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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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Technical - 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

Engineering analysis of the assembly - data

Presented information represent the outcome of a physical calculation. Results rely on models for the material Nd2Fe14B. Real-world performance may differ from theoretical values. Use these calculations as a supplementary guide when designing systems.

Table 1: Static force (pull vs gap) - 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 pounds
740.0 g / 7.3 N
weak grip
1 mm 1782 Gs
178.2 mT
0.50 kg / 1.10 pounds
497.3 g / 4.9 N
weak grip
2 mm 1310 Gs
131.0 mT
0.27 kg / 0.59 pounds
268.7 g / 2.6 N
weak grip
3 mm 914 Gs
91.4 mT
0.13 kg / 0.29 pounds
130.8 g / 1.3 N
weak grip
5 mm 439 Gs
43.9 mT
0.03 kg / 0.07 pounds
30.2 g / 0.3 N
weak grip
10 mm 99 Gs
9.9 mT
0.00 kg / 0.00 pounds
1.5 g / 0.0 N
weak grip
15 mm 35 Gs
3.5 mT
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
weak grip
20 mm 16 Gs
1.6 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
30 mm 5 Gs
0.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

Table 2: Shear 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 pounds
148.0 g / 1.5 N
1 mm Stal (~0.2) 0.10 kg / 0.22 pounds
100.0 g / 1.0 N
2 mm Stal (~0.2) 0.05 kg / 0.12 pounds
54.0 g / 0.5 N
3 mm Stal (~0.2) 0.03 kg / 0.06 pounds
26.0 g / 0.3 N
5 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
10 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 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: Wall mounting (shearing) - behavior on slippery surfaces
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 pounds
222.0 g / 2.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.15 kg / 0.33 pounds
148.0 g / 1.5 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.16 pounds
74.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.37 kg / 0.82 pounds
370.0 g / 3.6 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 8x1.5 / N38

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

Table 5: Thermal resistance (stability) - power drop
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 pounds
740.0 g / 7.3 N
OK
40 °C -2.2% 0.72 kg / 1.60 pounds
723.7 g / 7.1 N
OK
60 °C -4.4% 0.71 kg / 1.56 pounds
707.4 g / 6.9 N
80 °C -6.6% 0.69 kg / 1.52 pounds
691.2 g / 6.8 N
100 °C -28.8% 0.53 kg / 1.16 pounds
526.9 g / 5.2 N

Table 6: Two magnets (repulsion) - field range
MW 8x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.46 kg / 3.23 pounds
3 712 Gs
0.22 kg / 0.48 pounds
220 g / 2.2 N
N/A
1 mm 1.24 kg / 2.74 pounds
4 007 Gs
0.19 kg / 0.41 pounds
187 g / 1.8 N
1.12 kg / 2.47 pounds
~0 Gs
2 mm 0.98 kg / 2.17 pounds
3 565 Gs
0.15 kg / 0.33 pounds
148 g / 1.4 N
0.89 kg / 1.95 pounds
~0 Gs
3 mm 0.74 kg / 1.63 pounds
3 086 Gs
0.11 kg / 0.24 pounds
111 g / 1.1 N
0.66 kg / 1.46 pounds
~0 Gs
5 mm 0.37 kg / 0.82 pounds
2 196 Gs
0.06 kg / 0.12 pounds
56 g / 0.5 N
0.34 kg / 0.74 pounds
~0 Gs
10 mm 0.06 kg / 0.13 pounds
878 Gs
0.01 kg / 0.02 pounds
9 g / 0.1 N
0.05 kg / 0.12 pounds
~0 Gs
20 mm 0.00 kg / 0.01 pounds
199 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
0.00 kg / 0.00 pounds
~0 Gs
50 mm 0.00 kg / 0.00 pounds
17 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
10 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
6 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
4 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
3 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
2 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 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
Car key 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 (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 (Flux)
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: Hydrostatics and buoyancy
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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Shear force

*Caution: On a vertical wall, the magnet holds merely ~20% of its max power.

2. Steel saturation

*Thin metal sheet (e.g. computer case) severely weakens the holding force.

3. Temperature resistance

*For N38 grade, the critical limit is 80°C.

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

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

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 specification and ecology
Chemical composition
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: 010101-2026
Quick Unit Converter
Magnet pull force

Magnetic Induction

Other products

The presented product is an extremely powerful cylindrical magnet, produced from durable NdFeB material, which, with dimensions of Ø8x1.5 mm, guarantees optimal power. The MW 8x1.5 / N38 model boasts high dimensional repeatability and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.74 kg), this product is available off-the-shelf from our European logistics center, 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 perfect for building generators, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 7.27 N with a weight of only 0.57 g, this rod is indispensable in electronics and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are strong enough for 90% of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger 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 warehouse.
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 secures it 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 diametrically if your project requires it.

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • They retain attractive force for almost ten years – the loss is just ~1% (based on simulations),
  • Magnets perfectly resist against loss of magnetization caused by external fields,
  • By covering with a lustrous coating of nickel, the element acquires an proper look,
  • Magnetic induction on the working part of the magnet turns out to be very high,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures approaching 230°C and above...
  • In view of the potential of flexible shaping and customization to custom projects, NdFeB magnets can be modeled in a variety of forms and dimensions, which increases their versatility,
  • Fundamental importance in modern industrial fields – they are utilized in HDD drives, electric drive systems, precision medical tools, and technologically advanced constructions.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Problematic aspects of neodymium magnets and ways of using them
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating threads and complex shapes in magnets, we propose using cover - magnetic mechanism.
  • Health risk resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that small components of these products can disrupt the diagnostic process medical when they are in the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

The declared magnet strength concerns the maximum value, measured under optimal environment, specifically:
  • with the contact of a yoke made of special test steel, guaranteeing full magnetic saturation
  • with a cross-section no less than 10 mm
  • with an ground contact surface
  • with zero gap (no impurities)
  • during pulling in a direction perpendicular to the plane
  • in temp. approx. 20°C

Lifting capacity in practice – influencing factors

In practice, the actual holding force depends on many variables, presented from the most important:
  • Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Angle of force application – highest force is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • 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.
  • Steel grade – ideal substrate is high-permeability steel. Hardened steels may attract less.
  • Surface condition – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
  • Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate reduces the holding force.

Precautions when working with neodymium magnets
Do not overheat magnets

Watch the temperature. Heating the magnet to high heat will ruin its magnetic structure and strength.

Do not drill into magnets

Machining of neodymium magnets poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Physical harm

Large magnets can crush fingers instantly. Never place your hand betwixt two strong magnets.

Danger to pacemakers

People with a pacemaker must keep an absolute distance from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Do not give to children

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

Skin irritation risks

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If skin irritation appears, cease handling magnets and use protective gear.

Phone sensors

An intense magnetic field negatively affects the operation of magnetometers in phones and GPS navigation. Keep magnets near a smartphone to avoid damaging the sensors.

Cards and drives

Very strong magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Stay away of min. 10 cm.

Protective goggles

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Collision of two magnets will cause them cracking into shards.

Caution required

Be careful. Neodymium magnets attract from a distance and snap with huge force, often faster than you can move away.

Warning! Details about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98