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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

see parameters »

0.726 ZŁ with VAT / pcs + price for transport

0.590 ZŁ net + 23% VAT / pcs

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Technical 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

Physical simulation of the magnet - report

The following information are the direct effect of a engineering analysis. Results are based on algorithms for the material Nd2Fe14B. Actual parameters might slightly differ. Please consider these data as a preliminary roadmap for designers.

Table 1: Static pull force (force vs distance) - 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
 low risk
1 mm 3615 Gs
361.5 mT
 0.26 kg / 0.57 pounds
259.0 g / 2.5 N
 low risk
2 mm 2101 Gs
210.1 mT
 0.09 kg / 0.19 pounds
87.4 g / 0.9 N
 low risk
3 mm 1252 Gs
125.2 mT
 0.03 kg / 0.07 pounds
31.1 g / 0.3 N
 low risk
5 mm 524 Gs
52.4 mT
 0.01 kg / 0.01 pounds
5.4 g / 0.1 N
 low risk
10 mm 119 Gs
11.9 mT
 0.00 kg / 0.00 pounds
0.3 g / 0.0 N
 low risk
15 mm 45 Gs
4.5 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
20 mm 21 Gs
2.1 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
30 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
50 mm 2 Gs
0.2 mT
 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
 low risk
Pulling power weakens sharply with every mm of spacing. Note that every additional insulation layer (e.g., contamination, paint, dust) noticeably diminishes the holding power. Magnets operate most effectively during direct contact; distance drastically cuts the power. See how flashily the pull force fall, when the product does not touch flatly to the metal substrate. When calculating the assembly, discard redundant distances.

Table 2: Slippage load (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 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
The table below defines the approximate force needed to initiate the downward movement of the magnet downwards along a vertical steel wall (assuming standard friction coefficient). The holding force depends on the 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 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
When hanging a magnet on a upright wall (e.g., a fridge), it you can count on just about 1/5 of its maximum pull force. Gravitational force as well as a weak degree of grip mean that magnets move down faster than they pull off. Want to create a vertical fastening? Consider that the shear force is significantly lower than the maximum static pull force. On a slippery surface, the holder will give way down under a significantly smaller load. Using a rubber coating can drastically improve the result.

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 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
A thin sheet cannot focus the entire magnetic field, which weakens actual performance of the holder. Should you mount a strong magnet to a too thin substrate, the flux will penetrate right through and the attraction force will be weaker. To achieve the maximum of this magnet's potential, you require a sufficiently solid element of metal. The material oversaturation means that on delicate walls (e.g., car bodies), the product holds weaker. We recommend selecting the steel cross-section from these parameters.

Table 5: Thermal stability (stability) - 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 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
Classic neodymiums change their properties parameters after exceeding the maximum temperature. Watch out for overheating – high temperature can permanently demagnetize this magnet. With increasing heat, the magnet's capacity momentarily lowers. Avoid using this magnet in hot environments exceeding its working range. Too high temperature will lead to permanent loss of magnetic properties.
*Engineering note: Heat tolerance is determined by both grade, but also on the magnet's shape. Low-profile magnets (low Pc) are more susceptible to demagnetization under lower heat stress than taller cylinders. Red status in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - field range
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 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
Two magnets attract each other from a wider radius than a neodymium and metal setup. The connection of two magnets generates a stronger field and a further horizon of operation. Designing a solid fastener? Utilize two neodymiums instead of a neodymium and a steel. Remember that when attracting two neodymiums, the collision energy is huge. The repulsion force is slightly lower than the attraction, but still significant.
*Field value between like poles drops to ~0 Gs at the midpoint between the magnets (due to field cancellation).
* Results apply to sliding force of a pair of identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (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
Mechanical watch 20 Gs (2.0 mT) 2.5 cm
Mobile device 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
Extremely neodym field is a real danger to electronics and pacemakers. These NdFeB products generate a flux that disrupts operation of digital equipment. Be aware: the invisible magnetic field passes through tissues and housings. Special caution must be taken by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - 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 delicate – a violent impact against metal risks their cracking. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Striking energy can trigger coating fragments or injury to fingers. Be sure to control the product during installation so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Use safety goggles when handling with powerful specimens.

Table 9: Coating parameters (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)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Note the thickness of the protective layer.

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)
Total magnetic flux emitted by the magnet pole. Key data in coil applications as well as sensors. Pc value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
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%
Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.
1. Wall mount (shear)

*Note: On a vertical wall, the magnet retains just approx. 20-30% of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) severely reduces the holding force.

3. Heat tolerance

*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) = 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 and environmental data
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%
Ecology and recycling (GPSR)
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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The offered product is an extremely powerful cylindrical magnet, composed of advanced NdFeB material, which, with 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 the most demanding engineers and designers. As a magnetic rod with impressive force (approx. 0.67 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced sensors, and efficient filters, where field concentration 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.
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 professional component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel 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 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 key parameter here is the holding force amounting to approximately 0.67 kg (force ~6.60 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it 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. 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.

Strengths and weaknesses of neodymium magnets.

Strengths

Apart from their consistent magnetism, neodymium magnets have these key benefits:
  • Their power remains stable, and after approximately 10 years it decreases only by ~1% (according to research),
  • Magnets very well protect themselves against loss of magnetization caused by ambient magnetic noise,
  • A magnet with a shiny silver surface has better aesthetics,
  • Magnets exhibit extremely high magnetic induction on the working surface,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to versatility in shaping and the ability to customize to unusual requirements,
  • Huge importance in modern industrial fields – they are used in magnetic memories, electric drive systems, precision medical tools, as well as modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Disadvantages of neodymium magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Due to limitations in producing nuts and complicated shapes in magnets, we propose using cover - magnetic holder.
  • Health risk to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small components of these magnets can be problematic in diagnostics medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum lifting force for a neodymium magnet – what it depends on?

Information about lifting capacity is the result of a measurement for optimal configuration, taking into account:
  • with the use of a sheet made of low-carbon steel, ensuring maximum field concentration
  • possessing a massiveness of min. 10 mm to avoid saturation
  • with a plane cleaned and smooth
  • without the slightest air gap between the magnet and steel
  • under axial application of breakaway force (90-degree angle)
  • at ambient temperature room level

Lifting capacity in practice – influencing factors

Please note that the working load will differ subject to the following factors, starting with the most relevant:
  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Angle of force application – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Metal type – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
  • Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet and the plate decreases the lifting capacity.

H&S for magnets
Do not underestimate power

Before starting, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Nickel allergy

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If redness occurs, immediately stop working with magnets and wear gloves.

Keep away from computers

Do not bring magnets near a purse, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Magnetic interference

A powerful magnetic field negatively affects the functioning of magnetometers in smartphones and navigation systems. Maintain magnets near a smartphone to prevent damaging the sensors.

Eye protection

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets will cause them cracking into small pieces.

Fire warning

Powder created during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

Medical interference

Life threat: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Product not for children

Product intended for adults. Small elements can be swallowed, causing serious injuries. Store away from kids and pets.

Bone fractures

Big blocks can smash fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Heat warning

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

Safety First! More info about risks in the article: Magnet Safety Guide.