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MW 5x7 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010090

GTIN/EAN: 5906301810896

5.00

Diameter Ø

5 mm [±0,1 mm]

Height

7 mm [±0,1 mm]

Weight

1.03 g

Magnetization Direction

↑ axial

Load capacity

0.67 kg / 6.60 N

Magnetic Induction

582.40 mT / 5824 Gs

Coating

[NiCuNi] Nickel

0.726 with VAT / pcs + price for transport

0.590 ZŁ net + 23% VAT / pcs

bulk discounts:

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Contact us by phone +48 22 499 98 98 otherwise get in touch via contact form our website.
Force and structure of neodymium magnets can be verified with our power calculator.

Orders placed before 14:00 will be shipped the same business day.

Detailed specification - MW 5x7 / N38 - cylindrical magnet

Specification / characteristics - MW 5x7 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010090
GTIN/EAN 5906301810896
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 5 mm [±0,1 mm]
Height 7 mm [±0,1 mm]
Weight 1.03 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.67 kg / 6.60 N
Magnetic Induction ~ ? 582.40 mT / 5824 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x7 / 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 modeling of the product - data

Presented information represent the outcome of a physical calculation. Results are based on algorithms for the class Nd2Fe14B. Operational parameters may differ from theoretical values. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
MW 5x7 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5815 Gs
581.5 mT
0.67 kg / 1.48 LBS
670.0 g / 6.6 N
safe
1 mm 3615 Gs
361.5 mT
0.26 kg / 0.57 LBS
259.0 g / 2.5 N
safe
2 mm 2101 Gs
210.1 mT
0.09 kg / 0.19 LBS
87.4 g / 0.9 N
safe
3 mm 1252 Gs
125.2 mT
0.03 kg / 0.07 LBS
31.1 g / 0.3 N
safe
5 mm 524 Gs
52.4 mT
0.01 kg / 0.01 LBS
5.4 g / 0.1 N
safe
10 mm 119 Gs
11.9 mT
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
safe
15 mm 45 Gs
4.5 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
20 mm 21 Gs
2.1 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
30 mm 7 Gs
0.7 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe
50 mm 2 Gs
0.2 mT
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
safe

Table 2: Vertical hold (wall)
MW 5x7 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.13 kg / 0.30 LBS
134.0 g / 1.3 N
1 mm Stal (~0.2) 0.05 kg / 0.11 LBS
52.0 g / 0.5 N
2 mm Stal (~0.2) 0.02 kg / 0.04 LBS
18.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.01 LBS
6.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 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: Wall mounting (shearing) - vertical pull
MW 5x7 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.20 kg / 0.44 LBS
201.0 g / 2.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.13 kg / 0.30 LBS
134.0 g / 1.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.15 LBS
67.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.34 kg / 0.74 LBS
335.0 g / 3.3 N

Table 4: Material efficiency (saturation) - power losses
MW 5x7 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.07 kg / 0.15 LBS
67.0 g / 0.7 N
1 mm
25%
0.17 kg / 0.37 LBS
167.5 g / 1.6 N
2 mm
50%
0.34 kg / 0.74 LBS
335.0 g / 3.3 N
3 mm
75%
0.50 kg / 1.11 LBS
502.5 g / 4.9 N
5 mm
100%
0.67 kg / 1.48 LBS
670.0 g / 6.6 N
10 mm
100%
0.67 kg / 1.48 LBS
670.0 g / 6.6 N
11 mm
100%
0.67 kg / 1.48 LBS
670.0 g / 6.6 N
12 mm
100%
0.67 kg / 1.48 LBS
670.0 g / 6.6 N

Table 5: Thermal stability (material behavior) - thermal limit
MW 5x7 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.67 kg / 1.48 LBS
670.0 g / 6.6 N
OK
40 °C -2.2% 0.66 kg / 1.44 LBS
655.3 g / 6.4 N
OK
60 °C -4.4% 0.64 kg / 1.41 LBS
640.5 g / 6.3 N
OK
80 °C -6.6% 0.63 kg / 1.38 LBS
625.8 g / 6.1 N
100 °C -28.8% 0.48 kg / 1.05 LBS
477.0 g / 4.7 N

Table 6: Two magnets (attraction) - field collision
MW 5x7 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.09 kg / 9.02 LBS
6 079 Gs
0.61 kg / 1.35 LBS
614 g / 6.0 N
N/A
1 mm 2.64 kg / 5.81 LBS
9 332 Gs
0.40 kg / 0.87 LBS
395 g / 3.9 N
2.37 kg / 5.23 LBS
~0 Gs
2 mm 1.58 kg / 3.49 LBS
7 230 Gs
0.24 kg / 0.52 LBS
237 g / 2.3 N
1.42 kg / 3.14 LBS
~0 Gs
3 mm 0.92 kg / 2.03 LBS
5 516 Gs
0.14 kg / 0.30 LBS
138 g / 1.4 N
0.83 kg / 1.83 LBS
~0 Gs
5 mm 0.31 kg / 0.69 LBS
3 224 Gs
0.05 kg / 0.10 LBS
47 g / 0.5 N
0.28 kg / 0.62 LBS
~0 Gs
10 mm 0.03 kg / 0.07 LBS
1 048 Gs
0.00 kg / 0.01 LBS
5 g / 0.0 N
0.03 kg / 0.07 LBS
~0 Gs
20 mm 0.00 kg / 0.00 LBS
238 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
24 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
15 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
10 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
7 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
5 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
4 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
0.00 kg / 0.00 LBS
~0 Gs

