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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 specification - 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

Technical analysis of the assembly - report

Presented data represent the result of a mathematical calculation. Values were calculated on algorithms for the class Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Use these calculations as a supplementary guide when designing systems.

Table 1: Static pull force (force 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: Sliding capacity (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: Wall mounting (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) - 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 stability (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 (repulsion) - forces in the system
MW 5x3 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral 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 (implants) - 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: Impact energy (kinetic energy) - warning
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: Surface protection spec
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 (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. Shear force

*Caution: On a vertical surface, the magnet retains merely approx. 20-30% of its max power.

2. Plate thickness effect

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

3. Power loss vs temp

*For N38 grade, 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
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%
Sustainability
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
Quick Unit Converter
Force (pull)

Magnetic Induction

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This product is an extremely powerful cylindrical magnet, composed of durable NdFeB material, which, with dimensions of Ø5x3 mm, guarantees optimal power. The MW 5x3 / N38 component is characterized by high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.84 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. 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.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability in industry, 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 popular standard for professional neodymium magnets, offering a great economic balance and operational stability. 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.
This model is characterized by dimensions Ø5x3 mm, which, at a weight of 0.44 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 0.84 kg (force ~8.25 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
This rod magnet 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.

Pros and cons of rare earth magnets.

Benefits

Apart from their superior holding force, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
  • They show high resistance to demagnetization induced by presence of other magnetic fields,
  • In other words, due to the aesthetic surface of nickel, the element looks attractive,
  • Magnets are distinguished by extremely high magnetic induction on the surface,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Possibility of custom shaping and optimizing to individual applications,
  • Significant place in high-tech industry – they serve a role in mass storage devices, brushless drives, precision medical tools, and modern systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 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 stable to moisture, in case of application outdoors
  • Due to limitations in realizing nuts and complicated forms in magnets, we propose using a housing - magnetic holder.
  • Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. Additionally, small elements of these magnets are able to complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

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

The force parameter is a result of laboratory testing executed under standard conditions:
  • using a base made of low-carbon steel, acting as a magnetic yoke
  • whose transverse dimension equals approx. 10 mm
  • characterized by lack of roughness
  • without the slightest clearance between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in practice – influencing factors

Please note that the working load may be lower influenced by elements below, in order of importance:
  • Air gap (betwixt the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
  • Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Plate material – mild steel gives the best results. Higher carbon content reduce magnetic permeability and holding force.
  • Surface structure – the more even the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate reduces the holding force.

Safe handling of neodymium magnets
Beware of splinters

Beware of splinters. Magnets can explode upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Do not drill into magnets

Drilling and cutting of neodymium magnets poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Crushing force

Big blocks can smash fingers in a fraction of a second. Under no circumstances put your hand between two attracting surfaces.

Skin irritation risks

It is widely known that the nickel plating (standard magnet coating) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands and select coated magnets.

Implant safety

Warning for patients: Powerful magnets affect electronics. Keep at least 30 cm distance or request help to handle the magnets.

Keep away from children

Only for adults. Small elements pose a choking risk, causing serious injuries. Store away from children and animals.

Keep away from electronics

An intense magnetic field disrupts the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets close to a device to prevent breaking the sensors.

Heat warning

Monitor thermal conditions. Exposing the magnet to high heat will destroy its properties and strength.

Protect data

Equipment safety: Strong magnets can damage data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).

Powerful field

Before starting, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.

Important! Need more info? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98