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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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Lifting power as well as appearance of neodymium magnets can be calculated with our force calculator.

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Technical parameters of the product - 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

Technical analysis of the magnet - report

Presented data are the direct effect of a mathematical simulation. Values are based on algorithms for the material Nd2Fe14B. Operational parameters may differ. Please consider these data as a reference point for designers.

Table 1: Static pull force (pull vs gap) - interaction chart
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: 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 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) - 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 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: Steel thickness (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 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 resistance (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 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: Magnet-Magnet interaction (attraction) - field range
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 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: Protective zones (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
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: Impact energy (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: Surface protection spec
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: Submerged application
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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Sliding resistance

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

2. Efficiency vs thickness

*Thin steel (e.g. computer case) drastically reduces the holding force.

3. Heat tolerance

*For N38 material, 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%
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
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Force (pull)

Magnetic Induction

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This product is an extremely powerful rod magnet, manufactured from durable NdFeB material, which, at dimensions of Ø5x7 mm, guarantees optimal power. The MW 5x7 / N38 component is characterized by high dimensional repeatability and industrial build quality, making it an ideal 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 rapid order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.
This model is perfect for building electric motors, advanced sensors, and efficient magnetic separators, 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 rod 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 chipping the coating of this precision component. To ensure long-term durability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Magnets NdFeB grade N38 are suitable for 90% of applications in automation 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 available off-the-shelf in our warehouse.
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.
This rod magnet 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 diametrically if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even over around ten years – the reduction in power is only ~1% (theoretically),
  • They are resistant to demagnetization induced by external field influence,
  • Thanks to the elegant finish, the plating of Ni-Cu-Ni, gold-plated, or silver gives an clean appearance,
  • They show high magnetic induction at the operating surface, which increases their power,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures approaching 230°C and above...
  • Thanks to freedom in forming and the capacity to modify to complex applications,
  • Fundamental importance in electronics industry – they are used in mass storage devices, brushless drives, precision medical tools, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in small systems

Disadvantages

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as 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. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
  • We recommend a housing - magnetic holder, due to difficulties in creating threads inside the magnet and complex forms.
  • Possible danger to health – tiny shards of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small components of these products can be problematic in diagnostics medical after entering the body.
  • Due to neodymium price, their price exceeds standard values,

Holding force characteristics

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

The specified lifting capacity refers to the maximum value, obtained under optimal environment, meaning:
  • on a plate made of mild steel, perfectly concentrating the magnetic flux
  • with a thickness no less than 10 mm
  • with an ideally smooth contact surface
  • with direct contact (without impurities)
  • during pulling in a direction perpendicular to the mounting surface
  • at temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

Bear in mind that the magnet holding may be lower depending on elements below, starting with the most relevant:
  • Clearance – the presence of foreign body (paint, tape, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Plate thickness – too thin plate does not close the flux, causing part of the power to be lost to the other side.
  • Plate material – mild steel attracts best. Higher carbon content decrease magnetic permeability and lifting capacity.
  • Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal factor – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Safety rules for work with NdFeB magnets
Compass and GPS

Navigation devices and mobile phones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Magnet fragility

Watch out for shards. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.

Respect the power

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

Sensitization to coating

Allergy Notice: The nickel-copper-nickel coating contains nickel. If an allergic reaction happens, cease working with magnets and use protective gear.

Thermal limits

Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. This process is irreversible.

Machining danger

Combustion risk: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Hand protection

Risk of injury: The attraction force is so immense that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.

Product not for children

Product intended for adults. Tiny parts can be swallowed, causing severe trauma. Store out of reach of children and animals.

Data carriers

Very strong magnetic fields can erase data on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

Warning for heart patients

People with a heart stimulator must maintain an safe separation from magnets. The magnetism can interfere with the operation of the life-saving device.

Security! Need more info? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98