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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

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Product card - 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 simulation of the product - data

Presented values are the outcome of a physical calculation. Results are based on algorithms for the class Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Use these data as a supplementary guide for designers.

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 pounds
670.0 g / 6.6 N
weak grip
1 mm 3615 Gs
361.5 mT
0.26 kg / 0.57 pounds
259.0 g / 2.5 N
weak grip
2 mm 2101 Gs
210.1 mT
0.09 kg / 0.19 pounds
87.4 g / 0.9 N
weak grip
3 mm 1252 Gs
125.2 mT
0.03 kg / 0.07 pounds
31.1 g / 0.3 N
weak grip
5 mm 524 Gs
52.4 mT
0.01 kg / 0.01 pounds
5.4 g / 0.1 N
weak grip
10 mm 119 Gs
11.9 mT
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
weak grip
15 mm 45 Gs
4.5 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
20 mm 21 Gs
2.1 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
30 mm 7 Gs
0.7 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip
50 mm 2 Gs
0.2 mT
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
weak grip

Table 2: Slippage 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 pounds
134.0 g / 1.3 N
1 mm Stal (~0.2) 0.05 kg / 0.11 pounds
52.0 g / 0.5 N
2 mm Stal (~0.2) 0.02 kg / 0.04 pounds
18.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.01 pounds
6.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 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: Vertical assembly (shearing) - behavior on slippery surfaces
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 pounds
201.0 g / 2.0 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.13 kg / 0.30 pounds
134.0 g / 1.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.07 kg / 0.15 pounds
67.0 g / 0.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.34 kg / 0.74 pounds
335.0 g / 3.3 N

Table 4: Material efficiency (saturation) - sheet metal selection
MW 5x7 / N38

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

Table 5: Working in heat (stability) - power drop
MW 5x7 / N38

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

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

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 4.09 kg / 9.02 pounds
6 079 Gs
0.61 kg / 1.35 pounds
614 g / 6.0 N
N/A
1 mm 2.64 kg / 5.81 pounds
9 332 Gs
0.40 kg / 0.87 pounds
395 g / 3.9 N
2.37 kg / 5.23 pounds
~0 Gs
2 mm 1.58 kg / 3.49 pounds
7 230 Gs
0.24 kg / 0.52 pounds
237 g / 2.3 N
1.42 kg / 3.14 pounds
~0 Gs
3 mm 0.92 kg / 2.03 pounds
5 516 Gs
0.14 kg / 0.30 pounds
138 g / 1.4 N
0.83 kg / 1.83 pounds
~0 Gs
5 mm 0.31 kg / 0.69 pounds
3 224 Gs
0.05 kg / 0.10 pounds
47 g / 0.5 N
0.28 kg / 0.62 pounds
~0 Gs
10 mm 0.03 kg / 0.07 pounds
1 048 Gs
0.00 kg / 0.01 pounds
5 g / 0.0 N
0.03 kg / 0.07 pounds
~0 Gs
20 mm 0.00 kg / 0.00 pounds
238 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
24 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
15 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
10 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
7 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
5 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
4 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) - warnings
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
Mobile device 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: Collisions (cracking risk) - 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: Corrosion resistance
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 (Pc)
MW 5x7 / N38

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

Table 11: Physics of underwater searching
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%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Shear force

*Warning: On a vertical surface, the magnet retains just ~20% of its max power.

2. Steel saturation

*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.

3. Temperature resistance

*For standard magnets, the critical limit is 80°C.

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

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

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
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%
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: 010090-2026
Measurement Calculator
Magnet pull force

Magnetic Field

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The offered product is an exceptionally strong rod magnet, composed of durable NdFeB material, which, with dimensions of Ø5x7 mm, guarantees the highest energy density. The MW 5x7 / N38 component is characterized by high dimensional repeatability and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 0.67 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Moreover, 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 ideal for building electric motors, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power 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, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets N38 are suitable for the majority of applications in modeling and machine building, where extreme 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 in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 5 mm and height 7 mm. The value of 6.60 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.03 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 5 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.

Strengths and weaknesses of neodymium magnets.

Advantages

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:
  • They have stable power, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They retain their magnetic properties even under close interference source,
  • By using a shiny coating of silver, the element presents an professional look,
  • Magnetic induction on the working layer of the magnet remains impressive,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in shaping and the capacity to adapt to specific needs,
  • Key role in high-tech industry – they serve a role in magnetic memories, motor assemblies, advanced medical instruments, also modern systems.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Disadvantages

Disadvantages of NdFeB magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (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 very resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We recommend cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated forms.
  • Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Furthermore, tiny parts of these devices can be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Best holding force of the magnet in ideal parameterswhat contributes to it?

Information about lifting capacity was defined for the most favorable conditions, including:
  • on a block made of structural steel, optimally conducting the magnetic field
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • characterized by even structure
  • with direct contact (without paint)
  • during detachment in a direction perpendicular to the mounting surface
  • in stable room temperature

Lifting capacity in practice – influencing factors

In practice, the actual holding force results from several key aspects, ranked from the most important:
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
  • Base massiveness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be escaped into the air.
  • Metal type – different alloys reacts the same. High carbon content weaken the attraction effect.
  • Surface finish – ideal contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
  • Thermal factor – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, however under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate lowers the lifting capacity.

Safe handling of NdFeB magnets
Impact on smartphones

GPS units and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Material brittleness

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

Do not drill into magnets

Combustion risk: Neodymium dust is highly flammable. Do not process magnets without safety gear as this risks ignition.

Threat to electronics

Intense magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Pacemakers

Medical warning: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Operating temperature

Standard neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Do not give to children

Strictly store magnets away from children. Ingestion danger is high, and the effects of magnets clamping inside the body are very dangerous.

Respect the power

Handle with care. Rare earth magnets act from a long distance and connect with massive power, often quicker than you can react.

Crushing risk

Danger of trauma: The attraction force is so great that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.

Skin irritation risks

Medical facts indicate that the nickel plating (the usual finish) is a potent allergen. If you have an allergy, refrain from direct skin contact or select coated magnets.

Caution! Learn more about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98