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MW 7x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010393

GTIN/EAN: 5906301811091

5.00

Diameter Ø

7 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

0.43 g

Magnetization Direction

↑ axial

Load capacity

0.69 kg / 6.75 N

Magnetic Induction

243.98 mT / 2440 Gs

Coating

[NiCuNi] Nickel

0.369 with VAT / pcs + price for transport

0.300 ZŁ net + 23% VAT / pcs

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Lifting power along with shape of a neodymium magnet can be checked on our power calculator.

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Technical specification - MW 7x1.5 / N38 - cylindrical magnet

Specification / characteristics - MW 7x1.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010393
GTIN/EAN 5906301811091
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 7 mm [±0,1 mm]
Height 1.5 mm [±0,1 mm]
Weight 0.43 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.69 kg / 6.75 N
Magnetic Induction ~ ? 243.98 mT / 2440 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 7x1.5 / 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

Physical simulation of the magnet - data

These values constitute the direct effect of a physical analysis. Results are based on algorithms for the material Nd2Fe14B. Real-world parameters might slightly deviate from the simulation results. Use these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs distance) - power drop
MW 7x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2438 Gs
243.8 mT
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
low risk
1 mm 1900 Gs
190.0 mT
0.42 kg / 0.92 LBS
419.1 g / 4.1 N
low risk
2 mm 1308 Gs
130.8 mT
0.20 kg / 0.44 LBS
198.6 g / 1.9 N
low risk
3 mm 859 Gs
85.9 mT
0.09 kg / 0.19 LBS
85.7 g / 0.8 N
low risk
5 mm 380 Gs
38.0 mT
0.02 kg / 0.04 LBS
16.7 g / 0.2 N
low risk
10 mm 79 Gs
7.9 mT
0.00 kg / 0.00 LBS
0.7 g / 0.0 N
low risk
15 mm 27 Gs
2.7 mT
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
low risk
20 mm 12 Gs
1.2 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
low risk
30 mm 4 Gs
0.4 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
low risk
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
low risk

Table 2: Slippage capacity (wall)
MW 7x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.14 kg / 0.30 LBS
138.0 g / 1.4 N
1 mm Stal (~0.2) 0.08 kg / 0.19 LBS
84.0 g / 0.8 N
2 mm Stal (~0.2) 0.04 kg / 0.09 LBS
40.0 g / 0.4 N
3 mm Stal (~0.2) 0.02 kg / 0.04 LBS
18.0 g / 0.2 N
5 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 g / 0.0 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: Vertical assembly (sliding) - behavior on slippery surfaces
MW 7x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.21 kg / 0.46 LBS
207.0 g / 2.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.14 kg / 0.30 LBS
138.0 g / 1.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.15 LBS
69.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.35 kg / 0.76 LBS
345.0 g / 3.4 N

Table 4: Steel thickness (saturation) - power losses
MW 7x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.07 kg / 0.15 LBS
69.0 g / 0.7 N
1 mm
25%
0.17 kg / 0.38 LBS
172.5 g / 1.7 N
2 mm
50%
0.35 kg / 0.76 LBS
345.0 g / 3.4 N
3 mm
75%
0.52 kg / 1.14 LBS
517.5 g / 5.1 N
5 mm
100%
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
10 mm
100%
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
11 mm
100%
0.69 kg / 1.52 LBS
690.0 g / 6.8 N
12 mm
100%
0.69 kg / 1.52 LBS
690.0 g / 6.8 N

Table 5: Thermal stability (stability) - thermal limit
MW 7x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.69 kg / 1.52 LBS
690.0 g / 6.8 N
OK
40 °C -2.2% 0.67 kg / 1.49 LBS
674.8 g / 6.6 N
OK
60 °C -4.4% 0.66 kg / 1.45 LBS
659.6 g / 6.5 N
80 °C -6.6% 0.64 kg / 1.42 LBS
644.5 g / 6.3 N
100 °C -28.8% 0.49 kg / 1.08 LBS
491.3 g / 4.8 N

