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MW 5x3 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010087

GTIN/EAN: 5906301810865

5.00

Diameter Ø

5 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

0.44 g

Magnetization Direction

↑ axial

Load capacity

0.84 kg / 8.25 N

Magnetic Induction

475.16 mT / 4752 Gs

Coating

[NiCuNi] Nickel

0.283 with VAT / pcs + price for transport

0.230 ZŁ net + 23% VAT / pcs

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Technical - MW 5x3 / N38 - cylindrical magnet

Specification / characteristics - MW 5x3 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010087
GTIN/EAN 5906301810865
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 3 mm [±0,1 mm]
Weight 0.44 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.84 kg / 8.25 N
Magnetic Induction ~ ? 475.16 mT / 4752 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x3 / 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 analysis of the product - report

These values represent the direct effect of a physical calculation. Values are based on models for the class Nd2Fe14B. Actual performance may differ from theoretical values. Use these data as a reference point during assembly planning.

Table 1: Static force (pull vs gap) - characteristics
MW 5x3 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4745 Gs
474.5 mT
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
safe
1 mm 2955 Gs
295.5 mT
0.33 kg / 0.72 lbs
325.8 g / 3.2 N
safe
2 mm 1672 Gs
167.2 mT
0.10 kg / 0.23 lbs
104.4 g / 1.0 N
safe
3 mm 960 Gs
96.0 mT
0.03 kg / 0.08 lbs
34.4 g / 0.3 N
safe
5 mm 372 Gs
37.2 mT
0.01 kg / 0.01 lbs
5.2 g / 0.1 N
safe
10 mm 74 Gs
7.4 mT
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
safe
15 mm 25 Gs
2.5 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
20 mm 12 Gs
1.2 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
30 mm 4 Gs
0.4 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe
50 mm 1 Gs
0.1 mT
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
safe

Table 2: Slippage hold (vertical surface)
MW 5x3 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.17 kg / 0.37 lbs
168.0 g / 1.6 N
1 mm Stal (~0.2) 0.07 kg / 0.15 lbs
66.0 g / 0.6 N
2 mm Stal (~0.2) 0.02 kg / 0.04 lbs
20.0 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: Vertical assembly (sliding) - vertical pull
MW 5x3 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.25 kg / 0.56 lbs
252.0 g / 2.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.17 kg / 0.37 lbs
168.0 g / 1.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.08 kg / 0.19 lbs
84.0 g / 0.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.42 kg / 0.93 lbs
420.0 g / 4.1 N

Table 4: Steel thickness (saturation) - power losses
MW 5x3 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
0.08 kg / 0.19 lbs
84.0 g / 0.8 N
1 mm
25%
0.21 kg / 0.46 lbs
210.0 g / 2.1 N
2 mm
50%
0.42 kg / 0.93 lbs
420.0 g / 4.1 N
3 mm
75%
0.63 kg / 1.39 lbs
630.0 g / 6.2 N
5 mm
100%
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
10 mm
100%
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
11 mm
100%
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
12 mm
100%
0.84 kg / 1.85 lbs
840.0 g / 8.2 N

Table 5: Thermal stability (stability) - thermal limit
MW 5x3 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.84 kg / 1.85 lbs
840.0 g / 8.2 N
OK
40 °C -2.2% 0.82 kg / 1.81 lbs
821.5 g / 8.1 N
OK
60 °C -4.4% 0.80 kg / 1.77 lbs
803.0 g / 7.9 N
OK
80 °C -6.6% 0.78 kg / 1.73 lbs
784.6 g / 7.7 N
100 °C -28.8% 0.60 kg / 1.32 lbs
598.1 g / 5.9 N

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 5x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 2.73 kg / 6.01 lbs
5 700 Gs
0.41 kg / 0.90 lbs
409 g / 4.0 N
N/A
1 mm 1.77 kg / 3.91 lbs
7 658 Gs
0.27 kg / 0.59 lbs
266 g / 2.6 N
1.60 kg / 3.52 lbs
~0 Gs
2 mm 1.06 kg / 2.33 lbs
5 910 Gs
0.16 kg / 0.35 lbs
159 g / 1.6 N
0.95 kg / 2.10 lbs
~0 Gs
3 mm 0.60 kg / 1.33 lbs
4 460 Gs
0.09 kg / 0.20 lbs
90 g / 0.9 N
0.54 kg / 1.19 lbs
~0 Gs
5 mm 0.19 kg / 0.42 lbs
2 520 Gs
0.03 kg / 0.06 lbs
29 g / 0.3 N
0.17 kg / 0.38 lbs
~0 Gs
10 mm 0.02 kg / 0.04 lbs
745 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
0.02 kg / 0.03 lbs
~0 Gs
20 mm 0.00 kg / 0.00 lbs
147 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
12 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
7 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 (electronics) - precautionary measures
MW 5x3 / 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
Remote 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: Dynamics (kinetic energy) - collision effects
MW 5x3 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 44.07 km/h
(12.24 m/s)
0.03 J
30 mm 76.32 km/h
(21.20 m/s)
0.10 J
50 mm 98.53 km/h
(27.37 m/s)
0.16 J
100 mm 139.35 km/h
(38.71 m/s)
0.33 J

