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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

product parameters »

0.726 ZŁ with VAT / pcs + price for transport

0.590 ZŁ net + 23% VAT / pcs

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Technical data - 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

Physical modeling of the product - technical parameters

The following information represent the direct effect of a engineering simulation. Values rely on models for the material Nd2Fe14B. Real-world conditions may deviate from the simulation results. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs gap) - characteristics
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
 low risk
1 mm 3615 Gs
361.5 mT
 0.26 kg / 0.57 LBS
259.0 g / 2.5 N
 low risk
2 mm 2101 Gs
210.1 mT
 0.09 kg / 0.19 LBS
87.4 g / 0.9 N
 low risk
3 mm 1252 Gs
125.2 mT
 0.03 kg / 0.07 LBS
31.1 g / 0.3 N
 low risk
5 mm 524 Gs
52.4 mT
 0.01 kg / 0.01 LBS
5.4 g / 0.1 N
 low risk
10 mm 119 Gs
11.9 mT
 0.00 kg / 0.00 LBS
0.3 g / 0.0 N
 low risk
15 mm 45 Gs
4.5 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
20 mm 21 Gs
2.1 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
30 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
50 mm 2 Gs
0.2 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
Pulling power drops sharply per each millimeter of distance. Note that even the smallest gap (e.g., contamination, paint, dust) strongly reduces the pull force. Magnetic products hold most effectively during direct contact; distance weakens the force. See how flashily the parameters fall, when the product does not touch tightly to the metal substrate. When planning the arrangement, discard additional spacers.

Table 2: Sliding hold (vertical surface)
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
This section calculates the theoretical weight limit sufficient to cause the sliding of the magnet vertically on a vertical steel plate (considering typical friction). This value is a function of the separation distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - 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
When placing a magnet on a vertical wall (e.g., a car body), it will only hold only approx. 1/5 of its maximum pull force. Gravity as well as a low friction coefficient cause that products move down easier than they pop off the substrate. Planning a wall mount? Note that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the holder will slide down under a significantly smaller cargo. Application of an anti-slip layer can effectively increase the grip.

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 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
A thin sheet cannot absorb the entire magnetic field, which weakens actual performance of the magnet. If you attach a powerful product to a thin surface, the flux will penetrate right through and the holding will be smaller. To achieve full efficiency of this neodymium's potential, you need a suitably thick piece of steel. The saturation phenomenon causes that on thin elements (e.g., thin profiles), the magnet works worse. We recommend selecting the steel dimension based on the following data.

Table 5: Thermal resistance (material behavior) - resistance threshold
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
Standard neodymium magnets irreversibly lose power above the temperature limit. Watch out for overheating – heat can irreversibly demagnetize this product. With every degree above norm, the magnet's capacity temporarily lowers. Do not use this product in hot environments higher than its operating temperature limit. Exceeding the critical threshold will cause permanent loss of magnetism.
*Engineering note: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (low Pc) are more susceptible to demagnetization at lower temperatures compared to rod magnets. Warning indicator in the table points to a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (repulsion) - forces in the system
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
Two magnets interact from a much further distance than a magnet and sheet setup. Such a system of magnet-to-magnet generates a stronger field and a larger range of action. Want to build a solid fastener? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the impact force is massive. The levitation is slightly lower than the attraction, but still large.
*Field value for N-N configuration reaches ~0 Gs at the geometric center between the magnets (due to field cancellation).
Attention: Figures demonstrate friction force of two identical magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - 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
Timepiece 20 Gs (2.0 mT) 2.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 2.0 cm
Remote 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
A strong magnetic field is a serious hazard to electronics as well as pacemakers. These neodymiums produce a field that destroys function of digital equipment. Remember: the invisible magnetic field acts through matter and glass. Exceptional care must be taken by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, remotes, speakers, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
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
NdFeB products are prone to chipping – a collision with steel causes immediate chipping. Watch the impact speed – a magnet released freely becomes dangerous. Impact energy can cause material chips or painful pinches to skin. Hold the magnet firmly during mounting so it doesn't hit with great force against the metal. A collision at high speed ends with a crack of the neodymium. Wear eye protection when playing with powerful specimens.

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)
Neodymium magnets are highly susceptible to corrosion without proper protection. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Flux)
MW 5x7 / N38

Parameter Value SI Unit / Description
Magnetic Flux 1 219 Mx 12.2 µWb
Pc Coefficient 1.05 High (Stable)
Flux value passing through the magnet pole. Essential parameter when building generators and motors. The Pc coefficient determines the working geometry.

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!
Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Shear force

*Caution: On a vertical wall, the magnet holds just a fraction of its perpendicular strength.

2. Steel thickness impact

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

3. Temperature resistance

*For N38 grade, 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
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%
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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MW 5x7 / N38 - cylindrical magnet
Product available Ships tomorrow

MW 5x7 / N38 - cylindrical magnet

0.726 ZŁ brutto / pcs
The presented product is a very strong rod magnet, made from advanced NdFeB material, which, at dimensions of Ø5x7 mm, guarantees the highest energy density. This specific item features an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.67 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its triple-layer 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 generators, 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 cylindrical magnet is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 5.1 mm) using 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.
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 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.
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 diametrically if your project requires it.

Advantages and disadvantages of rare earth magnets.

Advantages

Apart from their notable magnetism, neodymium magnets have these key benefits:
  • They have stable power, and over more than ten years their performance decreases symbolically – ~1% (according to theory),
  • They are extremely resistant to demagnetization induced by external magnetic fields,
  • The use of an elegant layer of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • The surface of neodymium magnets generates a powerful magnetic field – this is a distinguishing feature,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of detailed shaping and adapting to complex requirements,
  • Wide application in high-tech industry – they are utilized in data components, electromotive mechanisms, advanced medical instruments, as well as other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in small systems

Disadvantages

Problematic aspects of neodymium magnets: application proposals
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in creating threads and complex forms in magnets, we recommend using cover - magnetic mechanism.
  • Health risk resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. Additionally, tiny parts of these products are able to be problematic in diagnostics medical after entering the body.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Pull force analysis

Highest magnetic holding force – what contributes to it?

The declared magnet strength refers to the limit force, recorded under optimal environment, namely:
  • with the application of a yoke made of special test steel, ensuring full magnetic saturation
  • possessing a massiveness of at least 10 mm to avoid saturation
  • characterized by even structure
  • without any air gap between the magnet and steel
  • under vertical application of breakaway force (90-degree angle)
  • in temp. approx. 20°C

Determinants of lifting force in real conditions

During everyday use, the real power depends on a number of factors, presented from crucial:
  • Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the surface is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be lost to the other side.
  • Material composition – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Surface condition – ground elements guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
  • Temperature – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a small distance between the magnet and the plate decreases the load capacity.

Warnings
This is not a toy

NdFeB magnets are not suitable for play. Accidental ingestion of several magnets may result in them attracting across intestines, which constitutes a severe health hazard and requires urgent medical intervention.

Safe distance

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

Bone fractures

Danger of trauma: The attraction force is so immense that it can result in blood blisters, pinching, and broken bones. Use thick gloves.

Shattering risk

Watch out for shards. Magnets can fracture upon violent connection, ejecting shards into the air. We recommend safety glasses.

Heat warning

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.

Combustion hazard

Machining of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Danger to pacemakers

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Powerful field

Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Allergy Warning

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction appears, cease working with magnets and use protective gear.

Magnetic interference

Be aware: neodymium magnets generate a field that disrupts precision electronics. Maintain a separation from your mobile, device, and navigation systems.

Warning! Details about hazards in the article: Safety of working with magnets.