Table 7: Safety (HSE) (implants) - precautionary measures
MW 5x7 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 3.5 cm
Hearing aid 10 Gs (1.0 mT) 3.0 cm
Mechanical watch 20 Gs (2.0 mT) 2.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.0 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: Impact energy (kinetic energy) - warning
MW 5x7 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 25.73 km/h
(7.15 m/s)
0.03 J
30 mm 44.55 km/h
(12.38 m/s)
0.08 J
50 mm 57.52 km/h
(15.98 m/s)
0.13 J
100 mm 81.34 km/h
(22.59 m/s)
0.26 J

Table 9: Anti-corrosion coating durability
MW 5x7 / 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 5x7 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 219 Mx 12.2 µWb
Pc Coefficient 1.05 High (Stable)

Table 11: Hydrostatics and buoyancy
MW 5x7 / N38

Environment Effective steel pull Effect
Air (land) 0.67 kg Standard
Water (riverbed) 0.77 kg
(+0.10 kg buoyancy gain)
+14.5%
Rust risk: 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

*Warning: On a vertical wall, the magnet holds only approx. 20-30% of its nominal pull.

2. Efficiency vs thickness

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

3. Thermal stability

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.05

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: 010090-2026
Magnet Unit Converter
Force (pull)

Magnetic Induction

View also proposals

This product is a very strong cylindrical magnet, composed of modern NdFeB material, which, at dimensions of Ø5x7 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 0.67 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Additionally, its 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 electric motors, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 6.60 N with a weight of only 1.03 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure long-term durability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets N38 are strong enough for 90% 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 (Ø5x7), 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 5 mm and height 7 mm. The key parameter here is the lifting capacity amounting to approximately 0.67 kg (force ~6.60 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 7 mm), which means that the N and S poles are located on the flat, circular surfaces. 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.

Strengths and weaknesses of neodymium magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:
  • They retain attractive force for nearly 10 years – the drop is just ~1% (in theory),
  • Magnets perfectly resist against demagnetization caused by foreign field sources,
  • Thanks to the metallic finish, the plating of nickel, gold, or silver gives an visually attractive appearance,
  • Magnets have excellent magnetic induction on the active area,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • In view of the possibility of free forming and customization to specialized requirements, NdFeB magnets can be produced in a variety of shapes and sizes, which increases their versatility,
  • Wide application in future technologies – they are commonly used in magnetic memories, brushless drives, precision medical tools, also complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Problematic aspects of neodymium magnets: tips and applications.
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in creating threads and complex forms in magnets, we propose using casing - magnetic mechanism.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these magnets can be problematic in diagnostics medical after entering the body.
  • Due to complex production process, their price exceeds standard values,

Holding force characteristics

Maximum magnetic pulling forcewhat affects it?

The specified lifting capacity refers to the peak performance, obtained under laboratory conditions, namely:
  • using a base made of mild steel, functioning as a ideal flux conductor
  • whose transverse dimension equals approx. 10 mm
  • with a plane free of scratches
  • under conditions of gap-free contact (surface-to-surface)
  • for force acting at a right angle (in the magnet axis)
  • at conditions approx. 20°C

Impact of factors on magnetic holding capacity in practice

During everyday use, the real power depends on a number of factors, listed from the most important:
  • Distance (betwixt the magnet and the metal), since even a tiny clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Chemical composition of the base – mild steel gives the best results. Alloy steels lower magnetic properties and holding force.
  • Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Temperature influence – hot environment reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as 75%. Moreover, even a minimal clearance between the magnet and the plate reduces the load capacity.

Safety rules for work with NdFeB magnets
Pacemakers

Warning for patients: Powerful magnets affect electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Skin irritation risks

It is widely known that nickel (the usual finish) is a strong allergen. If you have an allergy, prevent direct skin contact and select coated magnets.

Keep away from computers

Do not bring magnets near a purse, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.

Mechanical processing

Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Fragile material

Watch out for shards. Magnets can explode upon violent connection, ejecting shards into the air. Wear goggles.

Threat to navigation

Be aware: neodymium magnets generate a field that interferes with precision electronics. Maintain a safe distance from your mobile, tablet, and GPS.

Permanent damage

Standard neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.

Danger to the youngest

Absolutely store magnets away from children. Choking hazard is significant, and the consequences of magnets connecting inside the body are life-threatening.

Serious injuries

Pinching hazard: The pulling power is so immense that it can result in hematomas, pinching, and even bone fractures. Use thick gloves.

Safe operation

Before starting, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

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

e-mail: bok@dhit.pl

tel: +48 888 99 98 98