat. no. 010101
GTIN/EAN 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 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 simulation of the assembly - report

The following information are the result of a engineering calculation. Values were calculated on models for the material Nd2Fe14B. Real-world conditions might slightly differ. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs distance) - interaction chart
MW 8x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2174 Gs
217.4 mT
0.74 kg / 1.63 lbs
740.0 g / 7.3 N
weak grip
1 mm 1782 Gs
178.2 mT
0.50 kg / 1.10 lbs
497.3 g / 4.9 N
weak grip
2 mm 1310 Gs
131.0 mT
0.27 kg / 0.59 lbs
268.7 g / 2.6 N
weak grip
3 mm 914 Gs
91.4 mT
0.13 kg / 0.29 lbs
130.8 g / 1.3 N
weak grip
5 mm 439 Gs
43.9 mT
0.03 kg / 0.07 lbs
30.2 g / 0.3 N
weak grip
10 mm 99 Gs
9.9 mT
0.00 kg / 0.00 lbs
1.5 g / 0.0 N
weak grip
15 mm 35 Gs
3.5 mT
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
weak grip
20 mm 16 Gs
1.6 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
30 mm 5 Gs
0.5 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip

Table 2: Slippage load (vertical surface)
MW 8x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.15 kg / 0.33 lbs
148.0 g / 1.5 N
1 mm Stal (~0.2) 0.10 kg / 0.22 lbs
100.0 g / 1.0 N
2 mm Stal (~0.2) 0.05 kg / 0.12 lbs
54.0 g / 0.5 N
3 mm Stal (~0.2) 0.03 kg / 0.06 lbs
26.0 g / 0.3 N
5 mm Stal (~0.2) 0.01 kg / 0.01 lbs
6.0 g / 0.1 N
10 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 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) - vertical pull
MW 8x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.22 kg / 0.49 lbs
222.0 g / 2.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.15 kg / 0.33 lbs
148.0 g / 1.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.16 lbs
74.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.37 kg / 0.82 lbs
370.0 g / 3.6 N

Table 4: Steel thickness (substrate influence) - power losses
MW 8x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.07 kg / 0.16 lbs
74.0 g / 0.7 N
1 mm
25%
0.19 kg / 0.41 lbs
185.0 g / 1.8 N
2 mm
50%
0.37 kg / 0.82 lbs
370.0 g / 3.6 N
3 mm
75%
0.55 kg / 1.22 lbs
555.0 g / 5.4 N
5 mm
100%
0.74 kg / 1.63 lbs
740.0 g / 7.3 N
10 mm
100%
0.74 kg / 1.63 lbs
740.0 g / 7.3 N
11 mm
100%
0.74 kg / 1.63 lbs
740.0 g / 7.3 N
12 mm
100%
0.74 kg / 1.63 lbs
740.0 g / 7.3 N

Table 5: Thermal stability (stability) - resistance threshold
MW 8x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.74 kg / 1.63 lbs
740.0 g / 7.3 N
OK
40 °C -2.2% 0.72 kg / 1.60 lbs
723.7 g / 7.1 N
OK
60 °C -4.4% 0.71 kg / 1.56 lbs
707.4 g / 6.9 N
80 °C -6.6% 0.69 kg / 1.52 lbs
691.2 g / 6.8 N
100 °C -28.8% 0.53 kg / 1.16 lbs
526.9 g / 5.2 N

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 8x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.46 kg / 3.23 lbs
3 712 Gs
0.22 kg / 0.48 lbs
220 g / 2.2 N
N/A
1 mm 1.24 kg / 2.74 lbs
4 007 Gs
0.19 kg / 0.41 lbs
187 g / 1.8 N
1.12 kg / 2.47 lbs
~0 Gs
2 mm 0.98 kg / 2.17 lbs
3 565 Gs
0.15 kg / 0.33 lbs
148 g / 1.4 N
0.89 kg / 1.95 lbs
~0 Gs
3 mm 0.74 kg / 1.63 lbs
3 086 Gs
0.11 kg / 0.24 lbs
111 g / 1.1 N
0.66 kg / 1.46 lbs
~0 Gs
5 mm 0.37 kg / 0.82 lbs
2 196 Gs
0.06 kg / 0.12 lbs
56 g / 0.5 N
0.34 kg / 0.74 lbs
~0 Gs
10 mm 0.06 kg / 0.13 lbs
878 Gs
0.01 kg / 0.02 lbs
9 g / 0.1 N
0.05 kg / 0.12 lbs
~0 Gs
20 mm 0.00 kg / 0.01 lbs
199 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs
50 mm 0.00 kg / 0.00 lbs
17 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
10 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
6 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
4 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
3 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
2 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
0.00 kg / 0.00 lbs
~0 Gs