Table 9: Anti-corrosion coating durability
MW 5x3 / 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 5x3 / N38

Parameter Value SI Unit / Description
Magnetic Flux 942 Mx 9.4 µWb
Pc Coefficient 0.66 High (Stable)

Table 11: Submerged application
MW 5x3 / N38

Environment Effective steel pull Effect
Air (land) 0.84 kg Standard
Water (riverbed) 0.96 kg
(+0.12 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 wall, the magnet holds merely a fraction of its perpendicular strength.

2. Plate thickness effect

*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) = 0.66

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 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%
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: 010087-2026
Magnet Unit Converter
Pulling force

Magnetic Field

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The offered product is an extremely powerful cylindrical magnet, produced from modern NdFeB material, which, with dimensions of Ø5x3 mm, guarantees maximum efficiency. The MW 5x3 / N38 component is characterized by high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 0.84 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is ideal for building electric motors, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 8.25 N with a weight of only 0.44 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 5.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, anaerobic resins 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 professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø5x3), 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 3 mm. The key parameter here is the lifting capacity amounting to approximately 0.84 kg (force ~8.25 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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.

Advantages as well as disadvantages of neodymium magnets.

Pros

Apart from their strong magnetism, neodymium magnets have these key benefits:
  • They retain attractive force for almost ten years – the drop is just ~1% (based on simulations),
  • They retain their magnetic properties even under external field action,
  • Thanks to the smooth finish, the plating of nickel, gold, or silver-plated gives an modern appearance,
  • They show high magnetic induction at the operating surface, which affects their effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • In view of the option of flexible molding and customization to unique requirements, NdFeB magnets can be created in a wide range of geometric configurations, which expands the range of possible applications,
  • Versatile presence in future technologies – they find application in hard drives, electromotive mechanisms, medical devices, and modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

What to avoid - cons of neodymium magnets and proposals for their use:
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • Limited possibility of producing threads in the magnet and complex shapes - recommended is casing - magnetic holder.
  • Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Furthermore, small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Optimal lifting capacity of a neodymium magnetwhat it depends on?

The specified lifting capacity represents the peak performance, obtained under ideal test conditions, namely:
  • with the contact of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
  • whose thickness is min. 10 mm
  • characterized by smoothness
  • without any clearance between the magnet and steel
  • under axial force direction (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

Holding efficiency is affected by specific conditions, such as (from most important):
  • Space between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Load vector – highest force is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick plate does not accept the full field, causing part of the power to be wasted into the air.
  • Chemical composition of the base – mild steel gives the best results. Higher carbon content decrease magnetic permeability and lifting capacity.
  • Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
  • Temperature influence – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate lowers the lifting capacity.

Precautions when working with neodymium magnets
Protective goggles

Beware of splinters. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Wear goggles.

Demagnetization risk

Do not overheat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).

Physical harm

Risk of injury: The pulling power is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Choking Hazard

Product intended for adults. Small elements can be swallowed, causing serious injuries. Keep out of reach of kids and pets.

Compass and GPS

Be aware: neodymium magnets produce a field that interferes with precision electronics. Maintain a safe distance from your mobile, device, and GPS.

Do not drill into magnets

Dust generated during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Electronic hazard

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

Skin irritation risks

Certain individuals experience a sensitization to nickel, which is the common plating for NdFeB magnets. Extended handling might lead to an allergic reaction. We suggest use protective gloves.

ICD Warning

For implant holders: Powerful magnets affect electronics. Keep at least 30 cm distance or request help to handle the magnets.

Handling rules

Exercise caution. Neodymium magnets act from a long distance and snap with huge force, often quicker than you can move away.

Attention! More info about risks in the article: Safety of working with magnets.