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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

bulk discounts:

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Product card - 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

Physical modeling of the magnet - data

Presented information constitute the outcome of a engineering calculation. Results were calculated on algorithms for the class Nd2Fe14B. Actual conditions may deviate from the simulation results. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static force (force vs distance) - interaction chart
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 force (wall)
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 (shearing) - 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 (substrate influence) - sheet metal selection
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 resistance (material behavior) - power drop
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 (attraction) - forces in the system
MW 5x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding 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: Hazards (electronics) - warnings
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
Timepiece 20 Gs (2.0 mT) 2.0 cm
Mobile device 40 Gs (4.0 mT) 1.5 cm
Car key 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: Collisions (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: Coating parameters (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: Construction data (Flux)
MW 5x3 / N38

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

Table 11: Hydrostatics and buoyancy
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%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Wall mount (shear)

*Caution: On a vertical wall, the magnet retains merely a fraction of its max power.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) severely reduces the holding force.

3. Power loss vs temp

*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 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%
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: 010087-2026
Magnet Unit Converter
Pulling force

Magnetic Induction

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This product is an extremely powerful cylindrical magnet, made from advanced NdFeB material, which, at dimensions of Ø5x3 mm, guarantees the highest energy density. The MW 5x3 / N38 component features an accuracy of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 0.84 kg), this product is in stock from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, 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 ideal for building generators, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the high power of 8.25 N with a weight of only 0.44 g, this rod is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 5.1 mm) using epoxy glues. To ensure long-term durability 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 professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø5x3), 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 3 mm. The key parameter here is the holding force 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 external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 3 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is most desirable 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 through the diameter if your project requires it.

Advantages and disadvantages of rare earth magnets.

Pros

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • Their strength is durable, and after around ten years it decreases only by ~1% (according to research),
  • They are extremely resistant to demagnetization induced by external disturbances,
  • Thanks to the shiny finish, the coating of nickel, gold, or silver gives an elegant appearance,
  • Neodymium magnets achieve maximum magnetic induction on a contact point, which allows for strong attraction,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to flexibility in designing and the ability to adapt to client solutions,
  • Key role in high-tech industry – they are utilized in hard drives, brushless drives, medical equipment, and multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and 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. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
  • We suggest cover - magnetic holder, due to difficulties in creating threads inside the magnet and complex shapes.
  • Health risk to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the context of child safety. Furthermore, small elements of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • With mass production the cost of neodymium magnets is economically unviable,

Pull force analysis

Optimal lifting capacity of a neodymium magnetwhat affects it?

Holding force of 0.84 kg is a theoretical maximum value conducted under the following configuration:
  • with the application of a yoke made of low-carbon steel, ensuring full magnetic saturation
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • characterized by smoothness
  • under conditions of no distance (metal-to-metal)
  • during pulling in a direction vertical to the plane
  • in stable room temperature

Practical aspects of lifting capacity – factors

Bear in mind that the application force will differ subject to the following factors, starting with the most relevant:
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) 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 exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Base massiveness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be lost into the air.
  • Steel type – mild steel gives the best results. Alloy admixtures reduce magnetic properties and holding force.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal weaken the grip.
  • Temperature influence – hot environment reduces pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was assessed using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the holding force.

Warnings
Magnet fragility

Protect your eyes. Magnets can explode upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Allergic reactions

Certain individuals suffer from a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Extended handling may cause skin redness. We strongly advise wear safety gloves.

Power loss in heat

Regular neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.

Magnetic interference

A powerful magnetic field negatively affects the functioning of compasses in phones and navigation systems. Do not bring magnets near a device to avoid breaking the sensors.

Fire risk

Fire warning: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Keep away from children

Absolutely store magnets away from children. Choking hazard is high, and the effects of magnets connecting inside the body are fatal.

Hand protection

Watch your fingers. Two large magnets will join instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Pacemakers

For implant holders: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or request help to work with the magnets.

Respect the power

Use magnets with awareness. Their huge power can surprise even experienced users. Stay alert and respect their power.

Data carriers

Do not bring magnets close to a wallet, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Security! Details 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