Table 7: Protective zones (electronics) - warnings
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
Timepiece 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: Collisions (kinetic energy) - collision effects
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: Corrosion resistance
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: Electrical data (Pc)
MW 8x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 285 Mx 12.9 µWb
Pc Coefficient 0.27 Low (Flat)

Table 11: Physics of underwater searching
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%
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. Vertical hold

*Note: On a vertical surface, the magnet retains merely approx. 20-30% of its perpendicular strength.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.

3. Power loss vs temp

*For N38 grade, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.27

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 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: 010101-2026
Measurement Calculator
Pulling force

Magnetic Induction

Other offers

The presented product is an extremely powerful cylindrical magnet, manufactured from modern NdFeB material, which, at dimensions of Ø8x1.5 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.74 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building generators, advanced sensors, and efficient filters, where maximum induction 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.
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., 8.1 mm) using two-component epoxy glues. To ensure stability in industry, 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 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 (Ø8x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 8 mm and height 1.5 mm. The value of 7.27 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.57 g. The product has a [NiCuNi] coating, which protects the surface against external factors, 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. 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.

Pros as well as cons of Nd2Fe14B magnets.

Benefits

Besides their exceptional strength, neodymium magnets offer the following advantages:
  • They do not lose power, even after nearly 10 years – the reduction in lifting capacity is only ~1% (theoretically),
  • They retain their magnetic properties even under close interference source,
  • By applying a lustrous coating of nickel, the element gains an aesthetic look,
  • Magnetic induction on the working part of the magnet turns out to be very high,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to flexibility in forming and the capacity to customize to specific needs,
  • Significant place in modern technologies – they serve a role in data components, electric motors, precision medical tools, and multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and 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. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in realizing nuts and complicated forms in magnets, we propose using a housing - magnetic mechanism.
  • Health risk to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Furthermore, small components of these devices are able to be problematic in diagnostics medical after entering the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Holding force characteristics

Magnetic strength at its maximum – what contributes to it?

The declared magnet strength refers to the peak performance, recorded under optimal environment, meaning:
  • with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • with a cross-section of at least 10 mm
  • with an ground touching surface
  • with zero gap (without impurities)
  • for force applied at a right angle (pull-off, not shear)
  • at room temperature

Determinants of practical lifting force of a magnet

During everyday use, the real power results from a number of factors, presented from the most important:
  • Distance (betwixt the magnet and the metal), since even a very small distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
  • Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the surface is typically 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 escaped to the other side.
  • Material composition – different alloys attracts identically. High carbon content worsen the interaction with the magnet.
  • Base smoothness – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets
Warning for allergy sufferers

Studies show that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, refrain from touching magnets with bare hands or select encased magnets.

Phone sensors

Remember: neodymium magnets generate a field that disrupts sensitive sensors. Maintain a safe distance from your phone, tablet, and GPS.

Magnet fragility

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Medical implants

Patients with a heart stimulator have to keep an large gap from magnets. The magnetism can disrupt the operation of the implant.

Respect the power

Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Heat sensitivity

Do not overheat. NdFeB magnets are sensitive to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).

This is not a toy

Only for adults. Small elements can be swallowed, leading to intestinal necrosis. Store out of reach of kids and pets.

Bodily injuries

Pinching hazard: The pulling power is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Dust explosion hazard

Powder created during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Cards and drives

Avoid bringing magnets close to a purse, computer, or screen. The magnetism can irreversibly ruin these devices and wipe information from cards.

Attention! Learn more about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98