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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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Technical details - 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

Technical analysis of the assembly - technical parameters

Presented values constitute the direct effect of a mathematical calculation. Results are based on algorithms for the class Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these calculations as a reference point for designers.

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
weak grip
1 mm 1900 Gs
190.0 mT
0.42 kg / 0.92 lbs
419.1 g / 4.1 N
weak grip
2 mm 1308 Gs
130.8 mT
0.20 kg / 0.44 lbs
198.6 g / 1.9 N
weak grip
3 mm 859 Gs
85.9 mT
0.09 kg / 0.19 lbs
85.7 g / 0.8 N
weak grip
5 mm 380 Gs
38.0 mT
0.02 kg / 0.04 lbs
16.7 g / 0.2 N
weak grip
10 mm 79 Gs
7.9 mT
0.00 kg / 0.00 lbs
0.7 g / 0.0 N
weak grip
15 mm 27 Gs
2.7 mT
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
weak grip
20 mm 12 Gs
1.2 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
weak grip
30 mm 4 Gs
0.4 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: Shear 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: Wall mounting (sliding) - vertical pull
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: Material efficiency (substrate influence) - sheet metal selection
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 (material behavior) - power drop
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: Magnet-Magnet interaction (attraction) - field range
MW 7x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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: Protective zones (implants) - 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
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) 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: Anti-corrosion coating durability
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%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
1. Wall mount (shear)

*Note: On a vertical surface, the magnet retains just ~20% of its perpendicular strength.

2. Steel saturation

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

3. Power loss vs temp

*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

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 specification and ecology
Material specification
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: 010393-2026
Quick Unit Converter
Magnet pull force

Field Strength

See also offers

The presented product is a very strong rod magnet, composed of durable NdFeB material, which, with dimensions of Ø7x1.5 mm, guarantees the highest energy density. The MW 7x1.5 / N38 component boasts high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 0.69 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 6.75 N with a weight of only 0.43 g, this rod is indispensable in electronics and wherever low weight is crucial.
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 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.
Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need the strongest magnets in the same volume (Ø7x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
This model is characterized by dimensions Ø7x1.5 mm, which, at a weight of 0.43 g, makes it an element with high magnetic energy density. The value of 6.75 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.43 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 7 mm. Such an arrangement is most desirable 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.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They do not lose strength, even after approximately 10 years – the drop in lifting capacity is only ~1% (according to tests),
  • They maintain their magnetic properties even under strong external field,
  • A magnet with a shiny gold surface has better aesthetics,
  • Magnets are characterized by impressive magnetic induction on the surface,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • In view of the ability of precise forming and adaptation to specialized requirements, magnetic components can be modeled in a broad palette of shapes and sizes, which increases their versatility,
  • Fundamental importance in innovative solutions – they are commonly used in magnetic memories, electric motors, medical devices, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in miniature devices

Limitations

What to avoid - cons of neodymium magnets and ways of using them
  • To avoid cracks upon strong impacts, 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 strength. 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 start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in producing threads and complex forms in magnets, we propose using a housing - magnetic mechanism.
  • Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Additionally, small components of these magnets are able to complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Optimal lifting capacity of a neodymium magnetwhat it depends on?

Information about lifting capacity is the result of a measurement for optimal configuration, including:
  • using a sheet made of mild steel, acting as a circuit closing element
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • with a plane cleaned and smooth
  • with direct contact (no paint)
  • under perpendicular application of breakaway force (90-degree angle)
  • in temp. approx. 20°C

Impact of factors on magnetic holding capacity in practice

During everyday use, the real power is determined by several key aspects, presented from the most important:
  • Distance (betwixt the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Angle of force application – highest force is reached only during perpendicular pulling. The shear force of the magnet along the plate is typically several 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 generating force.
  • Material type – ideal substrate is pure iron steel. Cast iron may attract less.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate reduces the lifting capacity.

Safety rules for work with neodymium magnets
Pacemakers

Patients with a pacemaker have to maintain an large gap from magnets. The magnetism can interfere with the operation of the implant.

Magnet fragility

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

GPS and phone interference

GPS units and mobile phones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can permanently damage the sensors in your phone.

Do not drill into magnets

Fire hazard: Neodymium dust is explosive. Avoid machining magnets in home conditions as this may cause fire.

Power loss in heat

Standard neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Allergy Warning

Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, prevent direct skin contact and choose versions in plastic housing.

Bodily injuries

Large magnets can crush fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.

Handling rules

Use magnets consciously. Their powerful strength can surprise even professionals. Stay alert and do not underestimate their power.

Product not for children

Only for adults. Tiny parts can be swallowed, causing intestinal necrosis. Keep out of reach of children and animals.

Electronic devices

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

Attention! Looking for details? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98