Table 6: Two magnets (repulsion) - field collision
MW 7x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.41 kg / 3.11 LBS
4 025 Gs
0.21 kg / 0.47 LBS
212 g / 2.1 N
N/A
1 mm 1.15 kg / 2.53 LBS
4 398 Gs
0.17 kg / 0.38 LBS
172 g / 1.7 N
1.03 kg / 2.28 LBS
~0 Gs
2 mm 0.86 kg / 1.89 LBS
3 801 Gs
0.13 kg / 0.28 LBS
129 g / 1.3 N
0.77 kg / 1.70 LBS
~0 Gs
3 mm 0.60 kg / 1.33 LBS
3 185 Gs
0.09 kg / 0.20 LBS
90 g / 0.9 N
0.54 kg / 1.19 LBS
~0 Gs
5 mm 0.27 kg / 0.59 LBS
2 125 Gs
0.04 kg / 0.09 LBS
40 g / 0.4 N
0.24 kg / 0.53 LBS
~0 Gs
10 mm 0.03 kg / 0.08 LBS
759 Gs
0.01 kg / 0.01 LBS
5 g / 0.1 N
0.03 kg / 0.07 LBS
~0 Gs
20 mm 0.00 kg / 0.00 LBS
159 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
13 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
8 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
5 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
3 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
2 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: Safety (HSE) (electronics) - precautionary measures
MW 7x1.5 / 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
Phone / Smartphone 40 Gs (4.0 mT) 1.5 cm
Remote 50 Gs (5.0 mT) 1.5 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm

Table 8: Impact energy (kinetic energy) - warning
MW 7x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 40.43 km/h
(11.23 m/s)
0.03 J
30 mm 69.97 km/h
(19.44 m/s)
0.08 J
50 mm 90.34 km/h
(25.09 m/s)
0.14 J
100 mm 127.75 km/h
(35.49 m/s)
0.27 J

Table 9: Corrosion resistance
MW 7x1.5 / 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 7x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 075 Mx 10.8 µWb
Pc Coefficient 0.31 Low (Flat)

Table 11: Hydrostatics and buoyancy
MW 7x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.69 kg Standard
Water (riverbed) 0.79 kg
(+0.10 kg buoyancy gain)
+14.5%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Sliding resistance

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

2. Steel saturation

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

3. Thermal stability

*For N38 material, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.31

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%
Environmental data
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: 010393-2026
Quick Unit Converter
Magnet pull force

Field Strength

Other deals

The offered product is a very strong cylindrical magnet, produced from modern NdFeB material, which, with dimensions of Ø7x1.5 mm, guarantees the highest energy density. The MW 7x1.5 / N38 model features a tolerance of ±0.1mm and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.69 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Moreover, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
This model is created for building generators, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 6.75 N with a weight of only 0.43 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 7.1 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 high repeatability of the connection.
Magnets N38 are strong enough for the majority of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø7x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
This model is characterized by dimensions Ø7x1.5 mm, which, at a weight of 0.43 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 0.69 kg (force ~6.75 N), which, with such defined 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.
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 7 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.

Pros and cons of neodymium magnets.

Pros

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • Their power is maintained, and after around ten years it decreases only by ~1% (theoretically),
  • They are extremely resistant to demagnetization induced by external field influence,
  • A magnet with a metallic nickel surface has better aesthetics,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of precise modeling as well as modifying to individual applications,
  • Universal use in high-tech industry – they serve a role in data components, motor assemblies, medical devices, also multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We suggest cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated forms.
  • Health risk to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these magnets can disrupt the diagnostic process medical when they are in the body.
  • With budget limitations the cost of neodymium magnets is a challenge,

Lifting parameters

Maximum lifting capacity of the magnetwhat affects it?

Breakaway force was defined for optimal configuration, including:
  • using a base made of mild steel, acting as a magnetic yoke
  • with a thickness of at least 10 mm
  • with an polished contact surface
  • without any insulating layer between the magnet and steel
  • for force acting at a right angle (in the magnet axis)
  • in stable room temperature

Impact of factors on magnetic holding capacity in practice

Effective lifting capacity is influenced by specific conditions, including (from priority):
  • Gap (betwixt the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Steel grade – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Temperature – temperature increase results in weakening of induction. Check the thermal limit for a given model.

Lifting capacity was assessed by applying a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet and the plate decreases the holding force.

H&S for magnets
Safe operation

Handle magnets with awareness. Their immense force can shock even professionals. Stay alert and do not underestimate their power.

Medical interference

For implant holders: Powerful magnets disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.

Operating temperature

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

Mechanical processing

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

Electronic devices

Do not bring magnets close to a purse, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Keep away from electronics

Navigation devices and smartphones are extremely sensitive to magnetism. Direct contact with a strong magnet can ruin the sensors in your phone.

Allergic reactions

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If redness happens, immediately stop handling magnets and use protective gear.

This is not a toy

Neodymium magnets are not intended for children. Accidental ingestion of a few magnets may result in them connecting inside the digestive tract, which poses a critical condition and requires urgent medical intervention.

Material brittleness

Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Bodily injuries

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

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